·The results showed that the mixed gangue samples of waste coal roadway gangue and rock gangue had low C content and low calorific value which could not be used directly as power generation fuel
·As a primary energy raw material in China coal holds an exceptionally high level of dependence Fig 1 illustrates that China is the world s largest coal producer and consumer In 2022 global coal production totaled billion tons with major contributions from countries such as China India Indonesia and America
·The results showed that the mixed gangue samples of waste coal roadway gangue and rock gangue had low C content and low calorific value which could not be used directly as power generation fuel
·During the combustion of coal particles with mean diameter ranging from 2 mm to mm a dense and a dilute phase zone appear In the dense phase zone the coal combustion fraction is larger so
·Coal is one of the main energy resources and coal mining is an important industry with great significance to the development of society and economy During coal mining and production one of the main by products is coal gangue CG accounting for 10% 25% of the total coal mining [1] CG is harder than coal but with low calorific value
·From Table 2 it can be observed that coal gangue with a calorific value in the range of 6270 12550 kJ kg −1 is commonly applied to power generation and fuels while its calorific value below 2090 kJ kg −1 usually could be used as a raw material in cement filler landfilling and other building materials 7 The meltability of coal gangue
·The treatment and utilization of coal gangue one of the main solid wastes produced during coal mining are of great significance in environmental protection and resource development In the contemporary context of the carbon neutralization strategy due to the property of the carbon in coal gangue it is necessary to be cautious of the carbon effect during
·As a low calorific value fuel full use of coal gangue s calorific value can be made to realize resource savings and sustainable utilization The research funding from the Young Talent Program of Hunan Provincial Science and Technology Program 801201048 Properties of coal gangue Portland cement mixture with carbonation Fuel Volume
·The rapid development of coal mining industry leads to the surge of coal gangue CG output which is a by product of coal mining and has become one of the largest solid wastes in China [1] At present the stock of CG in China has exceeded 7 billion tons which has seriously affected people s lives and social economic development [2] Long term storage of CG will even
·A systematic study of coal gangue as C30 concrete admixture were carried out CG is a mixture of carbonaceous argillaceous and sandy shale with low calorific value There is a certain amount of carbon in CG so removing the carbon in CG can not only continue to use carbon as an industrial product but also make CG have better performance in
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