刚果（金）某高钴氧化铜矿分步酸浸试验

现代矿业 ›› 2025, Vol. 41 ›› Issue (11): 65-69，79.

刚果（金）某高钴氧化铜矿分步酸浸试验

刘杰^1，2周宽达^1，2 李勇^1，2 兰福荫^1，2汤川^1，2

1. 华刚矿业股份有限公司；2. 中铁资源集团有限公司

出版日期:2025-11-25 发布日期:2025-12-22

Step-by-step Acid Leaching Test of a High-cobalt Copper Oxide Ore in Congo (DRC)

1. Huagang Mining Co.，Ltd.；2. China Railway Resource Group Co.，Ltd.

Online:2025-11-25 Published:2025-12-22

摘要/Abstract

摘要： 为了高效回收刚果（金）某高钴氧化铜矿中的铜、钴有价金属，针对直接还原酸浸出工艺处理高钴氧化铜钴矿时铜、钴回收率低和酸耗高的问题，进行了先硫酸浸出铜、再还原浸出钴的分步硫酸浸出试验研究，并系统研究了磨矿细度、液固比、硫酸用量、浸出时间以及还原剂用量对铜、钴浸出效果的影响。研究结果表明：在磨矿细度-0.074 mm72%、液固比 4∶1、浸出时间 4 h、硫酸用量 126.22 kg/t、焦亚硫酸钠用量 60 kg/t 的条件下，铜含量 3.93%、钴含量 1.88%、铜氧化率 93.38% 的铜钴原矿采用分步酸浸工艺，获得了 96.87% 的铜浸出率和 96.17% 的钴浸出率，矿石净酸耗为 1 399.33 kg/t，获得的铜、钴浸出率高、酸耗低，目的矿物综合回收效果较好。

关键词: 高钴氧化铜, 分步酸浸, 还原剂

Abstract: In order to efficiently recover the valuable metals of copper and cobalt in a high-cobalt copper oxide ore from Congo（DRC），aiming at the problems of low recovery of copper and cobalt and high acid consumption in the treatment of high-cobalt copper-cobalt oxide ore by direct reduction acid leaching process，a step-by-step sulfuric acid leaching test of sulfuric acid leaching copper first and then reduction leaching cobalt is carried out. The effects of grinding fineness，liquid-solid ratio，sulfuric acid dosage， leaching time and reducing agent dosage on the leaching effect of copper and cobalt are systematically stud⁃ ied.The results show that under the conditions of grinding fineness of -0.074 mm72%，liquid-solid ratio of 4∶1，leaching time of 4 h，sulfuric acid dosage of 126.22 kg/t，sodium metabisulfite dosage of 60 kg/t， the copper-cobalt raw ore of copper content of 3.93%，cobalt content of 1.88%，copper oxidation rate of 93.38% adopts step-by-step acid leaching process，and 96.87% copper leaching rate and 96.17% cobalt leaching rate are obtained. The net acid consumption of the ore is 1 399.33 kg/t. The obtained copper and cobalt leaching rate is high，the acid consumption is low，and the comprehensive recovery effect of the tar⁃ get mineral is good.

刘杰, 周宽达, 李勇, 兰福荫, 汤川. 刚果（金）某高钴氧化铜矿分步酸浸试验[J]. 现代矿业, 2025, 41(11): 65-69，79.

LIU Jie, ZHOU Kuanda, LI Yong, LAN Fuyin, TANG Chuan, . Step-by-step Acid Leaching Test of a High-cobalt Copper Oxide Ore in Congo (DRC)[J]. Modern Mining, 2025, 41(11): 65-69，79.

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