粗铜火法精炼氧的行为分析及含量控制  

Behavior analysis and content control of oxygen in pyrorefining of crude copper

作　　者：何恩 朱鹏春 王家波 招杨 HE En;ZHU Peng-chun;WANG Jia-bo;ZHAO Yang(Southwest Copper Branch,Yunnan Copper Co.Ltd.,Kunming 650102,China)

机构地区：[1]云南铜业股份有限公司西南铜业分公司,昆明650102

出　　处：《矿冶》2022年第6期80-86,共7页Mining And Metallurgy

摘　　要：针对铜火法精炼过程中阳极铜氧含量控制难题,系统研究了铜火法精炼过程氧的行为,结合生产实际分析了影响阳极铜氧含量的影响因素,并给出了降低阳极铜氧含量的控制措施。结果表明:铜火法精炼过程各阶段终点温度对阳极铜氧含量影响较大,过高和过低都会导致氧含量升高,过高会加速熔体二次吸氧,过低则导致脱杂不彻底;出铜过程缩短熔体流经距离,可减少高温熔体与空气的接触时间,减少二次吸氧,有效降低阳极铜氧含量;合理控制入炉原料、各阶段终点温度和还原终点氧含量以及二次吸氧时间,可将阳极铜氧含量控制在1300×10^(-6)以下,避免电解精炼过程的阳极钝化现象,为电解精炼创造良好的条件。Aiming at the difficult problem of controlling the oxygen content of anode copper in copper fire refining process,the oxygen behavior in copper pyrorefining process was systematically studied,the influencing factors on the oxygen content of anode copper were analyzed in combination with production practice,and the control measures for reducing the oxygen content of anode copper were given.The results show that the end point temperature in each stage of copper pyrorefining process has a great influence on the oxygen content of anode copper,too high and too low will lead to the increase of oxygen content,too high temperature will accelerate the secondary oxygen absorption of the melt,and too low temperature will lead to incomplete impurity removal.Shortening the melt flow distance during copper tapping can reduce the contact time between high-temperature melt and air,reduce the secondary oxygen absorption,and effectively reduce the oxygen content of anode copper.The oxygen content of anode copper can be controlled at below 1300×10^(-6) by reasonably controlling the raw materials to be fired,the end point temperature of each stage or the oxygen content at the end point of reduction and the time of secondary oxygen absorption,which can avoid anode passivation during electrolytic refining and create good conditions for electrolytic refining.

关 键 词：阳极铜 火法精炼 氧含量 阳极钝化 

分 类 号：TF811[冶金工程—有色金属冶金]