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Method for separating copper, bismuth and arsenic in high-acid waste liquor generated by copper anode slime treatment

A technology for separating copper anode slime and arsenic, which is applied in the intersection of metallurgical engineering and environmental engineering, can solve problems such as difficulty in separating copper, bismuth, and arsenic, and achieve the effect of being beneficial to subsequent treatment, efficient separation and recovery, and reducing treatment procedures.

Active Publication Date: 2016-05-04
CHANGSHA SCI ENVIRONMENTAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of difficult separation of copper, bismuth and arsenic in the high-acid waste liquid for cleaning flue gas from copper anode slime treatment, the present invention provides a method for separating copper, bismuth and arsenic in the high-acid waste liquid produced by copper anode slime treatment

Method used

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  • Method for separating copper, bismuth and arsenic in high-acid waste liquor generated by copper anode slime treatment
  • Method for separating copper, bismuth and arsenic in high-acid waste liquor generated by copper anode slime treatment
  • Method for separating copper, bismuth and arsenic in high-acid waste liquor generated by copper anode slime treatment

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Effect test

Embodiment 1

[0024] Take 500ml of high-acid waste liquid from the anode slime treatment of a copper smelter, H + The concentration is 4.0mol / L, other main elements and contents are as follows:

[0025] Table 1 Main elements and concentrations of high-acid waste liquid produced by anode slime treatment (g / L)

[0026]

[0027] Take the above high-acid waste liquid and add sodium carbonate to neutralize and hydrolyze to recover bismuth, control the pH value to 3.0, the reaction temperature is 50°C, and the reaction time is 30min. Oxybismuth slag, the content of bismuth in the slag is 67%, the content of bismuth in the filtrate is 20mg / L, and the recovery rate of bismuth is greater than 99%. Add arsenic sulfide slag to the solution after bismuth precipitation according to the As / Cu measurement ratio of 1.2:1, and react for 30 minutes to obtain high-grade copper sulfide slag with a copper content of 50%. The copper in the filtrate is less than 5mg / L. According to the S / As measurement ratio ...

Embodiment 2

[0029] Take 500ml of high-acid waste liquid from the anode slime treatment of a copper smelter, H + The concentration is 4.2mol / L, other main elements and contents are as follows:

[0030] Table 2 Main elements and concentration of high-acid waste liquid produced by anode slime treatment (g / L)

[0031]

[0032] Take the above-mentioned high-acid waste liquid and add sodium carbonate to carry out neutralization and hydrolysis to recover bismuth, control the pH value to 3.0, the reaction temperature is 40°C, and the reaction time is 60min. Solid-liquid separation recovers bismuth oxychloride slag. The content of bismuth is 22mg / L, and the recovery rate of bismuth is greater than 99%. Add arsenic sulfide slag to the solution after bismuth precipitation according to the As / Cu measurement ratio of 1.3:1, and react for 60 minutes to obtain high-grade copper sulfide slag with a copper content of 51.3%. The copper in the filtrate is less than 5mg / L, and according to the S / As measu...

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Abstract

The invention discloses a method for separating copper, bismuth and arsenic in high-acid waste liquor generated by copper anode slime treatment. The method mainly includes the following steps of (1) recycling bismuth chloro oxide through neutralizing hydrolysis, (2) carrying out copper-arsenic separation after sulfide slag flows back so as to recycle copper, (3) carrying out efficient sulfuration to deeply remove the arsenic and obtain arsenic slag, and (4) carrying out deep treatment. By means of the method, efficient separation and deep recycling of the copper, the bismuth and the arsenic in the high-acid waste liquor are achieved, resource recovery of valuable elements and removal of the harmful element arsenic are achieved, operation cost is reduced, and environmental risks are lowered.

Description

technical field [0001] The invention belongs to the cross field of metallurgical engineering and environmental engineering, and in particular relates to a method for separating copper, bismuth and arsenic from high-acid waste liquid produced in the process of recycling copper anode slime. Background technique [0002] In the process of copper smelting, a certain amount of insoluble matter is produced during electrolytic refining, which is copper anode slime. Copper anode slime has a high content of copper and arsenic, and also contains a large amount of valuable metals. It is an important raw material for extracting precious metals such as gold, silver and platinum. At present, the vast majority of smelting enterprises use the high-temperature fire roasting process to extract the precious metals in the anode slime. Therefore, a large amount of smelting flue gas is produced in the fire process, and the flue gas is washed and purified to form a washing high-acid waste liquid. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B30/06C22B30/04C22B15/00
CPCC22B7/007C22B15/0089C22B30/04C22B30/06Y02P10/20
Inventor 蒋国民柴立元王庆伟闵小波胡明杨志辉高伟荣
Owner CHANGSHA SCI ENVIRONMENTAL TECH
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