INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Present Situation and Prospect of High Value-added Functional Modification Technology of Coal Gangue Under the Background of ‘Carbon Peaking and Carbon Neutrality Goals' |
SUN Zhihui, ZHAO Shuai*
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School of Mines, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China |
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Abstract As the main associated products in the process of coal mining and washing, coal gangue emissions account for more than 40% of the solid waste in mining areas. And it has been listed as one of the bulk solid wastes of focus attention in the ‘14th Five-Year Plan'. In recent years, driven by the goal of peak carbon dioxide emissions and carbon neutrality, the problem of coal gangue reuse has been paid more and more attention. At present, the comprehensive disposal of coal gangue in our country mainly includes underground use, road construction, che-mical raw materials and ecological protection. With the progress of large modern mine construction and the development of low carbon sustainable economy, coal gangue shows the trend of large-scale and high value use. However, the comprehensive utilization rate of coal gangue is still less than 60%, and a more standardized and in-depth research system on comprehensive utilization and disposal of coal gangue has not yet been formed. The latest development of research on high-value utilization of coal gangue at present stageis comprehensively sorted out, the principle of existing functional modification methods of coal gangue is summarized, and the application status, effects, pros and cons of various high-value utilization technology for coal gangue are deeply analyzed. At the same time, based on the progress and effect of previous research, we also put forward the research ideas of geothermal energy storage and solid carbonation functional filling of gangue, which provide promising carbon reduction strategies for carbon neutrality in coal mining.
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Published:
Online: 2023-09-06
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Fund:Fundamental Research Funds for the Central Universities (2022QN1003) and the China Postdoctoral Science Foundation (2021M703495). |
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