(沈陽有色金屬研究院冶金研究所，沈陽 110141)
摘 要: 研究一種非洲銅-鈷氧化礦兩段浸出過程。采取兩段浸出的目的是實現(xiàn)礦石中銅和鈷的選擇性浸出。第一段主要用硫酸浸出礦石中的銅，第二段用硫酸和還原劑浸出礦石中的鈷。第一段浸出的最佳技術(shù)條件：礦石粒度小于75 μm的比例占89%，硫酸加入量為銅-鈷氧化礦質(zhì)量的13%，液固比為4:1，浸出時間為60 min，溫度為常溫(25 ℃)；第二段浸出的最佳技術(shù)條件：浸銅渣液固比為4:1，溫度為65 ℃，時間為150 min，初始酸濃度為20 g/L，還原劑加入量為理論量的1.5倍。結(jié)果表明：兩段浸出過程銅和鈷的浸出率分別達到97.13%和96.05%。
關(guān)鍵字: 銅-鈷氧化礦；兩段浸出；還原浸出；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
