Comprehensive utilization and environmental risks of coal gangue: A review

Investigation of combustion characteristics and kinetics of coal gangue with different feedstock properties by thermogravimetric analysis

Combustion behavior, kinetics, gas emission characteristics and artificial neural network modeling of coal gangue and biomass via TG-FTIR

Thermal conductivity of cement paste containing waste glass powder, metakaolin and limestone filler as supplementary cementitious material

Coal mining and washing is accompanied by the production of large amounts of coal gangue, which exerts a notable influence on the natural environment. However, as a form of solid waste, coal gangue exhibits a wide range of potential applications in the field of recycling. Nowadays, 'the utilization rate and quality of coal gangue are inadequate, and the disposal capacity and scale of coal gangue obviously cannot meet the current global low-carbon environmental protection requirements. The paper presents an overview of the present state of coal gangue production and utilization, and investigates the environmental impact caused by the practice of stacking coal gangue. We emphasize the current research status of gangue in various high-value application fields, including environmental materials, agricultural production, construction materials, recovery and extraction of valuable elements, and energy generation. It highlights the significance of pre-treatment methods like activation, modification, and innocuousness for the comprehensive utilization of gangue. Additionally, we briefly introduce and discusses the future directions of research and development in this area. Nevertheless, with regard to the environmental impact of secondary contamination and the efficiency of gangue utilization, there remain numerous obstacles and unresolved matters that merit further investigation. It is believed that this review can offer valuable insights into the utilization of gangue development methods, and expedite the successful implementation and practical application of large-scale treatment and disposal of solid waste. 

Environmental hazards and comprehensive utilization of solid waste coal gangue

This paper provides an overview on the current status of power generation in China using coal gangue. The government regulation towards the use of coal gangue for power generation is introduced. Emission of pollutants and low thermal power plant efficiency are the two major problems for the power industry firing coal gangue. Particulate matter emission control is a problem due to the high ash content. Sulfur emissions from these units are easily controlled mostly through lime/limestone injection and in-situ capture. Overall, efficient power generation using coal gangue is a promising approach to reduce the use of coal resources and reduce the environmental impacts.

Power generation from coal gangue in China: current status and development

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Power generation from coal gangue in China: current status and development