矿物在煤粉中的分布规律研究

STUDY ON THE DISTRIBUTION OF MINERALS IN PULVERIZED COALS

本文采用浮沉法研究了矿物在煤粉中的分布规律。结果发现,密度级别反映了矿物在煤粉中存在状态。随着密度级别提高,无烟煤煤粉中有机显微组分种类和含量不发生变化,烟煤煤粉中镜质组含量下降、惰质组含量升高,壳质组含量较低,略呈下降趋势,而褐煤煤粉中镜质组含量升高、壳质组含量下降,而惰质组含量几乎不发生变化。所有煤粉中无机矿物种类分布规律相似,内在矿物均以粘土矿物为主,以黄铁矿为辅,而外在矿物种类齐全,但仍以粘土矿物为主。无烟煤和高灰分烟煤煤粉中矿物几乎均匀存在于各密度级别中,而中等灰分的烟煤煤粉中矿物以独立存在为主,而褐煤中矿物与有机质均匀交织在一起。

The distribution of minerals in pulverized coals has been studied with density separation method.It was shown that the existence of minerals can be reflected with density fractions.It was found that the maceral compositions of different pulverized anthracite fractions hardly change with their densities,while the contents of vitrinite decrease,those of inertinite increase and those of liptinite slowly decrease with growing density fractions of pulverized bituminous coals.For pulverized lignite, the contents ...