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Coal gangue is the largest output of industrial solid wastes in China The stockpiling of coal gangue is caused severe environmental impact for the ecological is important for resources conservation and environment protection to actively and comprehensively utilize of bulk quantity coal gangue
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
·Coal gangue an industrial solid waste discarded from coal mining and processing was used as the sole raw material to prepare brick The coal gangue was crushed homogenized milled and then pressed into green compacts The dried compacts were sintered at different temperatures for 2 h The obtained brick samples were characterized with X ray
·Coal gangue based geopolymer CGGP is one of the hot spots existing in the recycling of coal gangue resources due to its good comprehensive mechanical properties
·The amount of coal gangue a by product of coal mining and washing is rapidly increasing with the growing trend of energy consumption The accumulated coal gangue without appropriate utilization has resulted in a squander of resources waste
·1 Introduction The increased energy requirements on coal bring about mountains of coal gangue being generated annually all over the world Herein coal gangue refers to a solid waste generated in the processes of coal mining and washing which accounts for approximately 10 25% of the total coal production [1] Taking China for example various
Against the backdrop of achieving the goals of peak carbon emissions and carbon neutrality coal as the cornerstone of national energy security plays a crucial role in the green development of our country s economic construction and social development However during the process of coal mining and washing coal gangue as the primary associated by product of coal has
·Comprehensive utilization of coal gangue is of importance to sustainable development of society and economy China has made great progress in comprehensive utilization of coal gangue in the latest 40 years since the 1960—1970 s Circulating fluidized bed
·In this study the research aim is to enhance the activity index of activated coal gangue and study its activation mechanism The activation process of coal gangue was optimized through orthogonal tests and the Back Propagation BP neural network model was improved using a genetic algorithm With the effects of grinding duration calcination temperature and
·Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications Producing concrete with coal gangue aggregate is one of the green sustainable development requirements This paper reviews the properties and preparation methods of Chinese gangue aggregate studies the influence of gangue aggregate on
·Coal gangue is a kind of solid waste with a low calorific value produced in the process of coal mining and washing According to statistics by the end of 2019 China s accumulated amount of
·Top coal caving is a process for the rational extraction of large amounts of coal resources However this process readily causes release of excessive amounts of gangue during the coal release process The conventional technique which involves visual inspection is not only labor intensive but also can introduce inaccuracies Coal and gangue identification methods
·For example although China had introduced policies in 2013 and 2015 such as Management Measures for Comprehensive Utilization of Fly Ash and Management Measures for Comprehensive Utilization of Coal Gangue the Guojiawan Power Plant temporarily stacked more than million cubic meters of Rice noodles of fly ash occupying 660
·Oil and coal are abundant in China and it is a superiority for the development Coal gangue come from the course of coal exploitation and processing which is one of the solid wastes of industry biggest in emission of our country How to solve this environment pollution and effectively utilize the coal gangue is a main subject and difficult problem faced at present In
·The persistent reliance on coal has resulted in the accumulation of substantial coal gangue a globally recognized problematic solid waste with environmental risks Given the coal gangue properties and global land degradation severity the resourceful utilization of coal gangue as soil conditioners is believed to be a universally applicable cost effective high
·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
·In China coal gangue accounting for 1/10 even 1/5 of coal production is one of the major industrial and mineral residues The stock of coal gangue in China has reached a billion level with an increasing rate of 150 200 million per year [7] [8] How to utilize the stacked coal gangue is a serious topic in mining industry and construction industry
·Investigation into trace element partitioning behavior from a coal gangue fired power plant in Shanxi province China has been conducted and showed that Hg As Be and Cd were highly volatile elements in the combustion of coalgangue which were notably enriched in fly ash and may be emitted into the environment via the gas phase
·the process of making use of gangue were analyzed and some recommendations were put forward for these problems Keywords Coal Gangue Solid Waste Comprehensive Utilization Physic Chemical Property Pollution
·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
·Except for a small amount of comprehensive utilization 6 the rest of the coal gangue is mainly processed by stacking on the ground occupying a large amount of land resources and polluting the
·Cu Co Zn and Mn The Si component of coal gangue is suitable for producing silicon fertilizer while the presence of trace elements can promote crop growth and develop ment [13] which can improve resource utilization and reduce the pollution of coal gangue However since the silicon in coal gangue cannot be directly absorbed and uti
<p>Coal is the main energy in our country and the ballast stone of energy security As an inevitable product in the process of coal mining and coal washing coal gangue has an annual output of more than 700 million tons which is in urgent need of large scale and ecological utilization to solve the problem of coal gangue as a stumbling block in enterprise development
