Environmental hazards and comprehensive utilization of solid waste coal
Coal gangue power generation is presently the primary method of comprehensively utilizing coal gangue to achieve economic profits [157]. Coal gangue is composed of carbon and other flammable substances, which can produce heat when burned. This heat can be utilized for the purposes of power generation and heating [158]. …
Using Chinese Coal Gangue as an Ecological Aggregate 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.
Materials | Free Full-Text | Application of Coal Gangue as a …
Among the techniques for converting stacked coal gangue to reusable material, one of the most effective ways is to use coal gangue as a coarse aggregate in green concrete productions. The physical and chemical properties of rock and spontaneous-combustion coal gangue are generally suitable for being used as a coarse …
Analysis of Coal Gangue Used to Produce Green Materials
Coal gangue is kind of discharge materials in process of excavating coal deal of picking coal.With the long time stacking,coal gangue may not only engrosses a great deal of land but also pollutes the air and underground water and induces spontaneous combustion.Producing green materials by using coal gangue can save much soil and …
Review of Coal Gangue Characteristics and Ecological …
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 health and …
Reactivity activation of waste coal gangue and its impact …
Coal gangue is the main industrial solid waste that is physically separated from bulk coal during coal preparation. In China, the deposition amount of coal gangue is over 500 million tons with an annual production of more than 70 million tons. Extensive studies have been carried out to find a feasible way to reuse coal gangue in cement …
Using Chinese Coal Gangue as an Ecological Aggregate 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, studi …
Coal gangue recognition based on spectral imaging …
The identification of coal gangue is of great significance for its intelligent separation. To overcome the interference of visible light, we propose coal gangue recognition based on multispectral imaging and Extreme Gradient Boosting (XGBoost). The data acquisition system is built in the laboratory, and 280 groups of spectral data of coal …
Identification and Activation of Coal Gangue and …
Gangue, a typical waste associated with the coal mining process in northern China, was characterized before and after thermal treatment by XRF, XRD, TGA-DSC, and SEM. The pozzolanic reactivity of calcined gangue with different calcined temperature was tested by standard mortar strength and R3 calorimetry test. The performance of blended cement …
Application of Coal Gangue as a Coarse Aggregate in Green …
2. Utilization of Coal Gangue. For years, researchers have been working on the effective utilization of the enormous stocked coal gangue. In China, more than a half of discharged coal gangue is used for land reclamation—one third of that is used for power generation and the rest is used for producing building materials [2,4].However, the main …
Coal gangue detection and recognition algorithm based on …
In coal mining, a large amount of coal gangue is mixed with raw coal, and it easily causes pollution and reduces the raw coal's combustion heat; therefore, gangue separation is an essential step in improving the quality of raw coal .
Effect and mechanism of coal gangue concrete modification …
Effect of raw coal gangue coarse aggregates on mechanical properties and compressive stress–strain response of concrete. Raw coal gangue (RCG) as one of the solid wastes can result in serious ecological and environmental pollution. Utilization of RCG as coarse aggregates in concrete can mitigate the demand for natural….
Using Chinese Coal Gangue as an Ecological Aggregate and …
Coal gangue is a kind of hard rock produced during coal mining and, it commonly comprises limestone, claystone, and to a lesser extent, shale and volcanic rocks. It has low carbon content and generally accounts for about 10% of coal output and 25% of China's industrial waste discharge [4,5].
Co-combustion and emission characteristics of coal gangue …
Coal gangue is a problematic by-product generated from the process of mining and beneficiation of coal. It approximately accounts for 10–15 mass % of coal production [].Huge quantities of coal gangue has been stockpiled during decades of coal production and cause severe environmental impacts, such as acid drainage, heavy …
Coal-gangue recognition via multi-branch convolutional …
Traditional coal-gangue recognition methods usually do not consider the impact of equipment noise, which severely limits its adaptability and recognition accuracy. This paper mainly studies the ...
Excess sulfur and Fe elements drive changes in soil and
Coal mining is indispensable due to the widespread use of coal, and gangue is the accumulated solid waste byproduct that persists in mined lands, even after the mines have been abandoned 1.
Comprehensive utilization and environmental risks of coal …
Coal gangue, a solid waste generated during coal mining and washing, accounts for approximately 10%–15% of the total coal production. The accumulative …
Research of Comprehensive Utilization of Coal Gangue
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 this paper, we performed a comprehensive analysis of ...
Preventing water inrush hazards in coal mines by coal gangue …
Coal gangue is the solid waste generated during the excavation of tunneling or washing of raw coal, and its emission is about 15–20% of the raw coal production (Li and Wang 2019). At present, China's coal gangue accumulated 6 billion t, of which as many as 1500 gangue mountains of large scale, occupy 13,000 ha of land (Song et al. 2022 ).
Full article: A review of intelligent coal gangue separation …
Intelligent coal gangue separation equipment has the advantages of fast speed, high precision, strong modularity, and integration scalability. It also has the …
Identification and Activation of Coal Gangue and …
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. In China, the total of accumulative stockpile of …
Research Progress on Comprehensive Utilization of Coal …
Coal gangue is one of the largest mine solid wastes in China, and its discharge and stockpiling have caused resource waste, environmental pollution and other …
Characterization studies on coal gangue for sustainable …
Coal gangue, a residue produced during the coal mining process, has found sparse utilization in civil engineering applications.
Full article: A review of intelligent coal gangue separation …
Therefore, reducing the amount of coal gangue in raw coal is one of the necessary ways to achieve efficient clean utilization of coal resources and ensure the development of clean, low-carbon, and green energy in our country. In coal mining, the automatic removal of coal gangue is an important link in modern coal production and …
Comprehensive utilization and environmental risks of coal gangue…
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 … Expand. 20. Save. Co-combustion and emission characteristics of coal gangue and low-quality coal.
Sustainable and clean utilization of coal gangue: …
Coal gangue, which is the main source of citrate-soluble silicon fertilizer, is a solid waste produced in the process of coal processing and utilization. Due to the accumulation of a large amount of coal gangue and the failure to fully utilize or dispose it, it caused problems on the environment
Exploring calcined coal gangue fines as the total substitute …
1. Introduction. Coal gangue, a waste produced during coal mining, has been regarded as the largest source of industrial waste in China. It is estimated that the production of 1 t coal generates 0.1–0.25 t coal gangue [1], and the total stockpile of coal gangue exceeds 6 billion tons in China [2], [3].The coal gangue not only occupies …
Identification and Activation of Coal Gangue and …
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 …
Air and oxy-fuel combustion characteristics of coal gangue …
1. Introduction. Coal gangue, characterized by high ash content and low heating value, is an undesired but inevitable by-product of coal mining [[1], [2], [3]].Based on the fuel flexibility advantage of circulating fluidized bed combustion (CFBC) technology and increasing demand for electricity, coal gangue is widely used in CFBC power plants for …
Recognition method of coal and gangue combined with …
Accurate identification of coal and gangue is an important prerequisite for intelligent separation, which can help the intelligent development of coal mines. Based on multispectral imaging, we propose a coal and gangue identification method combining structural similarity index measure (SSIM) and principal component analysis network …