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Activity and structure of calcined coal gangue
Journal of Wuhan University of Technology-Mater. Sci. Ed., 2007Coal gangue was activated by means of calcination in seven temperature ranges. Systematic research was made about activation mechanism and structural evolution. Glycerin-ethanol method, SEM, MIP and XRD were used to determine the variation of structure and activation of coal gangue during the calcination.
Gong, Chenchen +3 more
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Preparation of Coal Gangue Cement Mortar
Advanced Materials Research, 2013Many researches on coal gangue are aimed at increasing its activity by many methods together such as thermal, mechanical and chemical. The methods are so complex that they are difficult to be adopted by some companies. In this paper, considering the low-strength requirement of cement mortar, the activity of coal gangue is more evidently shown by Ca(OH ...
Wen Xia Li +3 more
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Environmental Geochemistry and Health
With the continual advancement of coal resource development, the comprehensive utilization of coal gangue as a by-product encounters certain constraints. A substantial amount of untreated coal gangue is openly stored, particularly acidic gangue exposed to rainfall.
Yanwen, Guo +3 more
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With the continual advancement of coal resource development, the comprehensive utilization of coal gangue as a by-product encounters certain constraints. A substantial amount of untreated coal gangue is openly stored, particularly acidic gangue exposed to rainfall.
Yanwen, Guo +3 more
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Direct-impact of sieving coal and gangue
Mining Science and Technology (China), 2010Abstract Gangue from underground separation of coal can directly be used for filling mined out areas, saving transport capacity and reducing the amount of waste polluting the environment above the ground. We introduced a structure and operating principle of an underground direct-impact sieving device by which a separation experiment was carried out ...
Jianping LI, Changlong DU, Jianwei BAO
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The concentration of fluorine in coals and gangue of China
Journal of Coal Science and Engineering (China), 2008A detailed comparison was done between the data about the F in coals published at home and abroad, and associated with the special situation in China. An introduction also was made to illuminate the forming, occurrence and accumulation of the F in coals and its potential hazard to human and environment.
Wei-hua Ao +3 more
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Performance of cemented coal gangue backfill
Journal of Central South University of Technology, 2007Possibility 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 backfill, but ...
Qin-li Zhang, Xin-min Wang
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Utilization of coal gangue for the production of brick
Journal of Material Cycles and Waste Management, 2016Coal gangue, an industrial solid waste discarded from coal mining and processing, was used as the sole raw material to prepare brick. The coal gangue was crushed, homogenized, milled and then pressed into green compacts. The dried compacts were sintered at different temperatures for 2 h.
Hongliang Xu +7 more
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Thermal decomposition of selected coal gangue
Journal of Thermal Analysis and Calorimetry, 2017The thermal behavior of two mineral-type coal gangues under different temperature conditions was investigated by heating treatment of kaolinite-type coal gangue and illite-type coal gangue based on thermal analysis, X-ray diffraction (XRD), infrared spectroscopy (IR) and scanning electron microscopy (SEM).
Xu, Bohui +4 more
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Engineering properties of cement with coal gangue
2011 International Conference on Electric Technology and Civil Engineering (ICETCE), 2011Engineering properties of cement with coal gangue was studied to determine the compressive strength, freeze-thaw and shrinkage characteristics of the material. The composition of coal gangue was determined using the screening test; the liquid limit, plastic limit and water ratio of the cement with coal gangue were measured using the Liquid and Plastic ...
Yan Zhang, Jun Zhang
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