Research progress on geochemical characteristics of minerals in coal
In view of the practical problems of clean and efficient utilization of coal resources in China,studying the geochemical characteristics and transformation behavior of minerals in coal can improve the removal rate of minerals and the effective conversion rate of coal matrix in clean and efficient utilization of coal.From the perspective of geo-chemistry,the definition,genesis,combination distribution,occurrence characteristics,content abundance and re-lationship between minerals in coal are expounded.The technical means needed to explore the physical and chemical properties of minerals in coal are summarized.From the characterization of spatial structure by microscope imaging to the qualitative and quantitative characterization of mass spectrometry,spectrum and energy spectrum,the advantages and disadvantages of specific detection methods are summarized.Based on the study of the thermal evolution of miner-als in coal,the controlling factors of the occurrence and enrichment of minerals in coal are discussed from the geolog-ical point of view,and the effects of terrigenous clastic materials,sedimentary environment,coal-forming plants,magmatic hydrothermal activities,groundwater activities and weathering on the accumulation of minerals in coal are summarized.The migration and transformation of minerals with different genesis in different thermal evolution proces-ses of coal are also different.The thermal migration characteristics of minerals in coal combustion,gasification,liq-uefaction and coking are summarized,and the geochemical characteristics of minerals in coal are interpreted from the perspective of geochemistry.From the perspective of geochemistry,it is proposed that there is still specific and de-tailed space for the study of geological control of the dissemination characteristics and dissociation characteristics of minerals in coal and the relationship between mineral removal effect and coal-forming environmental factors.Based on the geochemical information of coal profiles,the geological effects are divided.Combined with the study of the dis-semination types and dissociation characteristics of minerals in the process of coal utilization,it is revealed that the geological factors controlling the removal effect of minerals are exploratory.With the increasingly prominent character-istics of potential mineral resources in coal,the special properties of nano-minerals in coal can be used as a good me-dium for studying coal geology and coal geochemistry.
minerals in coalgeochemical characteristicsgeological factorsnano mineralthermal evolutiondissemination typesdissemination characteristics
国家科技期刊平台
NSTL
万方数据
