鄂尔多斯盆地煤的灰分和硫、磷、氯含量研究

详细阐述了鄂尔多斯盆地煤的灰分产率和硫、磷及氯含量的空间及垂向分布规律，并探讨了煤中硫。磷及氯含量的影响因素。研究结果表明，石炭-二叠纪煤以中灰煤为主，部分为高灰煤；低灰煤仅分布在局部地区，且灰分产率与全流呈负相关；延安组以特低灰—低灰煤为主，中灰煤次之，空间上灰分北高南低、东高西低；太原组以中高硫煤为主，山西组则以低硫煤为特征，空间上呈南高北低、西高车低之趋势；延安组亦以低硫煤为主。煤中形态硫以黄铁矿硫为主，有机硫次之，硫酸盐硫极少。从太原组到山西组再到延安组，煤中硫呈递减趋势，这与聚煤环境的变化密切相关。该盆地煤含磷低，少部分为特低磷煤。煤中氯的质量分数值平均为425．8×10-6，空间上中南部高、北西部低；垂向上，下部煤层中氯的含量高于中上部煤层，这可能与煤中氯的成因有关。

A STUDY ON ABUNDANCES AND DISTRIBUTION OF ASH YIEID,SULFUR, PHOSPHORUS AND CHLORINE CONTENT OF THE COALS FROM ORDOS BASIN

The abundances and distribution of ash yield, sulfur, phosphorus and chlorine contentof the coals from Ordos Basin have been detailed, and the factors affecting the contents and distribution of sulfur, phosphorus and chlorine content of eds have been probed into as well. Thestudy results indicate that the Permcr-Cardriiferous anls are characterized by medium ash coalsand partly high ash coals, and the ash yield is negatively correlated with the total sulfur content; coals from Yan' an Formation are dondnated by very low-low ash, secodly by mediumash, high-in-north and fow-in-south or high-ineast and low-in-west. thes from Taiguan Forrnation are charaterized by mediurnhigh sulfur content, while coals from Shanxi Formatdri aredowhnated by low-very low sulfur, and display the trend of low-in-north and high-in-south orlow-in-east and high-in-west; coals from Yan' an Formation are charaterized by low-very lowsulfur. The sulfur forms in eds are preddrinated by pyritic sulfur, Secondly by organic sulfur.The abundance of total sulfur in coals decreases in the order of Taiyuan, Shanxi and Yan' anFormations, which is closely corrlated with the vallations of coal-forming envirorunnts. Thephosphorus in eds is low-very low. The average content of chlorine in Mesozoic coals frorn thisbasn is 425. 8×10-6, charaterized by high-in-central-south and lowin-northwest from theplane view, more chlorine in lower coal searn than upper coal seams longitudinally, which maybe correlated with the genesis of chlorine in coals.