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Method for processing copperish electroplating sludge

A treatment method and copper electroplating technology are applied in the treatment field of copper-containing electroplating sludge, which can solve the problems of secondary pollution, easy accumulation and easy loss, and achieve the effects of short reaction time, simple process and high efficiency

Inactive Publication Date: 2014-04-02
李小华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] During the treatment of electroplating wastewater, the sludge produced contains harmful heavy metals. These harmful heavy metals are easy to accumulate, unstable, and easy to lose. If they are not properly treated and stacked randomly, they will cause serious secondary pollution.

Method used

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Embodiment Construction

[0006] The present invention is a treatment method for copper-containing electroplating sludge, comprising the following steps: a. adding dilute sulfuric acid to the copper-containing electroplating sludge at normal temperature, performing leaching, and then filtering to filter out the leached sludge and the filtered leachate Prepare for replacement. During this process, the copper in the electroplating sludge can easily enter the leaching solution in the form of copper ions; b. Add clean iron filings to the leaching solution. The iron filings should not be too broken, otherwise the excess iron filings cannot be combined with the copper powder Separate, stir after adding iron filings, then take out the unreacted iron filings, then filter to obtain sponge copper powder; c, because the sponge copper powder can contain a small amount of iron filings, so the sponge copper powder is put into dilute acid and soaked, Then filter to obtain copper powder.

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Abstract

The invention discloses a method for processing copperish electroplating sludge. The method comprises steps of a. adding dilute sulfuric acid into the copperish electroplating sludge for leaching, then filtering the leached sludge, reserving the leach liquor for replacement; b. adding scrap iron into the leach liquor, stirring, then taking out unreacted scrap iron, filtering so as to obtain copper sponge powder; c. putting the copper sponge powder into dilute acid and soaking, then filtering so as to obtain copper powder. The method has the characteristics of simple steps, short reaction time and high efficiency, the recovery rate of copper in the electroplating sludge reaches 95%, and secondary pollution rate to environment is lowered.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a treatment method for copper-containing electroplating sludge. Background technique [0002] During the treatment of electroplating wastewater, the sludge produced contains harmful heavy metals. These harmful heavy metals are easy to accumulate, unstable, and easy to lose. If they are not properly treated and stacked randomly, they will cause serious secondary pollution. Contents of the invention [0003] The object of the present invention is to overcome above-mentioned insufficient problem, a kind of treatment method of copper-containing electroplating sludge is provided. [0004] The technical solution adopted by the present invention for achieving the above object is: the treatment method of copper-containing electroplating sludge, comprising the following steps: a, adding dilute sulfuric acid in copper-containing electroplating sludge, leaching, then filtering, and filteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00
CPCY02P10/20
Inventor 李小华
Owner 李小华
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