Sulphuric Acid Bake-Leach Process for the Treatment of Mixed Copper-Cobalt Oxide Ores  

作　　者：Precious Mwamba Jewette H. Masinja James Manchisi Leonard Kabondo Precious Mwamba;Jewette H. Masinja;James Manchisi;Leonard Kabondo(Department of Metallurgy and Mineral Processing, University of Zambia, Lusaka, Zambia;Metallurgy Department, Copperbelt University, Kitwe, Zambia)

机构地区：[1]Department of Metallurgy and Mineral Processing, University of Zambia, Lusaka, Zambia [2]Metallurgy Department, Copperbelt University, Kitwe, Zambia

出　　处：《Journal of Minerals and Materials Characterization and Engineering》2022年第2期174-184,共11页矿物质和材料特性和工程（英文）

摘　　要：A sulphuric acid bake–leach method for the treatment of mixed copper-cobalt oxide minerals was investigated as an alternative to the reductive leaching method. Sulphuric acid bake-leach process of the mixed copper-cobalt oxide ore was carried out by mixing the sample with sulphuric acid followed by baking of the mixture in a muffle furnace. Baking tests were conducted at different conditions such as temperature, time, and varying amounts of acid. The reacted samples were then subjected to water leaching at room temperature to determine the leachability of copper and cobalt from the baked material. The dissolutions of copper and cobalt were dependent on acid concentration with cobalt showing more sensitivity to the amount of acid. Both copper and cobalt were extracted from the baked material within short leaching times and without the addition of reducing agents. The outcome of this work has shown that the sulphuric acid bake-leach process is a possible alternative to the reductive leaching method for copper-cobalt oxide ores.A sulphuric acid bake–leach method for the treatment of mixed copper-cobalt oxide minerals was investigated as an alternative to the reductive leaching method. Sulphuric acid bake-leach process of the mixed copper-cobalt oxide ore was carried out by mixing the sample with sulphuric acid followed by baking of the mixture in a muffle furnace. Baking tests were conducted at different conditions such as temperature, time, and varying amounts of acid. The reacted samples were then subjected to water leaching at room temperature to determine the leachability of copper and cobalt from the baked material. The dissolutions of copper and cobalt were dependent on acid concentration with cobalt showing more sensitivity to the amount of acid. Both copper and cobalt were extracted from the baked material within short leaching times and without the addition of reducing agents. The outcome of this work has shown that the sulphuric acid bake-leach process is a possible alternative to the reductive leaching method for copper-cobalt oxide ores.

关 键 词：Democratic Republic of Congo (DRC) Mixed Copper-Cobalt Oxide Sulphuric Acid Baking Sulphate Reducing Agent Metal Dissolution 

分 类 号：O62[理学—有机化学]