Bulk Handling Today October 2019

BULK

HANDLING

T O D A Y

Endorsed by: CMA l LEEASA l SAIMechE l SAIMH Oct 2019

REMOVING NUCLEAR AND OTHER HAZARDOUS MATERIAL MODIFICATIONS ON FILTERS PREVENT CLOGGING

PARTNERSHIP IN PRACTICE

100% local manufacturer of Conveyor Belts and Industrial Hose

Our products and service systems are tailored specifically to the customers’ needs, providing economically efficient and technically proven solutions. Customers profit from a differentiated product range and optimum all-round customer care by our qualified specialists.

With a history dating back to the 1900s, in South Africa, we are fortunate to have obtained several industry-leading blue-chip customers who take advantage of the Company’s expanding product offering.

We are not your supplier - we are your partner

BLACK OWNED

LEVEL 1 B-BBEE

Benoni Plant 22 - 24 Lincoln Road, Industrial Site, Benoni +27 11 741 2500

100% LOCAL MANUFACTURER

Howick Plant 1 Induna Mills Road, Howick, Kwazulu Natal +27 33 239 7200

info@dunlop-africa.co.za www.dunlop-africa.co.za

BULK

HANDLING

T O D A Y

Endorsed by: CMA l LEEASA l SAIMechE l SAIMH Oct 2019

BULK D

Oct 2019

REMOVING NUCLEAR AND OTHER HAZARDOUS MATERIAL MODIFICATIONS ON FILTERS PREVENT CLOGGING

Contents

PARTNERSHIP IN PRACTICE

On the cover: tega Tel: (011) 421-9916 info@tegaindustries.co.za www tegaindustries.co.za

T O D A Y

CMA News

Technology

Cover Story

34

4 5 6

Company Profile From the Desk

30 AI Supports Colleagues

Partners in Practice - More Action than Slogan

Market Forum

Endorsing Bodies

Mining

•

CMA (Conveyor Manufacturers Association)

Beltcon 20

•

LEEASA (Lifting Equipment Engineering Association of South Africa)

•

SAIMechE (SA Institution of Mechanical Engineering)

•

SAIMH (SA Institute of Materials Handling)

•

also mailed to members of the RFA (Road Freight Association)

9 Help Needed 10 Hitting Gold at Half the Price 14 High-Powered Gearless Drives

Power Generation 23 Diversification is Key to Success

Infrastructure

25 Making Roads in the Northern Cape

Minerals Processing

27 Two Technologies in One

Environment

28 Going Nuclear with a Touch of Asbestos

Copyright

All rights reserved. No editorial matter published in “Bulk Handling Today” may be reproduced in any form or language without written permission of the publishers. While every effort is made to ensure accurate reproduction, the editor, authors, publishers and their employees or agents shall not be responsible or in any way liable for any errors, omissions or inaccuracies in the publication, whether arising from negligence or otherwise or for any consequences arising therefrom. The inclusion or exclusion of any product does not mean that the publisher or editorial board advocates or rejects its use either generally or in any particular field or fields.

Our e-mail address is bulkhandling@promech.co.za Visit our website on www.bulkhandlingtoday.co.za

The monthly circulation is 3 673

Proprietor and Publisher: PROMECH PUBLISHING Tel: (011) 781-1401 E-mail: bulkhandling@promech.co.za www.promech.co.za Managing Editor: Susan Custers Advertising Sales: Louise Cresswell DTP: Sanette Badenhorst Administration: Netta Janse van Rensburg Subscriptions: Please email us at accounts@promech.co.za if you wish to subscribe to “Bulk Handling Today” at R550,00 (excl postage and VAT) per year; R1 380,00 per year for Africa/Overseas.

Printed by: Typo Colour Printing, Tel: (011) 402-3468 FSC (Forestry Stewardship Accreditation)

BULK HANDLING TODAY

October 2019

3

COMPANY PROFILE

SKF South Africa

S

KF established its roots in South Africa over 100 years ago and is today a specialist supplier of bearings, engineering and rotating technology to mining and industry across southern Africa. Alongside its superior bearing offering, the company also provides a comprehensive portfolio of engineered solutions including world-class seals, lubrication, mechatronics, and power transmission supported by professional mechanical services.

SKF’s first-class end-to-end power transmission solutions cater to diverse applications in industries including agriculture, sugar, cement, coal, and minerals processing.

The product range of conveyor chain, belt drives, wedge belts, standard and specialist couplings, locking elements and rapidly detachable bushes, combined with specialist services, conveniently give customers access to all their power transmission requirements from a single-source supplier.

This Level 4, premium brand OEM further complemented its lubrication suite through the acquisition of Lincoln Lubrication South Africa in 2015, which saw the addition of lubrication as well as fire suppression systems to the portfolio.

Placing customers at the core of operation, SKF is dedicated to delivering its stateof-the-art solutions to customers irrespective of their locations.

Aligning to this goal, SKF has a well-established distributor network which comprises Authorised Distributors as well as Lubrication, Agricultural and Vehicle Service Market Distributors. As these distributors are ideally located

SKF Multilog On-line System IMx-8

close to customers, they are regarded as the face of SKF and a primary route to market.

Therefore SKF is focused on growing and upskilling the sales teams so that they are aligned with SKF knowledge.

SKF supports its stateof-the-art products, latest technologies, service and after–sales service capabilities through bestin-class training courses, enabling customers to innovate their businesses through upskilling their employees and enhancing their productivity levels.

SKF is armed with a cutting-edge ReMan Centre based at Johannesburg head office which is dedicated to providing exceptional refurbishment to OEM standards. Adhering to SKF’s stringent global quality control systems, this centre provides a highly affordable alternative compared to the cost of replacements, extends product life cycle and delivers swift turnaround times keeping customer downtime to a minimum for lowest total cost of operation and ownership.

SKF continues to expand its engineering services in line with a boosted focus on taking full ownership of equipment throughout the entire lifecycle. By offering customers its renowned contract services, after-market maintenance management and reliability service portfolio, SKF goes beyond simply providing a quality product. SKF is committed to building solid, long-term partnerships in order to deliver a lifetime service to customers.

More data capture opportunities.

Even in a limited space.

SKF South Africa (Pty) Limited Tel: +27 11 821 3591, Fax: +27 86 677 7876 Email: sales.za@skf.com, Web: www.skf.co.za

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BULK HANDLING TODAY

October 2019

CONVEYOR MANUFACTURERS ASSOCIATION

From The Chairman’s Desk

H

ere we are again gearing up for the end of year festivities when everyone really feels like 2019 is only beginning! The fifth and final Members’ Meeting for the year was held earlier this month and progress made in the various CMA Working Groups was reported on. The Members’ Meetings are held every two months and apart from providing valuable feedback on the activities of the association, they provide a forum for important networking, establishing new contacts, and meeting with clients and/or suppliers.

There is a full listing of every successful candidate going right back to 2008 When looking to the future, the CMA Research Panel has identified a number of research projects.

University students looking for a project to work on for post-graduate degrees are encouraged to look on the website for a list of these and make contact with the association if deciding to take up one for their studies.

A high priority

Education and training is always a high priority for the CMA and a number of CMA training courses have taken place during the year as scheduled and some have also been run on-site. The on-site courses lend themselves to being more flexible according to the client’s needs, and training officers and operations and engineering managers are welcome to discuss

Jay Pillay

their requirements with Beth in the office or email her on training@cmasa.co.za.

Unfortunately, the CMA transfer chute design course had to be postponed due to insufficient registrations. This will now be run in February next year. More information on all CMA training courses is on the website, as well as the dates for 2020, and most importantly, there is a full listing of every successful candidate going right back to 2008, when the first diploma in the design and operation of belt conveyors was held. The CMA website is www.cmasa.co.za.

Jay Pillay, Chairman

Membership at October 2019 All members subscribe to the CMA Code of Ethics Acrow Limited Actom Afripp Projects Altra Industrial Motion South Africa (Pty) Ltd Bauer - SUSPENDED Bearings International Belt Brokers Belting Supply Services BMG Bonfiglioli Power Transmissions Bosworth Brelko Conveyor Products CedoTech cc Closeal Manufacturing Collisen Engineering ContiTech South Africa (Pty) Ltd Conveyor & Engineering Equipment Conveyor & Industrial Supplies (Pty) Ltd Conveyor Watch (Pty) Ltd CT Systems David Brown Gear Industries DRA Projects SA (Pty) Ltd Dunlop Belting Products Dymot Engineering Company

ELB Engineering Services Electromote (Pty) Ltd Fenner Conveyor Belting (South Africa) Flexco SA (Pty) Ltd FLSmidth Roymec Giza Technologies (Pty) Ltd – SUSPENDED Habasit South Africa (Pty) Ltd Hägglunds Drives South Africa Hatch Africa (Pty) Ltd HMA South Africa (Pty) Ltd Hosch - Fördertechnik (SA) International Belting & Marketing (Pty) Ltd Iptron Technology cc KevConBelt (Pty) Ltd – SUSPENDED Leoka Engineering Lesa Mining Equipment and Conveyor Belt – SUSPENDED Lorbrand Magnet Service Binder CC Martin Engineering Melco Conveyor Equipment Merlin consulting (Pty) Ltd Moret Mining Nautilus Projects (Pty) Ltd – SUSPENDED

Nepean Conveyors OE Bearings Oriental Rubber Industries SA Osborn Engineered Products Pegasus Industrial Services cc Regal Beloit South Africa – SUSPENDED Rema Tip Top South Africa – SUSPENDED Ringspann South Africa Rossi Gearmotors (Pty) Ltd Rula Bulk Materials Handling SENET SEW Eurodrive Shaft Engineering (Pty) Ltd SKF South Africa – SUSPENDED Tenova Takraf ThyssenKrupp Industrial Solutions South Africa (Pty) Ltd Timken South Africa (Pty) Ltd Transvaal Rubber Company Voith Turbo Weba South Africa (Pty) Ltd WorleyParsons RSA Zest Electric Motors

BULK HANDLING TODAY

October 2019

5

COVER STORY

Partnerships in Practice – More Action than Slogan Situated east of Johannesburg is a 45 000m2 facility that houses Tega Industries Africa.

"

Bulk Handling Today" caught up with Tega Industries’ senior manager, Vishal Gautam.

The company, well known for its mill liners, has met the innovation and cost cutting challenge businesses face with its unique approach to sales, service and product embodied in their slogan ‘Partnerships in practice’.

The name Tega Industries came to SA in 2006 and their focus is on working with customers for better business outcomes.

“We are looking for a solution - but it’s more than that. Our branding used to be total solutions, now it is ‘Partnerships in practice’. On a day-to-day basis we align our goals with that of the industry and get into partnerships with our customers,” Vishal says.

“We are looking to reduce our customers’ Dollar or Rand cost per unit, which is important in an industry where commodity prices have, in the main, fallen.”

Copper for example was

Vishal Gautam

6

BULK HANDLING TODAY

October 2019

US$4.54 a pound in February 2011, as of October 2019 it is down to US$2.56 a pound.

How Tega reduces clients’ operating costs can be seen in their service solutions and investments into new products.

Efficiency gains

Two recent product developments are the combi liners and improved chute efficiency.

Two recent product developments are the combi liners and improved chute efficiency Tega’s Rubber Metal Combi Liner are designed and manufactured, depending on the impact and abrasion and the resistance property needed for the application.

Vishal says that the combi liners have given the company a completely new product line.

“We can now cater to markets we weren’t able to reach in the past, and we are getting a lot more queries from the mining industry.”

A re-think

He says the company is also working with customers to make chutes more efficient. They are achieving this by re-thinking chute linings.

“When plants are commissioned, chutes and conveyors are designed and built for certain operating parameters. However, as the plant begins operations those parameters often change. Sometimes ores change, there is plant capacity wear and tear, or a

change in the environment. So over time the chutes don’t operate as efficiently,” he explains “A chute is not a core function of a plant. It basically just helps transport material from one place to another. But if it clogs or blocks it can stop an entire plant.”

Vishal details their approach to solving the problem, “In the past one standard lining for the entire chute would be supplied, which is wrong because every part of the chute has it own usages. We create separate linings for the different parts of the chute such as thicker rubber linings for the top where there is more impact.

The company is currently redoing a chute for a large customer in the mining industry that should see the lifespan of the chute extended from around six weeks to six months.

Diversifying through new products

Although known for their work in the mining industry, Vishal says the company is diversifying and has done work in other industries such as cement and power.

“Our products are also sold in different areas such as ports. They haven’t all been our focus in the past, but we have a lot of good references, and the capability and space to develop and manufacture high quality products.”

With an emphasis on quality, Vishal tells us, “In the early days we offered fabricated tools, which were cheap but lasted six months. Now we are investing in tools as a division and moulding our tools. They are more expensive but they have a longer life span,” Vishal says.

The improvements are aided by the company’s

global expertise. Tega has a worldwide presence with manufacturing facilities in South Arica, Australia, Chile and India.

“We exchange ideas on platforms in the company so I can tap into knowledge in Canada or Europe or Argentina to solve a problem we may have in South Africa.”

A chute is not a core function of a plant. It basically just helps transport material from one place to another. But if it clogs or blocks it can stop an entire plant Customer retention

“South Africa is not without challenges,” Vishal says. “But you have to make a plan to get past those challenges. One thing I honestly believe is that if you are really honest with a customer and give them a good quality product with unmatched service and a good response times, you can retain the business for many years.”

In his typical down-to-earth approach, Vishal is aware this may not mean a customer for life.

“But the chances are good that you’re going to retain your clients,” he concludes.

Tega Industries, Vishal Gautam Tel: (011) 421-9916

BULK HANDLING TODAY

October 2019

7

High security welded mesh

Pallisade

Gates

Gate Automation

Razor wire and more ....

What is High Security Weld Mesh HIGH Security Weld Mesh is wire fused and welded at a Horizontal distance of 76.2mm and a vertical distance of 12.7mm also known as 35B/3510 where 3 denotes 3”(distance between vertical wires), 5 denotes 0.5” (distance between horizontal wires), and B or 10 denotes gauge of wire

Salient Features • Difficult to Climb: The spaces between the Horizontal wires are too narrow for fingers to have grip • Impregnable: Extremely difficult to cut with a hand cutter as the beak of a wire cutter will not be able to penetrate the horizontal wires • Excellent Replacement option to Solid Wall as: 1. More economical than a solid wall 2. Faster to install than a solid wall 3. CCTV Camera has a clear view • Further upgrade possible with electric security system • Anti-corrosive & low maintenance

Standards

• Manufactured according to BS EN 10016-2 • Wire Sizes in accordance with BS EN 10218-2 • Tolerance on Mesh Size in accordance wiht EN 10223-7 • Tolerance on Panel Size in accordance with EN 10223-4 • Welding Strength in accordance with BS EN 1461 • Zinc Coating in accordance with EN 10245-1 • Anti Corrosion in accordance with BS En 3900 E4/F4

Tensile Strength • Wire has a tensile strenght of min 550 MPA

MARK: 083 454 6488 8

Email: mark@palifence.co.za

www.palifence.co.za

BULK HANDLING TODAY

October 2019

MINING

Help Needed Surface mining association, Aspasa, has called on suppliers of the industry and those who make use of its products to become more involved and assist in the shaping of the industry to meet future challenges.

“

We want to be proactive and ensure everybody in the surface mining value chain is directly involved in shaping the industry of tomorrow. As an industry we obviously rely heavily on suppliers and want to encourage healthy two-way cooperation that can improve and support our members’ efforts,” says Aspasa director, Nico Pienaar.

Recent legislation

The importance of this type of cooperation has recently been illustrated with legislation surrounding proximity detection systems (PDS) that has been legislated and will be required on new equipNico Pienaar of Aspasa has invited suppliers to the surface mining industry to ment supplied to mines on become members of the association trackless mobile machines.

In this instance, Aspasa worked closely with authorities and industry experts in conjunction with equipment suppliers and technology developers to formulate a strategy for

small and medium sized surface miners.

Expertise and assistance needed

“This has given rise to a sector-specific strategy that is acceptable to all parties concerned and in time to meet authorities’ looming deadlines. However, there are many more instances where we can use the expertise and assistance of suppliers and end uses in the form of establishing best practices, training of members, advisory services and compliance.

We want to be proactive and ensure everybody in the surface mining value chain is directly involved in shaping the industry of tomorrow “In order to integrate effectively with our association, we recommend joining in order to gain the benefit of directly interacting and addressing the members through our regional and national networks. Associate members will also be given the opportunity to host events in their fields of expertise to further awareness among members,” concludes Nico.

Aspasa Nico Pienaar, Tel: (011) 791-3327 Email: nico@aspasa.co.za, www.aspasa.co.za

BULK HANDLING TODAY

October 2019

9

MINING

Hitting Gold at Half the Price Vista Gold Corporation owns the Mt Todd project in Australia, which was acquired in 2006 and is one of the country’s biggest undeveloped gold resource. The project, briefly operated in the 1990s, is known for having hard ore. This, and the fact that the project was operated previously, presented particular challenges for Vista Gold.

“

We had a desire to find a way to only spend money to process the rock that had gold in it,” explains Fred Earnest, President and CEO of Vista Gold. “We started looking for ways to get rid of the non-mineralised host rock prior to the grinding circuit. We looked at different technologies to address the issues at the Mt Todd project and contacted Tomra Sorting Mining to find out about its sensor-based sorting technology.”

We realised that this was not just a dream, this was real technology being applied at a production rate to our rock Technology makes the case

Tomra invited the Vista Gold team to visit their testing facility in Germany with a sample from the project to see first-hand what could be achieved.

The test was an eye opener for Fred, “In every evaluation of new technology, we have “aha moments”. For us it was the day we were at the facility in Germany watching our rock being sorted on a production-scale machine. When we saw how fast it was happening, the product sorted and rejected, and when we were able to pick it up and look at it, we realised that this was not just a dream, but Fred Earnest

10

BULK HANDLING TODAY

October 2019

real technology being applied at a production rate to our rock. All of a sudden, we realised that this was technology that would work for us at Mt Todd and that we needed to evaluate more seriously.”

Two stage sorting

Vista Gold has integrated Tomra’s two-stage sorting solution in its flow sheet at Mt Todd. The system sorts 20 tonnes per hour, using X-Ray Transmission (XRT) technology to remove particles containing

sulphide minerals and subsequently lasers to remove particles containing quartz and calcite.

The benefits of the solution to the Mt Todd project are two-fold. On the one hand, operating costs have been reduced, “We’re getting rid of material and not spending money grinding rock that has no value,” explains Fred. On the other hand, gold recovery has improved, “We’ve been able to make design changes in the plant. Because we’re processing less

BULK HANDLING TODAY

October 2019

11

12

BULK HANDLING TODAY

October 2019

MINING

material, we’re now able to do a finer size. With finer grind, our gold recovery has gone up. This has resulted in improvements of grade by 10%."

Tomra Nina Gustmann Tel: +34 91 415 30 20 Email: Nina.Gustmann@tomra.com www.alarconyharris.com

The system sorts 20 tonnes per hour, using X-Ray Transmission (XRT) technology to remove particles containing sulphide minerals and subsequently lasers to remove particles containing quartz and calcite.

BULK HANDLING TODAY

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13

BELTCON 20

High-Powered Gearless Drives The requirement for increased capacities, higher material lift and increased conveying distances in “mass mining projects� has resulted in various belt conveyor developments.

A

Dr. Mario Dilefeld

Matthias Pohl

Figure 1: Mining hoist with synchronous motor

Figure 3: Gearless conveyor drive overview

14

BULK HANDLING TODAY

October 2019

n increase in drive size and belt strength is one option to address this requirement. Other options are alternative drive concepts such as driven idlers, TT-drives or tripper-booster drives. Unfortunately, it is not always possible to implement such alternative drive technologies and the traditional arrangement with head- and tail drives is often still the best technical and economical option. As such, this paper is focused on the standard drive arrangement.

Conveyor belts with a strength of up to 7 800N/mm have been in use for the last 20 years. Electromechanical drives, consisting of electrical motors (wound rotor or squirrel cage motor) and bevel helical gears with a capacity of up to 3 150kW, are currently in use in South American copper mines.

Figure 2: Typical gearless conveyor drive arrangement

BELTCON 20

As described above, there are increased performance requirements for belt conveyors today. Moreover, there are two possibilities to overcome this challenge: • Reduced conveyor flight lengths • Further increase in belt strength and drive size Sometimes, the increase in the number of flights is the most economical way to achieve this, especially with regard to capex. However, if the conveyor routing does not allow additional transfer points, the main components – such as belt quality and drive size - are objectives for further development.

One such example is tunnel conveyors in which underground drive- and transfer stations are to be avoided or minimised due to the immense efforts required for excavation and for cooling of the drive components.

mechanical gears with the resultant advantage of higher drive efficiency and reduced efforts for maintenance. These important advantages result in an interesting opportunity to employ gearless conveyor drives even in power ranges that have always been the realm of electro-mechanical drives.

Concepts for Gearless Conveyor drives

The idea of connecting a synchronous motor direct (without gearbox) to a drive pulley is not completely new. More than 30 years ago, the German company O&K installed two 3 100kW synchronous motors on a 3.7km long inclined underground conveyor at a German coal mine together with Siemens.

Synchronous motors operate across various industries and applications. Figure 1 shows a typical component arrangement on a mining hoist.

How then is one able to increase the installed power? Electro mechanical drives are limited by the capability of the bevel helical gear to 3500kW. Parallel shaft drive arrangements have increased space requirements and face limitations with flexible low speed couplings.

The same concept is applicable to belt conveyors. A motor, operating with pulley speed, is coupled directly to the drive pulley (figure 2). In combination with newly developed hightension belting (St 10,000) each drive pulley can transfer a drive torque of up to 1 800 000Nm (10,000 kW at 53rpm).

Gearless conveyor drives, acclaimed for their widespread use in mining hoists, are a suitable solution. Drive power of up to 10 000kW, per motor, is possible. There are no

Gearless conveyor drive design For gearless conveyor drives, synchronous motors with permanent excitation (with permanent magnets) or with external excitation (flow of electrical current through the exciter winding into the rotor) are possible.

Permanent magnet motors are suitable for medium power range applications, whilst externally excited motors are employed at the upper end of installed motor power applications. Figure 3 represents a diagram of the motor types and the possibilities for motor arrangement.

Maximising motor speed is an important general principal for conveyors with gearless drives. Drive size and costs are directly influenced by motor torque since there is no gear between the pulley and the drive. An example: if it were possible to increase drive pulley speed from 50rpm up to 70rpm, motor torque and motor size would decrease from 765kN•m to 545kN•m with resultant significant cost savings.

Motor speed/rpm is defined by:

Figure 4: Permanent magnet motor

•

Belt speed

•

Drive pulley diameter

If it were possible to increase belt speed from 5.2 m/s up to 6.6m/s and to decrease drive pulley

Figure 5: Permanent magnet motor installation

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BELTCON 20

diameter from 2.0m down to 1.8m, the aim, as described above, would be reached.

Belt speeds up to 7m/s are common for overland conveyors.

In the event of higher belt speeds, the idler concentricity and the idler speed would have to be double-checked. Machined and balanced idlers might be required to limit transversal belt oscillations and to increase idler lifetime in the event of

higher belt speed values. Larger idler diameters are the other option. With limited idler speed (about 750rpm) standard idlers will meet the requirements as well.

The forces between pulley and belt, as well as belt quality, define drive pulley diameter. Pulley face pressure has an influence on the friction factor between pulley and belt. Furthermore, limits in pulley face pressure and pulley shear pressure must be taken into account for pulley lagging selection.

The pressure under each cord of the belt carcass must be considered to avoid cutting the cord into the belt cover. Steel cord diameter of the belt carcass defines the minimum belt-bending radius considering belt splice characteristics.

Figure 6: Field excited synchronous motor

Actual DIN and ISO standards provide data tables for pulley diameter selection based on belt type, carcass/cord thickness and belt tension values. This design method is sufficient for standard belt conveyors.

However, for conveyors with “high-powered gearless drives” it would be more beneficial to also consider some of the details for drive pulley diameter selection as described above.

Permanent magnet motors

Permanent magnet motors have been around for decades – in ship propulsion, pumps, fans, blowers, wind power generators, automotive, etc.

For conveyor drives, there are two different drive systems available on the market: •

Permanent magnet motor with planetary gear

•

Permanent magnet motor directly coupled to the drive pulley As the focus of this paper

Figure 7: Externally excited motor with membrane coupling

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BELTCON 20

is on “high powered gearless drives”, the planetary gear system is not considered further.

Compared to an externally excited synchronous machine, a permanent magnet motor is lighter, more compact and more energy efficient since there are no losses for external excitation.

There are two possibilities for motor installation: • Rigid coupling between rotor and pulley (flange coupling) and torque arm between stator and steel structure or foundation (left hand side on figure 5) • Base mounted motor and torsional rigid coupling between rotor shaft and pulley (right hand side on figure 5)

Externally excited motor

Externally excited synchronous motors are state-of-the-art motors specifically suited for large equipment pieces such as large compressors, grinding mills, grinders and mining hoists.

The motor consists of the components shown in figure 6.

For motor installation, there are two possibilities: • Motor with bearing(s) (flexible coupling between drivepulley shaft and motor shaft) • Bearingless motor – cantilevered design (rotor direct coupled to the drive-pulley shaft) Both systems boast advantages and disadvantages. A main advantage of a motor with bearings is that the drive can be assembled in a clean motor-factory environment. The motor is then shipped to site after factory testing in one unit without requiring disassembly for installation. In the event of motor failure, it is possible to disconnect the drive in a short time.

It is important that the air gap between stator and rotor (up to 20 mm) remains constant and motor bearings are helpful

in order to minimise air gap variations, caused by the pulley shaft bending with different belt tensions, all factors that work towards improving motor efficiency.

For smaller power ranges (2.5 and 3.5 MW), a motor with bearings on both sides and a geared coupling between pulley and motor is a usual configuration. At upper power ranges, a support bearing on the non-driven motor end and a membrane coupling between rotor shaft and pulley is employed as a Takraf patented solution.

The advantage of a direct-coupled rotor solution is the simplicity of the system. A special drive pulley that promotes reduced bending of the shaft is required to keep the air gap variation within an allowable range.

On both motor installation types, the stator can be directly connected to a foundation or to a steel structure.

As a patented solution, with a special motor frame design, the drive (the stator) is easily adjusted with spindles, hydraulic cylinders and/or eccentrics on the steel structure. In case of pulley re-alignment requirements, the related drive adjustment can be conducted without significant effort.

Motor design selection, in conjunction with the entire “drivetrain” (incl. drive pulley etc.), is only defined after discussions with the client and follows on from project specifics, such as surface or underground operation and so on.

High-powered gearless drive conveyor example

Takraf has installed eleven externally excited synchronous motors with 900 kNm (5 000kW at 53rpm) each on the Chuquicamata Underground Project conveyor system in Chile. Design capacity of the system is 11 000 t/h of primary crushed copper ore.

Conveyor Length [m]

Lift [m]

Belt Width [mm]

Speed [m/s]

Inst. Power [kW]

Belt Type

Principal Conveyor C-01

3.303

495

1.800

7

20.000

ST-10.000

Principal Conveyor C-02

3.039

456

1.800

7

20.000

ST-10.000

Overland Conveyor OLC-01

5.330

287

1.800

7

15.000

ST-6.800

Table 1: Chuquicamata Underground Project - main conveyor data

There are three conveyors boasting high-powered gearless drives as can be seen to the left.

All conveyors boast head drives only.

There are two 5 000kW motors at the primary drive pulleys. Both principal conveyors boast two 5 000kW motors at the secondary drive pulleys as well.

The secondary head drive pulley on the overland conveyor boasts one drive.

To reach the maximum possible motor speed, which results in minimum motor

Figure 8: Conveyor C-01 pulley configuration

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BELTCON 20

torque, was one of the key design tasks.

A belt speed of 7m/s, in combination with optimised material transfer points, enables safe and efficient conveyor operation.

Idler concentricity and dynamic idler balancing values are

specified with tight tolerances. It was therefore possible to reach these specified values without machining the idler’s surface.

The material transfer points are designed in order to protect the conveyor belt from the direct impact of larger lumps, to reduce belt wear by means of smooth material loading and to increase maintainability of all components. The combination of rock-box design and grizzly finger arrangement was simulated by Takraf employing DEM-Analysis, prior to finalising the design.

After the belt speed was set, the minimum possible drive pulley diameter had to be selected. The minimisation of drive pulley diameter for high-powered gearless drives is a general approach.

Due to the fact that the drive station of the principal conveyor C-01 is located underground in a cavern, it was required to minimise the number of pulleys and pulley diameters.

The influencing factors for drive pulley selection are: • Pressure under each cord of the belt carcass and minimum belt bending radius considering belt splice characteristics • Pulley face pressure and pulley shear pressure • Friction factor between pulley and belt

Diagram 1: Friction factor between pulley and belt as a function of pulley face pressure

A three-pulley drive station layout (primary drive pulley, secondary drive pulley and bend pulley) was the preferred option driven by the space limitations within the underground cavern.

1 - Pressure under each cord of the belt carcass

As per conveyor calculations, the belt tensions in operation with design capacity at the primary drive pulley are T1=3 600kN on the tensioned side and T2=2,300kN on the slack side. Belt tension on the slack side of the secondary drive pulley is T3=1 000kN. With the steel cord diameter and the cord pitch of St 10 000, the minimum drive pulley diameter is 2 400mm with an allowable pressure value of 2.0 MPa under each cord.

With an additional traversal reinforcement (breaker) under the cords, it would be possible to increase allowable pressure values slightly.

2 - Pulley face pressure and pulley shear pressure

Figure 8: 900 kNm (5,000 kW at 53 rpm) drive unit fully assembled in motor factory (ready for shipping)

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New extents in belt strength (St 10 000) led to challenges in pulley lagging design. Face pressure values up to 1.2 MPa are known from literature, whilst maximum published shear pressure is 0.15 MPa. Both values are valid for hot

BELTCON 20

vulcanised rubber lagging.

• 0.75 MPa at the secondary drive pulley

A drive pulley diameter of 3 000mm would thus be required with the values above.

Based on the belt tensions above. Diagram 1 shows, for a wet environment (at the underground cavern), the following:

The possibility of allowing for increased pressure values was discussed with Rema Tip Top in Germany, the company that applies the pulley lagging. As a first decision, hot vulcanised rubber was selected as the best solution for this application.

• Friction factor µ=0.22 at the primary drive pulley and

With 1.5 MPa of face pressure and 0.6 MPa of shear pressure, new limits for actual rubber compounds were able to be achieved. Through the application of these new limits, it was possible to reduce the minimum drive pulley diameter to 2 500mm.

3 - Friction between pulley and belt

• Friction factor µ=0.28 at the secondary drive pulley With the belt tensions and friction factors, we are able to check required belt wrap angles " 1 and "2.

The Eytelwein equation:

1

Criteria 1 and 2 led to a minimum 2 500mm drive pulley diameter. The related friction factor depends on the pulley face pressure and on the surroundings (dry, wet or dirty environment/mud between pulley and belt).

provides required wrap angles of

The average pulley face pressure in operation is:

• " 2 ≥ 170° at the secondary drive pulley. The belt wrap angle, as designed, is 188°. With the selected parameters, this angle is split in 170° active angle and 18° passive angle

• 1.35 MPa at the primary drive pulley and

• "1 ≥ 117° at the primary drive pulley. The belt wrap angle, as designed, is 174°. With the selected parameters, this angle is split in 117° active angle and 57° passive angle

After double-checking the friction between pulley and belt, all three criteria were met with a 2 500 mm drive pulley diameter. This diameter was then employed for conveyor design and for motor torque specifications.

Figures 8 and 9 show the motor in the motor factory and during construction on site.

This paper was first presented at the Beltcon Conference in 2019.

Copyright is vested with IMHC. www. beltcon.org.za Takraf Dr. Mario Dilefeld E-mail: mario.dilefeld@tenova.com Matthias Pohl Email: matthias.pohl@tenova.com

Figure 9: 900 kNm drive unit during construction

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TRACE In is a glo antio leading party ri

TRACE due diligence solutions are based on internationally accepted best practices and our experience and familiarity with the compliance needs of multinational companies. Services range from a denied parties screening to enhanced due diligence, including TRACE Certified Due Diligence.

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nternational, Inc. obally recognized bribery business organization and provider of third isk management solutions.

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POWER GENERATION

Diversification is Key to Success Being part of the broader Hudaco Group allows Bearings International (BI) to leverage synergies across a broad range of companies, meaning it can offer a complete product basket at its branches network countrywide.

I

n order to maximise this leverage across diverse industries, BI has successfully implemented a new business development leader (BDL) management structure, with a dedicated and focused approach to core market segments. These segments are mining, agriculture, sugar, OEMs, steel, FMCG, automotive, services and infrastructure, wholesale and retail, and cement, pulp & paper and chemicals.

A finger in every pie

From bearings to variable speed drives (VSDs), motors, gearboxes, sprockets and chains, BI offers total solutions for a diverse range of customers, applications, and industries. Tier 1 automotive OEM applications, for example, are serviced from BI’s warehouse in Parkhaven, which also features a bonded store facility.

An example of BI’s diversification into ancillary products is adding electronic motor control solutions from the Hudaco Group’s Varispeed offering.

Varispeed has just launched its VDrivePlus and AlphaDrive-Micro VSDs onto the market.

The AlphaDrive-Micro VSD from Varispeed is a compact frequency inverter ranging from 0.2kW to 5.5kW, and available in 240V and 400V. Together with the VDrivePlus, these VSDs offer a great performance-to-cost ratio, without compromising on quality and reliability. “Due to the current economic environment, the market is very price-sensitive.

Therefore, any energy-efficiencies or cost-savings we are able to offer is hugely beneficial,” Victor Strobel, Bearings International customer offer marketing manager says.

Ideal for South Africa

Certified in accordance with the latest European standards and regulations, the Alpha Drive Micro and Micro Plus are ideally suited to most applications in the South African market, including mining, food and beverage, manufacturing, and agriculture.

Due to the current economic environment, the market is very price-sensitive. Therefore, any energy-efficiencies or cost-savings we are able to offer is hugely beneficial The VDrivePlus from Varispeed is a much larger drive, ranging from 0.4kW to 400kW, available in 240V and 400V. This more advanced VSD features advanced motor control based on DSP technology, together with ‘smart’ auto-tuning. Additional features include flexible inverter control, dual high-resolution analogue inputs, and free mappable I/O channels.

The Varispeed VSD’s can be supplemented with the Bauer electric motor range from BI. "With our range of cast iron and aluminium motors we are able to assist customers with a wide range of applications from 0.18KW to 355KW 400V and 525/550V including pumps, conveyor belts, sanding machines, cooling towers, crushers and pedestal drilling machines, among others," adds Victor.

“While the customer bases vary, there are definite synergies that we can tap into.

It is all about positioning ourselves as a total solutions provider that is a single point of contact for all of our customer needs,” he concludes.

BI Victor Strobel Tel: (011) 899-0000 Email: info@bearings.co.za www.bearings.co.za

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WORLD-CLASS performance requires speed, agility and endurance

STRATEGY

INFRASTRUCTURE

OPERATIONS

Planning strategic direction benchmarked to world-class standards

Development of world-class infrastructure from concept to realisation

Development of operations to best practice and world-class standards

Supply Chain Strategy

Facility Design & Development

Process & Operations Design

• Supply Chain network analysis & design • National & Regional DC strategy development • Facility Sizing and OPEX estimates • On-line fullllment • Slow vs. Fast movers network set-up • A Supply Chain that supports business strategy • Site development strategies • Technology, IOT and digitilisation strategy

• Greennelds site development

• Operations assessment and benchmarking • WMS / WCS review • WMS / WCS functional requirements • Process and operations optimisation • Long term operational development strategies • Process audit • Labour standards and incentive programs

planning • Brownnelds site development planning • Functional building requirements speciication • Technical liaison to professional / development team • Facility sizing requirements (short to long term) • Design to execution • Procurement, program and vendor management

In today’s competitive business world you need to focus on every opportunity to advance your company mission

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ils-ct@ils.co.za ils-jhb@ils.co.za www.ils.co.za

INFRASTRUCTURE

Making Roads in the Northern Cape From Anglo American’s Kumba Iron Ore Mine to the AMG Group’s manganese operations, Goscor Earth Moving (GEM) Kathu, a multi-franchise branch of Goscor Industrial & Construction Equipment, is making inroads in the Northern Cape mining region with both the Sany and Bobcat brands.

G

EM Kathu acting branch manager, Rudi Burger reveals that the branch recently supplied 15 Bobcat skidsteer loaders to three different contractors and is currently negotiating with a fourth.

Good for cleaning up

“The Bobcat skidsteers are mainly being used for cleaning operations on the minerals-processing side, clearing debris and over-spillage from the conveyor belts,” Rudi explains. The compact design and excellent manoeuvrability of the machines in confined spaces, in particular, makes them ideal for this application.

With an existing Sany fleet of ten excavators, ten load-haul dump trucks, and six front-end loaders, Rudi reveals that the AMG Group is also looking to acquire a Sany SY750 excavator. It is ideal to load blasted material onto articulated dump trucks (ADTs), as well as for stripping top soil and free digging. For example, the 4.2m3 bucket means that a 40t ADT can be loaded in less than seven passes, making it ideal for the group’s extensive high-volume manganese mining operations.

Rugged machines

What sold the client on both Sany and GEM has been the superlative service support and technical back-up. While the Sany SY500 is a highly rugged machine, the extremely dusty conditions these excavators were operating under required some modifications on the filters to prevent them from clogging up prematurely.

The extremely dusty conditions these excavators were operating under required some modifications on the filters to prevent them clogging up prematurely “We had to install a top-spin pre-filter on the air filtration system in order to alleviate the dust issue and the excavators have been operating without a hitch ever since,” Rudi concludes.

Goscor Debby Marx Tel: (011) 230-2600 Email: dmarx@goscor.co.za www.goscor.co.za

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MINERALS PROCESSING

Two Technologies in One FLSmidth has released two products that advance flotation recovery. The mixedRow Flotation System, which combines the best attributes of two technologies to create next-level results is now ready to hit the market along with a new froth recovery upgrade package.

F

lotation systems are a vital technology in minerals processing and extraction. But despite their overall effectiveness, particles of valuable ore still get disposed of along with waste material. Additionally, the energy consumption that flotation systems require to function effectively is high. So while flotation systems are necessary when recovering ore, making them more sustainable and energy-efficient has been a challenge.

Improve and innovate

FLSmidth’s desire to improve and innovate has led to the development of the mixedRow Flotation System. It is a design that combines two machines, namely nextStep forced air and Wemco self-aspirating technologies. It provides the solutions to challenges presented by older flotation systems by combining these two cells to produce a system that is much more than the sum of their individual parts.

machines are placed at the beginning of the row, where they can recover coarse material using the least amount of energy possible. Because of this positioning, the mixedRow lowers energy consumption by between 15-40%, and increases recovery by up to 5%.

The machines are placed at the end of the row, which increases both coarse and fine particle recovery, as it is capable of treating a wide range of particle sizes The Wemco machines are placed at the end of the row, which increases both coarse and fine particle recovery, as they are capable of treating a wide range of particle sizes. The elevated rotor position within the machine also reduced energy consumption, as the froth only has a short distance to travel. mixedRow also has the lowest head loss on the market, as its carefully engineered system of dart valves allows for efficient transfer of slurry from one tank to another without significant losses.

FLSmidth Dariusz Lelinski Tel: +18015563252

Features and capabilities

The mixedRow Flotation System is the first of its kind, as it exploits the characteristics of two separate technologies at the same time. The nextStep

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ENVIRONMENT

Going Nuclear with a Touch of Asbestos A critical aspect of the removal of industrial, chemical, and mining plants is dealing with any hazardous materials present on-site in a responsible and cost-effective manner, while complying with all applicable regulations.

J

et Demolition has carried out such projects under extremely demanding conditions, including radioactive decontamination according to IAEA (International Atomic Energy Agency) and NNR (National Nuclear Regulator) standards. “We also regularly conduct decontamination and safe disposal of a broad spectrum of hazardous industrial materials and chemical substances,�

Jet demolition safety manager, Marthinus Botha comments.

Well equipped

The demolition specialist is well-equipped and experienced to deliver environmentally-responsible, but also practical projects for large industrial and mining sites. It has previously demolished an extensive range of industrial, chemical, and mining plants, where a wide spectrum of toxic or hazardous materials were decontaminated, treated, neutralised, or disposed of.

The company is registered with the Department of Labour as an asbestos contractor, and is certified to safely remove all types of asbestos in strict accordance with the relevant regulations and standards These include arsenic, uranium isotopes, methane, hydrochloric, hydrofluoric and sulphuric acid, cyanide, benzene, chlorine, hydrogen peroxide, oxygenated solvents, vanadium pentoxide, limestone ammonium nitrate, lead, manganese, mercury, and sodium hydrosulphide.

In addition, the company offers asbestos abatement, which is often associated with the demolition of

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older structures. The company is registered with the Department of Labour as an asbestos contractor, and is certified to safely remove all types of asbestos in strict accordance with the relevant regulations and standards, such as the Asbestos Regulations 155 of 2002, Environmental Laws Amendment Act 14 of 2009 and Waste Act 59 of 2008.

Trained with the correct equipment

“Our personnel are fully trained and experienced to identify and handle asbestos, including asbestoscontaminated materials. We work closely with independent occupational hygienists to develop a comprehensive asbestos plan of work, and carry out compliance and air monitoring throughout the course of the project,� Marthinus explains.

contaminated ballast. Similarly, old mines are fraught with asbestos contamination that must be assessed, identified, and mapped carefully, and then handled appropriately.

While this is a niche service, Jet Demolition offers asbestos abatement and decontamination of uranium and other hazardous materials as part of its turnkey demolition solutions.

Jet Demolition Kate Bester Tel: (011) 495-3800 Email: kate@jetdemolition.co.za www.jetdemolition.co.za

The biggest challenge is posed by asbestos-associated infrastructure.

Rail lines used to transport asbestos material are often contaminated with fly material, resulting in thousands of tonnes of contaminated ballast Specialised PPE (personal protective equipment) is required to undertake the works, as well as method-specific equipment such as HEPA filter vacuum cleaners. Jet Demolition has asbestos decontamination units as part of its fleet, meaning it is able to offer this service without restriction. Both dry and wet removal and encapsulation techniques are deployed, thereby best limiting the spread of asbestos fibres.

The biggest challenge is posed by asbestos-associated infrastructure. Rail lines used to transport asbestos material are often contaminated with fly material, resulting in thousands of tonnes of

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TECHNOLOGY

AI Supports Colleagues Since early 2019 an artificial intelligence solution (AI), supported by Microsoft’s cloud platform Azure, has been integrated into the processes of the largest materials distribution and service provider in the Western world.

"

alfred" supports its colleagues at materials services in dynamically managing the global logistics network with 271 warehouse sites and more than 150 000 products and services. As with his namesake, Alfred Krupp, all information comes together at alfred. As a first step, alfred will help to optimise transport routes and save the transport of thousands of tons of material per year. In addition, materials will be available more quickly at the right locations in the future.

Klaus Keysberg, CEO of thyssenkrupp materials services says, "Artificial intelligence is one of the technologies that will make a decisive contribution to competitiveness in materials distribution in the future. With alfred we are taking an important step

Digitalization in materials services

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Artificial Intelligence 'Alfred'

towards making our processes even more efficient and optimising our value chain," says Klaus

Using Big Data systematically

Integrated logistics in materials distribution

With AI, the approximately 14 million order items received annually by materials services can be processed and analysed much more efficiently. For the first time, materials experts are also bringing all company data together on a single platform.

Using self-learning algorithms based on Microsoft Azure Machine Learning, alfred analyses all relevant information, generates important findings and supports employees with appropriate recommendations.

Using self-learning algorithms based on Microsoft Azure Machine Learning, alfred analyses all relevant information, generates important findings and supports employees with appropriate recommendations Lifelong learning

In the company's own digital transformation office in Essen, all strands of digitalisation flow together.

Here, integrated teams of IT experts, engineers and business coordinators work under the direction of Axel Berger, head of digital transformationat thyssenkrupp, on various digitalisation projects that arise directly from the core business of materials services, including alfred.

The materials experts are supported by Microsoft and its global cloud platform Azure. "Joining forces with Microsoft allows us to use advanced technologies for our in-house developments. This enables us to ensure that the projects are very closely linked to our core business on the one hand, and that they are technologically state-of-the-art on the other," concludes Axel. thyssenkrupp, Lars Bank. Tel: +49 (201) 844-534416 Email: lars.bank@thyssenkrupp.com www.thyssenkrupp-materials-services.com

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“THE LINK FOR AFRICAN TRADING”

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TRANSNET FREIGHT RAIL

www.transnetfreightrail-tfr.net

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MARKET FORUM

Technology to drive process and equipment efficiencies Digital design and simulation technology tools are enhancing Weir Minerals Africa’s solution offering.

for instance, to model the behaviour and flow of liquids and gasses.

“With our focus firmly on integrated solutions, we are increasingly able to leverage technology to benefit our customers,” says Christian Stehle, head of engineering at Weir Minerals Africa. “This applies not only to how we design our product solutions, but how we help customers examine their whole process.”

“In addition to analysing our own equipment, we can also understand more about what happens upstream of our equipment,” he says. “Understanding material flow at various points of the customer’s plant process is vital to optimising how our equipment works.”

Simulation and modelling software tools are key enablers in this quest. They give the Weir Minerals Africa engineering team the power to use computational fluid dynamics (CFD),

Weir Minerals Africa Christian Stehle Tel: (011) 617 0700 Email: sales-za@weirminerals.com, www.minerals.weir

Weir Minerals Africa is increasingly able to leverage technology to benefit our customers

ABSOLUTE MATERIAL FLOW CONTROL

CHUTE SYSTEMS & SOLUTIONS • Optimum material flow • Up to 80% decrease in material degradation

• Reduced dust and noise levels • Virtually maintenance free

Tel: +27 (0) 11 827-9372 email: info@webachutes.com

www.webachutes.com

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• Greatly reduced spillage • Significant reduction in belt damage

MARKET FORUM

Light crane systems One of the most popular in South Africa is Demag’s KBK Aluline Light Crane system. The extremely low weight aluminium overhead crane system enables the design of almost any overhead suspension crane or monorail system with outstandingly smooth operation.

It is the right solution wherever a track and crane installation has to provide high performance for a low weight. It is used in a very wide range of applications. The aluminium overhead crane system enables users to design almost any overhead suspension crane or monorail system with outstandingly smooth operation.

needs of a wide variety of loads, processes and production conditions. The crane reliably accommodates kick-up forces with great positioning accuracy, and at high operating speeds. Another option is the KBK suspension monorail.

This system is specifically designed for linear, overhead handling for complex installations.

Demag Richard Roughly Tel: (011) 898-3500 Email: richard.roughly@konecranes.co.za. www.demagcranes.com

Single or double-girder suspension cranes from the KBK light crane system enable faster and more reliable area-serving overhead handling and exact positioning of a wide variety of goods.

Larger loads can also be moved beyond the crane runway using overhang and extending cranes from the KBK system. These cranes are fitted with crane girders that extend beyond the width of the crane runway, up to 2 500mm beyond the runway span.

An outstanding example of this versatility is the KBK manipulator crane. It can be designed to meet the exact

100th delivery Kemach JCB in Cape Town, has delivered to Quicksilva Burcon Hire, their 100th backhoe loader. The first machines bought by Burcon Plant Hire were in 1990 when they purchased four JCB 3CX models.

The 3CX model has since evolved into one of the most popular backhoe loaders in South Africa due to its quality of engineering (which is regularly upgraded), cabin features and reliability.

Since Joao Da Silva, owner of Quicksilva Burcon acquired the company, he has doubled the fleet size and expanded the machine range from predominantly backhoe loaders to excavators, loadalls, loaders, skidsteers and compaction rollers. Their entire fleet currently comprises JCB machines with the exception of one excavator which was absorbed by Da Silva from the previous owner. Joao says, “The high level of service and technical support that I receive from Kemach JCB in Cape Town is what has made me identify them as the brand to stay with. The quality and reliability of the JCB equipment is precisely what I need in my line of business”.

Kemach Equipment Carmen Hayes Tel: 011 826 6710 Email: carmenh@kemachjcb.co.za

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MARKET FORUM

Safety critical Safely deploying tower cranes on construction sites is critical to raise the pace of the project through higher productivity, however any non-compliance with the numerous safety regulations will have the opposite effect.

Brenden Crous, managing director of local Potain distributor Crane & Hoist Equipment SA, says that the company is well versed in all relevant safety regulations and can take as much of the administrative load as possible off its customers’ shoulders when it comes to lifting-related safety compliance.

“Erecting tower cranes requires competent and experienced crews who undertake the risks associated with this activity.

One of our main priorities is to control the risks associated with working at height,” says Brenden.

The company covers all bases with the necessary procedures and documentation, so that everything is on hand for inspection. This is very important as Brenden highlights that should there be any significant gaps in compliance, then a Department of Labour inspector may consider a site shutdown, leading to costly and inconvenient delays.

“All areas of risk in relation to tower crane safety procedures must be identified, assessed and mitigated so that our customers are not exposed to that risk.”

Crane & Hoist Equipment Brenden Crous Tel: 083-424-2658 Email: brenden@che-sa.co.za www.che-sa.co.za

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Safe lifting plans are key to a safe work area

October 2019

MARKET FORUM

An MRI for bridges Dynamic Infrastructure is implementing the world's first deeplearning solution which allows bridge and tunnel owners and operators to obtain visual diagnosis of the assets they manage. The system provides live, cloud-based, 3D views of the bridge or tunnel and automatically alerts when changes are detected in maintenance and operation conditions, before the issues evolve into large-scale failures.

With huge Opex and Capex positive impact, Dynamic Infrastructure is already conducting projects in the US, Germany, Switzerland, Greece and Israel

changes in maintenance conditions. The diagnostics can be easily accessed through a web browser and can be instantly shared with peers and contractors to speed maintenance workflows and increase return on investment.

Dynamic Infrastructure Contact@diglobal.tech www.diglobal.tech

Dynamic Infrastructure quickly creates "medical records" for every bridge, tunnel and elevated highway, based on existing images taken through periodic condition inspections through the years, including images from smartphones, drones and laser scanning. The technology compares old and archived images to new ones, detecting maintenance and operation issues, defects and anomalies. Like a MRI for humans, the 3D "medical records" serve as the basis for the alerts on

Growing local manufacturing As South Africa looks to revitalise its manufacturing sector in the ongoing quest to create jobs, it could take more than a few salutary lessons from home-grown Andrew Mentis, trading as Mentis Sales.

Now the leading supplier of steel grating on the African continent, Andrew Mentis started as a precision engineering works in 1950.

“Our recipe for success today continues to build on the philosophy of our founder, which includes specialised engineering expertise, innovation, high-quality products and constant investment in the latest technologies,” says Lance Quinlan, national technical sales consultant at Andrew Mentis.

The company’s unique Rectagrid grating, which it began manufacturing in 1967, remains the leading grating in South Africa, despite other manufacturers now replicating the design. As early as the 1970s, the company invested R1 million

Expanded metal has fast become a popular material for securing individual areas within all types of facilities.

in specialised Austrian-built equipment to achieve the quality it sought, giving the business the world’s most modern fusion-welding equipment for grating.

Andrew Mentis Tel: (011) 255-3200 Email: sales@mentis.co.za www.mentis.co.za

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MARKET FORUM

Entirely modular FLSmidth has launched the new Hybrid Apron Belt (HAB) Feeder for run-of-mine and stockyard applications. A modular, hybrid, belt-over-apron feeder, the HAB feeder delivers the strength of an apron feeder with the spillage control of a conveyor system.

The HAB feeder is a robust, power-efficient and high-tonnage hybrid belt-over-apron feeder that offers combined advantages of both apron and belt technologies. It provides a cost-effective solution for feeding abrasive materials, such as mineral sands, iron ore and bauxite, in mid-tier ROM applications and stockyard management operations.

The HAB feeder design incorporates a number of safety features, including a start-up alarm that is located behind the wing walls, an emergency stop on either side of the feeder, and an emergency bar at the feeder opening.

installed with minimal site preparation, anywhere near a stockpile. It is semimobile for simple onsite relocation or repositioning. Moving the feeder is as easy as dragging or pushing it with standard stockyard equipment.”

According to FLSmidth’s Manager of Capital Equipment, PC Kruger: “The HAB Feeder is specifically designed to feed abrasive materials at an adjustable rate onto conveyor belts and sizers. Because it is entirely modular, the feeder can be

FLSmidth PC Kruger Phone: 076 812 7610 Email: pc.kruger@flsmidth.com www.flsmidth.com

The low-profile loading deck easily accommodates different types of loading methods, including direct truck tipping, side tipping, front-end loading, dozing and ROM bypass tips, in order to prevent double handling. The feeder’s modular design allows for transportation within a standard-size container, simplifying freight solutions to remote locations around the world.

Modularity also allows for specific discharge heights, depending on the required application.

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Your boutique business destination Surrounded by lush gardens in the hub of Johannesburg’s northern suburbs, The Peartree in Craighall Park caters for groups of fifteen through to 100 guests in three well-appointed and equipped business suites.

Breakfast meetings, working lunches, indoor or outdoor dining, half-day and full-day packages including all welcome refreshments, teas and lunches are offered in Standard, Gold and Platinum packages.

Secure parking, Wi-fi, lockable space, all underpinned by highly qualified and helpful staff dedicated to ensuring your event is a success, make The Peartree a destination of choice.

www.thepeartree.co.za e-mail: info@thepeartree.co.za Tel: 011 781 1401 41 St. Albans Ave, Craighall Park

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