Effect of coal particle size on desulphurization effect of bioleaching-flotation combined process
The coal desulfurization is of great significance to reduce air pollution and protect human health.In this study.In this study,A.ferrooxidans was used to bioleach coals with the particle size distribution of 0.075～0.150,0.280～400 and 0.500～1.000 mm,and the flotation desulfurization effect of coal after bioleaching was also explored.The results showed that the smaller the coal particle size,the higher the desulfurization efficiency of coal bioleaching,of which,the highest bioleaching desulfurization efficiency occurred for 0.075～0.150 mm coal,and the desulfurization efficiencies were 34.3％and 44.8％on day 7 and day 15,respectively.Combined with the flotation process,the total desulfurization efficiencies increased to 43.2％and 54.0％,respectively.The flotation desulfurization efficiency of coal with particle size distribution of 0.075～0.150 mm and 0.280～0.400 decreased with the increase of the pre-phase bioleaching desulfurization time,while the flotation desulfurization efficiency of coal with particle sizes distribution of 0.500～1.000 mm increased with the increase of the pre-phase bioleaching desulfurization time.In addition,the yield of clean coal for flotation desulfurization increased with the decrease of coal particle size.The research results can provide data support for improving the coal biological desulfurization process.
high sulfur coalA.ferrooxidansbioleaching desulfurizationflotation desulfurization
万方数据
维普
