Coal gangue powder can coexist stably with asphalt molecules, which basically eliminates the weakening of mechanical properties and environmental pollution caused by the escape of coal gangue powder asphalt mixture in actual use. Adding coal gangue powder to asphalt not only protects the environment, but also optimizes resources.
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The coal powder used in this paper was all meager lean coal. Coal sample was broken into powder by a ball mill, and then sieved through 100, 120, 150, 180, 200 mesh standard sieves. ... Evaluation of the effect of adsorbed gas and free gas on mechanical properties of coal. Environ. Earth. Sci., 78 (2019), p. 218, /s.
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Coal gangue is the largest solid waste produced by coal mines, accounting for about 10% of coal production. The annual emissions of coal gangue in China is about 150200 million tons. Coal gangue causes solid, liquid and gas pollution, which not only wastes resources, energy and occupies a large amount of land, but also pollutes the ...
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It is the first time to use activated coal gangue powder (CGP) to improve the properties of CGGCFB. • CGGCFB is a promising way for coal gangue recycling in coal mining. • CGGCFB with 50%∼75% activated CGP content is suggested. • The influence mechanism of activated CGP on the properties of CGGCFB is determined. •
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Ding et al. [26] treated CG powder by titanate coupling agent and demonstrated the coupling agent was successfully grafted on the surface of CG via XPS and Fourier transform infrared spectroscopy (FTIR). Thus, the mechanical properties and thermal stability of highdensity polyethylene filled with modified CG were improved.
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International Advanced Research Centre for Powder Metallurgy New Materials. dec. 2013 mrt. 2014 4 maanden. Hyderabad, India. Worked along with an excellent team of scientists and research associates at ARCI on developing a scalable process for the production of highquality zirconia and titania nanoparticles at low costs.
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Updated on September 01, 2021 Coal is a sedimentary black or dark brown rock that varies in composition. Some types of coal burn hotter and cleaner, while others contain high moisture content and compounds that contribute to acid rain and other pollution when burned.
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Coal dust endangers the health and safety of workers in underground coal mines. Therefore, developing coal dust suppressants with dust prevention and explosionproof properties is critical. The influence of molasses on the explosion and decomposition of the coal dust deposited in underground mines was investigated using 20 L explosion experiments and thermogravimetric and differential thermal ...
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DOI: / Corpus ID: ; Study on the influence mechanism of activated coal gangue powder on the properties of filling body article{Qiu2022StudyOT, title={Study on the influence mechanism of activated coal gangue powder on the properties of filling body}, author={Jishen Qiu and Kun Cheng and Ruyi Zhang and Yang Gao and Xiao Guan}, journal={Construction and ...
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To investigate the static and dynamic mechanical properties of coal gangue aggregate concrete (CGAC) in mine support ... analysis (TGA), X‐ray diffraction (XRD), and scanning electron microscopy (SEM). The study revealed that coal gangue powder exhibited optimal volcanic ash activity when subjected to high‐temperature calcination at ≈600 ...
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A copper powder with a purity exceeding % is available, and, of course, the individual particles have the same properties as massive copper. However, it is impractical to achieve a density of g/cm 1 by pressing and sintering alone, and, therefore, the properties of P/M parts are influenced by the density attained.
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In order to reduce the dust pollution caused by the coal mining process, a novel composite environmental dust suppressant for coal dust control was synthesized by corn straw, sodium carboxymethyl cellulose (CMC), and additives. This study focused on the preparation conditions of the dust suppressant, and the performances of which were investigated systematically. Response surface method (RSM ...
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Therefore, in this study, a method for constructing artificial coal specimens was developed and implemented, and the mechanical properties of the artificial coal specimens obtained using this method were studied. The main components of artificial coal were quartz sand, barite crystal powder, gypsum, cement, watersoluble cloth, and coal powder.
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BackgroundWalnut kernels are high in polyphenols (PPs), which cause low protein solubility, limiting the use of walnut protein in the food industry. To obtain the best technical parameters of the dephenolization treatment, the defatted walnut powder was dephenolized using ultrasound‑assisted ethanol extraction (UAE), and the response surface optimization was performed on the basis of single ...
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CG has a low carbon content, and a lot of coal powder adheres to the surface of CG, which is needlelike, loose and porous, and brown and black in color. ... Lin C. Compressive and Flexural Properties of UltraFine Coal GangueBased Geopolymer Gels and Microscopic Mechanism Analysis. Gels. 2022; 8:145. doi: /gels.
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Coal breakage energy can be reduced using gas adsorption. The mechanism by which gasbearing tectonic coal breaks down is critical for preventing coal and gas outbursts. For tectonic coal particles from two coal mines with a size range of 23 mm, a total of 67 sets of crushing experiments were performed under various gas adsorption pressure ...
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2) Microscopic effects of coal gangue on the mechanical properties of CGPRAC. a) As the replacement ratio of CGP increased, the internal structure of CGPRAC became more porous and looser. b) As the replacement ratio of coal gangue fine powder increased, the calciumsilicon ratio (Ca/Si) in the cement paste increased. The cement paste with a ...
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The management of overburden (OB) materials needs proper attention to safe mining operations. Several mine OB dump failures have been occurred due to inappropriate geotechnical and geometrical parameters. Increasing consumption of coal in thermal power plant also generates huge amount of ash which adversely affect the environment and its utilization is a great challenge. The present paper ...
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The relation between the physical properties of the fired CSK powder compacts and the phase transformation, microstructural evolution was also investigated. ... Coal series kaolin powder (from Shanxi Jin Haiyang Energy Group Co., Ltd, Shanxi, China) which had been sieved with 250mesh sieve, was employed in the present study.
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He X, Liu X, Song D, Nie B (2019) Effect of microstructure on electrical property of coal surface. Appl Surf Sci 483:713720 ... Qian S, Kai D (2019) The effect of adding surfactant to the treating acid on the chemical properties of an acidtreated coal. Powder Technol 356:263272. Article Google Scholar Kong B, Wang E, Lu W, Li Z (2019a ...
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The variation of coal sample composition and molecular structure with temperature the dry distillation zone was studied by Fourier transform infrared (FTIR), Xray diffraction (XRD). The FTIR experimental equipment is NICOLET380 infrared spectrometer (Fig. 3). The heated coal powder is mixed with KBr in a ratio and evenly ground in an agate mortar.
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The chemical properties of coal are as follows:Moisture: As all the coals are mined in wet conditions, thus the moisture content in the coal is an important factor. Groundwater and other extraneous moisture is known as adventitious moisture and can easily be evaporated. The coals trapping the moisture in itself is known as inherent moisture ...
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Coal powder was loaded into the coal sample tank, the valve was in the desorption state, the temperature of the thermostat was set to 105 °C, and the coal powder was desiccated for at least ...
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Flow properties are the foundation of powder technology, which determine the behavior of powders in bins, hoppers, feeders, and other handling equipment. Therefore, the characterization of flow properties of pulverized coal is an important requirement for engineers to deal with flow problems and equipment design.
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Australia: More than 100 people charged after kayaking protesters block coal port ahead of COP28. Responding to news reports that more than 100 protesters, including young people, were arrested over the weekend after demonstrating against government inaction on the climate crisis ahead of the coming COP28 summit in Dubai, Amnesty International's Pacific researcher Kate Schuetze said:
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Environmental Science and Pollution Research Article Research Article Published: 26 November 2021 Physicochemical characteristics of pulverized coals and their interrelations—a spontaneous combustion and explosion perspective Devi Prasad Mishra Environmental Science and Pollution Research 29, ( 2022) Cite this article 282 Accesses
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Coal is slightly denser than water ( megagram per cubic metre) and significantly less dense than most rock and mineral matter (, shale has a density of about megagrams per cubic metre and pyrite of megagrams per cubic metre).
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Coal gangue and feldspar powder were used as raw materials, and clay was deemed to be a binder, sintering artificial aggregates. The effects of the change of raw material ratio and sintering temperature on the physical properties, micromorphology, crystal composition and metal leaching of artificial aggregates were explored.
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Effects of coal properties on leanblowoff limit for a large scale burner. The effects of diameter on ignition performances for the wood powder were examined in detail. Figure 26(b) shows relationships between fuel concentrations and flame propagation velocities.
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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