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Coal gangue, as a type of solid waste discharged during coal mining and coal washing, occupies a large amount of land resources owing to accumulated gangue, which eventually results in ecological ...
The calorific value of coal gangue refers to the amount of energy that can be released from complete combustion of coal gangue per unit mass under certain conditions, and it usually increases with increasing carbon mass fraction and volatile fraction and decreases with increasing ash fraction [24].The meltability of coal gangue refers to the …
Coal gangue is a rock mixed with organic and inorganic compounds co-deposited with coal during coal formation. Usually in a thin layer and in the coal seam or in the top and bottom of the coal seam, gangue is typical solid waste discharged when coal is excavated and washed in the production. ... Policies and ethics. Search. Search by …
China's total coal production in 2021 exceeded 4.13 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 ...
A modified YOLOv4 model, named GYOLO, for coal gangue recognition is proposed with the aim of reducing model parameters, improving calculation speed, and reducing equipment requirements. This paper proposes a modified YOLOv4 model, named GYOLO, for coal gangue recognition with the aim of reducing model parameters, …
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 …
Coal gangue has become one of the industrial wastes with the largest annual discharge and accumulated stock in China. The disorderly accumulation of coal gangue not only occupies a large amount of land resources and causes natural disasters, but also pollutes the surrounding ecological environment, which in turn affects human …
Based on the source and distribution of coal gangue (CG) in China, this study introduces the current situation of CG storage in China and the problems existing …
Abstract Thermally activated coal gangue and lanthanum-modified coal gangue were prepared by thermal activation and hydrothermal methods, respectively. Their structures and properties were characterized by X-ray diffraction (XRD), attenuated total reflection flourier transformed infrared spectroscopy (ATR-FTIR) and transmission …
Coal gangue has become a significant industrial solid waste because it pollutes the environment and is prone to spontaneous combustion. Recycling is the way of the future. This blog aims to explore 8 effective and environmentally friendly ways to maximize the value of coal gangue. 1. Coal gangue replaces clay to make cement
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 …
A large amount of coal gangue generated during coal production and processing is piled up on the surface, which not only causes land occupation and soil erosion, but also causes geological disasters such as landslides and debris flows. So it has a serious impact on the ecological environment of the mining area. The cumulative stockpile of coal gangue in …
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 …
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 …
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 …
Accurate and rapid recognition of coal and gangue is an important prerequisite for safe and efficient mining in top coal caving face. In this article, a novel coal-gangue recognition method is put forward based on an improved antlion optimization (IALO) algorithm, variational modal decomposition (VMD), and an improved MobileNetV2 network. First, …
Uniaxial compression tests were conducted on sandstone-CGFB composite samples with different interface angles, and their strength, acoustic emission (AE), and failure characteristics were investigated. Three macro-failure patterns were identified: the splitting failure accompanied by local spalling failure in CGFB (Type-I), the mixed failure with …
DOI: 10.1016/j.pnsc.2024.02.012 Corpus ID: 268401715; Environmental hazards and comprehensive utilization of solid waste coal gangue @article{Zheng2024EnvironmentalHA, title={Environmental hazards and comprehensive utilization of solid waste coal gangue}, author={Qinwen Zheng and Yi Zhou and Xin Liu …
Coal gangue, a by-product produced during the coal processing, has a serious impact on the environment. Using coal gangue as a fertilizer has been proven helpful in potentially reducing its environmental impact and improving its value. In this study, the formation mechanism and influencing factors of coal-gangue-based silicon fertilizer …
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 …
Based on the greening and low interference disposal requirements of coal gangue in high-yield and high-efficiency mines in Inner Mongolia and Shaanxi, and by integrating the existing theories and ...
China's coal resources are extremely rich, and the degree of coal mining is high. During the formation of coal, a large amount of coal gangue will be produced, which not only accumulates land and wastes resources, but may also cause natural disasters such as fires. In this paper, coal gangue is used as the main raw material, and a certain …
Starting from the resource characteristics of coal gangue, this paper systematically discusses the ways and research status of coal gangue resource utilization, mainly including: extracting and recovering …
Among the fossil fuels, coal is a primary contributor to global GHG with substantial emissions generated during its mining and combustion process. Coal …
The coal gangue is a kind of solid wastes from coal mining and separating,which is also a kind of grey-black rock harder than coal,characterized by low content of carbon and association with coal seams during coal accumulation.The impact of coal gangues on the environment has been expounded in the paper,and the comprehensive utilization …
Traditional Coal Gangue Separation Process and Equipment. Water washing and dry coal preparation are the main parts of coal preparation. Spiral separation, jigging, heavy medium separation, and other processes are water washing processes, which have the advantages of mature technology, high separation accuracy, and large processing …
Coal gangue has accumulated huge coal gangue piles, occupying lots of land as well as having striking influence on the neighboring environmental effects. This paper seeks a new way of coal gangue treatment in which the coal gangue blended with shale and sludge was sintered in rotary kiln to form lightweight aggregates.
Possibility of cemented gangue backfill was studied with gangue of Suncun Coal Mine, Xinwen Coal Group, Shandong, and fly ash of nearby thermal power plant, in order to treat enormous coal gangue on a large scale and to recovery safety coal pillars. The results indicate that coal gangue is not an ideal aggregate for pipeline gravity flow …
Currently the main method of mine solid waste disposal and utilization is to apply gangue to underground filling. For the grading characteristics of coal gangue in the hollow zone in underground ...
Coal gangue, which is mainly generated during coal excavation, mining, and coal washing, is an industrial solid waste that is recognized as an environmental pollutant. The ever –