铜冶炼电收尘酸浸液硫化砷渣沉铜行为研究  

Copper Precipitation Process with Arsenic Sulfide Residue for Acid Leaching Solution of Electrostatic Precipitator Dust from Copper Smelting Production

作　　者：马云聪 许俊 佘宗华[1] 罗豪 MA Yuncong;XU Jun;SHE Zonghua;LUO Hao(Changsha Research Institute of Mining and Metallurgy Co Ltd,Changsha 410012,Hunan,China;Guangxi Jinchuan Nonferrous Metals Co Ltd,Fangchenggang 538000,Guangxi,China)

机构地区：[1]长沙矿冶研究院有限责任公司,湖南长沙410012 [2]广西金川有色金属有限公司,广西防城港538000

出　　处：《矿冶工程》2023年第6期116-118,127,共4页Mining and Metallurgical Engineering

基　　金：国家重点研发计划课题(2018YFC1903304⁃03)。

摘　　要：针对高硫酸浓度且铁、砷以高价态Fe^(3+)、As^(5+)形式存在的酸浸液,采用硫化砷渣为沉铜剂沉铜。首先开展了不同酸浓度下单一Cu^(2+)、Fe^(3+)溶液中硫化砷渣加入量实验,在此基础上再进行了实际酸浸液沉铜、浸出砷实验。结果表明,采用硫化砷渣沉铜时,首先发生Fe^(3+)与S^(2-)的氧化还原反应,其次是As^(5+)与S^(2-)的氧化还原反应,最后是Cu^(2+)的硫化沉淀反应;硫化砷渣加入量为理论量的1.4倍时,沉铜率较高,但砷溶出率较低。The acid leaching solution of electrostatic precipitator dust from copper smelting has a high concentration of sulfuric acid,in which the iron and arsenic exist in the form of Fe^(3+)and As^(5+),thus it is decided to adopt arsenic sulfide residue as the precipitant for copper precipitation.Firstly,an experiment was performed on the addition of arsenic sulfide residue in single Cu^(2+)and Fe^(3+)solution with different acid concentrations.Based on that,an experiment was performed for copper precipitation and arsenic leaching in the actual acid leaching solution.The results show that in the process of copper precipitation with arsenic sulfide residue,oxidation and reduction reactions between Fe^(3+)and S^(2-)occur firstly,which is followed by oxidation and reduction reactions of As^(5+)and S^(2-),and finally a sulfurization reaction for precipitation of Cu^(2+).When the addition of arsenic sulfide residue is at an amount of 1.4 times the theoretical amount,it is shown that the copper precipitation rate is relatively higher,but the rate of arsenic dissolution is lower.

关 键 词：铜冶炼 电收尘 硫化砷渣 沉铜 溶出 砷 铁 高酸度 

分 类 号：X705[环境科学与工程—环境工程]