Recycling process of cobalt raffinate in cobalt electrodeposition process

Abstract

The invention discloses a recycling process of cobalt raffinate in a cobalt electrodeposition process. The process comprises: adding concentrated hydrochloric acid into the cobalt residual liquid with the cobalt concentration of 50-60g / L generated in a cobalt chloride electrodeposition process to prepare a cobalt-containing hydrochloric acid solution, and carrying out reverse extraction on the cobalt-containing hydrochloric acid solution through a loaded organic extraction agent to prepare a cobalt chloride solution with the cobalt concentration of 150-170g / L; and feeding the cobalt chloride solution to a closed cobalt chloride electrodeposition cell to prepare electrodeposited cobalt. By adopting the process disclosed by the invention, the amount of water and a cobalt chloride raw material entering an electrodeposition mechanism are reduced, the amount of evaporated water for keeping the balance of the whole device is also reduced, the cost is reduced, and meanwhile, the effects of saving energy and reducing consumption are also achieved.

Description

technical field [0001] The invention belongs to the technical field of electrolytic cobalt deposition, and in particular relates to a process for recycling cobalt residue in the cobalt electrolytic deposition process. Background technique [0002] In the production process of electrowinning cobalt, cobalt chloride solution of about 160g / l is used as raw material for electrowinning to generate cobalt metal and chlorine gas. The cobalt concentration in the resulting raffinate is about 50-60g / l, and the cobalt chloride of this concentration can no longer meet the normal requirements of electrowinning work, so the concentration of the raffinate needs to be increased. The commonly used method to increase the concentration is mainly evaporation and concentration, that is, heating the raffinate to evaporate the water in the solution to obtain a high-concentration cobalt chloride solution, which meets the concentration requirements of the electrowinning solution. Contents of the i...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the main purpose of the present invention is to provide a recycling process for the cobalt residue in the cobalt electrowinning process, which solves the problem that the cobalt residue produced in the cobalt chloride electrodeposition process in the prior art cannot be used as a raw material again. The requirements of use, so that the cobalt residue is discarded, resulting in the problem of high cost of the electrolytic cobalt process

Images