含砷含镍高酸硫酸铜结晶母液的综合利用  

Comprehensive Utilization of Mother Liquor Containing Arsenic and Nickel and High Acid Copper Sulfate

作　　者：罗钊荣 戴贞洧 张飞 谢太李 LUO Zhaorong;DAI Zhenwei;ZHANG Fei;XIE Taili(Guixi Smelter,Jiangxi Copper Company Limited,Guixi 335424,Jiangxi,China)

机构地区：[1]江西铜业股份有限公司贵溪冶炼厂,江西贵溪335424

出　　处：《有色金属（冶炼部分）》2024年第6期114-121,共8页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2023YFC2907903)。

摘　　要：针对硫酸铜结晶母液含砷、含镍、高酸的特点,根据正交试验法,采用pH调控法依次进行中和、沉铜、沉镍工业试验,探究了反应时间和终点pH对分离效果的影响。结果表明,采用液碱调控母液pH能有效回收铜、砷、镍元素。中和反应最佳参数为:终点pH=2.5~3.0、反应时间1.5 h、反应自然升温,能够以铜砷渣形式回收98%以上的砷,并与镍成功分离;沉铜反应终点pH=6.0~6.5、反应时间1.0 h、反应温度80~90℃,能实现铜沉淀率>93%;沉镍反应终点pH=10.0~10.5、反应时间2.0 h,在室温下压滤,镍沉淀率>98%。母液经处理后得到的沉镍后液含铜<50 mg/L,含砷<5 mg/L,含镍<100 mg/L,母液得到有效处理,实现铜回收率>96%,砷回收率>98%,镍回收率>84%。According to the characteristics of arsenic,nickel and high acid in the mother liquor of copper sulfate crystal,the industrial experiments of neutralization,copper and nickel sedimentation were carried out successively by pH value regulation method according to orthogonal experiment,and the effects of reaction time and pH value on separation effect were investigated.The results show that copper,arsenic and nickel can be recovered effectively by adjusting pH value of mother liquor with liquid alkali.The optimum parameters of neutralization reaction are as follows:terminal pH value is 2.5-3.0,reaction time is 1.5 h,natural temperature rise,more than 98%of arsenic can be recovered in the form of copper-arsenic slag,and successfully separated from nickel;The precipitation rate of copper is>93%when the final pH value of copper precipitation reaction is 6.0-6.5,the reaction time is 1.0 h,and the reaction temperature is 80-90℃;The pH value of the end point of nickel precipitation reaction is 10.0-10.5,the reaction time is 2.0 h,and the nickel precipitation rate is>98%at room temperature.The mother liquor of nickel precipitation after treatment contains copper<50 mg/L,arsenic<5 mg/L,nickel<100 mg/L,the mother liquor has been effectively treated.The copper recovery rate is>96%,the arsenic recovery rate is>98%,and the nickel recovery rate is>84%.

关 键 词：硫酸铜结晶母液 含砷废水 含镍废水 镍回收 废水资源回收 

分 类 号：TF803.2[冶金工程—有色金属冶金] TF811