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本文描述一种非常嗜热菌株氧化铜精矿 (其中黄铜矿 66%和黄铁矿 11% )的能力。在 70℃时进行的实验室分批试验表明 ,铜的浸出率可以达到 98%以上。一系列的连续试验均在一个由 3段浸出组成的扩大试验装置里进行 ,它由标准设计的机械搅拌充气浸出槽组成。试验中考查了浸出时间、给矿粒度、O2 和CO2 的传质量对生物浸出结果的影响。这些结果表明 ,铜的总浸出率可以达到 95 %。然而 ,与中温浸出菌和中等嗜热浸出菌比较 ,这种非常嗜热细菌对于矿浆浓度似乎更加敏感 ,而矿浆浓度又与给矿粒度有关系。氧的消耗量与当今处理难浸黄铁矿型金精矿的工业生物浸出槽所达到的最大用量接近。为了维持这一高的氧化速度 ,重要的是要保证O2 和CO2 通入反应槽的有效速率。这些试验均取得了很高的铜浸出率 ,表明用非常嗜热菌株浸出黄铜矿精矿工艺对进一步研究和评估其工业应用的可行性具有潜在的价值
This article describes the ability of a very thermophilic strain of copper oxide concentrate, with chalcopyrite 66% and pyrite 11%. Laboratory batch tests conducted at 70 ° C showed copper leaching rates above 98%. A series of consecutive tests were conducted in an extended test unit consisting of three stages of leaching consisting of a standard designed mechanical agitation aeration leachate tank. In the experiment, the effects of leaching time, ore particle size, mass transfer of O2 and CO2 on bioleaching results were investigated. These results show that the total copper leaching rate can reach 95%. However, this very thermophilic bacterium appears to be more sensitive to the pulp concentration than the mesophilous and moderate thermophilic leachate, which in turn is related to the ore size. The amount of oxygen consumed is similar to the maximum amount achieved by the industrial bioleaching tank for refractory pyritic gold concentrates today. In order to maintain this high oxidation rate, it is important to ensure that the effective rate of passage of O2 and CO2 into the reaction vessel is maintained. These tests all achieved very high rates of copper leaching, indicating that leaching the chalcopyrite concentrate process with a very thermophilic strain is potentially valuable for further research and evaluation of the feasibility of its industrial application