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  • Estimate of sulfur arsenic mercury fluorine emissions

     · There are approximately more than 4.5 Gt of coal gangue cumulated which occupied more than 15 000 km 2 of land in China up to 2010 (Bian et al. 2009 Zhao et al. 2008). The annual production of coal gangue sharply increased after 2000 and the output exceeded 0.75 Gt

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  • Emission Factors of NOx SO2 PM and VOCs in

     · Co-burning of coal and coal gangue (raw material) in production weakened the correlation between sulfur contents in coal and SO2 EFI values. The using of organic solvents in drug making process promoted the emission of VOCs. SO2 EFs in factories with RFs were much lower than those factories without RFs.

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  • Research on the technology of detection and risk

     · The spontaneous combustion of coal gangue generates a large amount of toxic and harmful gasses such as SO 2 CO H 2 S and benzo(α)castor which pollute the atmospheric environment (Wang et al. 2016 Li et al. 2016 Wang 2013) and are more likely to cause more devastating disasters such as explosions.Regarding the photovoltaic power plant the toxic and harmful gasses produced by coal

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  • Ultra-repeatability measurement of the coal calorific

     · A total of 49 powdered coal samples certi ed by China Coal Research Institute (CCRI) were used in this experiment with a calori c value ranging from 2.28 103 Jg 1 to 32.50 103 J g 1 (Table 1). The C1 C2 and V1 samples with lower calori c values belong to coal gangue

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  • Synergistic analysis of co-combustion of sunflower straw

     · There is yet to be sufficient research on the synergistic effect of biomass and coal gangue combustion. In this paper the co-combustion of biomass and coal gangue in different proportions was studied. The coal gangue from Xilinguole Inner Mongolia China and sunflower straw in Jining Inner Mongolia China were studied.

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  • Mercury release during thermal treatment of two Chinese

     · The utilization of coal gangue in power plants has become a new anthropogenic discharge source of mercury and attracted much concern in China. It is crucial to obtain the information about the mercury release during thermal treatment of coal gangue. In this study the mercury release behavior of two coal gangues selected from two power plants were studied under different thermal treatment

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  • FDOFLQLQJFRDO JDQJXHIOPscience

     · Coal gangue which is a gray-black lump was obtained from Luliang Shanxi Province in China. The samples were crushed to below 5 mm with a jaw crusher and fully dried at

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  • Field and simulation study of the rational coal pillar

    The Madaotou (MDT) coal mine is in Datong City Shanxi Province China. The coal seam 5 is being mined at present. Its average thickness and buried depth are 13.8 and 415 m respectively and the dip angle is close to zero. The roof and floor of the coal seam 5 both comprise mudstones (Figure 2).

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  • Selenium in Chinese coal gangue Distribution

     · Coal gangue is considered a by-product of coal mining cleaning and utilization. Coal gangue accounts for a large proportion of the solid waste in China and is generated via coal washing and mining procedures which account for approximately 10–15 of raw coal production (Zhou et al. 2014c).The rapid growth of coal consumption and production has resulted in approximately 850 million tons of

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  • RECYCLING OF COAL GANGUE TO PREPARE LOW

     · alumina content. Coal gangue is a hazardous by-product of the coal mining industry and the average production of coal gangue is about 1015 of raw coal production 15 . The main composition of coal gangue is also SiO 2 and Al 2 O 3. The properties of ceramic proppants obtained by flint clay and coal gangue should be in some respects

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  • Decomposition of key minerals in coal gangues during

     · Thermal decomposition characteristics of kaolinite and dolomite during combustion of coal gangues in different O 2 /N 2 and O 2 /CO 2 mixtures simulating normal air and oxy-fuel combustion atmospheres were examined using thermogravimetric analysis (TGA) with a focus on the effect of O 2 and CO 2 concentrations. A kaolinite-rich coal gangue and a dolomite-rich coal gangue were studied

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  • Synergistic analysis of co-combustion of sunflower straw

     · There is yet to be sufficient research on the synergistic effect of biomass and coal gangue combustion. In this paper the co-combustion of biomass and coal gangue in different proportions was studied. The coal gangue from Xilinguole Inner Mongolia China and

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  • The Situation of NORM in Non-Uranium Mining in China

     · • NORM exposure to public from coal industry –normalized collective dose from air effluent within 80 km for coal power plant was 16.5 man-Sv/GWa and for coal gangue power plant was 7000 man-Sv/GWa. –Total annual collective effective dose to public from buildings with coal-slag bricks in China was 3 300 man-Sv/a

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  • Fluorine content and distribution pattern in Chinese coals

     · 6 six of the seven largest coal resource provinces— Sinkiang Inner Mongolia Shanxi Shaanxi Ningxia and Gansu. Second no explanation of sampling method was given. There can be great differences in fluorine content even in the same coal seam. Luo et al. (1994) studied Silurian stone coal in Shaanxi Province

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  • Co-combustion of municipal solid waste and coal gangue

     · of coal gangue (Zhang et al. 2015 Zhou et al. 2015). However there are fewer studies on the co-combustion of coal gangue and MSW which is meaningful for the synergistic utilization of solid wastes. The great differences between the coal gangue and MSW may influence the combustion behavior of the blends. Therefore the purpose of this study

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  • FDOFLQLQJFRDO JDQJXHIOPscience

     · Coal gangue which is a gray-black lump was obtained from Luliang Shanxi Province in China. The samples were crushed to below 5 mm with a jaw crusher and fully dried at

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  • Radiation characteristics of natural gamma-ray from coal

     · Radiation characteristics of coal and roof-rock samples. We can know from the analysis that the content of the radionuclide in the sedimentary rocks is related to the content of clay minerals the

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  • Province in South of China the Xiang-tan Liejiaqiao coal

    gangue can cause serious pollution on air soil and water through dust generation coal-mining waste leachate products self-ignition and so on (Ciesielczuk et al. 2014 Fundikwa 2016). In the past

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  • Coal-rich city eyes green economyChina Daily

     · After power generation coal and coal gangue turn into coal ash which was also thought to be useless in the past. But the ash contains metals including alumina and silica which can be extracted.

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  • Coal-rich city eyes green economyChina Daily

     · After power generation coal and coal gangue turn into coal ash which was also thought to be useless in the past. But the ash contains metals including alumina and silica which can be extracted.

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  • Shanxi takes the lead in going greenMajor Newschinadaily

     · The governor said Shanxi is also looking to achieve a circular economy by extending the industry chain of coal. For example he said while excavating coal there is always coal gangue

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  • Research on Potential Fertilization of Coal Gangue in the

    Statistics 19 show that approximately 3000 hills of coal gangue exist in China the stockpile of coal gangue has reached 4.6-5.0 billion tons and occupies 65 000 ha of land and 0.2 billion

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  • Coal-rich city eyes green economy Economy chinadaily

     · After power generation coal and coal gangue turn into coal ash which was also thought to be useless in the past. But the ash contains metals including alumina and silica which can be extracted.

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  • Astorite Rock Gem Magazine

     · Astorite is a rare rock composed mostly of pink rhodonite along with various amounts of quartz (mostly in the form of chalcedony) rhodochrosite gold silver and other minerals. Astorite is a trade name given to this material to honor its original mine owner John Jacob Astor IV.

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  • Co-combustion of municipal solid waste and coal gangue

     · of coal gangue (Zhang et al. 2015 Zhou et al. 2015). However there are fewer studies on the co-combustion of coal gangue and MSW which is meaningful for the synergistic utilization of solid wastes. The great differences between the coal gangue and MSW may influence the combustion behavior of the blends. Therefore the purpose of this study

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  • FDOFLQLQJFRDO JDQJXHIOPscience

     · Coal gangue which is a gray-black lump was obtained from Luliang Shanxi Province in China. The samples were crushed to below 5 mm with a jaw crusher and fully dried at 105 ± 0.5 ºC in the oven.

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  • Zhichao LiMcDonnell International Scholars Academy

    Coal producers are motivated since they could also make a fortune from planting cash trees. At Shuozhou in Shanxi province where the natural conditions are harsh for plants Mongolian pines are used to cover the coal mines and bring water from the Yellow River. The investments also come from a coal-mining company as well as local government.

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  • Doing Business in Shanxi -- china.cn

     · The coal recoverable reserves in Shanxi is more than 258 billion tons and the annual output of raw coal is approximately 0.5 billion tons accounting for one third of the total output of China.

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  • China Fire Extinguishing Project Of Coal Gangue

    There is a large-scale spontaneous combustion phenomenon in Gushuyuan Coal Mine of Shanxi Jincheng Anthracite Mining Group Company Limited. The temperature in the spontaneous combustion area can reach 200 600°C the maximum relative height difference of the terrain in debris heap is 147m and the slope is in the basically stable state.

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  • Characterization of dissolved organic matter derived from

     · Organic and nitrogen pollutants in mine water could be removed effectively during the storage and transport of water in a coal mine underground reservoir packed with coal gangue through various water-rock interactions. However little is known about the effect of the released dissolved organic matter (DOM) derived from the packed matrix on their removal. Column experiments were performed at a

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  • Synergistic analysis of co-combustion of sunflower straw

     · There is yet to be sufficient research on the synergistic effect of biomass and coal gangue combustion. In this paper the co-combustion of biomass and coal gangue in different proportions was studied. The coal gangue from Xilinguole Inner Mongolia China and sunflower straw in Jining Inner Mongolia China were studied.

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  • The Potential Environmental Impact of PAHs on Soil and

     · in China 40–42 . The amount of coal gangue dumped into the environment is increasing at a rate of 1.5 to 2.0 billion tons per year. In Shanxi Province the province with the highest coal production in China 43 there are more than 300 coal waste piles and the coal wastes generated in 2008 were more than 3.1 Gt occupying a land area of

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  • Pore pressure evolution and mass loss of broken gangue

     · The gangue was taken from about −325 m strata in Xiaojiawa coal mine in Shanxi province of People s Republic of China. The density of the gangue is ρ s = 2.32 10 3 kg m −3 the crushed gangue is separated into five groups a (2.5–5.0 mm) b (5.0–8.0 mm) c (8.0–10.0 mm) d (10.0–12.0 mm) and e (12.0–15.0 mm) screened by the

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  • Concentrations of Lithium in Chinese Coals

     · the world. Lithium has never been reported as a coal associated deposit before. In order to study the concentrations in Chinese coals 159 coal and gangue samples were taken from six coal mines and were determined by ICP-MS and the minerals in the samples were identified by X-ray powder diffraction. The

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  • Concentrations of Lithium in Chinese Coals

     · the world. Lithium has never been reported as a coal associated deposit before. In order to study the concentrations in Chinese coals 159 coal and gangue samples were taken from six coal mines and were determined by ICP-MS and the minerals in the samples were identified by

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  • (PDF) Environmental characterization of burnt coal gangue

    Environmental characterization of burnt coal gangue banks at Yangquan Shanxi Province China

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  • Comprehensive utilization and environmental risks of coal

    Abstract The amount of coal gangue a by-product of coal mining and washing is rapidly increasing with the growing trend of energy consumption. The accumulated coal gangue without appropriate utilization has resulted in a squander of resources waste disposal and environmental pollution issues. Over the past few decades there has been wide attention in developing strategies for the

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  • Mercury release during thermal treatment of two Chinese

     · The utilization of coal gangue in power plants has become a new anthropogenic discharge source of mercury and attracted much concern in China. It is crucial to obtain the information about the mercury release during thermal treatment of coal gangue. In this study the mercury release behavior of two coal gangues selected from two power plants were studied under different thermal treatment

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  • Environmental characterization of burnt coal gangue banks

     · Samples of coal gangue fired coal gangue and CFGM condensates on the external side of a gas vent were collected in order to fully characterize the chemical and mineralogical composition and to deduce the atmospheric emissions and the leaching potential of elements of major environmental concern.Samples were collected from a terrace of a large coal gangue bank located 1 km to the south

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  • Pressure reduction mechanism and effect of working face

    The Huasheng Hufeng coal mine of Datong Coal Mine Group is a typical resource reorganization mine which is in Hedong coalfield in Shanxi Province China as shown in Figure 1. At present the 2# thick coal seam was the main mining layer with an average thickness of 6.0 m an average inclination

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  • Coal National Geographic Society

    Coal is a black or brownish-black sedimentary rock that can be burned for fuel and used to generate electricity is composed mostly of carbon and hydrocarbons which contain energy that can be released through combustion (burning). Coal is the largest source of energy for generating electricity in the world and the most abundant fossil fuel in the United States.

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  • Concentrations of Lithium in Chinese Coals

     · the world. Lithium has never been reported as a coal associated deposit before. In order to study the concentrations in Chinese coals 159 coal and gangue samples were taken from six coal mines and were determined by ICP-MS and the minerals in the samples were identified by

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