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网页2021年5月1日 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 网页2016年11月1日 IR spectra of ground coal gangue that had not undergone calcination (Fig. 8(a)) revealed that grinding had significant effects on the changes in the micro structure 网页2022年12月1日 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 网页2021年9月1日 Coal gangue is the solid waste produced during coal mining and accounting for about 10–20% of total coal output. It is estimated that about 0.8–1.6 billion tons of 网页2016年11月1日 Coal gangue, a type of kaolinite clay in coal measures, is one of the largest categories of solid industrial wastes in China. Alumina extraction from coal gangue could offer an alternative to bauxite as a source of alumina. Mechanically modification by grinding is an effective activation method to improve alumina recovery from coal gangue. 网页2017年10月30日 @article{Geng2017ComparisonOR, title={Comparison of red mud and coal gangue blended geopolymers synthesized through thermal activation and 网页2019年12月1日 Coal gangue contains high organic matter, which is an ideal substrate for carrying nitrogen, Through grinding of coal gangue, the reactivity of kaolinite is improved by removal of hydroxyls (Frost et al., 2002, Gamelas 网页clean coal product with a yield of 25% and an ash content of 13.96%. It is worth noting that the above re-separation processes of coal flotationtailing all include a grinding stage. The carbon component in the coal flotationtailings is closely connected with the gangue and needs to be ground to achieve further dissociation. Kaolinite (Al 2 O 3 网页2021年5月5日 The coal gangue contains fine particles with a particle size less than 4.75mm, coarse particles larger 网页2021年5月1日 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 网页2020年5月15日 Coal gangue-based geopolymer (CGGP) is one of the hot spots existing in the recycling of coal gangue resources due to its good comprehensive mechanical properties. However, the coal gangue structure is stable and reactivity is poor, so the coal gangue needs to be activated before utilization. In this , the microstructure changes 网页2017年10月30日 @article{Geng2017ComparisonOR, title={Comparison of red mud and coal gangue blended geopolymers synthesized through thermal activation and mechanical grinding preactivation}, author={Junjun Geng and Min Zhou and Yixin Li and Yuchi Chen and Yi Han and Sha Wan and Xian Zhou and Haobo Hou}, journal={Construction and 网页2021年5月5日 The coal gangue contains fine particles with a particle size less than 4.75mm, coarse particles larger than 4.75mm. k w is the coal gangue fine-rough grain ratio. 网页2021年8月19日 Coal gangue, an industrial waste, is rich in silicon and aluminum phase and may be used as a mineral admixture in concrete after moderately stimulating activity, allowing for efficient solid waste utilization. This study used a mortar strength and activity evaluation method to investigate single or compound activation methods to find the 网页2022年6月26日 Affiliations. 1 School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China. 2 State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China. PMID: 35806620. PMCID: PMC9267344. DOI: 10.3390/ma15134495. 网页2023年2月28日 In this , the influence of calcium on coal gangue and fly ash geopolymer is explored, and the problem of low utilization of unburned coal gangue is analyzed and solved. The experiment took uncalcined coal gangue and fly ash as raw materials, and a regression model was developed with the response surface 网页The invention relates to a composite activated carbon-zeolite material and a preparation method thereof, particularly relates to a composite activated carbon-zeolite material prepared from coal gangue, and a preparation method of the material, and belongs to the field of a functional material. The method for preparing the composite activated carbon 网页However, high contents of silica and aluminum make it a potential zeolite precursor. This work deals with the synthesis and characterization of zeolite A from coal gangue under hydrothermal conditions for adsorption F in aqueous solution. By added Si-sources, the critical molar ratio of both n (Na 2 O): n (SiO 2) and n (SiO 2 ): n (Al 2 O 3 网页Relating to environmental protection and energy saving technologies and recycling of low-carbon content materials like coal gangue, coal cinder, peat, inferior coal, lignite, weathered coal and carbonaceous shale, the invention provides a low-carbon material high-efficiency renewable fuel. According to the invention, the low-carbon material is blended with 5 网页2022年9月15日 Coal gangue is one of the industrial solid wastes that may harm the human body through the ecosystem for a long time. Using coal gangue in 网页2022年5月12日 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 was 网页2021年11月28日 pollution, and so on [6–9]. Coal gangue belongs to the coal-measure kaolinite, and its main chemical composition is SiO2 and Al2O3 [10]. After bleaching, high-temperature calcination, and grinding, coal gangue will be transformed into high-purity kaolin, and it can be transformed into metakaolin when the calcination temperature is 网页2016年11月1日 DOI: 10.1016/J.POWTEC.2016.08.034 Corpus ID: 99113101; Improved extraction of alumina from coal gangue by surface mechanically grinding modification @article{Guo2016ImprovedEO, title={Improved extraction of alumina from coal gangue by surface mechanically grinding modification}, author={Yanxia Guo and Kezhou Yan and Li 网页2023年2月28日 In this , the influence of calcium on coal gangue and fly ash geopolymer is explored, and the problem of low utilization of unburned coal gangue is analyzed and solved. The experiment took uncalcined coal gangue and fly ash as raw materials, and a regression model was developed with the response surface 网页To achieve the intelligent recognition of coal gangue in fully mechanized caving face, a coal caving acoustic signal collection device is designed, which can sense the movement of the tail beam and automatically trigger data collection.Field data is collected at the fully mechanized caving face 3106 of Gucheng Coal Mine, Shandong Energy, and it is 网页The property of raw kaolinite-coal-gangue is very stable, and reactivity of kaolinite-coal-gangue is enhanced by mechanical force. The SEM, XRD and IR were used to analyze mechanochemical changes during kaolinite-type-coal gangue grinding. The results showed that mechanical force plays a dominant role in the enhanced reactivity, by inducing 网页The invention relates to a composite activated carbon-zeolite material and a preparation method thereof, particularly relates to a composite activated carbon-zeolite material prepared from coal gangue, and a preparation method of the material, and belongs to the field of a functional material. The method for preparing the composite activated carbon 网页2021年11月11日 The usage of coal gangue in structural concrete members is still limited. The mechanical behavior of some structural members using coal gangue concrete has been reported. Among them, concrete filled steel tubes are a preferable configuration for using coal gangue concrete, regarding both the mechanical and durability performance. 网页2022年8月18日 Kaolinite in coal gangue transforms into metakaolin which is an irregular and amorphous phase as calcined at 600 degrees C-800 degrees C because of the dehydroxylation of Al-(O,OH) octahedrons together with the depolymerization of 
Review of Coal Gangue Characteristics and Ecological
Improved extraction of alumina from coal gangue by
Exploring calcined coal gangue fines as the total substitute
Mineral phase transformation in coal gangue by high
Improved extraction of alumina from coal gangue by
Comparison of red mud and coal gangue blended
Comprehensive utilization and environmental risks of coal
Associations of Gangue Minerals in Coal Flotation Tailing
Field study on the improvement of
Review of Coal Gangue Characteristics and Ecological
Experimental Study on the Characteristics of Activated
Comparison of red mud and coal gangue blended
Field study on the improvement of
Mechanism on Activation of Coal Gangue Admixture
Using Chinese Coal Gangue as an Ecological Aggregate
Polymers Free Full-Text Investigation on the Effect of
Method for preparing composite activated carbon-zeolite
Synthesis and Characterization of Zeolite A Obtained from
Low-carbon material high-efficiency renewable fuel (2014)
Polymers Free Full-Text Activation
Sustainable and clean utilization of coal gangue: activation
Research on Compressive and Flexural Properties of Coal
Improved extraction of alumina from coal gangue by
Polymers Free Full-Text Investigation on the Effect of
Feature extraction and classification method of coal
Study of Mechanical Force on Coal Gangue Reactivity
Method for preparing composite activated carbon-zeolite
Application of Coal Gangue as a Coarse Aggregate in
Effect of calcination condition on the microstructure and