从酸泥中提取铜和硒的试验研究  

Experimental study on extraction of copper and selenium from acid mud

作　　者：贺来荣 郭金权[1,2] 陈彩霞 苏俊敏[1,2] 赵秀丽 张彦儒[1,2] 欧晓健 陈小林[1,2] 席海龙 HE Lai-rong;GUO Jin-quan;CHEN Cai-xia;SU Jun-min;ZHAO Xiu-li;ZHANG Yan-ru;OU Xiao-jian;CHEN Xiao-lin;XI Hai-long(State Key Laboratory of Nickel and Cobalt Resources Comprehensive Utilization,Jinchang 737100,China;Jinchuan Group Co.,Ltd.,Jinchang 737100,China)

机构地区：[1]镍钴资源综合利用国家重点实验室,甘肃金昌737100 [2]金川集团股份有限公司,甘肃金昌737100

出　　处：《中国有色冶金》2022年第6期24-30,共7页China Nonferrous Metallurgy

摘　　要：在铜冶炼过程中会产出大量含二氧化硫的烟尘,经喷淋后形成酸泥,酸泥主要成分为铅的化合物,还含有一定量的硒和铜等有价金属元素以及一些稀散贵金属元素。本试验以铜冶炼厂产出酸泥为原料开展试验研究,采用“加压氧浸-LIX984萃取除铜-铁粉还原沉硒-粗硒提纯”工艺提取酸泥中的硒、铜有价元素。试验研究结果表明:控制合适的高压氧浸条件,硒的浸出率大于91%,铜的浸出率大于95%;采用LIX984萃取除铜时,铜的萃取率大于92%,铜的反萃率大于95%;铁粉还原沉硒产出粗硒粉经进一步提纯,可产出硒品位为99.26%的硒粉产品。整个工艺试剂用量少、无废水排放,是一种绿色环保工艺,实现了酸泥中铜和硒的高效提取。A large amount of SO_(2)-bearing off-gas dust is generated during copper smelting process,which turns into acid mud after being sprayed.The acid mud mainly contains lead compounds,and a certain amounts of valuable metals,such as selenium and copper,and some scattered precious metals.An experimental study was carried out with the acid mud produced by a copper smelter as raw material by adopting the process of pressure oxidative leaching-LIX984 extraction for Cu removal-iron powder reduction for Se precipitation-purification of crude selenium,to extract Se,Cu and other valuable elements from the acid mud.The results show that under proper POX leaching conditions,the leaching rate of Se is more than 91% and that of Cu is more than 95%;in the section of LIX984 extraction for Cu removal,the Cu extraction rate is more than 92% and the Cu stripping rate is more than 95%;selenium powder product with 99.26% Se grade can be obtained after the crude selenium resulting from the iron powder reduction is subject to further purification.The process is environment-friendly due to low reagent consumption and zero discharge of wastewater.The research has realized comprehensive utilization of Cu and Se from the acid mud.

关 键 词：酸泥 加压氧浸 萃取 反萃 还原沉硒 绿色冶金 资源回收 铜硒提取 

分 类 号：TF811[冶金工程—有色金属冶金] TF843.5[环境科学与工程—环境工程] X758