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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Comparing the extent of the dissolution of copper-cobalt ores from the DRC Region
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Comparing the extent of the dissolution of copper-cobalt ores from the DRC Region

机译：比较刚果民主共和国地区铜钴矿石的溶解程度

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Inorganic acids such as sulphuric acid have found use together with certain reducing agents in leaching of copper-cobalt oxide ores. These reagents are not ideal due to the adverse effect the inorganic acids generally have on the environment and the high costs of the reducing agents. In this study a copper-cobalt oxide ore from the Central African Copperbelt was leached in two different environments; sulphuric acid in conjunction with hydrogen peroxide as a reducing agent and tartaric acid. The effects of acid concentration, reducing agent concentration, and temperature were independently determined for both leaching environments. The sulphuric acid concentration was varied between 0.4 M and 1.2 M and the concentration of hydrogen peroxide between 4.0 M and 6.5 M, while the tartaric acid concentration was varied between 0.15 M and 0.35 M. The temperature was varied between 20°C and 50°C. The results showed that the extraction of both copper and cobalt increased with sulphuric acid concentration, reaching a peak at approximately 0.8 M and then decreasing at higher acid concentrations. A similar increase and decrease in metal extraction was observed when the reducing agent was increased. In leaching with tartaric acid, the extraction of cobalt was much higher than that of copper, although extraction of both metals increased with acid concentration. Additions of small amounts of hydrogen peroxide were found to increase cobalt extraction in tartaric acid but had a minimal effect on copper. An increase in the solution temperature had a significant effect in the organic acid environment, with the effect on cobalt extraction being much more pronounced than on copper.
机译：已发现无机酸（例如硫酸）与某些还原剂一起用于铜钴氧化物矿石的浸出。这些试剂由于无机酸通常对环境的不利影响和还原剂的高成本而并非理想的。在这项研究中，来自中非铜矿带的铜-钴氧化物矿石在两种不同的环境中浸出。硫酸，过氧化氢作为还原剂和酒石酸。在两种浸出环境中，酸浓度，还原剂浓度和温度的影响均独立确定。硫酸浓度在0.4 M至1.2 M之间变化，过氧化氢浓度在4.0 M至6.5 M之间变化，而酒石酸浓度在0.15 M至0.35 M之间变化。温度在20°C至50°之间变化C。结果表明，铜和钴的萃取率均随硫酸浓度的增加而增加，在约0.8 M处达到峰值，然后在较高的酸浓度下减少。当还原剂增加时，观察到金属萃取的类似增加和减少。用酒石酸浸提时，钴的萃取率远高于铜，尽管两种金属的萃取率随酸浓度的增加而增加。发现添加少量的过氧化氢可以增加酒石酸中钴的提取，但对铜的影响最小。溶液温度的升高在有机酸环境中具有显着影响，对钴萃取的影响比对铜的影响更为明显。

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