Electroplating sludge resource recovery process

A technology for electroplating sludge and recycling, which can be used in sludge treatment, process efficiency improvement, water/sludge/sewage treatment, etc. It can solve problems such as environmental pollution, achieve a wide range of applications, and overcome the effect of limited application range.

Inactive Publication Date: 2012-11-21
HENGFENG COUNTY YUANSHENG METAL RESOURCE RECYCLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a resource recovery process for electroplating sludge, through which the copper, nickel and zinc metals in the electroplating sludge

Method used

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Examples

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Embodiment Construction

[0009] The resource recovery process of electroplating sludge of the present invention is: acid dissolution→purification→copper deposition→purification to remove zinc and precipitate nickel; 1. acid dissolution: use nickel and copper-containing deplating solution and sulfuric acid solution as acid for leaching, The raw materials containing nickel and copper in the electroplating sludge are in the form of metal oxides or hydroxides. The deplating solution and electroplating sludge are placed in the leaching tank, and the metal in the electroplating sludge enters the leaching solution as ions after being dissolved by acid. , Nickel and copper-containing electroplating sludge is leached at room temperature. The PH value of the leaching end point is 1.5. If the PH value is too high or too low, adjust with raw materials. If the pH value is too low, it is not conducive to the subsequent purification process. If the pH value is too high, it will reduce nickel. , Copper leaching rate; t...

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PUM

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Abstract

The invention discloses an electroplating sludge resource recovery process. After acid solution, purification, copper precipitation and purification, dezincification and nickel precipitation, Cu(OH)2, Zn(OH)2 and Ni(OH)2 are obtained. The application range of the zinc hydroxide and the nickel hydroxide produced by the process technology disclosed by the invention is wider, and therefore the electroplating sludge resource recovery process overcomes the defect that the application range of nickel sulfate is limited.

Description

Technical field [0001] The invention relates to a resource recovery process for electroplating sludge. Background technique [0002] "Non-Ferrous Metal Industry" (2000, Issue 12, pages 45-47) published: "Experimental research on the extraction of copper and nickel sulfate from electroplating sludge", the process mainly includes leaching, replacement, purification, and production of sulfuric acid 5 parts of nickel and curing treatment. Use dilute sulfuric acid for leaching and replacement of iron filings. The purification process is carried out step by step; the first step is to add an appropriate amount of Na 2 S; In the second step, add sodium chlorate and sodium carbonate solution to control the PH value; in the third step, adjust with NaOH solution, add an appropriate amount of NaF, and finally filter to separate the purification liquid and the purification residue. Add appropriate amount of Na during purification 2 S can remove zinc ions and copper ions in the solution, and...

Claims

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Application Information

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IPC IPC(8): C02F11/00C22B7/00C22B15/00C22B19/30C22B23/00C02F103/16
CPCY02P10/20
Inventor 周小明王翔胤
Owner HENGFENG COUNTY YUANSHENG METAL RESOURCE RECYCLE
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