煤矸石资源高值化利用研究进展

当前我国煤矸石存量和排放量大、产量高度集中、高附加值利用占比小，环境影响突出，是大宗固体废弃物综合利用的核心领域，资源化利用前景广阔。现有对煤矸石的处置能力和规模明显不能满足国家对生态环境保护及“双碳”目标下煤炭综合利用的相关要求。通过介绍煤矸石的物理、化学性质，指出了煤矸石在高值化利用中存在的涉及政策、供求、产业化和环境的问题。着重阐述了煤矸石在建筑材料、地质聚合物、化工产品、新型材料、土地复垦等方面的高值化利用现状，并对其未来的应用前景进行了讨论，提出了煤矸石高值化利用的重点研究方向。以期能够实现煤矸石的高质、高值、高效、绿色发展，不断增加煤矸石综合利用产品的附加值，增强煤矸石高值化利用产业核心竞争力。进一步推进煤矸石资源高值化利用效率，对环境质量的改善、经济社会发展的全面绿色转型具有重要意义。

Research progress of high-value utilization of coal gangue resources

The coal gangue in China is the core field of bulk solid waste comprehensive utilization due to its massive stock and emission, high concentration of output, small proportion of high-value-added utilization, and outstanding environmental impact. Hence, the prospect of resource utilization of coal gangue is broad. The existing disposal capacity and scale of coal gangue obviously dissatisfy the national ecological environmental protection and "Double Carbon" target under the comprehensive utilization of coal related requirements. By introducing the physical and chemical properties of coal gangue, this study pointed out the problems involving policy, supply and demand, and industrialization and environment in the high value utilization of coal gangue. This paper highlighted the current situation of high-value utilization of coal gangue in construction materials, geopolymers, chemical products, new materials, and land reclamation, and further discussed the future application prospects of coal gangue, proposed the key research direction of high-value utilization of coal gangue. The above review aimed at achieving the high quality, high value, high efficiency and green development of coal gangue, continuously increasing the value added of coal gangue comprehensive utilization products, and enhancing the core competitiveness of coal gangue high value utilization industry. Further promoting the high-value utilization efficiency of coal gangue resources is essential for the improvement of environmental quality, the overall green transformation of economic and social development.