复杂硫化铜镍渣中温氧压浸铜镍—同步沉铁研究  

Study on Medium Temperature Oxygen Pressure Leaching of Complex Sulfide Copper Nickel Slag and Synchronous Iron Precipitation

作　　者：秦树辰 周起帆 郑朝振 苏立峰 王海北 刘三平 QIN Shuchen;ZHOU Qifan;ZHENG Chaozhen;SU Lifeng;WANG Haibei;LIU Sanping(BGRIMM Technology Group,Beijing 100160,China)

机构地区：[1]矿冶科技集团有限公司,北京100160

出　　处：《有色金属（冶炼部分）》2024年第10期141-146,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2021YFC2902501)。

摘　　要：针对复杂硫化铜镍渣进行了中温氧压浸铜镍—同步沉铁试验,查明了硫化铜镍渣中主要元素的存在形式,考察了氧压浸出工艺条件对铜、镍、铁、硫浸出率的影响。获得硫化铜镍渣高效浸铜镍—同步沉铁的最佳工艺参数为:硫酸(98%)20 g(即每吨铜镍渣硫酸200 kg)、浸出温度170℃、氧分压0.4 MPa、液固比5 mL/g、浸出时间5 h,在该条件下,铜、镍、铁、硫的浸出率分别为98.73%、98.86%、26.69%、93.17%,浸出液残酸浓度1.28 g/L,浸出液中铜、镍、铁质量浓度分别为77.04、18.80、0.67 g/L。The experiments of medium temperature oxygen pressure leaching of Cu,Ni,Fe and S,and synchronous iron precipitation in complex sulfide copper nickel slag were carried out.The main elements in sulfide copper nickel slag were found out,and the effects of oxygen pressure leaching conditions on the leaching rate of Cu,Ni,Fe and S were investigated.The leaching rate of copper,nickel,iron and sulfur is 98.73%,98.86%,26.69%,93.17%,respectively,the residual acid concentration in the leaching solution is 1.28 g L,and the mass concentration of copper,nickel and iron in the leaching solution is 77.04,18.80 and 0.67 g L,respectively,under the optimum conditions including dosage of sulfuric acid(98%)of 20 g(i.e.200 kg sulfuric acid per ton of copper-nickel slag),leaching temperature of 170℃,oxygen partial pressure of 0.4 MPa,liquid-solid ratio of 5 mL g,and leaching time of five hours.

关 键 词：硫化铜镍渣 中温氧压浸出 沉淀铁 

分 类 号：TF811[冶金工程—有色金属冶金] TF815