Spiral classifiers
Metso spiral classifiers Metso’s spiral classifiers are designed to provide the most effective pool area and overflow velocity requirements. By combining the proper submergence of the spiral with one of the tank designs a choice of 63 combinations is possible in straight, modified or full flare tank designs. The proper combination of pool depth, area and spiral construction is important to secure a controlled turbulence in the slurry flow for accurate size separation.
Features
Applications
• Adjustable weirs
• Separation of fine particles and liquid from coarse particles
• Sealed, submerged bearing • Optional automatic lubrication system • Rigid tank and substructure • Wide choice of tank design • Overflow collection box • Wide range of industries serviced
• Separation of light particles from heavy particles • Separation of the particles into a number of products graded according to size • Separation of liquid from solid particles
• Single spiral range from 300 mm to 2 200 mm • Duplex spiral models 1 500 mm and 2 200 mm
Benefits • Energy saving • Heavy duty, rugged construction • Powerful self-contained spiral lifting device • Continuous spiral raking • Optimal particle size range 800 to 75 microns 2 Spiral classifiers
Heavy duty rugged construction The tank is a rigid, well supported unit of continuous, welded construction. A minimum of intermediate foundation supports are required. Spirals are supplied in sizes from 300 mm up to 2200 mm diameter. Pre-formed, sectionalised steel flights from a continuous spiral helix. Available in single and double pitch configuration, single or duplex. Abrasion-resistant, replaceable shoes protect the working face of the flights from wear. Polyurethane shoes are standard. Chrome iron and Ni-hard are available as options.
Tank designs for optimal performance These classifiers are designed to provide the most effective pool area and overflow velocity requirements. By combining the proper submergence of the spiral with one of the tank designs a choice of 63 combinations is possible in straight, modified or full flare options.
Spiral classifiers 3
The proper combination of pool depth, area and spiral construction is important to secure a controlled turbulence in the slurry flow for accurate size separation.
Easy to operate and maintain The classifier spiral is easily raised for startups, shut-downs and periodic inspections or maintenance. For the smaller units, up to 900 mm diameter, a handwheel-operated screw device is standard. For the larger machines the spiral assembly is raised and lowered by an electromechanical lifting device.
The overflow weir, which varies the spiral submergence and pool area consists of removable weir bars located in a guide channel at the overflow end. The drive unit and the submersible bearing of the spiral, the two critical parts of the machine are designed for hard continuous operating conditions. An optimal lubrication system, automatic as option, is securing the function of these vital part. Service and maintenance of these parts and the wear parts of the spiral is simple to carry out.
• Metso Minerals (Sweden) AB Norrängsgatan 2, SE-733 38 Sala, Sweden, Phone: +46 224 374 00, Fax: +46 224 169 50
• Metso Minerals Industries, Inc. 2715 Pleasent Valley Road, York, PA 17402, USA, Phone: +1 717 843 8671
• Metso Minerals (South Africa) (Pty) Ltd. Private Bag X2006, Isando, Johannesburg,1600, South Africa, Phone: +27 11 961 4000, Fax: +27 11 397 2050
• Metso Minerals (Australia) Ltd. Level 2, 1110 Hay Street, West Perth, WA 6005, Australia, Phone: +61 8 9420 5555, Fax: +61 8 9320 2500
• Metso Minerals (India) Pvt Ltd 1th floor, DLF Building No. 10, Tower A, DLF Cyber City, Phase - III, Gurgaon - 122 002, India, Phone: +91 124 235 1541, Fax: +91 124 235 1601
• Metso Perú S.A. Calle 5 Nro. 144, Urb. Industrial Vulcano, Ate, Lima 03, Peru, Phone: +51 1 313 4366, Fax: +51 1 349 0913
• Metso Minerals (Chile) S.A. Av. Los Conquistadores 2758, - Piso 3, Providencia, Santiago, Chile, Phone: +56 2 370 2000, Fax: +56 2 370 2039
• Metso Brasil Indústria e Comércio Ltda. Av. Independência, 2500 Éden, 18087-101 Sorocaba-SP - Brazil, Phone: +55 15 2102 1300
www.metso.com E-mail: minerals.info@metso.com
Metso Corporation, Fabianinkatu 9 A, P.O. Box 1220, FI-00101 Helsinki, Finland, tel. +358 20 484 100, fax +358 20 484 101, www.metso.com Subject to alteration without prior notice
Brochure No. 1193-12-11-ESBL/Sala-English
© 2011 Metso Minerals
Printed in Sweden