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Method for preparing copper powder by using copper removal final liquid

A technology for removing copper and copper powder, applied in the direction of improving process efficiency, can solve the problems of complex operation process and equipment, influence of cathode copper quality, low added value of products, etc., to reduce production costs, achieve significant economic and environmental benefits, The effect of work process safety

Inactive Publication Date: 2019-12-24
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the method of directly returning to the electrolytic system requires that the content of other impurity ions such as nickel in the decopper final solution be lower than the standard value, otherwise the direct return to use will affect the quality of cathode copper, so the scope of application of this method is limited
The operation process and equipment of the solvent extraction method are more complicated, and the cost is higher; the sulfidation precipitation method precipitates and separates copper under the condition of low pH value, and has high selectivity. The added value of the product is low

Method used

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  • Method for preparing copper powder by using copper removal final liquid
  • Method for preparing copper powder by using copper removal final liquid

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Embodiment 1

[0036] A method for preparing copper powder by using the copper-removing final solution. The copper-removing final solution is the solution obtained after part of the electrolytic raw solution that is diverted out during the process of copper electrolysis to produce cathode copper is purified and removed by arsenic, antimony, bismuth, and electrowinning. The content of copper ions in the copper final solution is 0.3-0.6g / L, and the content of free acid ions is 160-270g / L. It includes the following steps:

[0037] Step 1. Iron filings treatment: choose iron filings with bright luster and no slag, derust with dilute hydrochloric acid before use, wash with pure water, dry, and grind into powder with a particle size of 40-100 mesh;

[0038] Step 2. Replacement reaction: Measure 200ml of the final decopper solution and place it in a beaker, add acid solution or alkali solution to adjust the pH value of the final decopper solution to 4.5, and add the iron filings and iron chips afte...

Embodiment 2

[0044] A method for preparing copper powder by using the copper-removing final solution. The copper-removing final solution is the solution obtained after part of the electrolytic raw solution that is diverted out is purified, de-arsenic, antimony, bismuth, and electrodeposited and de-coppered during the process of copper electrolysis to produce cathode copper. The content of copper ions in the copper final solution is 0.3-0.6g / L, and the content of free acid ions is 160-270g / L. It includes the following steps:

[0045] Step 1. Iron filings treatment: select iron filings with bright luster and no slag, derust with dilute hydrochloric acid before use, wash with pure water, dry, and grind into powder with a particle size of 40-100 mesh;

[0046] Step 2. Replacement reaction: Measure 200ml of the final decopper solution and place it in a beaker, add acid solution or alkali solution to adjust the pH value of the final decopper solution to 5.5, and add the iron filings and iron chi...

Embodiment 3

[0052] A method for preparing copper powder by using the copper-removing final solution. The copper-removing final solution is the solution obtained after part of the electrolytic raw solution that is diverted out is purified, de-arsenic, antimony, bismuth, and electrodeposited and de-coppered during the process of copper electrolysis to produce cathode copper. The content of copper ions in the copper final solution is 0.3-0.6g / L, and the content of free acid ions is 160-270g / L. It includes the following steps:

[0053] Step 1. Iron filings treatment: select iron filings with bright luster and no slag, derust with dilute hydrochloric acid before use, wash with pure water, dry, and grind into powder with a particle size of 40-100 mesh;

[0054]Step 2. Replacement reaction: Measure 200ml of the final decopper solution and put it in a beaker, add acid solution or alkali solution to adjust the pH value of the final decopper solution to 6.5, and add the iron filings and iron chips ...

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Abstract

The invention discloses a method for preparing copper powder by using a copper removal final liquid. According to the method, the copper removal final liquid is a solution obtained through the steps that in the copper electrolysis producing cathode copper process, diverted partial electrolytic stock solution undergoes purification, arsenic removal, antimony removal, bismuth removal and electrodeposition copper removal, the method comprises scrap iron treatment and replacement reaction, specifically the copper removal final liquid is placed in a reactor, the pH value of the copper removal finalliquid is adjusted to 4.5-6.5, scrap iron is added to the copper removal final liquid in a stirring state, the molar ratio of the usage amount of the scrap iron and copper ions in the copper removalfinal liquid is 1:0.7-0.95, the reaction temperature and the stirring speed are controlled, stirring is stopped after the reaction is carried out for a certain time, standing and filtering are carriedout, filter residues are sponge copper, and the copper powder is obtained after vacuum drying of the sponge copper. According to the method, metal copper is directly replaced with residual copper ions in the copper removal final liquid through the scrap iron replacement method, the method is concise, efficient, low in cost and safe in operation process, the prepared copper powder is high in concentration, the production cost of an enterprise is effectively reduced, and the economic and environmental benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a method for preparing copper powder by utilizing the final decopper solution. Background technique [0002] The final solution of copper removal is the solution obtained after the part of the electrolytic raw solution that is diverted out during the process of copper electrolysis to produce cathode copper is purified and removed by arsenic, antimony, bismuth, and electrowinning. The content of copper ions in the final solution of copper removal is not very high, but If the processing volume of the final decopper solution is relatively large, for example, the electrolytic workshop of a copper company needs to process about 10,000 m³ of the final copper decopper solution every year. If all the copper in the decopper final solution is replaced with copper powder, copper can be produced every year. 3000-6000kg of copper powder is used for self-use, which can greatly reduce ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00B22F9/24
CPCB22F9/24C22B15/0091Y02P10/20
Inventor 王军余江鸿伍水生高颖王进龙张析吴斌周涛赵坤王源瑞李瓛万昕奇
Owner NORTHWEST RES INST OF MINING & METALLURGY INST