Электрохимическое извлечение цинка из отработанных электролитов цинкования

Abstract

It is studied process of electrochemical extraction of ions of zinc from spent zinc electrolyte. It is established, that application of electrolysis at gradual decrease in current density allows to extract zinc effectively from spent zinc electrolyte. There is a decrease in concentration of metal from 9 to 2,4 g/l to an average zinc current efficiency of 31 % during 17 hours of straight electrolysis with quantity of the passed electricity 3,56 А·h. There is a decrease in concentration of zinc from 24,2 to 1,3 г/л to an average zinc current efficiency of 34 % at membrane electrolysis for 13 hours with quantity of the passed electricity 1,97 А·h. Application of membrane electrolysis will allow to prevent process of oxidation of chlorine on the anode.