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对嗜热金属球菌(Metallosphaera sedula)浸出镍钼硫化矿进行了研究,以探求高效可持续的生物冶金方法.结果表明:有菌组镍的浸出率均在91%以上,而无菌组为77.64%;以亚铁为能源培养的驯化菌组镍和钼的浸出率分别为96.56%和65.43%,非驯化菌组为94.37%和60.20%;起始pH为2时浸出组镍浸出率达97.55%,钼浸出率为62.97%;粒径小于0.048mm和小于0.077mm的浸样镍浸出率分别为97.58%和95.37%,钼浸出率分别为64.46%和59.54%;低矿浆质量浓度比高矿浆质量浓度的浸出率高,5g.L-1矿浆镍和钼的浸出率分别达98.67%和81.87%;在无菌条件下,浸样添加0.5g.L-1Fe3+和对照组镍浸出率分别为91.19%和77.64%,钼浸出率为52.25%和50.19%;透析浸出率比非透析浸出率低;金属球菌浸出组比氧化亚铁硫杆菌浸出组的浸出率高,前者镍和钼浸出率分别为94.01%和64.74%,后者仅为67.77%和38.16%.
Metallosphaera sedula leaching nickel-molybdenum sulphide ore was studied in order to explore efficient and sustainable bio-metallurgy method.The results showed that: the leaching rate of nickel in the bacteria group were above 91%, while the sterility group was 77.64 % Respectively. The leaching rates of nickel and molybdenum were 96.56% and 65.43%, 94.37% and 60.20% respectively for the domesticated bacteria fermented with ferrous iron, and the nickel leaching rate was 97.55 %, And molybdenum leaching rate was 62.97%; leaching nickel leaching rates of 97.58% and 95.37% for particle sizes less than 0.048mm and less than 0.077mm respectively, and molybdenum leaching rates were 64.46% and 59.54% respectively; low pulp concentration was higher than that of high pulp Leaching rate of 5g.L-1 pulp was 98.67% and 81.87% respectively for the leaching rate of 5g.L-1. Under the condition of aseptic conditions, the leaching rates of 0.5gL-1Fe3 + and control leaching were 91.19% And 77.64% respectively. The leaching rates of molybdenum and molybdenum were 52.25% and 50.19%, respectively. The dialysis leaching rate was lower than that of non-dialysis leachate. The Leaching rate of the leaching group was higher than that of the Thiobacillus ferrooxidans leaching group. The leaching rates of nickel and molybdenum were 94.01 % And 64.74%, the latter only 67.77% and 38.16%.