硫酸铅渣湿法固相还原铅的工艺研究  

Process Study on Wet Solid Phase Reduction of Lead from Lead Sulfate Residue

作　　者：陈俊华 武岳彪 田静 廖忠义 崔育涛 CHEN Jun-hua;WU Yue-biao;TIAN Jing;LIAO Zhong-yi;CUI Yu-tao

机构地区：[1]河南中原黄金冶炼厂有限责任公司,河南三门峡472000 [2]河南省黄金资源综合利用重点实验室,河南三门峡472000

出　　处：《有色冶金节能》2022年第6期36-39,共4页Energy Saving of Nonferrous Metallurgy

摘　　要：本文以白烟尘酸浸渣为原料,研究了在低氯体系下,采用铁粉作为还原剂对原料中的硫酸铅进行固相还原,考察了液固比、氯化钙浓度、铁粉用量、还原温度及时间等单因素条件对铅回收率的影响,得到最优还原条件:液固比2∶1,氯化钙浓度40 g/L,铁粉用量为铅理论量的1.2倍,还原温度70℃,还原时间3 h。在此条件下,铅回收率大于92%以上。This paper studied the new process of solid-phase reduction of lead sulfate in a low-chloride system using white offgas dust acid leaching residue as raw material and iron powder as reducing agent. It examined the effects on lead recovery posed by single-factor conditions such as liquid-solid ratio, calcium chloride concentration, iron powder dosage, and reduction temperature and time. The study obtained the following optimum reduction conditions: liquid-solid ratio of 2∶1, calcium chloride concentration of 40 g/L, iron powder dosage of 1.2 times the theoretical amount of lead, reduction temperature of 70 ℃ and reduction time of 3 h. Under these conditions, the lead recovery rate was more than 92%.

关 键 词：白烟尘 酸浸渣 固相还原 氯化钙 含铅固废 

分 类 号：TF812[冶金工程—有色金属冶金] X705[环境科学与工程—环境工程]