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Method for extracting and separating copper, chromium and nickel from acid leaching solution

A separation method and solution technology, applied in the field of copper in the acid leaching solution of electroplating sludge containing copper, nickel, chromium and nickel components, can solve the problem of harmless disposal of unfavorable chromium, efficient recovery and resource utilization, and large-scale application separation The effect is not ideal, there is no large-scale industrial application, etc., to achieve the effect of ideal effect, low cost and significant economic benefits

Inactive Publication Date: 2013-05-01
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] There are not many research results on the efficient separation of copper, chromium, and nickel under acidic conditions, and the separation effect of large-scale application is not satisfactory. There is a lack of economical and applicable technology to support industrial application, and there is currently no report on large-scale industrial application.
This is also one of the technical problems that have always plagued the recycling of secondary resources such as copper, chromium and nickel electroplating sludge, which is not conducive to the harmless disposal of chromium and the efficient recovery and resource utilization of valuable components metal copper, chromium and nickel

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  • Method for extracting and separating copper, chromium and nickel from acid leaching solution

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Embodiment 1

[0031] After the electroplating sludge containing copper, chromium and nickel was leached with sulfuric acid, the content of Cu in the solution was 4.8g / L, the content of Cr was 4.8g / L, the content of Ni was 2.9g / L, and the pH value of the solution was 0.5. 20% (v / v) LIX984N was used as the extractant to extract copper, kerosene was used as the diluent, compared with O / A=1, the stirring time was 5 minutes at room temperature, and two-stage extraction was carried out. For the organic phase, sulfuric acid with a concentration of 10 g / L was used as the detergent, compared with O / A=2, and the stirring time was 5 minutes at room temperature for primary washing. After washing, the loaded organic phase uses sulfuric acid with a concentration of 180 g / L as the stripping agent. Compared with O / A=1, the stirring time at room temperature is 5 minutes, and a primary stripping is carried out. The stripping solution obtains copper sulfate, and the copper sulfate is first realized. Separate ...

Embodiment 2

[0034] After the electroplating sludge containing copper, chromium and nickel was leached with sulfuric acid, the Cu content in the solution was 13.5 g / L, the Cr content was 8.0 g / L, the Ni content was 5.2 g / L, and the pH value of the solution was 1.0. 30% (v / v) LIX984N was used as the extractant to extract copper, kerosene was used as the diluent, compared with O / A=1, the stirring time was 5 minutes at room temperature, and three-stage extraction was carried out. For the organic phase, sulfuric acid with a concentration of 10 g / L was used as the detergent, compared with O / A=2, and the stirring time was 10 min at room temperature for primary washing. After washing, the loaded organic phase uses sulfuric acid with a concentration of 200 g / L as the stripping agent. Compared with O / A=1, the stirring time at room temperature is 5 minutes, and a primary stripping is carried out. The stripping solution obtains copper sulfate, and the copper sulfate is first realized. Separate and ex...

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Abstract

The invention discloses a method for extracting and separating copper, chromium and nickel from an acid leaching solution, and relates to a method for separating copper, chromium and nickel from the acid leaching solution containing copper, chromium and nickel resources during a hydrometallurgy process. The technological process of the method comprises the following steps in sequence: (1) adding an extraction agent to the acid leaching solution to extract copper; (2) adding sulfuric acid to an organic phase with copper extracted to separate the copper by reverse extraction; (3) After a raffinate phase with copper extracted is unoiled, adding soluble phosphate to perform chromium sinking reaction by phosphoric acid; and (4) performing filtering separation to obtain chromic phosphate and chromic hydroxide compound precipitate and nickeliferous filtrate. The method provided by the invention is simple in technological operation, is short in flow and low in cost, has strong selectivity in a wider metal ion concentration range, achieve an ideal separating effect in copper, chromium and nickel, and has a remarkable economic benefit as copper recovery rate is greater than 99% and recovery rates of both chromium and nickel are greater than 98%; and moreover, the phosphate precipitator is recyclable and the production process is free of secondary pollution.

Description

technical field [0001] A method for extracting and separating copper, chromium and nickel in an acid leaching solution, which relates to an acid leaching solution containing copper, chromium and nickel resources in a hydrometallurgical process, especially in an acid leaching solution containing copper, chromium and nickel components of electroplating sludge Copper, chromium, nickel separation method. Background technique [0002] During the hydrometallurgical process, an acid leaching solution containing copper, chromium, and nickel is produced. There have been more systematic studies on the separation and extraction of copper and nickel in the solution, and there are many applications. Common separation methods include extraction separation (P204, P507 for nickel extraction or M5640, LIX984, N902 for copper extraction), sulfide precipitation for copper Separation method, alkali precipitation nickel separation method, etc. [0003] At present, the metal separation methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/46C22B7/00C22B15/00C22B23/00C22B34/32
CPCY02P10/20
Inventor 王成彦袁文辉徐志峰月日辉揭晓武杨卜
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY