嗜酸性氧化亚铁硫杆菌对煤炭浮选体系的影响

Effect of Acidithiobacillus Ferrooxidans on Coal Flotation System

煤炭浮选体系存在嗜酸性氧化亚铁硫杆菌,该细菌对浮选过程的影响尚不明确。浮选作业时,选煤厂通常使用煤油作为捕收剂,以分离纯煤和主要杂质矿物——石英和黄铁矿。因此,探究该细菌分别在煤、石英、黄铁矿表面的吸附作用,在优化浮选效率方面具有重要意义。嗜酸性氧化亚铁硫杆菌、纯煤、石英、黄铁矿及吸附后的复合体系的Zeta电位、表面接触角和傅里叶红外光谱谱图表明,该细菌会导致原浮选体系效率降低,当引入煤油后,该体系浮选效率提高,这主要是溶液中带电离子相互结合和细菌与矿物表面官能团相互作用引起的。

Acidithiobacillus ferrooxidans exists in the coal flotation system.However,its influence on the flotation process is unclear.In flotation operations,kerosene is commonly used as a collector to separate pure coal from quartz and pyrite.Therefore,the study of the bacteria adsorbing coal,quartz,and pyrite is of great significance in optimizing flotation efficiency.The testing results of zeta potential,contact angle and Fourier infrared spectrum of the bacteria,coal,quartz,pyrite and the composite system after adsorption indicate that the bacteria reduce the efficiency of the original flotation system while kerosene as the whole improves the efficiency of the flotation system,which is mainly caused by electrostatic interaction and chemical reaction.