Research on the Identification Mechanism of Coal Gangue …
For coal and gangue, intelligent sorting processes for separation, the use of coal and gangue mineral components with different fundamental differences, and the study of …
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Enhancing the carbon content of coal gangue for …
However, it is crucial to note that heavy metals and naturally occurring polycyclic aromatic hydrocarbons (PAHs) present in coal gangue are considered significant pollutants among its various components (Ahrens and Morrisey, 2005). Coal gangue ash contains small amounts of harmful trace elements, such as As and Cr.
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Characteristics of Coal Gangue and Present Situation and …
As an associated mineral of coal, coal gangue is a mixture of carbonaceous shale, argillaceous shale and sandy shale, the main components of coal gangue are SiO 2 and Al 2 O 3 (Ying and …
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Full-components utilization: Study on simultaneous …
Rare earth elements (REE) are integral to the production of high-tech materials such as permanent magnets, electronic components, catalysts, phosphors and hydrogen storage alloys [4], [5], [6], [7].Recently, with the shortage of traditional rare earth deposits and escalating demand for rare earths, the exploitation of coal gangue as an alternative resource to …
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Coal gangue-supported catalyst for the efficient conversion …
The main components of coal gangue are SiO 2, Al 2 O 3, Fe 2 O 3, MgO and a few metal oxides. Its ash melting point is very high, ranging from 1050 °C to 1800 °C (Haibin et al., 2010). Therefore, the conversion of this solid waste into new materials to provide added value is highly advantageous. There are many advantages to using coal gangue ...
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Progress in the utilization of coal gangue for soilification …
2.1 Main Components of Coal Gangue. Coal gangue is rich in major components . such as aluminum oxide (Al. 2 O 3), silicon dioxide (SiO 2), and iron oxide (Fe 2 O 3) [10], as shown in Table 1. Its chemical composition is diverse, primarily consisting of silicates, aluminates, and ferrites, along with a certain amount of organic matter, water,
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What is Gangue in chemistry?
Gangue is the impurity that surrounds or is closely mixed with the ore deposit in which the minerals are present. Gangue is composed of waste rocks, stone and extra unwanted …
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Representative coal gangue in China: Physical and chemical …
Therefore, the essential components of CG samples are SiO 2, Al 2 O 3, Fe 2 O 3, CaO and other chemical components. A amount of anorthite is also one of the reasons why …
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Effect of Gangue Distribution on Compressive Strength …
The gangue content increased as the grade of the iron ore decreased. In granules composed of intermediate and fine ores, the influence of the gangue component on the com-pressive strength is expected to be large. Therefore, in this study, commercial iron ore and gangue-free ore were used for granulation, and the effect of the gangue components on
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Impacts of Thermal Activation on Physical Properties of Coal Gangue …
The primary component of coal gangue is the clay mineral kaolinite, which begins to decompose at approximately 550 °C, undergoing a phase transformation into metakaolinite. During this process, the sodium, potassium, and magnesium elements are volatilized. The filtration of Na, K, and Mg is observed to decline when the heat treatment ...
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In this paper, the main components of the coal gangue in Ordos City were carried out by X-ray flu-orescence spectrometry (XRF) and X-ray diffraction (XRD), the element analysis, composition
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Effects of modified coal gangue addition on CO2 release …
The coal gangue utilized in this study was obtained from the Qingdong coal mine located in Suixi County, Huaibei City, Anhui Province. Its primary constituents are SiO 2 and Al 2 O 3, predominantly comprising minerals such as quartz and kaolinite. The coal gangue contains 11.69 % organic matter with a δ 13 C value of −19.43
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Experimental study on municipal solid waste incineration fly …
In this study, municipal solid waste incineration fly ash (MSWI FA) was used as a component to supplement the missing element of Ca in the coal gangue (CG) to synthesize CG-MSWI FA geopolymer (CG-MFG). ... Coal gangue belongs to industrial solid waste, which contains organic matters and inorganic silicate minerals [5]. However, direct discharge ...
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The effect of biomass addition on pyrolysis characteristics and …
The pyrolysis experiment of biomass added to coal gangue was studied by thermogravimetric-Fourier transform infrared spectroscopy-mass spectrometry (TG-FTIR-MS) method. The multi-component reaction model was used to simulate the pyrolysis reaction of coal gangue and biomass. The most suitable model was obtained, and the pyrolysis mechanism …
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Main components of the coal gangue.
Download scientific diagram | Main components of the coal gangue. from publication: Extraction of Aluminum and Iron Ions from Coal Gangue by Acid Leaching and Kinetic Analyses | Extracting ...
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Influence of biomass on multi-component reaction model …
The effects of biomass on coal gangue combustion characteristics, combustion products and combustion reaction model are studied in this paper.
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Experimental study on municipal solid waste incineration
This study explores the potential of municipal solid waste incineration bottom ash (MSWI BA) and coal gangue as precursors for alkali-activated cementitious materials (CG-MBA). ... Experimental study on municipal solid waste incineration bottom ash as a component of alkali-activated coal gangue-based geopolymer Environ Sci Pollut Res Int. 2024 ...
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The effect of biomass addition on pyrolysis characteristics and …
The pyrolysis experiment of biomass added to coal gangue was studied by thermogravimetric-Fourier transform infrared spectroscopy-mass spectrometry (TG-FTIR-MS) method.
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Research on the impact and control techniques of gangue …
Thus, a model for calculating the gangue impact energy including four modes of motion is developed, and the effect of different factors on the gangue impact strength is investigated. The maximum gangue impact velocity and impact energy are obtained. Different support components and parameters are designed and optimized by numerical simulation.
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Extraction of valuable components from coal gangue …
Coal gangue mainly contains SiO 2 and Al 2 O 3 ; they account for approximately 50-80% of the coal gangue component [43], making it an appropriate raw material for the synthesis of ZSM-5 molecular ...
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Extraction of valuable components from coal gangue …
Coal gangue has the dual attributes of hazard and resource. With the increasing awareness of resources conservation and ecological sustainability, the high-value utilization of coal gangue has attracted active attention. In this research, thermal activation followed by HNO 3 leaching were performed to extract valuable components from coal ...
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What is Gangue in Chemistry Definition
Gangue is generally an unwanted material or impurity that is present in an ore. This can be found in ore deposits where the mineral is present. During the process of extraction, these impurities are mixed up with ore in the form of stone, sand, rock, etc. The gangue must be separated from the mineral with the help of ore dressing or mineral ...
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Influence of lignin on coal gangue pyrolysis and gas …
The influence mechanism of lignin on coal gangue pyrolysis has not been studied in the literature, so this article is helpful to clarify the influence mechanism of biomass components on coal gangue. The research of coal gangue pyrolysis technology has a positive effect on reducing the amount of solid waste and reducing the harm to the environment.
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Gangue | geology | Britannica
…of valueless minerals, collectively called gangue. The more concentrated an ore mineral, the more valuable the mineral deposit. For every mineral deposit there is a set of conditions, such as the level of concentration and the size of the …
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Environmental hazards and comprehensive utilization of …
Coal gangue pollution components can be released into the soil surface water not only by direct weathering of the coal gangue, but also through the process of "coal-water" interaction, where pollutants are released into the external environment as leachate [29]. Consequently, these pollutants can reach the surrounding land and groundwater.
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Experimental investigation on the mixture optimization and …
The main crystal component of coal gangue is SiO 2. (2) Fly ash: The microstructure is mainly composed of intact spherical particles with small pores on the surface. The main crystal component is SiO 2, with a small amount of 3Al 2 O 3-2SiO 2 and CaCO 3. (3)
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Comprehensive utilization and environmental risks of coal gangue: A
The main mineral component of coal gangue is clay minerals which are ingredients to meet brick production requirements. The energy in coal gangue functions in the process of brick making to realize the save of raw coals. In addition to the need of coal gangue to be crushed, the other production process is basically the same as that of clay ...
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A short review of the sustainable utilization of coal gangue in
Coal gangue is a black-gray sedimentary rock associated with coal seams, composed of a variety of rock and mineral compositions. It is characterized by low carbon …
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Coal Gangue: Composition, Processing, Use And …
Coal gangue is a fixed coal mining, washing, and processing product. It is a black-gray rock with lower carbon content and harder than coal associated with coal seams during the coal formation process. And its …
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The effect of biomass addition on pyrolysis characteristics and …
Coal gangue has the characteristics of high ignition temperature, high ash content and low volatile matter. ... Component 5 mainly occurs in the range of 225–610 °C, which is due to the decomposition of lignin. Table 2. Participation degree and R 2 of each component in the multi-component model of PS pyrolysis reaction. Degree of participation
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