Industrial Test 2 for Separation of Arsenic from Gold-containing Flotation Concentrate by Vacuum Pyrolysis

November 01, 2022

The reason for the high arsenic content in the soot (see Table 2 ) is that the temperature of the hot dust collector is not enough (only 300 °C ). If the temperature of the dust collector is raised to 400 °C The amount of arsenic in soot can be reduced. These can then be combined in soot and slag - sent from the extraction of gold.

Table 2   Ingredients % of concentrate vacuum processing products

product

As

S

Fe

SiO 2

Al 2 O 3

CaO

MgO

C

Concentrate

6.20

15.10

16.60

24.70

8.80

0.40

0.40

18.60

Slag

0.20

14.20

19.20

29.10

-

0.50

0.50

22.50

Condensate

61.40

20.60

0.30

6.90

-

-

-

-

Smoke

7.30

12.50

13.60

23.70

6.90

-

-

-

During the vacuum heat treatment, 91.8~92% of the gold is transferred into the slag, 7.8~8% of the gold is transferred to the soot, and about 5% of the gold enters the condensate. About 6% of the silver lost with the condensate loss and balance error . Test electricity consumption of 300 to 350 kilowatts. Hr / ton of ore.

Based on the results obtained, the raw data of the industrial vibrating vacuum device design was compiled to separate arsenic from the gold-bearing concentrate by vacuum pyrolysis.

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