微生物预处理浮选脱硫对煤样热值的影响

Effect of microbial pretreatment and floatation desulfurization on the heating value of coal samples

分析粒度分别为<0.2mm、<0.5mm、0.2～0.5mm、0.5～1.0mm、<1mm的煤样脱硫前后的热值、灰分、全硫、碳、氢等的变化情况,指出随着脱硫率上升,热值变化逐渐增大;煤样的精煤回收率与热值变化量间没有明显变化;热值变化与氢质量分数变化没有明显的正相关关系,而热值变化与碳质量分数变化有明显的正相关关系。

This paper analyzes and studies the heating value of coal samples and the ash content ,total sulfur ,carbon and hydro-gen etc.in coal samples with the granularity of<0.2mm,<0.5mm,0.2～0.5mm,0.5～1.0mm,<1mm before and after desulfur-ization.It concludes that,the change of heating value gradually increases with the raising of desulfurization rate;there isn't evident change in the correlativity between the recovery ratio of clean coal and the variation of heating value;there isn't evident positive correlativity between the change of heating value and the change of hydrogen mass fraction,while the evident positive correlativity exists between the change of heating value and the change of carbon mass fraction.