National Cooperative of Artisanal and Industrial Gold Prospectors of South Sudan
GOLD ORE DIRECT LEACHING CIRCUIT Ore processing site
The hopper of 7 m3 with the tray feeder
Crushing 1 Jaw crusher ЩДП-2,5х9
0-40 mm 20t/h Impact-centrifugal crusher ДЦ-1,0
5-40mm 40 t/h 0-40 мм, 60 т/ч
Unbalanced-throw screen ГИС-41
0-5 mm 20 t/h The storage hopper of 20 m3 with the belt feeder 0-5 mm 20 t/h
Grinding complex КИ-1,6
Silo 30 m3
Crushed ore 0-0,1 mm 20 t/h is directed for cyanide procedures
Source material 0-200 mm, 20 t/h
The plant for the preparation of reagent solutions Department for the preparation of milk of lime
Department for the preparation of sodium cyanide solution
Lime
Sodium cyanide NaCN
1 Storage hopper 2 Storage agitation tank 3 Pump Device to open and empty the barrels with NaCN (Andreyev’s apparatus)
1
Н2О
Supply tank Н2О Milk of lime (CaO+Н2О) 10% solution of cyanide (NaCN+Н2О) 3 2
Tank to dissolve sodium cyanide
Crushed ore 0-0,1 mm; 20 t/h; Gold concentration: 5 g/t
Н2О
Agitation tank
(pachuka)
Pulp S:L=1:1,5 37,4 m3/h
High-speed screen mesh 0,63 х 0,63
10% solution of cyanide (NaCN+Н2О), Milk of lime (CaO+Н2О) to produce рН=10-11
Tanks for preliminary cyanidation The period of procedure: 2 hours
рН=10-11
Время прохождения: 2 часа. Pulp S:L=1:1,5 37,41 m3/h
Sorbent: activated carbon (85% - regenerated, 15% - fresh), It is fed towards the pulp. The averaged consumption is 70 kg/h (0,11 m3/h)
CIL process tanks The period of procedure: 6 hours
To cyanide procedure
Solution return to desorption
Н2О
High-speed screen mesh 0,63 х 0,63 mm
Carbon to reactivation 70 kg/h - losses
Resin 0,11 m3/h Water solution
NaCN – 0,1% NaOH – 1% Eluate 0,11 m3/h
3-5% solution of HCl
Frame filter press
Column for washing with HCl (to remove calcium carbonate) 10 hours
Gold cathode
Н2О
Pulp to decontamination Frame filter press
To the tailing dump
3-5% solution of HCl
+1 spare column
Desorption (elution) column 60 hours
Electrolyzer
thickener
Pulp with sorbent
Column for washing out the sludge 10 hours
Regeneration division. It works once in 4 days. The capacity of the columns is 12 m3 Fluxing agents Calcium oxide: quartz sand: borax = 1:1,6:9,7
W=20-25%
Vacuum Nutchfilter
Resistance furnace 2-3 hours; T=400-500С
Electrolytic compartment works once in 4 days. Furnaces - once in 10-20 days. Печи раз в 10-20 суток
Induction furnace T=1200-1250С Melting time: 1,5-2 h Dore gold
Before being directed into the technological process carbon is moistened in the alkaline solution.
Carbon reactivation division
Fresh carbon Up to 15% (10 kg/h)
Carbon to reactivation 70 kg/h
Activated carbon 70 ะบg/h
Tube-type rotating furnace with electrical heating Unbalancedthrow screen
Off-grade carbon (up to 15%) It is stockpiled.
No. Auxiliary equipment 1 2 3 4 5 6 7 8 9 10 11
The equipment for storing, debagging, preparing and dosing the reagents Compressor plant Mechanical repair department Elevated water tank Fuel storage area Electric supply station Console room with the control system Assay laboratory Warehouses Motor vehicle garage The site for decontamination and cleaning
Sorbent bin
Quantity, pcs. 1 1 1 1 2 2 1 1 9 1 1