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在铜电解过程中,阳极含有少量的镍(0.05～0.7%),这部分镍在电解过程中与铜一道从阳极溶解进入电解液,由于其电位较负,不能在阴极析出,残留在电解液中,韭逐渐积累如果不设法控制,镍积累到一定程度就会为害电解过程,影响阴极铜产品质量,使技术经济指标急骤变坏。同时,以纯硫酸镍晶体或金属镍形态回收这部分镍尚有其经济意义,然而目前国内大多数铜电解车间的净液工序。普遍采用直火蒸发或冷冻,产出粗硫酸镍,由于粗硫酸镍含金属
In the process of copper electrolysis, the anode contains a small amount of nickel (0.05-0.7%). This part of nickel dissolves from the anode into the electrolyte along with copper in the electrolysis process. Because of its relatively negative potential, it can not precipitate at the cathode and remains in the electrolyte In the gradual accumulation of Chinese leek if you do not manage to control the accumulation of nickel to a certain extent, it will harm the electrolysis process, affecting the quality of copper cathode products, technical and economic indicators of a sudden deterioration. In the meantime, it is of economic significance to recover this part of nickel in the form of pure nickel sulfate crystals or metallic nickel. However, at present, most of the domestic copper electrolysis plants have a net solution process. Direct fire evaporation or freezing, the output of crude nickel sulfate, nickel sulfate crude metal