copper leaching plant Mining Mixing Equipment Agitation Tank for Mineral Leaching Plant
We manufacture small to medium scale Merrill Crowe Zinc Precipitation Plants for the recovery of gold and silver, Gold CIP & CIL plant, gold ore flotation processing plant, and other processing technology according to different ores.
Gold Leaching( carbon in leach) was developed from CIP( Carbon In Pulp), is characterized by less process flow, timesaver in the leaching process, thus reducing the production expenditure. Besides, advanced extraction technology improving the efficiency of gold extraction. The CIL production line is wider use than CIP in the mineral industry.
Introduction of gold CIL processing:
The ore after grinding is fed to agritation and leaching tanks of cyanide solution, where the gold is dissolved in the cyanide. The pregnant solution is then transferred to a series of tanks, where carbon is added. The gold is adsorbed onto the surface of the carbon. The carbon, with gold attached, is removed by screening. The gold bearing carbon is then introduced into a heated sodium hydroxide-cyanide-water solution where the gold is dissovled. This concentrated solution is passed through a series of electrowinning cells, where the gold quickly plates (in about 3 minutes) onto the stainless steel cathodes. The gold is washed from the cathodes, with high pressure sprays, dried and melted, to be poured into molds for gold bricks, or ingots.
General production process:
Crushing, Screening Process
The raw ore is fed into the primary crusher by a vibrating feeder, and then into the secondary crusher by a belt conveyor. The crushed ore is sent to the vibrating screen for sorting, the ore under the screen is sent to the powder silo, and the ore above the screen is sent to the third crusher by a belt conveyor for re-crushing. The crushed ore is then sent to the screening machine for sorting, which is a three-stage one-closed-loop crushing flow chart.
Grinding, Classification Process
The raw material from the powder silo is sent to the first ball mill through the feeder and belt conveyor. The ball mill discharges to the spiral classifier, and the slurry with larger particle size is returned for re-grinding. The overflow is pumped to the hydrocyclone for the second classifier, and the slurry with larger particle size enters the second ball mill, and the discharge returns to the second classifier. This is a two-step two-closed-loop grinding flow chart. The overflow of the
hydrocyclone is sent to the slag screen and thickener.
Concentration
After dewatering and thickening by thickener, overflow pulp density of the classifier will be adjusted to the required concentration of the leaching reaction (40%), and to ensure uniform leaching process, continuous feeding.
Leaching And Adsorption
Concentrated pulp by thickener fed to the leaching tank by slurry pump, adding sodium cyanide stirred 20-24 hours. Gold with cyanide to form gold cyanide complexes, gold-cyanide complex is adsorpted by activated carbon, gold loaded carbon is formed, when carbon reaches a certain grade gold, with air lifter gold loaded carbon will mention to carbon lifting sieve to dewatering, and transported to desorption electrolysis systems by pump.
Desorption And Electrowinning
Desorption solution through heating delivered to the analytical column which loaded gold loader carbon, the desorption column will be temperatured, pressured, the gold precipitated from carbon. After desorbed, the bare carbon returned to the leach adsorption section.
After desorption, the gold contained pregnant solution come into electrowinning cell, get gold powder, electrolysis lean solution
can be returned for elution.
Different capacity of Desorption electrolysis system equipment:
|
Model |
Suitable size |
Operating parameter |
|
Mine scale(t/d) |
Crudes quality(g/t) |
|
GKJD-200 |
<150 |
2--8 |
Temperature:150±2OC
(Na0H)PH:≥13.5
Desorption pressure tank:0.5(Mpa)
Electrolytic tank pressure:0.45(Mpa) |
|
GKJD-300 |
150-300 |
2--8 |
|
GKJD-500 |
300-500 |
2--8 |
|
GKJD-700 |
300-500 |
2--8 |
|
GKJD-1000 |
500-1000 |
2--8 |
|
GKJD-1500 |
500-1000 |
2--8 |
|
GKJD-2000 |
1000-2000 |
2--20 |
|
GKJD-2500 |
1000-2000 |
2--20 |
|
GKJD-3000 |
1000-2000 |
2--20 |
|
GKJD-3500 |
2000-3000 |
2--20 |
|
GKJD-4000 |
2000-3000 |
2--20 |
|
GKJD-5000 |
2000-3000 |
2--20 |
|
GKJD-8000 |
3000-5000 |
2--20 |
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