(沈阳有色金属研究院冶金研究所，沈阳 110141)
摘 要: 研究一种非洲铜-钴氧化矿两段浸出过程。采取两段浸出的目的是实现矿石中铜和钴的选择性浸出。第一段主要用硫酸浸出矿石中的铜，第二段用硫酸和还原剂浸出矿石中的钴。第一段浸出的最佳技术条件：矿石粒度小于75 μm的比例占89%，硫酸加入量为铜-钴氧化矿质量的13%，液固比为4:1，浸出时间为60 min，温度为常温(25 ℃)；第二段浸出的最佳技术条件：浸铜渣液固比为4:1，温度为65 ℃，时间为150 min，初始酸浓度为20 g/L，还原剂加入量为理论量的1.5倍。结果表明：两段浸出过程铜和钴的浸出率分别达到97.13%和96.05%。
关键字: 铜-钴氧化矿；两段浸出；还原浸出；浸出率
（Metallurgical Institute, Shenyang Research Institute of Nonferrous Metals, Shenyang 110141, China）
Abstract:A two stage leaching process of the copper-cobalt oxide ore from Africa was investigated. The two stage leaching process was used to realize selective leaching of copper and cobalt in the ore. The first stage was the leaching of copper in ore using sulfuric acid, and the second stage was the leaching of cobalt using sulfuric acid and reductant. The optimum conditions for the first stage are as follows: the ratio of ore less than 75 μm is 89%, sulfuric acid mass fraction of the ore is 13%, liquid-solid ratio is 4:1, leaching time is 60 min and temperature is 25 ℃. The optimum conditions for the second stage are follows: liquid-solid ratio is 4:1, temperature is 65 ℃, time is 150 min, initial acid concentration is 20 g/L and reductant dosage is 1.5 times of the theory amount. The results show that the leaching efficiencies of copper and cobalt in two stage leaching process reach 97.13% and 96.05%, respectively.
Key words: copper-cobalt oxide ore; two stage leaching; reduction leaching; leaching efficiency
