富钴铜冶炼渣预浸—氧压浸出工艺研究  

Study on the Process of Pre-leaching and Oxygen Pressure Leaching of Cobalt-rich Copper Smelting Slag

作　　者：李硕夫 朱景和[1] LI Shuofu;ZHU Jinghe(China Nonferrous Metal Mining(Group)Co.,Ltd.,Beijing 100029,China)

机构地区：[1]中国有色矿业集团有限公司,北京100029

出　　处：《有色金属（冶炼部分）》2024年第5期34-38,共5页Nonferrous Metals（Extractive Metallurgy)

摘　　要：铜冶炼过程中产生的冶炼渣含有较多的铜、钴等有价金属,从冶炼渣中回收这些有价金属具有重要经济价值和环保意义。以Cu含量8.26%、Co含量1.52%的富钴铜冶炼渣为原料,采用预浸——氧压浸出工艺对其进行处理。系统考察了酸矿比、反应温度、反应时间、氧分压、液固比对Co、Cu、Fe浸出率浸出效果的影响,得出最佳工艺条件为:液固比3、反应温度230℃、反应时间1.5 h、酸矿比350 kg t、磨矿细度—0.074 mm占75%、氧分压0.2 MPa,在该条件下,Co、Cu、Fe浸出率分别达到98.38%、95.34%和2.07%。相较于常压浸出,该工艺能有效降低酸耗和浸液中铁离子浓度。The smelting slag produced in the process of copper smelting contains more copper,cobalt and other valuable metals,and recovering these valuable metals from smelting slag has important economic value and environmental protection significance.Cobalt-rich copper smelting slag with Cu content of 8.260%and Co content of 1.515%was taken as raw material and treated by pre-leaching-oxygen pressure leaching process.The effects of acid-ore ratio,reaction temperature,reaction time,oxygen partial pressure and liquid-solid ratio on leaching rate of Co,Cu and Fe were studied systematically.The leaching rate of Co,Cu and Fe is 98.38%,95.34%and 2.07%,respectively under the optimum process conditions including liquid-solid volume mass ratio of 3,reaction temperature of 230℃,reaction time of 1.5 h,acid-ore ratio of 350 kg t,75%of grinding fineness—0.074 mm,and oxygen partial pressure of 0.2 MPa.Compared with the atmospheric pressure leaching,this process can effectively reduce the acid consumption and the concentration of ferric ions in the leaching solution.

关 键 词：富钴铜冶炼渣 预浸 氧压酸浸 铜 钴 回收 

分 类 号：TF803.2[冶金工程—有色金属冶金]