Resource recovery method of acidic copper-containing waste solution
A recovery method and resource recovery technology, which is applied in the field of resource recovery of acidic copper-containing waste liquid, can solve the problems of low recovery degree and large secondary pollution of the environment, and achieve the effect of improving the level of treatment technology
Active Publication Date: 2015-04-08
GUANGZHOU HKS SURFACE TREATMENT CO LTD
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[0005] In order to solve the technical problems of low recovery degree and large secondary pollution to the environment in existing recovery methods, the present invention provides a resource recovery method for acidic copper-containing waste liquid
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[0028] see figure 1 , the present invention adopts the method of membrane concentration-degradation-replacement-transformation to prepare composite polyaluminum sulfate, transforms heavy metal ions in waste liquid into high-purity sponge copper and composite polyaluminum sulfate, and realizes 100% recovery of low-copper-containing acidic wastewater and Utilization solves the problems existing in the resource recovery and treatment technology and equipment treatment of the existing acidic low-copper-containing waste liquid. The specific preparation method is as follows: the acidic copper plating washing water contains 2-5g / l copper and 1-3g / l sulfuric acid. First add a small amount of 30% liquid caustic soda to the solution to adjust the pH value of the solution to 4-5. The solution undergoes coarse filtration and fine filtration, is pumped into the reverse osmosis membrane treatment system, and is concentrated twice to produce fresh water and concentrated water. The copper ...
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The invention provides a resource recovery method of an acidic copper-containing waste solution. The method comprises: first adding a small amount of 30% liquid caustic soda into an acidic copper plating solution, and adjusting the pH value of the acidic copper plating solution to 2-5; then conducting coarse filtration and fine filtration on the pH value adjusted acidic copper plating solution, pumping the plating solution into a reverse osmosis membrane treatment system, and carrying out concentration so as to yield fresh water and concentrated water; then returning the yielded fresh water to a production workshop to serve as washing water; adding a Fenton reagent into the concentrated water to perform a Fenton reaction, and reducing the COD (chemical oxygen demand) of the concentrated solution to about 100ppm; pumping the reacted concentrated water into a replacement trough, adding waste aluminum sheets or aluminum scraps for a replacement reaction, yielding the copper in the acidic copper plating concentrated solution by means of high purity copper powder, and simultaneously bringing aluminum into the acidic copper plating solution to yield aluminum sulfate; performing aging and polymerization on the aluminum sulfate solution so as to obtain polyaluminum sulfate; and finally supplementing polyacrylamide into the polyaluminum sulfate solution, thus obtaining a composite aluminum sulfate solution. The method provided in the invention solves the problems of low recovery rate and secondary pollution in the prior art, and has the advantages of simple process, zero emission and zero pollution, etc.
Description
technical field [0001] The invention relates to the field of copper electroplating waste liquid treatment, in particular to a resource recycling method for acidic copper-containing waste liquid. Background technique [0002] The domestic treatment of copper-containing wastewater is mainly concentrated on high-concentration copper-containing waste liquid, while the acidic copper plating cleaning water produced in the industry, acidic cleaning water for copper plates of printed circuit boards, micro-etching waste liquid and washing water The research on waste liquids with low copper ion content is relatively limited. Usually, the copper ion content of the acidic copper plating cleaning water is 2-5 g / L of copper, and contains 1-3 g / L of sulfuric acid. We collectively refer to this waste liquid as acidic low-copper-containing waste liquid. At present, the treatment methods for this waste liquid containing low concentration of copper ions are neutralization precipitation method...
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IPC IPC(8): C02F9/04C01F7/74C02F1/72C02F1/44C02F103/16
Inventor 解付兵刘红霞蔡志华牛艳丽罗迎花黄超玉
Owner GUANGZHOU HKS SURFACE TREATMENT CO LTD