关键词: 氧化铜矿石, 浸出, 钴, 萃余液返回利用

Abstract: There is 1.53% copper and 0.024% cobalt in a copper ore from Africa.Copper mainly exists in form of oxidized ore.Leaching process is brought to recovery the copper and cobalt resources.With the ore properties gradually become complicated and copper grade reduced，the production cost is high and the production index is unstable via the original process.To improve the production index，agitation leaching experiments was conducted on the ore.Results indicated that，the optimum leaching conditions is leaching temperature 65 ℃，pulp density 30%，leaching time of 3 h，stirring speed 500 r/min，raffinate cyclic reuse，adding acid amount of 20.24 kg/t，the copper leaching rate is 78.65%，cobalt leaching rate is 45.25%.Copper and cobalt leaching rate was increased by 3.65 and 2.25 percentage points,compared on-site process.The test results can provide important technical support for the on-site production.

Key words: Copper oxide ore, Leaching, Cobalt, Raffinate cyclic reuse