·Coal mining and utilization account for 70∼80% of total carbon emissions in China 1 2 The total accumulation of coal based solid wastes gangue fly ash has exceeded 10 billion tons resulting in land resource waste and exacerbated carbon emissions in mines threatening the surface environments 3 4 5 Additionally the large scale extraction of
·As such this paper provides a detailed overview of the physical and chemical properties of coal gangue and its resource utilization methods in the environmental field particularly in soil remediation soil reclamation the preparation of adsorbents for heavy metals dyes and CO 2 and as catalysts for organic degradation and catalytic
The collected coal gangue block is first washed to remove impurities Then the raw coal gangue is crushed using a jaw crusher to achieve the aggregate with a particle size of 0 20 mm After crushing the coal gangue fine aggregate of mm mm and coarse aggregate of mm 20 mm were obtained sieving by automatic vibrating screen
·China s total coal production in 2021 exceeded billion tons 52% of the world s total Coal gangue a solid waste of coal mining accounts for 15 20% of coal production when directly discharged on the ground surface as waste heaps it occupies large areas of land and cause environmental pollution This paper summarizes the existing gangue backfilling
·The chemical stability of coal gangue varies depending on its composition with some minerals prone to weathering or dissolution under specific conditions releasing nutrients or potentially harmful substances High concentrations of heavy metals such as lead cadmium and mercury are often present posing key concerns for controlled
·The production of coal gangue a by product of coal mining and washing is rapidly increasing due to growing energy consumption As the accumulated coal gangue has not been appropriately utilized this has resulted in a squander of resources waste disposal problems and environmental pollution issues and carbon based chemicals and water
·To promote the utilization of coal gangue in structural engineering this paper presents a study on the coal gangue from five typical coal mines in the Northern Shaanxi mining area The physicochemical properties of coal gangue were analyzed and the influence of coal gangue coarse aggregate on the mechanical properties of concrete was studied The results
·By comparing coal gangue and soil properties chemical composition nutrient elements etc Wang et al pointed out that coal gangue can potentially be used as a fertilizer The soil surface application of coal gangue focuses on the role of partial replacement of soil for the improvement of soil nutrients thereby reducing the demand for
·The reuse of coal gangue for energy recovery is developing rapidly in China due to its advantage in achieving both economic and environmental benefits Low quality coal is often added to elevate the calorific value of the fuel In this paper the combustion characteristics as well as pollutant emissions SO2 and NO of coal gangue low quality coal and their blends at
·Abstract Among coal mining related wastes coal gangue CG is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining A thorough understanding of environmental concerns associated with the current model of
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