摘要
As、Sb、Bi杂质的脱除一直是铜电解精炼的热点问题,目前应用最广的方法为电积法。该工艺脱除效率低、电流效率低,阴极上可能有砷化氢剧毒气体产生,而且不能将杂质彻底开路,通电过程中还会有黑铜粉产生。针对此问题,阳谷祥光铜业有限公司研发出锑基吸附剂,该吸附剂可以吸附铜电解液中的As、Sb、Bi,并且可以重复再生使用,是一种绿色环保的吸附净化方法。本文对此方法的较优工艺条件进行了试验研究,试验表明:吸附的最佳条件为吸附剂加入量As/Sb=1、温度70℃、搅拌速度350r/min,此条件下锑基吸附剂对As和Bi的吸附率达到80%以上;解吸的最佳条件为p H值10、温度60℃,此条件下解吸率达到85%以上;吸附剂可以循环使用40次左右,吸附效果良好。
The removal of As,Sb,and Bi impurities has always been a hot issue in copper electrolytic refining. At present,the most widely method is the electrowinning. This process has disadvantages such as low removal efficiency,low current efficiency,arsenic poisonous gas generated on the cathode,and the impurities cannot be completely removed,some black copper powder produced during the electrification process. In response to this problem,Yanggu Xiangguang Copper Industry Co.,Ltd. has developed an antimony-based adsorbent,which can adsorb As,Sb,and Bi in the copper electrolyte,and can be reused. It is a green and environmentally friendly adsorption purification method. In this paper,the optimal process conditions have been experimentally studied,and the results show that Under these conditions of adsorbent As/Sb = 1,the temperature 70 ℃,the stirring speed 350 r/min,the adsorption rate of As and Bi reaches more than 80%;the best conditions for desorption are pH = 10 and temperature 60 ℃,under these conditions,the desorption rate is over 85%;the adsorbent can be recycled for about 40 times,and the adsorption effect is good.
作者
韩义忠
谢祥添
贾兴州
HAN Yi-zhong;XIE Xiang-tian;JIA Xing-zhou
出处
《中国有色冶金》
CAS
北大核心
2021年第3期16-20,共5页
China Nonferrous Metallurgy
关键词
铜电解液
锑基吸附剂
电积法
吸附净化方法
As、Sb、Bi杂质
脱除效率
吸附率
循环使用
copper electrolyte
antimony-based adsorbent
electrowinning
adsorption purification
As
Sb
Bi impurities
removal efficiency
adsorption rate
cycle operation
