Study on comprehensive evaluation of coal quality characteristics of special coal resources in Ningxia

Comprehensive utilization with different coal quality is considered to be the key issue of the future coal development，and it is coal’s only way out under the status of reducing coal production.Study of the evaluation of special coal quality in Ningxia is not enough.In this paper，the quality and distribution characteristics of special coal resources in Ningxia were evaluated by coal quality analysis of 14 samples of 9 coal mines in Ningxia.Good reactivity of coal and CO₂ includes Qingshuiying/Zaoquan/Wangwa 1#/Jingfeng and Yangchangwan.Coal resources suitable for gasification in Ningxia are mainly distributed in Ningdong area.According to coal quality request of direct liquefaction，the matching degree of Jinfeng coal mine is the highest，0.81.Special coal resources suitable for direct liquefaction in Ningxia are mainly distributed in Majiagou mining area.Dafeng 2# coal in Shitanjing mining area contains associated beneficial elements.The content of Sc，Ga and Th in Dafeng is higher than the average content in China and United States.Part of the coal in Ningxia has harmful elements.Wangwa1 5# is high-phosphorus，lead and fluoride content enrichment in Jinfeng and Renjiazhuang 3#.Compared with other parts of China Baijigou and Dafeng coal has low water content，low ash and low sulfur，high calorific value and high strength of falling strength.It is an internationally recognized scarce and precious coal resource.