Abstract The coal gangue is a kind of solid waste produced and discharged in the process of coal exploitation and processing As one of the largest solid wastes coal gangue will not only occupy a lot of land but also do great harm to the local environment This paper summarized the achievement of the coal gangue comprehensive utilization technology in China and abroad
As a massive solid waste the high value added utilization of coal gangue has received more and more attention in China This study focuses on the utilization of coal gangue aggregate in railway engineering for coal transportation passage Coal gangue aggregate was employed as high grade railway subgrade filler andprepared concrete for roadbed drainage
The technical framework of filling goaf with coal gangue slurry The technology of filling goaf with coal gangue slurry is to make gangue into granular aggregate with a specific particle size
While the carbon content of CG is more than 20 wt % is a prerequisite Tan et al 2016 which restricts the comprehensive utilization of CG Brick making using CG is another important way of coal waste recycling utilization using a process of crushing screening aging molding pressing and firing
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
DOI / 364 Received Mar 20th 2021; accepted Apr 21st 2021; published Apr 28th 2021 Abstract The resource oriented and comprehensive utilization of coal gangue plays an important role in
The research aims to innovate an efficient underground disposal model for gangue contributing to the refinement of the technical system for the comprehensive disposal and utilization of gangue Underground backfilling stands out as a crucial technological strategy for the eco friendly and effective management of solid waste in mining operations
Coal gangue is a kind of significant byproduct during coal mining and coal preparation processes Due to the lack of effective comprehensive utilization methods a large amount of coal gangue cannot be effectively utilized and can only be stored on site especially in the northwest region of China The storage on site occupies lots of land resources and also causes severe
Coal gangue is one of the largest industrial solid wastes in China; the comprehensive utilization of coal gangue has important social economic and environmental benefits In this paper the coal gangue and comprehensive utilization have been discussed in detail Through the survey results expounds the development of the use of coal gangue and improve work with practical
Historical experience shows that a large number of coal gangue will be produce in the development of coal process B W Wang P M Study on Different Coal Rejects Features and Volcanic Ash Activity from Different Areas Coal Science and Technology 37 12 113 116 2009 Ye J W Shen G D Lu L Hazards and Comprehensive
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
To solve the problem of gangue discharge in coal mining fluidized gangue filling technology was developed The key scientific problem of this technology is the diffusion characteristics of the
Coal gangue CG an industrial solid waste with high contents of Li and Ga has attracted the attention of researchers However the utilization of CG remains an economic challenge Pre enrichment of Li and Ga by flotation was carried out with a view to improving the comprehensive utilization of CG Mineral composition time of flight secondary ion mass
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
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
Coal consumption brings a lot of coal fly ash CFA It requires interdisciplinary efforts in research policy and practice to improve the utilization of CFA Although there have been a lot of achievements in technological innovation the utilization of CFA is still difficult to match its output So it is urgent to explore how to guide its effective innovation This paper
Coal gangue is the largest amount of industrial solid waste in China It caused serious damage to the ecological environment and waste resources Therefore it is of great significance to realize the resource utilization of coal gangue protecting the environment and realizing the sustainable development of society This paper summarizes the utilization of coal
Therefore the main objective of this paper is to provide a comprehensive literature review of coal gangue utilization in building material production energy generation soil improvement and
Fig 2 shows the basic situation of comprehensive utilization of three typical CSW coal gangue fly ash and gasification slag in China from 2011 to 2021 It can be found that the output and comprehensive utilization of coal gangue and fly ash were fluctuating like coal output but the overall trend was increasing
Coal gangue CG which accounts for about 10 20 % of coal output is a kind of solid waste generated during the coal mining and washing processes According to Fig 2 the annual output of CG in China fluctuates between 600 800 million tons with a utilization rate hovering around 70 %
[Interpretation] This article requires the comprehensive utilization of solid waste The comprehensive utilization of solid wastes such as waste rock slag coal gangue tailings waste drilling mud rock cuttings scum oil sludge and other solid wastes reduces environmental pollution and ecological damage during mining 1 Downhole Backfill
Pollution control technology is the key to solve this problem So we analyzed it and divided it into three categories coal gangue prophylaxis and treatment technology of pollution and geologic hazard coal gangue hill vegetation restoration technology and coal gangue comprehensive utilization technology
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