chemical process in coal mining

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  Coal Mine Solid Waste Backfill Process in China: Current …

  202398 · Coal mine solid waste backfill is a coal mining method employed to safeguard subterranean and surface geological formations, as well as water resources, against impairment. It stands as a pivotal technical approach for realizing ecologically sustainable mining endeavors, aiming to address China’s predicament of ’three down’ …

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  Effects of recultivation on soil organic carbon sequestration …

  20221122 · Opencast coal mining results in high loss of soil organic carbon (SOC), which may be restored via recultivation. Common strategies include liming, topsoil application, and phytoremediation.

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  Water | Free Full-Text | Groundwater Hydrogeochemical Processes …

  20231120 · The area from Cishan to Pengcheng is a coal mining area, and the chemical type is mainly SO 4 ·HCO 3 -Ca. The water quality of the SPW in the east is obviously worse than that of DKW in the west.

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  Chemicals Used in Mining - Hesperian Health …

  20041015 · Crystalline matter forms through a series of physical and chemical processes such as fusion or partial melting of discrete mineral matter, and coalescence of melted mineral in the process of coal combustion.

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  Alkali Methods for Alumina Extraction from the By-products …

  2023825 · Large amounts of by-products, including coal gangue, circulating fluidized bed (CFB) slag, and coal fly ash (CFA), are generated during mining, washing and burning of high alumina coal (HAC). The stockpile of these by-products of HAC will cause the pollution of air, water and soil. Meanwhile, the unbalanced regional distribution of bauxite …

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  Breakthrough and innovative clean and efficient coal …

  202151 · The chemical reactions of coal pyrolysis, gasification, and liquefaction are mainly determined by the structure and reactivity of coal, while chemical engineering processes mainly include unit operations, reaction engineering, transfer processes, thermodynamics, kinetics, etc.

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  Review and prospects of mining chemical dust suppressant ...

  20221112 · Coal mine pollution is a serious threat to the mine safe production and occupational health of miners. Chemical dust suppression can effectively reduce the concentration of coal dust and suppress the re-entrainment of dust. This paper discusses the research progress of three kinds of traditional dust suppressants: the wetting-type, …

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  Progress in coal chemical technologies of China - De Gruyter

  China’s unique energy reserve structure abundant in coal and scarce in crude oil and natural gas has promoted heavy investment on the research and development of clean coal chemical technologies during last two decades, which has turned China into a heartland for demonstrating, developing, and commercializing virtually every aspect of new coal …

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  Analysis of Risk Factors of Coal Chemical Enterprises Based on Text Mining

  2023128 · It proposes a text mining method to automatically identify the critical risk factors hidden in the accident report, which can help enterprises find valuable information and implicit knowledge. A specific dictionary in the field of the coal chemical industry is established, which plays a vital role in the text mining workflow.

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