超高电流密度铜电解技术的开发及应用

Development and application of ultra-high current density copper electrolysis technology

铜冶炼原料含杂越来越高导致铜阳极板含杂也越来越高,传统电解技术处理高杂质阳极板存在A级铜合格率低、产能低、能耗高等问题,近些年开发的超高电流密度电解技术基本解决高杂质阳极板的电解精炼问题,但还存在进液装置易堵塞、槽电压及直流电耗高等问题。阳谷祥光铜业有限公司在原有高电流密度电解的基础上对电解装置、电解液循环系统、电解液过滤系统等进行了创新性改造,并在实践中进行了技改优化,还制定了标准作业程序,最终实现了在电流密度420~580 A/m^(2)下稳定运行、A级铜产率100%、残极率小于13%、吨铜综合能耗51.91 kg标煤的理想生产目标。

The increasingly high impurity content in raw materials for copper smelting has resulted in more than more impurities contained in copper anode plates. The conventional electrolytic technology for treating high-impurity anode plates has problems of low yield rate of Grade-A copper,low production capacity and high energy consumption,etc. Although the ultra-high current density electrolysis technology developed in recent years has basically solved the problems in the electrorefining of high-impurity anode plates,it’s still trapped by the liable blockage of electrolyte feeding device,high cell voltage and DC power consumption,among other problems. Based on the existing high current density electrolysis technology,Xiangguang Copper Co.,Ltd has made innovative modification to the electrolysis device,electrolyte circulation system and electrolyte filtration system,updated and optimized the technology in actual practice,developed standard operating procedures and finally realized the ideal production goals,i. e.,stable operation at the current density of 420 ~ 580 A/m^(2),Grade-A copper yield rate of 100%,spent anode ratio of less than 13%,and standard coal consumption of 51. 91 kg per ton of copper.