提高铜电解精炼过程中的电流密度,是提高劳动生产率,挖掘企业生产潜力的重要途径。因此,近年来国内外趋向于采用较高的电流密度。然而,在一定条件下,提高电流密度会导致阳极产生钝化,使电解作业不能继续进行。为了防止阳极钝化,国外最大允许电流密度一般控制在250(安/米~2)左右。少数工厂也有采用周期反向电流电解,及试验用“平行环流”电解液的循环方式来提高电流密度的。在国内,上海冶炼厂等单位从 Increasing the current density in electrolytic copper refining process is an important way to improve labor productivity and tap the potential of production. Therefore, in recent years both at home and abroad tend to adopt higher current density. However, under certain conditions, increasing the current density leads to passivation of the anode, so that the electrolysis operation can not be continued. In order to prevent anode passivation, the maximum allowable current density abroad is generally controlled at about 250 (A / m ~ 2). A few factories also adopt cycle reverse current electrolysis and test the circulation mode of “parallel circulation” electrolyte to increase the current density. In China, Shanghai Smelter and other units from