Method for separating copper and arsenic from black copper mud

A technology of black copper slime and rich copper, applied in the field of metallurgy, can solve problems such as low leaching rate, and achieve the effects of lowering leaching temperature, high efficiency and shortening leaching time

Inactive Publication Date: 2016-11-23
YANGGU XIANGGUANG COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, experts and researchers in the non-ferrous smelting industry have done a lot of research work on the black copper slime leaching process in the recycling process of black copper slime. The existing black copper slime leaching methods include acid leaching, alkaline leaching, acid- Alkaline combined leaching, etc. These black copper mud leaching methods have their own advantages, but their common disadvantage is that the leaching rate of Cu and As is low

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  • Method for separating copper and arsenic from black copper mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The black copper slime is filtered by a filter press and is used for later use. The components of the filtered black copper slime include: 44.25wt% Cu, 22.37wt% As, 0.98wt% Sb, 1.28wt% Bi and the rest of Fe.

[0043] Add 200 g of filtered black copper mud to the reactor, then add 1500 mL of sulfuric acid solution with a concentration of 1.5 mol / L to the reactor, keep the temperature of the reactor at 55 ° C, and add 30 wt % peroxide dropwise at a constant speed to the reactor. Hydrogen solution 180mL, during the dropwise addition, the mixing system in the reactor was stirred at a stirring rate of 350r / min. After 1.5 hours, the hydrogen peroxide was added dropwise, and the mixed system in the reactor was separated from solid and liquid to obtain 2000 mL of copper-arsenic-rich liquid and residue. The content of Cu in the copper-arsenic rich solution is 0.044g / mL, and the content of As is 0.02g / mL. From this, it can be calculated that the leaching rates of copper and arse...

Embodiment 2

[0047] The black copper slime is filtered by a filter press and then used for later use. The components of the filtered black copper slime include: 48.75wt% Cu, 25.03wt% As, 0.81wt% Sb, 1.69wt% Bi and the balance Fe.

[0048] Add 200 g of filtered black copper mud to the reactor, then add 1200 mL of sulfuric acid solution with a concentration of 2 mol / L to the reactor, keep the temperature of the reactor at 60 ° C, and add 30 wt % hydrogen peroxide dropwise to the reactor at a constant speed Solution 120mL, during the dropwise addition, the mixing system in the reactor was stirred, and the stirring rate was 400r / min. After 1 hour, the dropwise addition of hydrogen peroxide was completed, and the mixed system in the reactor was subjected to solid-liquid separation to obtain 1500 mL of a copper-arsenic-rich liquid and a residue. The Cu content in the copper-arsenic-rich solution is 0.064g / mL, and the As content is 0.0309g / mL. From this, it can be calculated that the leaching ra...

Embodiment 3

[0052] The black copper slime is filtered through a filter press and used for later use. The filtered black copper slime includes: 53.29wt% Cu, 26.07wt% As, 0.71wt% Sb, 1.38wt% Bi and the balance Fe.

[0053] Add 200 g of filtered black copper mud to the reactor, then add 1000 mL of sulfuric acid solution with a concentration of 2.5 mol / L to the reactor, keep the temperature of the reactor at 65 ° C, and add 30 wt % peroxide dropwise to the reactor at a constant speed. Hydrogen solution 150mL, during the dropwise addition, the mixing system in the reactor was stirred, and the stirring rate was 300r / min. After 2 hours, the hydrogen peroxide was added dropwise, and the mixed system in the reactor was separated into solid and liquid to obtain 1200 mL of copper-arsenic-rich liquid and residue. The content of Cu in the copper-arsenic rich solution is 0.088g / mL, and the content of As is 0.04g / mL. From this, it can be calculated that the leaching rates of copper and arsenic in this ...

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Abstract

The invention belongs to the field of metallurgy, and particularly relates to a method for separating copper and arsenic from black copper mud. The method comprises the following steps that (a1), the black copper mud is mixed with sulfuric acid, and a mixture composed of the black copper mud and the sulfuric acid is obtained; and (a2), hydrogen peroxide is added into the mixture for leaching, and copper-rich arsenic liquid is obtained after filtering, wherein the concentration of the hydrogen peroxide is 10-50 wt%, and the use ratio of the hydrogen peroxide to the black copper mud is 0.5-1 (L) : 1 (kg). According to the method for separating the copper and the arsenic from the black copper mud, the sulfuric acid and the hydrogen peroxide are used as a leaching reagent for the black copper mud, and the leaching rates of the copper and the arsenic in the black copper mud can be increased. Further, the leaching temperature is lowered, the leaching time is shortened, operation is simple and convenient, and the efficiency is high. According to experiment results, when the black copper mud is treated by adoption of the method provided by the invention, the leaching rate of the copper and the leaching rate of the arsenic can reach 98% and 89% correspondingly.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular to a method for separating copper and arsenic from black copper mud. Background technique [0002] During the copper electrolytic refining process, impurities such as As, Sb, and Bi will accumulate in the electrolyte, and the concentration of these impurities in the electrolyte will cause serious harm to the cathode copper if the concentration exceeds a certain limit. In order to ensure the normal progress of the electrolysis process, the electrolyte must be purified and adjusted. When the electrowinning of the electrolyte removes copper and removes impurities, impurities such as As, Sb, and Bi in the copper electrolyte will be precipitated on the cathode together with copper, and the mud (containing Cu, As, Sb, Bo, Pb, etc.) is called black copper mud. The traditional way of disposing of black copper slime is to directly return the black copper slime to the copper smelting system, but o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B30/04
CPCY02P10/20
Inventor 张煜陈迎武
Owner YANGGU XIANGGUANG COPPER
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