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