Results 11 to 20 of about 469,716 (286)
Explosion Characteristics and variation of oxidized coal dust
Meikuang Anquan, 2023 Oxidized coal is a coal body that has undergone the process of warming up and cooling down, and has been widely used in mine fire area start-up, stratified mining, and re-mining of residual coal, etc.
HE Jie, CHENG Kai, ZHANG Jin
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Experimental study for the effect of pre-oxidization on functional groups of coal surface
Meikuang Anquan, 2021 In order to investigate the evolution law of the functional groups of pre-oxidized coal samples, lignite from Liujia and Sitai, bituminous coal from Tongxin and anthracite from Baijigou were pre-oxidized at 50 ℃, 120 ℃ and 200 ℃ for 6 h.
SUN Yong
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Thermal effect and kinetic analysis of secondary spontaneous combustion of pre-oxidized coal
Meikuang Anquan, 2022 In order to study the secondary spontaneous combustion of coal treated with different pre-oxidation temperatures, pre-oxidized coals with different temperatures were prepared by temperature programmed device.
ZHANG Wenhao, YU Tao
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Meikuang Anquan, 2023 In order to investigate the spontaneous combustion characteristics of secondary oxidation of residual coal in the mining area, the changes of microscopic and macroscopic parameters during the secondary oxidation of raw and oxidized coals were compared ...
LIANG Wenxu +4 more
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Electrokinetics of oxidized coal
Fuel Processing Technology, 1990 Abstract Electrokinetic measurements were carried out in order to determine the properties of oxidized coal surfaces over a wide pH range both in the presence and absence of various metal ions and flotation collectors. It was found that polyvalent cations, such as Fe ++ , Fe +++ and Al +++ decreased the zeta potential to zero and then reversed the ...
M. Sarikaya, G. Özbayoǧlu
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Influence mechanism of pre-oxidation on the secondary oxidation characteristics of coal: insights from TG-DSC-FTIR analysis [PDF]
Scientific ReportsThe secondary oxidation behavior of coal represents a critical process governing its spontaneous combustion propensity and pollutant emissions. To elucidate the influence mechanism of pre-oxidation on the secondary oxidation characteristics of coal, this
Shaoqiang Yun +4 more
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Study on spontaneous combustion characteristics of oxidized coal in re-mining coal seam
Meikuang Anquan, 2021 According to the current situation of spontaneous combustion of coal in the re-mining coal seam, the differences of spontaneous combustion characteristics of oxidized coal in Jinggezhuang Mine with four different re-mining times are analyzed.
ZHANG Yanfang, WANG Fusheng, WANG Jiantao
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Applied Sciences, 2023 The indicative ability of a gas indicator for the spontaneous combustion of coal is affected by the secondary oxidation of oxidized coal, from old goafs, entering a new goaf through air leakages.
Chaowei Guo +4 more
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Meitian dizhi yu kantanObjectiveThe central and western regions of China hold abundant shallowly buried coal resources. However, the accurate exploration and safe, efficient development of coal seams in these regions are confronted with serious challenges due to weathering and
Zhi MA +7 more
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Meikuang Anquan, 2022 In order to master the relationship between the key active groups of weathered coal and oxidized coal at the characteristic temperature of coal spontaneous combustion, this paper takes the fresh coal as the reference coal to compare and analyze the ...
ZHAO Jingyu +4 more
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