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以疏水性草分枝杆菌M.ph为对照,选用从褐煤中筛选的细菌FML和酵母菌RH,研究微生物在肥煤原煤表面的吸附作用,分析pH值、矿浆浓度和细胞浓度等因素对吸附的影响.结果表明,20 min内吸附即可达饱和,FML细菌与M.ph类似,吸附模式为单层吸附,RH细菌更接近多层吸附.酵母菌RH在pH=4~6时吸附较稳定,吸附率达82%,吸附容量为3.2 mg/g.微生物吸附后,煤表面性质发生了一定改变,RH更易吸附在精煤颗粒表面,可增强精煤的疏水性,FML则使原煤中矸石更亲水,因此可增大原煤中不同组分可浮性的差异,提高浮选效率.
Mycobacterium phlei M.ph was used as a control. The bacteria FML and yeast RH screened from lignite were used to study the adsorption of microorganisms on the surface of fat coal. The effects of pH, pulp concentration and cell concentration on the adsorption .The results showed that the adsorption was complete within 20 min, the FML bacteria were similar to M.ph, the adsorption mode was monolayer adsorption, RH bacteria was closer to multi-layer adsorption, and the yeast RH was adsorbed at pH = 4-6 Stable adsorption rate of 82%, adsorption capacity of 3.2 mg / g. After microbial adsorption, the surface properties of coal has undergone some changes, RH is more easily adsorbed on the surface of fine coal particles can enhance the hydrophobicity of coal, FML is the original coal The gangue is more hydrophilic, so it can increase the differences of floatability of different components in the raw coal and improve the flotation efficiency.