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为脱硫、降硫提供科学理论依据，本文选择了内蒙古乌达矿务局９号煤层和１０号煤层为研究对象，系统地研究了煤中硫的形成及其分布的控制因素。结果表明：煤中硫含量的变化主要受控于泥炭聚积期沉积环境的变化，乌达矿区９号煤层和１０号煤层是在海侵的背景下形成的，在泥炭聚积期，由于不同水系的发育，控制了煤层间距的变化，更重要的是控制了煤中硫含量的分布，在海水影响下聚积的泥炭比在淡水环境聚积的泥炭含更多的硫。中硫煤和高硫煤中硫的来源主要是侵入泥炭沼泽的海水中的硫酸盐。另外，据研究结果，提出了乌达矿区煤中黄铁矿和有机硫化合物的形成模式。
In order to provide a scientific basis for desulphurization and sulfur reduction, this paper chose No. 9 coal seam and No. 10 coal seam in Wuda Mining Bureau of Inner Mongolia as the research object, and systematically studied the formation and distribution of sulfur in coal. The results show that the change of sulfur content in coal is mainly controlled by the change of sedimentary environment during the peat accumulation period. The No.9 and the No. 10 coal seams formed in the background of sea transgression. During the peat accumulation period, Developed and controlled changes in coal seam spacing and, more importantly, the distribution of sulfur in coal, peat accumulated under the influence of seawater contained more sulfur than peat accumulated in freshwater environments. The sources of sulfur in medium-sulfur coal and high-sulfur coal are mainly sulphates in seawater that intrude into peat swamps. In addition, according to the research results, the formation patterns of pyrite and organosulfur compounds in coal from Wuda mining area are proposed.