硫酸亚铁焙烧-水浸工艺分离黑铜泥中铜和砷  

Separation of Copper and Arsenic from Black Copper Mud by Ferrous Sulfate Roasting-Water Leaching Process

作　　者：贺山明[1] 李威 张佳敏 王龙倩 刘庆生[1] 彭如振 HE Shanming;LI Wei;ZHANG Jiamin;WANG Longqian;LIU Qingsheng;PENG Ruzhen(College of Metallurgical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]江西理工大学冶金工程学院,江西赣州341000

出　　处：《有色金属（冶炼部分）》2024年第7期33-37,84,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(52064023)。

摘　　要：采用硫酸亚铁焙烧-水浸工艺实现黑铜泥中铜、砷一步分离。考察了铁砷摩尔比(Fe/As)、焙烧温度、焙烧时间、水浸初始pH等对试验效果的影响。较优工艺条件为:焙烧温度400℃、Fe/As=0.3、焙烧时间120 min、水浸温度80℃、水浸时间60 min、水浸液固比7 mL/g、水浸初始pH=4.5,沉砷率高达99%以上,铜浸出率高达96%以上。经XRD分析,沉砷渣主要成分为臭葱石和氧化铁,实现了砷的安全固化处置。One-step separation of copper and arsenic from black copper mud was carried out by ferrous sulfate roasting-water leaching process.The effects of iron-arsenic mole ratio(Fe/As),roasting temperature,roasting time and initial pH value of water leaching on the experimental results were investigated.The results show that arsenic leaching rate is 99%and copper leaching rate is 96%under the optimum conditions including roasting temperature of 400℃,Fe/As=0.3,roasting time of 120 min,water leaching temperature of 80℃,water leaching time of 60 min,water leaching liquid-solid ratio of 7 mL/g,and initial pH value of 4.5.According to the analysis results of XRD,the main components of arsenic slag are scorodite and iron oxide,which realizes the safe solidification and disposal of arsenic.

关 键 词：黑铜泥 铜砷分离 臭葱石 焙烧 水浸 

分 类 号：TF811[冶金工程—有色金属冶金]