Purification process of copper electrolysis waste liquid

Abstract

The invention discloses a purification process of copper electrolysis waste liquid, wherein the copper electrolysis waste liquid is introduced into a winning cell to dissolve out black copper. The purification process is characterized in that the copper iron concentration of post-electrodeposition liquid flowing out of the winning cell is 0.1-5 g / l. Compared with the prior art, the purification process disclosed in the invention has the advantages that the copper iron concentration of the post-electrodeposition liquid flowing out of the winning cell is greatly reduced, so that impurities of arsenic, antimony and bismuth are dissolved out and deposited on the surface of the cathode, and the structure of the black copper is effectively changed by dissolving out the impurities, in particular, lump-shaped black copper produced in the prior art is transformed into the black copper with a very loose structure, therefore, powdery black copper scraped from the surface of the cathode can be directly fed to a flash converting furnace for smelting. In the invention, the method of multiple circulations of the electrodeposition copper electrolysis waste liquid in the prior art is directly canceled, therefore, the process is simplified, and the problem of the prior art that the electrodeposition black copper can not be directly applied in the fire refining recovery process is effectively solved.

Description

technical field [0001] The invention relates to the field of chemical production, in particular to a purification process for copper electrolysis waste liquid. Background technique [0002] In the prior art, copper mining enterprises generally use the prepared blister copper to refine pure copper by electrolysis. The specific steps are: first make the blister copper into a thick plate as the anode, pure copper or stainless steel sheet as the cathode, and use sulfuric acid and sulfuric acid to The mixed solution of copper is used as the electrolyte, so that after electrification, the copper ions obtained by the thick copper at the anode lose electrons move to the cathode, and the copper ions that reach the cathode get electrons to precipitate electrolytic copper (also known as pure copper or cathode copper), but the actual During production, impurities such as arsenic, antimony, and bismuth in blister copper will electrolyze simultaneously with copper to generate arsenic ions...

AI Technical Summary

Problems solved by technology

[0003] In the above-mentioned prior art, the product black copper that adopts discontinuous electrodeposition method or continuous electrode method to electrodeposit copper electrolytic waste liquid to obtain is all in massive form, and these blocky black coppers are only suitable for traditional wet smelting to reclaim copper metal, However, for the currently commonly used pyrometallurgy process, since the flash blowing furnace can only process powdery materials, it is difficult to smelt these massive black copper, so how to ensure the electrowinning of copper electrolytic waste liquid The effective use of products is a problem that enterprises have been studying

Images