国外某渣选硫化铜精矿加温铁氧化酸浸试验研究  

Experimental Study on Heated Sulfuric Acid Leaching of a Foreign Copper Sulfide Concentrate from Slag Processing with Trivalent Iron Compound as Oxidant

作　　者：王洪杰 刘杰 周宽达 陆智国 陈兴海 蒙文飞 WANG Hongjie;LIU Jie;ZHOU Kuanda;LU Zhiguo;CHEN Xinghai;MENG Wenfei(LA Sino-Congolaise Des Mines S A,Beijing 100039,China)

机构地区：[1]华刚矿业股份有限公司,北京100039

出　　处：《矿冶工程》2023年第6期144-147,共4页Mining and Metallurgical Engineering

摘　　要：针对国外某渣选硫化铜精矿,采用加温铁氧化酸浸工艺回收其中铜,考察了氧化剂用量、浸出温度、浸出时间、初始硫酸浓度、液固比等因素对渣选硫化铜精矿中Cu浸出率的影响。结果表明,适宜的浸出条件为:氧化剂赤铁矿用量0.2 g/g矿、浸出温度85℃、浸出时间6 h、液固比5∶1、初始硫酸浓度200 g/L,此时铜浸出率可达97.96%。不同类型氧化剂验证试验结果表明,赤铁矿和磁铁矿在酸浸体系中均有较好的氧化性,可实现渣选硫化铜精矿中铜在中温条件下浸出,且三价铁化合物纯度越高,铜氧化浸出效果越好。A foreign copper sulfide concentrate from slag processing was treated by adopting heated sulfuric acid leaching with trivalent iron compound as an oxidant for recovering copper therein.The effects of oxidant dosage,leaching temperature,leaching time,initial concentration of sulfuric acid and liquid⁃solid ratio on the leaching rate of copper from copper sulfide concentrate were investigated.The results show that with the proper condition,including the oxidant of hematite at an amount of 0.2 g/g ore,leaching temperature of 85℃,leaching time of 6 h,liquid⁃solid ratio at 5∶1,and sulfuric acid with initial concentration of 200 g/L,the copper leaching rate can reach 97.96%.A verification test with different oxidants shows that hematite and magnetite present good oxidability in acid leaching system,leading to the copper in those copper sulfide concentrate leached out at a medium temperature.Also,the higher the purity of trivalent iron compounds,the better the oxidative leaching effect of copper.

关 键 词：渣选硫化铜 铜精矿 氧化剂 铁氧化 硫酸浸出 赤铁矿 

分 类 号：TF111[冶金工程—冶金物理化学]