All-wet process pretreatment method for copper anode mud

A copper anode slime and pretreatment technology, applied in the direction of improving process efficiency, can solve the problems of large copper anode slime processing capacity, reducing precious metal recovery rate, low production capacity, etc., achieving low pollution, reducing processing capacity and simple equipment. Effect

Inactive Publication Date: 2014-08-06
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These large amounts of barium, on the one hand, cause a large amount of copper anode slime to be processed in the whole process, and the production capacity is low. On the other hand, a large amount of valuable metals such as gold, silver, and tin are wrapped by barium, which reduces the recovery rate of precious metals.

Method used

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  • All-wet process pretreatment method for copper anode mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Copper anode slime is dried at 80°C for later use, and its main components are (%) by weight percentage: Au0.335, Ag8.64, Cu9.73, Se4.85, Te4.53, Pb12.36, As3.51 , Sb3.52, Ba12.33, Sn0.65.

[0024] Add 1.0L of concentrated sulfuric acid to 500g of copper anode slime, stir at 200°C for 50 minutes, and filter to obtain 1.1L of hot acid leaching solution and 298.5g of hot acid leaching residue.

[0025] The hot acid leaching residue was leached with a sodium hydroxide solution with a concentration of 150g / L, the liquid-solid ratio (sodium hydroxide: hot acid leaching residue) was 2:1, stirred at 60°C for 2 hours, and filtered to obtain 4.0L tellurium solution And 85.6g tellurium separation slag, the main components of tellurium separation liquid are (g / L): Te5.04, Pb14.21, As4.30, the leaching rates of tellurium, lead and arsenic are 89%, 92% and 98% respectively.

[0026] Dissolve the tellurium slag with HCl-NaCl solution, the HCl concentration is 2mol / L, the NaCl concen...

Embodiment 2

[0029] Copper anode slime is dried at 80°C for later use, and its main components are (%) by weight percentage: Au0.476, Ag10.85, Cu12.75, Se6.54, Te8.35, Pb16.76, As5.53 , Sb5.27, Ba15.45, Sn0.78.

[0030] Add 500g of copper anode slime to 1.2L of concentrated sulfuric acid, stir at 350°C for 20 minutes, and filter to obtain 1.25L of hot acid leaching solution and 492.3g of hot acid leaching residue.

[0031] The hot acid leaching slag was leached with a sodium hydroxide solution with a concentration of 160g / L, the liquid-solid ratio (sodium hydroxide: hot acid leaching slag) was 2:1, stirred at 70°C for 3 hours, and filtered to obtain 6.2L tellurium solution And 127.4g tellurium separation slag, the main components of tellurium separation liquid are (g / L): Te6.06, Pb12.57, As4.37, the leaching rates of tellurium, lead and arsenic are 90%, 93% and 98% respectively.

[0032] Dissolve the tellurium slag with HCl-NaCl solution, the HCl concentration is 3mol / L, the NaCl concentr...

Embodiment 3

[0035] Copper anode slime is dried at 80°C for later use, and its main components are (%) by weight percentage: Au0.585, Ag11.34, Cu12.45, Se7.38, Te8.95, Pb12.53, As5.74 , Sb5.77, Ba19.36, Sn0.92.

[0036] Add 0.9L of concentrated sulfuric acid to 500g of copper anode slime, stir at 500°C for 10 minutes, and filter to obtain 0.95L of hot acid leaching solution and 487.4g of hot acid leaching residue.

[0037] The hot acid leaching residue was leached with a sodium hydroxide solution with a concentration of 140g / L, the liquid-solid ratio (sodium hydroxide: hot acid leaching residue) was 2:1, stirred at 90°C for 3 hours, and filtered to obtain 6.9L tellurium solution And 143.5g tellurium separation slag, the main components of tellurium separation liquid are (g / L): Te6.03, Pb8.44, As4.08, the leaching rates of tellurium, lead and arsenic are 93%, 93% and 98% respectively.

[0038]Dissolve the tellurium slag with HCl-NaCl solution, the HCl concentration is 4mol / L, the NaCl conc...

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Abstract

The invention relates to a wet-process metallurgy technology in the metallurgical field and particularly relates to an all-wet process pretreatment method for copper anode mud. The all-wet process pretreatment method is as follows: firstly, carrying out hot acid leaching onto copper anode mud, leaching metals such as copper, selenium, sliver, barium, and the like and adding in liquor, leaving gold, tellurium, tin, platinum and platinum-family metals in leaching residue; by virtue of alkali leaching of hot acid leaching residue, leaching and enriching metals such as tellurium, lead, arsenic, and the like in liquor; carrying out chlorination on the obtained tellurium-separating residue for separating gold, enriching the gold, the platinum and the platinum-family metals in the liquor, enriching the tin and the antimony in residue; diluting the hot acid leaching liquor by water, enriching the copper and the selenium in diluted liquor, dissolving obtained precipitates by nitric acid, and filtering to obtain barium sulfate molten slag and sliver nitrate liquor. The all-wet process pretreatment method disclosed by the invention cancels a sulfating and roasting process which is high in energy consumption and great in pollution in the conventional copper anode mud treatment method, removes and openly recycles barium by the hot acid leaching before extracting the gold and the sliver, reduces treatment amount of the copper anode mud, and improves recovery rate of gold and sliver.

Description

technical field [0001] The invention relates to hydrometallurgy technology in the field of metallurgy, in particular to a full wet pretreatment method for copper anode slime. Background technique [0002] Copper anode slime is the product of blister copper electrolytic refining process, mainly containing gold, silver, platinum group metals, copper, selenium, tellurium, antimony, lead, tin, arsenic, barium and other metals, and is an important raw material for extracting precious metals. [0003] In order to extract the precious metals in copper anode slime, the base metals with higher content than the precious metals are often removed and recovered in advance, and then the gold and silver are extracted by fire or wet methods. There are many studies on pretreatment methods for removing impurities in copper anode slime, mainly including air oxidation decopper method, oxidation roasting method, sulfate roasting method, soda roasting method, pressurized oxidation leaching method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/08C22B3/12C22B11/06C22B25/06C22B30/02
CPCY02P10/20
Inventor 汪金良卢宏
Owner JIANGXI UNIV OF SCI & TECH
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