铜电解液电积脱铜制备高纯阴极铜

利用电积法制备高纯阴极铜, 研究了添加剂、电解液温度、电流密度以及Cu²⁺浓度对电积法脱铜制备高纯阴极铜质量的影响。当添加剂(骨胶: 明胶: 硫脲质量比为6∶4∶5)用量为40 mg/L, 电解液温度为55 ℃, 电流密度为200 A/m², 电解液中Cu²⁺浓度从48.78 g/L降至31.71 g/L时, 电积脱铜得到的阴极铜质量达到了高纯阴极铜标准(GB/T 467-1997); 其电流效率达到99.19%, 高纯阴极铜产率达到38.09%。电积脱铜制备高纯阴极铜不仅增加了阴极铜产量, 而且可大大减少电积时黑铜板和黑铜粉。

Preparation of High-purity Cathode Copper by Electrodeposition Removal of Copper from Copper Electrolyte

Investigations were carried out on the influences of additives, electrolytic temperature, current density and Cu2+ concentration on the quality of the high-purity cathode copper prepared by electrodeposition decoppering. Under the following conditions such as additive(with mass ratio of bone glue∶gelatin∶thiourea of 6∶4∶5) dosage of 40 mg/L, electrolytic temperature of 55 ℃, current density of 200 A/m² and Cu²⁺ concentration in the electrolyte down from 48.78 g/L to 31.71 g/L, the quality of the prepared cathode copper reaches to the Chinese standard (GB/T467-1997) for high-purity cathode copper. The current efficiency is up to 99.19%. The yield of high-purity cathode copper is 38.09%. Not only the yield of cathode copper can be raised but also black copper board and black copper powder can be reduced when high-purity cathode copper is prepared by electrodeposition decoppering.