中国煤中硫含量分布特征及其沉积控制

基于全国煤炭资源潜力评价最新研究成果,结合前人研究结果,采用保有储量加权平均法,分析了我国煤中全硫和形态硫的地质分布和行政区分布规律,讨论了影响煤中硫含量分布的地质原因。结果显示:我国煤中硫含量变化范围大,以特低硫煤和低硫煤为主,全硫含量的保有储量加权平均值为1.14%;晚二叠世、早石炭世和晚石炭世煤中全硫含量较高,早—中侏罗世煤最低;华南赋煤区煤中硫分含量最高,西北赋煤区煤中硫分最低,以浙、赣、渝、桂为界,煤中硫分有从西北向东南方向逐渐升高再降低的趋势;高有机硫煤主要分布于华南晚二叠世及华北晚石炭世煤层;煤中硫含量高低显著受到沉积环境的影响,受海水影响的煤及海陆交互相沉积的煤层硫分较高,陆相沉积的煤层硫分较低。

Occurrence and sedimentary control of sulfur in coals of China

Based on the latest research results from the project of Chinese potential coal resource estimation and previous studies，the geological and administrative district distribution laws of total sulfur and the forms of sulfur in Chinese coals were discussed using the calculation method of weighted average of recoverable deposits.Furthermore the geological causes which impacted on the sulfur content were discussed.The results show that the range of sulfur content in the coals of China is relatively wide and the special low sulfur coal and low sulfur coal account for a large propotion.The weighted average of recoverable deposits of sulfur in Chinese coals is 1.14%.Total sulfur content of the Late Permian，the Early Carboniferous and the Late Carboniferous coal is higher，while that of Early to Middle Jurassic coal is the lowest.The weighted average of recoverable deposits of sulfur in coals of southern China coal-forming area is the highest while that of western China coal-forming area is the lowest.Furthermore，bounded by Zhejiang，Jiangxi，Chongqing and，Guangxi，the sulfur in coal gradually increases and then decreases from northwest to southeast.The high organic sulfur coal is mainly distributed in Late Permian coal in southern China and in Late Carboniferous coal in northern China.The sulfur content in coal is closely related to the sedimentary environment.The sulfur content in coal which influenced by seawater is higher.It is also higher in case that the coal formed in marine-terrigenous depositional environment.While formed in continental sedimentary environment，the sulfur in coal is lower.The results provide a basis for a rational arrangement in coal exploitation and utilization.