宁夏任家庄煤矿9^#煤层煤质及元素分布特征

Characteristics of coal quality and element distribution in 9^#coal seam of Renjiazhuang coal mine in Ningxia

煤层煤质和元素分布特征研究对煤炭洁净利用具有重要意义。对宁夏任家庄煤矿9#可采煤层进行采样测试,分析煤层煤质变化和微量元素分布特征。结果表明:任家庄煤矿9^#煤层属于高挥发分、低灰-中灰、中-高硫气煤。煤层中硫的赋存形式以有机硫为主,灰成分以酸性氧化物为主,且灰成分指数较低,表明成煤环境为还原性。煤层属轻稀土富集类型,煤层REY曲线总体上表现出右倾、负Eu异常V型谷的特征。煤中Li含量分别是中国煤和世界煤中Li含量的2.97倍和7.86倍,煤中Li具有一定的综合开发潜力。

The study of coal quality and element distribution characteristics in coal seam is of great significance to the clean utilization of coal.Sampling test is conducted on 9#mineable coal seam in Renjiazhuang coal mine,Ningxia province,and detailed analysis of coal quality changes and trace element distribution characteristics of 9#coal seam.The results show that the 9^# coal seam is a high-volatile,low-ash-medium ash,and medium-high sulfur gas coal from Renjiazhuang coal mine.The occurrence of sulfur in coal seams is mainly organic sulfur,the ash component is mainly acidic oxide,and the ash component index is low,indicating that the coal-forming environment is reducing.The coal seam is a light rare earth enrichment type,and the REY curve of the coal seam generally shows a right-dip and negative Eu anomalous V-shaped valley.The Li content in the 9^# coal seam is 2.97 times and 7.86 times the Li content of Chinese coal and world coal,respectively,and is certain potential for comprehensive development.