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Method for recovering copper and nickel from electroplating sludge

A technology for electroplating sludge and copper recovery, applied in the direction of improving process efficiency, can solve problems such as environmental pollution and waste of non-ferrous metal resources, and achieve the effects of reducing production costs, reducing acid and alkali consumption, and overcoming complex processes

Inactive Publication Date: 2018-03-06
武汉嘉讯源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the sludge is discharged directly without strict treatment, on the one hand, it will cause a serious waste of non-ferrous metal resources; on the other hand, heavy metal ions or harmful components in the sludge will continue to migrate and enrich in the ecosystem, resulting in serious environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix the electroplating sludge with ammonia nitrogen concentration of 8mol / L and the leaching agent with the ammonia ammonium ratio of 1:2 according to the solid-to-liquid ratio of 1:4 and put them into a flat-bottomed flask. Put the flask in, adjust the stirring speed, set the leaching time to 4h, and collect the leaching solution after the reaction is completed. The collected leachate was adjusted to pH 9.5, then mixed with Lix984 and shaken for 5 minutes. Its recovery rate of copper is 69.3%, and the recovery rate of nickel is 0.18%.

Embodiment 2

[0020] Mix the leaching agent with the concentration of electroplating sludge and ammonia nitrogen at 9mol / L and the ratio of ammonia to ammonium at 1:2 and put it into a flat-bottomed flask at a solid-to-liquid ratio of 1:4. After the water bath magnetic stirrer reaches the preset temperature of 70°C Put the flask in, adjust the stirring speed, set the leaching time to 4h, and collect the leaching solution after the reaction is completed. Adjust the pH value of the collected leachate to 9.5, then mix it with Lix984, shake it for 5 minutes, and then carry out the second-stage extraction. Its copper recovery rate is 89.3% and nickel recovery rate is 5.2%.

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PUM

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Abstract

The invention discloses a method for recovering copper and nickel from an electroplating sludge. The method mainly comprises the following steps: 1) leaching the electroplating sludge with ammonia, putting the electroplating sludge and a leaching agent into a florence flask at the set ratio, putting the flask into a water bath magnetic stirring apparatus after the water bath magnetic stirring apparatus reaches the preset temperature, stirring and reacting for a certain period of time at certain revolving speed; 2) separating the copper and the nickel through a solvent extracting method, regulating the pH value of a collected leaching solution of the electroplating sludge, mixing with an extracting agent, oscillating for a certain period of time, and separating after the mixture is static.The method has the advantages that: the electroplating sludge is leached through ammonia, the zero emission of the leaching agent of an ammoniacal solution is reached by utilizing the closed cycle system of the leaching agent, the consumption of acids and bases in the production process is reduced, and the production cost is lowered. Meanwhile, the ammoniacal leaching solution is extracted and separated through the full solvent, so that the copper and the nickel in the ammoniacal leaching solution of the electroplating sludge are further extracted and separated, and the defect of the complex procedure of the traditional acid process is overcome.

Description

technical field [0001] The invention belongs to the field of environmental chemistry and electroplating sludge treatment, and more specifically relates to a method for recovering copper and nickel in electroplating sludge by combining ammonia method and solvent extraction method. Background technique [0002] As a resource-intensive industry, non-ferrous metal smelting has a direct impact on the size of mineral resource reserves and the level of development. With the vigorous development of world industry, the demand for non-ferrous metal raw materials in various industries is increasing day by day. Due to the non-renewability of mineral resources, the contradiction between the production of mineral metals and the demand for metals is increasingly intensified. Therefore, how to rationally and efficiently utilize secondary metal resources and realize the sustainable development of non-ferrous metals to meet human needs is of great significance. [0003] As a secondary resour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B23/00C22B3/30C22B3/26
CPCC22B7/008C22B15/0078C22B23/0446C22B3/30C22B3/306Y02P10/20
Inventor 阴艳华
Owner 武汉嘉讯源科技有限公司