CoaI quaIity characteristics of No. Ⅱ1 coaI seam in ShiIin expIoration area of Hebi City

GUO Haiying

doi:10.13226/j.issn.1006-6772.2015.03.002

Abstract：In order to get knowledge of characteristics of coal quality and processing properties of No. Ⅱ1 coal seam in Shilin Exploration Area,Hebi City,and evaluate its industrial utilization application,81 coal core samples in 35 boreholes were collected,the chemical proper-ties,processing property and microlithotype of coal property of No. Ⅱ1 coal seam were investigated. The distribution of coal class and its metamorphic characteristics were analyzed. The results showed that,the vitrinite content of maceral in No. Ⅱ1 coal seam ranged from 59. 50% to 69. 20% ,with the max reflectivity of vitrain 1. 67% ~ 2. 01% ,ash content 16. 18% ~ 20. 28% ,calorific value 28. 40 ~29. 95 MJ/ kg,volatile matter 14. 73% ~ 15. 92% ,caking index 2 ~ 35,and grindability index 109 ~ 149. According to the current coal classification in China,the coal classes of No. Ⅱ1 coal seam were meager coal,meager lean coal and lean coal. The distribution of va-rious coal in different levels was that meager coal lay between faults F1 to F22 in the south,meager lean coal lay between faults F31 to F114 in central part,while the lean coal lay between faults F50 to F66 in the north. On the basis of hypozonal metamorphism,the coal seam was o-verlapped regional magmatic thermal metamorphism,which changed the degree of coalification to the high rank coal,mainly bituminous coal phase,and formed the belt shape distribution of meager coal - meager lean coal and lean coal. In which,meager lean coal and lean coal could be used as blended coal in industrial coking,while the meager coal was accord with the specifications of pulverized coal-fired boiler in power plant and blast furnace injection.