中国煤中硫分分布特征的研究

Study on distribution of surphur content in Chinese coals

我国高硫煤的蕴藏量较多,在煤田开发中往往优先开采浅部煤层和低硫煤层,但随着工农业的迅速发展对煤炭需求量的不断增加,不少矿井已转入开采下部高硫煤层,特别是南方缺煤地区,高硫煤的开采比例更大。

based on in formation obtained from coal resources data bank 2nd petrographical microscope analysis this paper investigates distribution of surphur in Chinese coals, the occurrence morphology and embedded characteristics of pyrite in coal. It is found that sulphur content in Chinese coals tends to increase gradually from north to south. And sulphur content varies with different types of coal. Surphur content is the highest in fat coal. The general trend is that it increases gradually with degree of metamorphism. According to distribution of surphur formed in different ages, sulphur content of coal-bearing strata of late Carboniferous age in the north and of late permian age in the south intercalated deposit of marine and continental facies.The total surphur, in general, is over 2-6%. And the sulphur content of coal measures in continental deposits is mostly less than 1.5%. The occurrence of sulphur in coal is mainly pyrite which accounts for 2/3 of the total sulphur, and organic sulphur amounts to about 1/3. And. morphology of pyrite in Chinese coals is mostly individual agglomerated or nodular pyrite, partly disseminated pyrite, or intergrowth with organic matter. Therefore, most of sulphur can be separated by washing, and only part of coal is difficult to wash.