工艺条件对铜电解精炼过程直流电耗的影响

Effect of Process Conditions on Power Consumption of Copper Electrorefining

采用单因素试验研究了电解液温度(40-70℃)、电流密度(200-320A/m^2)、H_2SO_4浓度(110-230g/L)、Cu^(2+)浓度(25-65g/L)、极间距(20-35mm)等工艺条件对铜电解精炼过程直流电耗的影响规律。结果表明,随着电流密度和极间距的增大,直流电耗显著升高,随电解液温度和硫酸浓度的增加而显著降低;随着电解液中铜离子浓度的增大,直流电耗先急剧降低,然后趋于平稳,在55g/L时电耗最小。

Influences of electrolyte temperature（40～70℃）,current density（200～320 A/m2）,sulfuric acid concentration（110～230 g/L）,cupric ion concentration（25～65 g/L）,and electrode spacing（20～35 mm）on power consumption of copper electrorefining were investigated by single factor experiment.The results show that power consumption rises significantly with increase of current density and electrode spacing,and drops remarkably with rise of electrolyte temperature and sulfuric acid concentration.Upon rising of Cu^（2＋） concentration,power consumption drops sharply firstly and then tends to maintain stable,the minimum power consumption is obtained with Cu^（2＋） concentration of 55 g/L.