粒度对煤中晶体矿物组成影响研究

Study on effect of coal granularity on crystalline mineral composite in coal

选取A/B/C 3种典型煤样,利用X-射线衍射分析仪研究了煤样在不同粒径区间时其晶体矿物组成的变化情况。结果表明,石英在A煤中其衍射强度随粒径增大呈下降趋势,而在B、C煤中则呈先下降后上升的趋势;高岭石衍射峰强度在A、B煤中是先下降后上升,而在C煤中呈直线下降的变化趋势。石英和高岭石在粒径为74～100μm时,其衍射强度为较低或最低的状态,而黄铁矿、赤铁矿和方解石则在此粒径区间范围内,其衍射强度达到较大或最大峰值;白云母总体变化幅度不是很大。

X-ray diffraction（XRD） were applied to study the crystalline mineral composite in different particle size interval of three typical coal samples.The results showed that the intensity of quartz presents downward trend in A coal,while falls and then rises in B and C coal samples with the coal diameters increasing.The intensity of kaolinite rising firstly,and then decreasing in A and B coal samples,which trend to down in C coal.On the whole,the intensity of quartz and kaolinite reached a minimum value when the particle size reached 74~100 μm,however,which reached a maximum of pyrite,hematite and calcite.As a whole,the intensity of muscovite had litter change.