摘要
对微生物浸出低品位软锰矿进行研究。研究结果表明:在MnO2-FeS2-H2SO4细菌浸出体系下,pH为1.6和1.8时,细菌作用明显,Fe3+对MnO2-FeS2-H2SO4的嗜酸氧化亚铁硫杆菌浸出过程具较好的催化作用。一定浓度的H+使黄铁矿表面更容易氧化,但H+浓度过高或过低都不利于表面反应进行;Fe3+可以降低黄铁矿的氧化还原电位,促进了软锰矿的还原浸出;微生物浸出过程中存在MnO2-FeS2接触反应模型和MnO2-FeS2-H2SO4的细菌浸出催化模型,其中不同反应阶段存在着不同的模型反应方式。
Microbial leaching of low-grade manganese ore was studied. The result shows that bacteria have obvious effects in pH of 1.6 or 1.8 and Fe^3＋ ions have catalytic effect in the MnO2-Fe S2-H2SO4 bacterial leaching system. The pyrite surface is more easily oxidized at a certain concentration of H^＋, but too high or low concentration of H＋ is not conducive to the surface reaction. Fe^3＋ ions can reduce the pyrite potential and promote the reduction leaching of pyrolusite. MnO2-FeS2 contact reaction model and MnO2-FeS2-H2SO4 bacterial leaching of catalytic model exist in the microbial leaching process, and there are different reaction models in different reaction stages.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第8期2791-2796,共6页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(21176242
21176026)
中央高校基本科研业务费专项资金资助项目(FRT-TP-09-002B)
国家支撑计划项目(2012BAB14B05
2012AA062401)
中国大洋矿产资源研究开发计划项目(DY125-15-T-08)~~
