论文部分内容阅读
对金属硫叶菌浸出镍钼硫化矿进行了研究.结果表明,有菌组镍的浸出率均在90%以上,而无菌组为77.64%;驯化菌比非驯化菌的浸出率高,前者镍和钼的浸出率分别为94.7%和70.2%,后者为93.1%和68.4%;pH为2时浸出效果最佳,镍浸出率达100%,钼浸出率为66.97%;粒径<0.048mm和<0.077mm的浸样镍浸出率均达到100%,钼浸出率分别为68.4%和64.5%;低矿浆浓度比高矿浆浓度的浸出率高,5g/L矿浆镍和钼的浸出率分别达100%和87.29%;在无菌条件下,浸样添加0.5g/LFe3+和对照组的镍浸出率分别为92.8%和76.6%,钼浸出率为52.56%和49.34%;嗜热菌(金属硫叶菌)比常温菌(氧化亚铁硫杆菌)的浸出率高,前者镍钼浸出率分别为93.17%和73.52%,后者为67.34%和38.36%.
The results showed that the leaching rates of nickel with and without bacteria were above 90% and 77.64% respectively in the sterile group, while the leaching rate of domesticated bacteria was higher than that of non-domesticated bacteria. The former The leaching rates of nickel and molybdenum were 94.7% and 70.2% respectively, while the latter ones were 93.1% and 68.4%. The leaching efficiency was the best at pH 2, the leaching rate of nickel was 100%, the leaching rate of molybdenum was 66.97% mm and <0.077mm respectively, the leaching rates of molybdenum and molybdenum reached 100% and 68.4% and 64.5%, respectively. The leaching rates of low and high pulp concentrations were higher than those of high pulp concentrations Up to 100% and 87.29% respectively. Under the condition of aseptic conditions, the leaching rates of nickel leached by 0.5g / L Fe3 + and control were 92.8% and 76.6% respectively, and the leaching rates of molybdenum were 52.56% and 49.34% (Thiobacillus ferrooxidans) was higher than that of the thermophilic bacteria (Thiobacillus ferrooxidans). The former leaching rates of nickel and molybdenum were 93.17% and 73.52%, the latter being 67.34% and 38.36% respectively.