贵州煤中氟赋存形态分析

Analysis on Fluorine Speciation in Coals From Guizhou Province

采用高温水解-离子色谱法,对中国贵州11种煤中氟的含量进行测定,并研究了贵州煤中氟含量与挥发分、灰分、氯含量、三态硫含量以及碱金属的关系。结果表明,贵州煤中氟含量普遍较高,最低为166.99mg/kg,最高为1614.46mg/kg,平均为715.20mg/kg,高于全国的平均含量;贵州煤中氟含量与煤化程度无关,与灰分也无相关性;煤样中氟的含量与氯的含量无相关性,而与有机硫呈现明显正相关;随着煤中碱金属含量的增加,煤中氟含量呈上升趋势,煤中氟与碱金属(Na,K,Ca,Mg)总量存在正相关关系。贵州煤中氟主要以无机形式存在。

The fluorine concentration in 11 coal samples from Guizhou province were determined by pyrohydrolyticion chromatography method, and the correlations between F and Vdaf, Aad, Mad, Cl, three species of sulfur and alkali metals in Guizhou coals were studied on. The result shows that the fluorine concentration is very high in the coals from Guizhou province, from 166.99 to 1614.46 mg/kg, with an average of 715.20 mg/kg, which are generally higher than the average of fluorine concentration in Chinese coals. The fluorine concentration is independent of coal rank; and the fluorine concentration doesnt depend on the ash content. There is no correlation between fluorine and chlorine. Fluorine is positively correlated with organic sulfur and alkali metals（Na, K, Ca, Mg）. The inorganic species is the primary form of fluorine existence in coals from Guizhou province.