陇东南地区5号煤中微量元素赋存特征

Occurrence Characteristics of Trace Element in No.5 Coal Seam of Long South-east Area

通过对陇东南地区5号煤层煤样的显微煤岩组分分析、工业分析以及微量元素分析统计,得出该研究区内镓元素含量与灰分产率、煤灰中Al2O3和SiO2呈正相关,由于受陆源碎屑影响,主要以无机态赋赋存于粘土矿物之中;砷含量随煤中全硫增长而增大,以有机结合态存在;磷元素以无机态为主,与煤中全硫、砷元素含量正相关。

The coal samples in the No. 5 coal seam drilling in the Long South-East basin were analyzed with the methods of maceral analysis, proximate analysis and the analysis of the microelement were given. The results showed that there was close relation between Gallium and ash content. Gallium positively related to AL2o3 and SiO2, were affected by terrigenous clast and major parts found in clay minerals. The arsenic increased with total sulfur, and mainly existed in the organic combination state. Phosphorus was given priority to with inorganic state, and was related with the total sulfur and arsenic content in coal