leaching-tank

leaching tank Application

Leaching agitaion tank is a leaching equipment for cyanide leaching by referring the USA technical design

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◆Advantages

•Entering leaching tank via hollow shaft, air is agitated and dispersed by rotation of impellers.
•The two new type impellers with large diameter, low speed and low power consumption, which can reduce the wear of carbon
•The moderate stirring intensity, pulp concentration and fineness distributes consistently can improve the adsorption rate and import rate.
◆Work Principle

With dual impellers rotating and agitating, ore pulps move downward and then diffuse along damping plate. Air is fed in tank from the lower end of shaft, and blended with ore pulps to form uniform suspending mixed liquid.

In the gold cyaniding process, leaching agitation tank is applied to leach and carbon-absorb ore pulps whose fineness is -200 meshes and whose density is less than 45%. Under similar circumstance, it is also applied to agitation and leaching in metallurgy, chemical and light industry.



Leaching Agitation Tank, which is widely use in Cyanidation processes may include the following operations:

1. Agitated tank leaching

2. Heap leaching

3. Carbon adsorption recovery

4. Zinc precipitation recovery

CYANIDATION

Cyanide leaching is the standard method used for recovering most of the gold
throughout the world today. The process originated around 1890 and quickly
replaced all competing technologies. The reason was strictly economical in
nature. Where amalgamation plants could recover about 60% of the gold present,
cyanide could recover about 90%. Because of the improved recovery, many of
the old tailings piles from other processes have been economically reprocessed
by cyanide leaching. Cyanide is as close to a “universal solvent” for gold
as has been developed. Other leaching reagents will only work on very specific
types of ore.

The standard cyanide leach process consists of grinding the ore to about
80% – 200 mesh, mixing the ore/water grinding slurry with about 2 pounds
per ton of sodium cyanide and enough quick lime to keep the pH of the solution
at about 11.0. At a slurry concentration of 50% solids, the slurry passes
through a series of agitated mixing tanks with a residence time of 24 hours.
The gold bearing liquid is then separated from the leached solids in thickener
tanks or vacuum filters, and the tailings are washed to remove gold and cyanide
prior to disposal. The separation and washing take place in a series of units
by a process referred to as counter current decantation (CCD). Gold is then
recovered from the pregnant solution by zinc precipitation and the solution
is recycled for reuse in leaching and grinding.



◆Technical Parameters



 

Model

Tank Specification
(D × H)
(mm)

Effective Volume
(m3)

Impeller Rotation Speed
(r.p.m)

Impeller Diameter
(mm)

Motor Power
(kw)

Model of Planetary Cycloid Reducer

Tank Weight
(kg)

Total Weight
(kg)

SJ2.0×2.5

2000×2500

6

52

909

2.2

XLD2.2-4-29

1609

2144

SJ2.5×2.5

2500×2500

9.82

43

935

4

XLD4-5-35

2159

2729

SJ2.5×3.15

2500×3150

13.14

52

935

2.2

XLD2.2-4-29

2398

3095

SJ3.0×3.0

3000×3000

18

40.85

1130

4

XLD4-5-35

3480

4583

SJ3×3.15

3000×3150

18.93

43

1130

4

XLD4-5-35

3480

4160.6

SJ3×3.5

3000×3500

21

43

1130

4

XLD4-5-35

3211

4334.6

SJ3.15×3.55

3150×3550

24

43

1260

4

XLD4-5-35

3433.5

4322.8

SJ3.5×3.5

3500×3500

30

52

1310

5.5

XLD5.5-5-29

3480

5025

SJ3.5×4

3500×4000

32.7

52

1310

5.5

XLD5.5-5-29

4230

5429

SJ3.55×4.0

3550×4000

33.6

43

1310

4

XLD4-5-35

4260

5025

SJ3.7×4.2

3700×4200

38.4

42

1310

4

XLD4-5-43

5266

6153

SJ4.0×4.5

4000×4500

48

35

1750

7.5

XLD7.5-7-43

6397

7569

SJ4.0×6

4000×6000

70

33

1750

11

GRF137-Y11-4P-44.65-M4

7681

9200

SJ4.5×5.0

4500×5000

71.57

35

1750

7.5

XLD7.5-7-43

8614

10864

SJ5.0×5.6

5000×5600

98

31

2046

11

XLD11-8-47

8740

14291

SJ5.5×6.0

5500×6000

112

31

2100

11

XLD11-8-47

14267

18745

SJ6.5×7.0

6500×7000

195

21

2400

22

GRF147-Y22-4P-70.87

17890

25978

SJ7.0×7.5

7000×7500

245.4

21

2400

22

XLD22-10-47

20505

29030

SJ7.5×8.0

7500×8000

268.6

23

2900

22

BLD7-43-22L

22552

32796

SJ8.0×8.5

8000×8500

319

18.5

3300

30

TPS315-3F

30559.5

42467.3

SJ8.5×9.0

8500×9000

395

18.5

3300

30

TPS315-3F

34130

46623

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