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分别采用嗜酸氧化亚铁硫杆菌和中度嗜热西伯利亚硫杆菌对含钼量极低的钼尾矿进行生物浸出实验研究,考察了有菌体系、无菌体系以及不同细菌对钼尾矿浸出效果的影响。采用ICP法测定浸出液中的钼浓度,pH计测定其氧化还原电位,并对浸出渣进行了SEM、XRD表征。结果表明:当矿浆浓度为5%时,两种微生物浸出工艺均能处理极低品位的钼尾矿,细菌的存在有利于钼尾矿的浸出;西伯利亚硫杆菌对钼尾矿的浸出效果更好,浸出23d后钼浸出率达到18%,而氧化亚铁硫杆菌的钼浸出率仅为8%。
The bioleaching experiments on molybdenum tailings with very low molybdenum content were carried out by using Acidithiobacillus ferrooxidans and Thiobacillus thuringiensis respectively. The effects of bacteria system, sterile system and different bacteria on the leaching of molybdenum tailings Effect of effect. The concentration of molybdenum in leachate was determined by ICP method. The redox potential was measured by pH meter. The leaching residue was characterized by SEM and XRD. The results showed that when the pulp concentration was 5%, the two kinds of microorganism leaching process can handle very low grade molybdenum tailings, the presence of bacteria is conducive to the extraction of molybdenum tailings; Thiobacillus sibiricum leaching molybdenum tailings better After leaching for 23 days, the molybdenum leaching rate reached 18%, while that of Thiobacillus ferrooxidans was only 8%.