Coal Gangue Technology

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Spectral band selection and ANIMR-GAN for high …

Low-energy and efficient coal gangue sorting is crucial for environmental protection. Multispectral imaging (MSI) has emerged as a promising technology in this domain. This work addresses the ...

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Comprehensive utilization and environmental risks 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 …

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Technology and engineering test of filling goaf with coal 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 technologies such as underground filling technology of coal gangue, mine yellow mud grouting technology, and the evolution law of mining …

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Characterization studies on coal gangue for sustainable …

Among the fossil fuels, coal is a primary contributor to global GHG with substantial emissions generated during its mining and combustion process. Coal …

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Study on the leaching behavior differences of rare earth …

Coal gangue was collected from Haerwusu open-pit mine, Jungar coalfield, Inner Mongolia, China. The samples were crushed and ground to less than 0.075 mm and dried in a 105 ℃ oven for 8 h for subsequent leaching tests. ... Standard solutions of REY (NCS141015) and Al (NCS141018) were purchased from NCS Testing Technology Co., Ltd. 2.2 ...

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Synergistic performance of microwave-activated coal gangue …

Coal gangue: The coal gangue (CG) used in this study is untreated raw coal gangue, sourced from Lingshou County, Hebei Province, China. Its appearance mostly presents as flakes or blocks of black-gray rocks, and the shape and size of CG vary. The main chemical components of the CG are shown in Table 1, measured by X-ray …

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Novel desulfurization technology by employing coal gangue …

The elimination of SO 2 pollutants from coal fired flue gas through using industrial solid waste as absorbent has received widespread attention. Herein, a novel process on SO 2 purification by employing coal gangue slurry is proposed for the first time. The effects of different operating variables on SO 2 absorption efficiency were studied, …

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Technology and engineering test of filling goaf with coal gangue …

Abstract. Read online. Abstract 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 technologies such as underground filling technology of coal gangue, mine yellow mud grouting technology, and the …

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Research on the Strong Generalization of Coal Gangue …

technology to establish a coal gangue recognition model, coal gangue sorting can be achieved based on the differencein infrared images between coal and gangue.17,18 However, this method needs high-temperature control requirements and is greatly affectedby temperature. Machine learning algorithms

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Trace Elements in Coal Gangue: A Review | IntechOpen

Coal gangue is one of the largest industrial residues. It has high ash content, low carbonaceous content, and heating value. Meanwhile, it has some trace elements. Large quantities of coal gangue cause serious environmental problems by polluting the air, water, and soil as well as occupying a tremendous amount of land. …

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Research progress on gravity heat pipe technology to …

During coal storage and transportation, spontaneous combustion occurs occasionally. Heat pipes, as new fire prevention technology, have been applied and explored in the prevention and control of spontaneous combustion in coal yards. This paper combines the mechanism of spontaneous combustion in coal yards and the advantages …

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Investigation on activation technology of self-heating

Coal gangue is a solid waste discharged in coal mining and dressing process. Large-scale decarbonization and activation treatment are key steps toward massive and efficient utilization of coal gangue. In this paper, a new process for the preparation of a cement admixture from coal gangue by effectively utilizing its calorific …

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Powder Technology

1. Introduction. Conventional coal mining industries are associated with significant environmental issues including ground collapse and subsidence, water pollution and loss, and mining waste disposal [[1], [2], [3]].For example, the coal mining, processing and burning generate 795 million tons of coal gangue and 650 million tons of fly ash in …

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Detection of Spontaneous Combustion Areas of Coal Gangue …

In the selection of fire prevention and extinguishing technologies for coal gangue hill fire areas, traditional methods have several limitations. The excavation and cooling method is not suitable due to the uncertainty of the fire area's depth and scope. Additionally, this method requires significant time and effort but produces minimal ...

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Microscopic Pore and Filling Performance of Coal Gangue

The hydration products of coal gangue cementitious material were a large number of C-S-H gel with fibrous shape and ettringite (AFt) with compact block structure. The theoretical reference was provided for the preparation of low cost gangue cemented filling materials in coal mines. ... Materials Science & Technology, 2016, 24(3): 80–84 ...

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Technology and engineering test of filling goaf with …

the existing lling technology of coal gangue underground, the grouting technology of mine yellow mud and the evolution law of mining-induced overburden cracks 19–27 . e principle and process ow ...

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A Study of Multispectral Technology and Two-Dimension Autoencoder …

Coal is one of the main sources of human energy. In the process of coal mining, separating gangue from coal has great significance for environmental protection and energy conservation. The core problem in the separation of gangue is the recognition of coal and gangue. In this study, multispectral technology was used to identify gangue. First, set …

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Research and prospect of underground intelligent coal …

Using underground intelligent coal gangue sorting technology can increase efficiency, protect the environment, and enhance safety, which is essential for achieving efficient …

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Environment influences and extinguish technology of …

Results showed that after calcining with mineral powders, the crushing rate of coal gangue decreased from 16.8 % to 16.1–13.2 %, and water absorption decreased from 5.29 % to 2.74–3.90 % ...

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Technology and engineering test of filling goaf with coal gangue …

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 ...

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Research on the Strong Generalization of Coal Gangue …

In recent years, intelligent coal gangue recognition technology has made some progress. The recognition technology based on X-ray and γ-rays is relatively mature. Through the imaging of coal and gangue, rapid recognition of coal and gangue can be realized. However, its radiation is difficult to control, so it is difficult to promote. ...

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Environment influences and extinguish technology of …

Technology 2 is that surface loess cover is used to reduce the airflow of spontaneous combustion area of coal gangue. Technology 3 is that grouting slurry technology can reduce heat quantity of spontaneous combustion area by the way of drilling and fracture. These technologies can effectively control spontaneous combustion area …

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Processes | Free Full-Text | Activation of Low-Quality Coal Gangue

Although the calcination-based activation of coal gangue is important for its valorization in the form of cementitious materials, the related works mainly focus on high-quality coal gangue, neglecting its low-quality counterpart. ... This research was funded by the "Anhui Provincial Science and Technology Major Project, grant number ...

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Synergistic performance of microwave-activated coal gangue …

Addressing these research gaps is crucial for advancing the use of coal gangue in LC 3 production and promoting the sustainable development of low-carbon cement technologies. By leveraging coal gangue, China can not only mitigate the raw material constraints for LC 3 cement but also pave the way for innovative solutions in the …

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Fabrication of pollution-free coal gangue-based catalytic …

Novel coal gangue-based persulfate catalyst (CG-FeCl2) was successfully synthesized by the means of calcinating under nitrogen atmosphere with the addition of ferrous chloride tetrahydrate (FeCl2·4H2O). The phase transformation of the prepared materials and gas products during the heating process are thoroughly investigated. It is …

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Performance of cemented coal gangue backfill

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 …

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Sensors | Free Full-Text | Research on Recognition of Coal and Gangue …

Coal gangue image recognition is a critical technology for achieving automatic separation in coal processing, characterized by its rapid, environmentally friendly, and energy-saving nature. However, the response characteristics of coal and gangue vary greatly under different illuminance conditions, which poses challenges to the stability of …

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Microstructure Characteristics and Possible Phase Evolution of the Coal

Industrial wastes such as steel slag and coal gangue etc. were chosen as raw materials for preparing ceramic via the conventional solid-state reaction method. With steel slag and coal gangue mixed in various mass ratios, from steel slag to coal gangue at 10% intervals, microstructure and possible phase evolution of the coal …

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Multi-Scale Analysis of the Damage Evolution of Coal Gangue …

This study utilized X-ray computed tomography (CT) technology to analyze the meso-structure of concrete at different replacement rates, using a coal gangue coarse aggregate, after experiencing various freeze–thaw cycles (F-Ts). A predictive model for the degradation of the elastic modulus of Coal Gangue coarse aggregate Concrete (CGC), …

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Precise detection of coal and gangue based on natural γ-ray

To address the technical limitations of automatic coal and gangue detection technology in fully mechanized top coal caving mining operations, the low radiation level radioactivity measurement ...

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A review of intelligent coal gangue separation technology …

Intelligent coal gangue separation equipment has the advantages of fast speed, high precision, strong modularity, and integration scalability. It also has the …

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The Sustainable Utilization of Coal Gangue in Geotechnical …

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 …

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Transformation of Coal Gangue to Sodalite and Faujasite

The coal gangue as the only source of silicon and aluminum was employed to synthesize sodalite and faujasite using hydrothermal method, which directly treated the mixture of pre-treated coal gangue and NaOH solution under hydrothermal environment. X-ray powder diffraction analysis (XRD), thermogravimetry analysis (TG) and differential …

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Research on Recognition of Coal and Gangue Based on Laser …

Coal gangue image recognition is a critical technology for achieving automatic separation in coal processing, characterized by its rapid, environmentally …

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Exploring the influence of native minerals in coal gangue on …

Corresponding Author. Nong Zhang [email protected] School of Physics and New Energy, Xuzhou University of Technology, Xuzhou, Jiangsu, China. National Key Laboratory of Fine Coal Exploration and Intelligent Development, China University of Mining and Technology, Xuzhou, Jiangsu, China

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Separating coal and gangue using three-dimensional laser scanning

1. Introduction. Gangue minerals accounts for between 15% and 20% of raw coal in China (Qian et al., 2007).Indeed, as coal production has increased, so has gangue generation; by the end of 2009, the total amount of gangue produced added up to 5.0 × 10 9 t, encompassing 40% of the total Chinese solid waste (Miao and Qian, …

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