Coal Gangue Policy

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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 gangue without appropriate utilization has resulted in a squander of resources, waste …

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The Sustainable Utilization of Coal Gangue in Geotechnical …

Abstract 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 thorough understanding of environmental concerns associated with the current model of ...

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Study on mechanism and kinetics of iron removal by …

Utilizing the abundant kaolin resources within coal gangue is economically beneficial, although the iron-containing phase in the minerals hampers the value of its utilization. In the present study, CaCl2 served as the chlorination agent for iron removal from coal gangue through chlorination roasting. The study revealed that when the roasting temperature is …

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Coal gangue separation system based on density …

Coal gangue separation is an essential part of the development and utilization of coal. A method of separating gangue from coal based on the density by calculating volume and weight of the ores which is measured by the designed equipment was given in this paper. The working principle of the separation method was described …

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YOLOv7-based Object detection method for coal gangue

This paper presents a model and instructions for a coal gangue detection method. The separation of coal and gangue is of great significance for environmental protection and efficient resource utilization. As science and technology continue to develop, coal sorting requires intelligent, information-based, and specialized approaches to accelerate the …

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Preparation of technosol based on coal gangue and its …

Coal gangue contains many heavy metals (Xu et al., 2016; Yang et al., 2008) and organic pollutants ... 2023), and especially under the guidance of China's fertilizer reduction policy, it will play a more important role in agricultural management. The current study found that organic fertilizer significantly improved coal gangue technosol ...

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Representative coal gangue in China: Physical and chemical …

This paper studies the representative coal gangue (CG) samples in China, analyzes their chemical composition, heavy metal coupling mechanism and risk …

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Environmental-friendly coal gangue-biochar composites …

Coal gangue, as a solid waste generated during coal mining and washing, not only encroaches on a large number of land resources but also poses certain risks to the environment. It is reported that the cumulative amount of coal gangue piled up in China has reached 6 billion tons, and the annual discharge amount is about 500–800 million tons.

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Co-utilization of spent pot-lining and coal gangue by …

DOI: 10.1016/J.JCLEPRO.2018.08.331 Corpus ID: 158715169; Co-utilization of spent pot-lining and coal gangue by hydrothermal acid-leaching method to prepare silicon carbide powder

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Synergistic performance of microwave-activated coal gangue …

In China, coal gangue, a by-product of coal mining, offers a promising alternative as it can be activated and used in LC 3 production30, 31. Coal gangue, which is abundant and often considered a waste material, poses significant environmental challenges due to its disposal issues.

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Effects of interface angles on properties of rock-cemented coal gangue …

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 …

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A review of the synthesis and application of zeolites from coal …

Zeolite derived from coal-based solid wastes (coal gangue and coal fly ash) can overcome the environmental problems caused by coal-based solid wastes and achieve valuable utilization. In this paper, the physicochemical properties of coal gangue and coal fly ash are introduced. The mechanism and application characteristics of the …

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Fabrication and application of porous materials …

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 –

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Environmental hazards and comprehensive utilization of solid waste coal

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 …

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Review of Coal Gangue Characteristics and Ecological …

In this paper, the physical, chemical and pollution characteristics of coal gangue are summarized, and the ecological restoration mode is divided into two modes: …

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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 …

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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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Low-carbon utilization of coal gangue under the carbon …

This article summarizes the research progress of coal gangue treatment and utilization under the carbon neutralization strategy. It focuses on the carbon …

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Identification of Coal, Gangue, and Surrounding Rock Based …

As one of the most important energy sources in the world, efficient mining and application of coal is the basis for fully utilizing its effectiveness. During the mining stage, accurately identifying coal and surrounding rock is essential to prevent both oversegmentation and undersegmentation. During the beneficiation stage, separating gangue from coal is …

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Environmental hazards and comprehensive utilization of solid waste coal

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 …

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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 Comprehensive Utilization …

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 …

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Investigating comparisons on the coal and gangue in …

DOI: 10.1016/j.mineng.2023.108450 Corpus ID: 264318580; Investigating comparisons on the coal and gangue in various scenarios using multidimensional image features @article{Lv2023InvestigatingCO, title={Investigating comparisons on the coal and gangue in various scenarios using multidimensional image features}, author={Ziqi Lv and Yao …

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Industrial development and prospect about

Coal gangue as one of the largest industrial solid wastes in China brings about very serious environmental, social and economic problems. 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 …

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Study on Preparation of Calcium-Based Modified Coal Gangue …

Efficient and thorough treatment of dye wastewater is essential to achieve ecological harmony. In this study, a new type of calcium-based modified coal gangue (Ca-CG) was prepared by using solid waste coal gangue as raw material and a CaCl2 modifier, which was used for the removal of malachite green, methylene blue, crystal violet, …

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Axial compression behavior of coal gangue coarse …

DOI: 10.1016/j.jcsr.2024.108534 Corpus ID: 267619026; Axial compression behavior of coal gangue coarse aggregate concrete-filled steel tube stub columns @article{Wang2024AxialCB, title={Axial compression behavior of coal gangue coarse aggregate concrete-filled steel tube stub columns}, author={Jinli Wang and Yongxu …

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Study on the Occurrence of Gallium in Gallium-Enriched Coal Gangue …

The coal gangue used in this study was obtained from Shuozhou, Shanxi province, China. The chemical composition of the raw coal gangue as well as the residue ash were quantified by an inductively coupled plasma optical emission spectrometer (ICP-OES, Pekin-Elmer, Optima 5300DV) and X-ray fluorescence spectrometry (XRF, …

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Renewable conversion of coal gangue to 13-X molecular …

Using coal gangue (CG) as raw material, a new type of all solid-waste-based 13-X molecular sieve material was controllably prepared by alkali fusion-hydrothermal method. The synthetic molecular sieve was used as a solid adsorbent to treat Cd2+-containing wastewater, and its adsorption behavior on Cd2+ in aqueous solution …

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Characteristics of Coal Gangue and Present Situation and …

Coal gangue is a kind of solid waste produced in the process of coal production and processing, which accounts for about 10–20% of coal output on average …

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The use of modified coal gangue for the remediation and …

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 …

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Effects of Coal Gangue on Cement Grouting Material …

The coal gangue is one of the most abundant industrial solid wastes and pollute source of air and water. The use of coal gangue in the production of cement grouting material comforms to the basic state policy of environment protection and the circular using of natural resources.

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Diffusion law of coal gangue slurry and the application of …

Quantitative analysis of the whole rock minerals of coal gangue was conducted using a Nippon Nikkei ultima 4 X-ray diffractometer, and the test results are shown in Fig. 3.According to the ...

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Carbon Footprint Analysis of Coal Gangue in Geotechnical

Coal gangue is a mine waste generated during the mineral processing phase of coal production. With the surge in demand for coal in thermal power, steel and cement generation industries, the rate of coal gangue generation has reached unprecedented heights. With the realisation of potential threat posed by coal gangue, …

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A Novel Coal-Gangue Recognition Method for Top Coal …

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, …

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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. To bridge this gap, we herein conducted the pilot-scale suspension calcination of low-quality coal gangue; explored …

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Environmental effects of coal gangue and its utilization

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.

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