Preparation of High Purity Lead by Continuous Electrolysis of Low Impurity Lead Electrolyte
A kind of low-impurity lead electrolyte was prepared with lead ingots,fluorosilicic acid,hydrogen peroxide,bone glue,and β-naphthol as raw materials,and then was used in an experimental research on 14 consecutive cycles of electrolysis to produce refined lead.It is shown that the initial power consumption of lead electrolysis was 52.37 kW·h/t,and 6N high-purity lead was produced in the first two cycles;as the cyclic electrolysis process proceeded,the impurity content and lead ion content in the electrolyte gradually increased,while the mass concentration of fluorosilicic acid gradually decreased,resulting in an increase in the impurity content of precipitated lead.Therefore,the content of Cu,Ag,Fe,Al and other impurities in the precipitated lead all gradually increased after two cycles of electrolysis,and the precipitated lead met the standard for 5N but did not meet the standard for 6N high-purity lead.Furthermore,the power consumption also gradually increased,but remained at a low level of 50 kW·h/t to 70 kW·h/t for each cycle.
万方数据
维普
