硫化铜精矿氧压浸出工艺研究  

Study on Oxygen Pressure Leaching Process of Copper Sulfide Concentrate

作　　者：仝一喆[1,2] 刘自亮 王恒辉 孟凡成 TONG Yizhe;LIU Ziliang;WANG Henghui;MENG Fancheng(CINF Engineering Corporation Limited,Changsha 410001,China;Hunan Lead-Zinc Clean Smelting Engineering Technology Research Center,Changsha 410001,China;National Engineering Laboratory of Cleaner Production Technology of Hydrometallurgy,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]长沙有色冶金设计研究院有限公司,长沙410001 [2]湖南省铅锌清洁冶炼工程技术研究中心,长沙410001 [3]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京100190

出　　处：《有色金属（冶炼部分）》2024年第10期30-37,共8页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2018YFE0123100)。

摘　　要：针对硫化铜精矿火法冶炼工艺副产硫酸,在硫酸滞销地区难以大规模应用的难题,研究了硫化铜精矿氧压浸出工艺。对某硫化铜精矿原料进行了成分、物相及有价元素赋存状态进行了分析,从理论上分析了硫化铜精矿氧压浸出的可行性,研究了一段氧压浸出、两段氧压浸出工艺的浸出效果。结果表明,采用两段逆流氧压浸出,一段控制温度135~140℃、总压1.3~1.4 MPa、时间2~2.5 h、分散剂加入量4‰~5‰、沉矾剂加入量2.5%~3%,二段控制温度165~170℃、总压1.4~1.5 MPa、时间2.5~3 h、分散剂加入量6‰~7‰、沉矾剂加入量3%~3.5%,铜浸出率为90.49%~92.25%。一段浸出液含铜90.78~92.34 g/L、铁10.81~13.84 g/L、硫酸28~30 g/L,可送后续除铁净化—电积生产电铜。Address to the by-product sulfuric acid in the pyrometallurgical smelting process of copper sulfide concentrate is difficult to be applied on a large scale in the unsalable area of sulfuric acid,the oxygen pressure leaching process of copper sulfide concentrate was studied.The composition,phase and occurrence state of valuable elements of a copper sulfide concentrate raw material were analyzed.The feasibility of oxygen pressure leaching of copper sulfide concentrate was analyzed theoretically.The leaching effects of one-stage oxygen pressure leaching and two-stage oxygen pressure leaching process were studied.The results show that the copper leaching rate is 90.49%—92.25%by two-stage countercurrent oxygen pressure leaching.In the first stage,the temperature is 135—140℃,the total pressure is 1.3—1.4 MPa,the time is 2—2.5 h,the amount of dispersant is 4‰—5‰,and the amount of precipitation agent is 2.5%—3%.In the second stage,the temperature is 165—170℃,the total pressure is 1.4—1.5 MPa,the time is 2.5—3 h,the amount of dispersant is 6‰—7‰,and the amount of precipitation agent is 3%—3.5%.The leaching solution from the first stage contains copper 90.78—92.34 g L,iron 10.81—13.84 g L and H 2 SO 428—30 g L,which can be sent to subsequent iron removal purification-electrowinning to produce electrocopper.

关 键 词：湿法炼铜 硫化铜精矿 氧压浸出 

分 类 号：TF811[冶金工程—有色金属冶金]