摘要
以4N阴极铜为原料,研究了用硝酸体系电解精炼制备高纯铜新工艺,探讨了电解液成分对阴极铜中S、Cl、典型正电性杂质及负电性杂质质量分数的影响规律,分析了Cu(NO_(3))_(2)·3H_(2)O原料纯度、电解液组分(Cu^(2+)、HNO_(3)和Cl^(-)质量浓度)和电解周期对阴极铜纯度、杂质质量分数、电流效率和直流电耗的影响规律。结果表明:在Cu(NO_(3))_(2)·3H_(2)O纯度99%下配制电解液,控制电解液中Cu^(2+)质量浓度50 g/L、HNO 3质量浓度31.5 g/L、Cl^(-)质量浓度0.1 g/L、电解周期72~120 h最佳工艺条件下可制得纯度达6N5、主控杂质元素均达到GB/T 26017—2020标准中HPCu-6N要求的高纯阴极铜。
A new process for preparing high-purity copper by electrorefining in a nitric acid system was developed using a 4N copper cathode as raw material.The effects of electrolyte composition on the content of S,Cl,typical positively charged and negatively charged impurities in copper cathodes were investigated.Moreover,the influence of Cu(NO_(3))_(2)·3H_(2)O raw material purity,electrolyte components(Cu^(2+),HNO_(3)and Cl^(-)mass concentrations),and electrolysis period on copper cathode purity,impurity content,current efficiency,and electrical energy consumption was analyzed.The results show that the optimum process conditions are to prepare the electrolyte using 99%purity of Cu(NO_(3))_(2)·3H_(2)O,with Cu 2+mass concentration of 50 g/L,HNO_(3)mass concentration of 31.5 g/L,Cl^(-)mass concentration of 0.1 g/L,and electrolysis period of 72~120 h.Under the optimal conditions,high-purity copper cathode with purity up to 6N5 and main control impurity elements can meet the high purity cathode copper required by HPCu-6N in the national standard(GB/T 26017—2020).
作者
杨文明
王雨
罗劲松
邓戈
林艳
曾文斌
沐亚玲
YANG Wenming;WANG Yu;LUO Jingsong;DENG Ge;LIN Yan;ZENG Wenbin;MU Yaling(Southwest Copper Branch,Yunnan Copper Co.,Ltd.,Kunming 650102,China;Faculty of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Yunnan Province China-Lao Energy&Mining Analysis and Technological Innovation International Joint R&D Center,Kunming 650093,China;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming 650093,China)
出处
《湿法冶金》
CAS
北大核心
2024年第3期293-301,共9页
Hydrometallurgy of China
基金
云南省自然科学基金面上项目(202001AT070089)
校企联合项目(XNTY-生产-11-2021-0130)
云南省建设面向南亚东南亚科技创新中心专项(202303AP140019)。
关键词
电解精炼
高纯铜
硝酸体系
电解液
制备
electrorefining
high-purity copper
nitric acid system
electrolyte
preparation
