脱铜终液气液硫化除杂回用铜电解系统研究与运用

随着原料铜精矿杂质含量的上升，原有净液除杂能力无法满足要求，每天需开路脱铜终液，一方面增加废水处理成本，另一方面造成金属镍、酸的损失，同时铜电解过程中需额外补充损失的酸。通过对开路脱铜终液处理的研究，采用硫氢化钠气液硫化除杂处理后，脱铜终液砷、锑、铋去除率达98%以上，而镍、酸基本不损失，且处理后液返回电解系统不会对高纯阴极铜产品质量产生不利影响。具有投资少、指标稳定、效益显著的特点。

Research on Removal of Impurities in Final Decoppering Solution by Gas-Liquid Vulcanization and Reuse to Copper Electrolysis System

With the increase of impurity content in raw copper concentrate, impurity removal ability of original liquid cannot meet the requirement, so the final liquid needs to be opened every day, which not only increases cost of wastewater treatment, but also causes loss of nickel and acid, at the same time, the lost acid should be added in the process of copper electrolysis. Through the study on treatment of open-circuit final solution of copper removal, removal rate of arsenic, antimony and bismuth in final solution of copper removal is over 98% after impurity removal treatment by gas-liquid sulfuration with NaHS, however, nickel and acid are not lost, and quality of high purity cathode copper will not be adversely affected by return of treated solution to electrolytic system. This process has the characteristics of low investment, stable index, and remarkable benefit.