Electrowinning purification system and purification method for copper electrolytic waste liquid

Abstract

The invention discloses an electrodeposition purification system of a copper electrolysis waste liquid. The electrodeposition purification system comprises an elevated tank and N sequentially arranged electrodeposition cells, wherein a liquid outlet of the elevated tank is connected with the electrodeposition cells through pipelines; liquid outlets of the first, the second, ... the ith, ... and the (N-1)th electrodeposition cells respectively lead to the second, the third, ...the (i+1)th ... and the Nth electrodeposition cells; a liquid outlet of the Nth electrodeposition cell leads to the first electrodeposition cell and an electrodeposition liquid recovery system; i is a natural number between 2 and (N-1); and N is 6 or above. The invention further discloses a purification method of the electrodeposition purification system of the copper electrolysis waste liquid. Compared with the prior art, the purification system has the advantages that the electrodeposition cells are series-parallel feeding structures combining series connection and parallel connection, the utilization is convenient, and the problem that blocky electrodeposited black copper of the prior art cannot be directly applied to a fire refining recovery technology is effectively solved.

Description

technical field [0001] The invention relates to the technical field of copper smelting, in particular to an electrowinning purification system for copper electrolysis waste liquid and a purification method thereof. Background technique [0002] In the prior art, copper mining enterprises generally use the prepared blister copper to refine pure copper by electrolysis, but in actual production, impurities such as arsenic, antimony, and bismuth in blister copper will be electrolyzed simultaneously with copper to generate arsenic ions, antimony Ions and bismuth ions, these ionic impurities can form flocculent substances with little solubility in the copper electrolyte and adhere to the surface of the cathode and electrolytic copper, which greatly reduces the quality of the generated electrolytic copper. In order to solve the above problems, enterprises often use the electrowinning method to purify the copper electrolytic waste liquid (that is, the copper electrolyte containing a...

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Problems solved by technology

[0007] The beneficial effect of adopting the above technical solution is that compared with the prior art, the electrowinning tank in the purification system of the present invention adopts a mixed feeding structure combining series and parallel, and in specific use, the Nth Part of the electrowinning liquid with low copper concentration discharged from the feed liquid outlet of the electrowinning tank is discharged into the electrowinning liquid recovery system, and the other part is introduced into the first electrowinning tank, which can not only increase the total capacity of each electrowinning tank The liquid intake can reduce the deviation of local copper concentration, and can also reduce the initial copper concentration of the feed solution in each electrowinning tank, thereby slowing down the precipitation speed of copper ions on the cathode, so that the generation of blocky black copper can be effectively avoided. The purification system disclosed by the invention is not only easy to use, but also effectively solves the problem that the block-shaped electro-deposited black copper in the prior art cannot be directly applied to the pyro-smelting recovery process in the double-flash copper smelting process

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