Electroplating sludge resource recovery process

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...

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 can be recycled to realize the value of recycling, thereby solving the problem of environmental pollution, Recycling of copper, nickel, and zinc can meet the needs of a wider range of uses