1. Introduction. Coal gangue is an industrial solid waste produced by coal mining and processing 13.The average production of gangue accounts for 1015 of raw coal production 4,5, making coal gangue one of the biggest solid wastes in China.At present, utilization ratio of coal gangue can reach about 60 in some countries.
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2020-5-15Abstract Coal gangue CG is the predominant solid waste produced in the mining industry. Understanding the combustion thermokinetics is essential for the effective management of environmental hazards caused by the spontaneous combustion of CG.
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2019-6-25Recycling of Moroccan coal gangue in the elaboration of a Portland clinker D. Belkheiria,b, A. Diouria, M. Taibib, O. Sassi b, J. Arideb a Universit Mohammed V, Laboratoire de chimie du solide applique, Facult des sciences, Rabat, Maroc Morocco.
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2020-6-17Coal gangue refers to the solid waste generated during coal mining and beneficiation and accounts for 10-15 of coal production6. The cumulative stockpiles of coal gangue in Shanxi province in China amounted to 829 million tons at the end of 20097. This large amount of coal gangue not only occupied a large land area, but also brought significantly
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Coal gangue, one of the main hazardous emissions of purifying coal from coalmine industry, is rich in silica and alumina. However, the recycling of the waste is normally restricted by less efficient techniques and low attractive output the utilization of such waste is still staying lower than 15. In this work, the silica aerogel materials were synthesized by using a precursor extracted from ...
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2015-7-22Coal gangue is a problematic waste discharged from coal mining and beneficiation 13, which accounts for 10 to 15 wt of coal production 4. The decades of coal production have resulted in enormous amounts of coal gangue generated in every coal-producing country. The coal gangue is mostly stockpiled, causing severe
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2019-5-3136 Wenlong Wang, Zhongyang Luo, Zhenglun Shi, Chunyuan Ma, Thermodynamic analysis of ash mineral phases during combustion of high-sulfur coal with high calcium. Industrial Engineering Chemistry Research . 2011, 505 3064-3070.
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The coal gangue-based -SiAlON composite was applied in preparation of iron ladle brick with ambient compressive strength of 64.1 MPa and refractoriness under load higher than 1700 C. Compared with the conventional method, the preparation of SiAlON-based composite using coal gangue has a high potential of energy saving.
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This paper deals with the hydration of a blend of Portland cement and activated coal gangue in order to determine the relationship between the degree of hydration and compressive strength...
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2019-9-72019. Occurrence and Distribution of Gallium, Scandium, and Rare Earth Elements in Coal Gangue Collected from Junggar Basin, China. International Journal of Coal Preparation and Utilization Vol. 39, No. 7, pp. 389-402.
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RESULTS. The polysilicic metal coagulant was synthesized from coal gangue under different conditions. Fourier transform infrared spectroscopy, Xray diffraction and scanning electron microscopy confirmed that both amorphous and crystalline phases were present in the samples and new chemical bonds such as SiOAl and SiOFe were formed.
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2017-5-9Coal gangue is a by-product of the mining, washing, and selection of coal 1. Generally, coal gangue is a mixture of ... crystalline phases of the sintered products were mullite, corundum, and cristobalite. When sintered at 1500 1C, samples with 5 mol La 2O 3 addition already achieved
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eral phases, with little or no reactivity, and pre-treat - ment processes can promote more amorphous phase formation and less crystalline products 6, 9. These characteristics can enhance the potential for coal gangue to be used in the production of construction materials. Studies on coal
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RESULTS. The polysilicic metal coagulant was synthesized from coal gangue under different conditions. Fourier transform infrared spectroscopy, Xray diffraction and scanning electron microscopy confirmed that both amorphous and crystalline phases were present in the samples and new chemical bonds such as SiOAl and SiOFe were formed.
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The oxidation behavior of different SiAlON phases -SiAlON, X-phase SiAlON and 12H powders synthesized from coal gangue in air atmosphere was investigated using isothermal thermogravimetry TG and field-emission scanning electron microscopy FE-SEM. The effect of ferric oxide impurities in coal gangue was studied. The results show that ferric oxide contributes to the growth of SiAlON ...
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Coal gangue is a heterogeneous material and its physicochemical and mineralogical characteristics are dependent on the geology of the extraction field. It is comprised of a varied mixture of mineralogical components, such as quartz, kaolinite, illite, pyrite and others.
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Downloadable The construction of a power plant using a 660 MW e supercritical circulating fluidized bed CFB boiler with co-combustion of coal and gangue has been proposed in China. Therefore, this study simulated the distribution law and transformation mechanism of sulfur-containing phases using three low-calorific samples of gangue and coal mixtures under different conditions, based on the ...
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CiteSeerX - Document Details Isaac Councill, Lee Giles, Pradeep Teregowda We investigated the possibility of recycling and recovery of Moroccan coal gangue coal mine of Jerada. The analysis of the waste showed that it is formed essentially of silica and clays. We were interested to elaborate a Portland clinker from mixtures composed of limestone and coal gangue.
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The prepared coal gangue based blended cement, containing 52 of activated coal gangue C by CMHTA technology, has a better mechanical property than activated coal gangue T by TMTA technology and raw coal gangue. The results show that both of the TMTA and CMHTA technologies can improve the cementitious activity of raw gangue greatly.
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2020-3-21The annual consumption of the first-phase project is 1,909,000 tons of coal, including 477,000 tons of coal slime with low calorific value, 668,000 tons of gangue and 764,000 tons of final raw coal. The coal burning of the project is mainly supported by Binchang Mining Companys Wenjiapo coal mine, which has a designed production capacity of 4.0Mta and a service life of 75.7a.
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eral phases, with little or no reactivity, and pre-treat - ment processes can promote more amorphous phase formation and less crystalline products 6, 9. These characteristics can enhance the potential for coal gangue to be used in the production of construction materials. Studies on coal
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2019-9-72019. Occurrence and Distribution of Gallium, Scandium, and Rare Earth Elements in Coal Gangue Collected from Junggar Basin, China. International Journal of Coal Preparation and Utilization Vol. 39, No. 7, pp. 389-402.
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11.10 Coal Cleaning. 2015-9-10The scheme used in physical coal cleaning processes varies among coal cleaning plants but can generally be divided into four basic phases initial preparation, fine coal processing, coarse coal processing, and final preparation. A process flow diagram for a typical coal
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Modelling heterogeneous coal-rock HCR failure patterns under dynamic impact loads using image-based finite element FE and discrete element DE model HighlightsDynamic impact loading of HCR in three directions x-, y- and z-axis are modelled.The effects ...
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