Method for processing copper anode slime in total wet manner

A copper anode slime, full wet process technology, applied in the improvement of process efficiency, element selenium/tellurium, etc., can solve the problems of pollution, recovery and low enrichment, achieve high metal separation and recovery rate, optimize operation process, The effect of short work cycle

Active Publication Date: 2013-03-13
JIANGXI COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the two processes, the pollution problem of the essential sulfuration, roasting and selenium distillation process is always a chronic problem that ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add copper anode slime containing 12.4% copper, 3.8% antimony, 2.76% bismuth, 6.09% selenium, 3.95% tellurium, 3886g / t gold, and 7.97% silver to the autoclave, and control the concentration of sulfuric acid to 80g / l for leaching. The ion concentration is 90g / l, the temperature is 100°C, the pressure is 0.7MPa, and the liquid-solid ratio is 5:1; copper, antimony, bismuth, tellurium, and tin enter the leaching solution in an ion state;

[0017] The liquid-solid ratio of the leaching residue is controlled at 5:1, the concentration of sulfuric acid is 80g / l, the concentration of NaCl is 80g / l, and the gold-selenide is chlorinated at 90°C;

[0018] Gold slag in 180g / l Na 2 SO 3 In the medium, control the liquid-solid ratio of 7:1 to leach silver.

[0019] Results The recovery rates of gold, silver and copper were >99%, and the recovery rates of antimony, bismuth, tellurium and tin were 90-95%.

Embodiment 2

[0021] Treat copper anode slime with 11.2% copper, 3.7% antimony, 2.61% bismuth, 6.72% selenium, 2.5% tellurium, 4875g / t gold, and 6.8% silver. Pressure leaching controls the concentration of sulfuric acid to 100g / l and the concentration of chloride ions to 110g / l, temperature 170°C, pressure 1.5Mpa, liquid-solid ratio 4:1; copper, antimony, bismuth, tellurium, and tin enter the leaching solution in ionic state;

[0022] The liquid-solid ratio of the leaching slag is controlled to be 3:1, the concentration of sulfuric acid is 75g / l, the concentration of NaCl is 90g / l, and the temperature is 75°C for chlorination and separation of gold and selenium; 2 SO 3 In the solution, control the liquid-solid ratio of 8:1 to leach silver.

[0023] Results The recovery rates of gold, silver and copper were >99%, and the recovery rates of antimony, bismuth, tellurium and tin were 90-95%.

Embodiment 3

[0025] Treat copper anode slime with 10.3% copper, 7.2% antimony, 4.3% bismuth, 5.8% selenium, 2.98% tellurium, 4325g / t gold, and 8.16% silver. Pressure leaching controls sulfuric acid concentration to 200g / l and chloride ion concentration to 80g / l , temperature 150°C, pressure 0.5-1.6Mpa; liquid-solid ratio 3:1; copper, antimony, bismuth, tellurium, and tin enter the leaching solution in ionic state;

[0026] The liquid-solid ratio of the leaching slag is controlled at 5:1, the concentration of sulfuric acid is 100g / l, the concentration of NaCl is 120g / l, and the temperature is 65°C to carry out chlorination and separation of gold and selenium; 2 SO 3 In the solution, control the liquid-solid ratio of 3:1 to leach silver. Results The recovery rates of gold, silver and copper were >99%, and the recovery rates of antimony, bismuth, tellurium and tin were 90-95%.

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Abstract

The invention discloses a method for processing copper anode slime in a total wet manner, relating to a total wet production process for recycling rare and precious metals from the copper anode slime in nonferrous metallurgy. The method comprises the steps of pressurizing the copper anode slime by a chloride medium at a high temperature and leaching to directly separate out valuable metals such as copper, stibium, bismuth, tellurium, and tin; and recycling tellurium, stibium, tin, bismuth, copper and the like from a pressurized lixivium in stages. The method is further characterized in that a selective extraction method is adopted to separate gold in a gold selenium chloride solution and the selenium is recycled from a gold raffinate. According to the method, the sulfating roasting with serious pollution and huge investment is avoided, but the sulfating roasting is carried out firstly for the copper anode slime in the conventional wet method or (pyrometallurgical process); the separation recovery rate of the metals is high, but the separation effect of tellurium, stibium, tin and bismuth in the conventional process is far from ideal; by adopting the method, the leaching problems of above metals can be solved in a single process and above metals can be recycled respectively from the lixivium; the recovery rate of the metals is 90-99% respectively; the copper separation and the tellurium separation can be simplified; and the operation flow is optimized in a better manner.

Description

[0001] technical field [0002] The invention relates to a method for treating copper anode slime by a full wet method, which relates to a full wet production process for recycling rare and precious metals in copper anode slime in a nonferrous metallurgical process, in particular to a method for treating copper anode slime and lead anode slime. Background technique [0003] The conventional semi-wet copper anode slime treatment process adopts sulfuration roasting to distill selenium, distilled selenium slag water leaching copper or dilute sulfuric acid leaching copper; decopper leaching slag sent to alkali leaching to separate tellurium; Then send sodium nitrate silver. Conventional pyrotechnics process is that after sulphating, roasting and distilling selenium, the roasted and distilled selenium slag is sent to separate copper or directly to precious lead furnace for smelting to produce gold-silver alloy plate; the alloy plate is sent to gold electrolysis to obtain electrol...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/26C22B11/00C22B7/00C01B19/02
CPCY02P10/20
Inventor 赵向民赖建林黄绍勇王日陈善文周宇飞黄冰夏彬饶红
Owner JIANGXI COPPER
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