煤中氯赋存形态的试验研究

Experimental research on present form of chlorine in coal

摘要: 采用艾氏卡熔样—硫氰酸钾滴定法,对我国41个煤中氯的含量进行测定,并研究了煤中氯含量与挥发分、固定碳、灰分以及碱金属的关系。结果表明,我国煤中氯含量普遍较低,一般为0.1%~0.2%;煤中氯含量与煤的煤化程度有明显关系,煤的变质程度越高,煤中氯的含量越少。煤中氯含量与煤中水分和氟的含量无关。随着煤中碱金属含量的增加,煤中氯含量呈下降趋势,煤中氯与碱金属(Na,K,Ca,Mg)等存在负相关性。煤中氯主要以有机形式存在。

Abstract: The concentrations of chlorine in 41 coal samples from China are determined by Ascaka-Volhad method.The result shows that Chinese coals are not chlorine-rich ones compared with those from other countries,which ranging commonly from 0.1% to 0.2%.Negative relationships have been obtained by carrying out studies on the relationship between chlorine content and coal rank,alkali metals.No relations are found between chlorine in coals with moisture and fluorine in coals.From the results,an association of chlorine with the organic fraction of coal has been inferred.