WEBApr 1, 2023 · Such structure is also conducive to adsorption of coal dust and reduction of coal dust production. In addition, this method enriches the preparation method of water injection material and provides a new preparation scheme of wettabilityincreasing agent.
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WEBAug 1, 2021 · Wang et al. focused on the wettability of respirable coal dust and the influence of functional groups of respirable coal dust on its wettability [36], [37]. Si et al. have proposed an improved effective diffusion system, which provides a reference for improving the wetting effect of coal seam water injection [38].
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WEBMar 5, 2022 · At this time, the coal dust has polluted the mine environment and it is difficult to control the breathing dust to a safe level in this way [9]. The other is to prevent coal dust before it is produced, such as coal seam water injection. Before coal mining, pressurized water is injected into the coal seam in front of the working face [10].
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WEBMay 1, 2022 · Pulverized coal injection (PCI) is generally used in modern blast furnace (BFs) ironmaking to reduce coke consumption by burning cheaper coal. ... (CROG) after CO 2 and dust removal, which mainly consists of CO and H 2, is proposed to be injected into an industrial BF operated with different oxygen enrichments. Such a process is .
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WEBJan 30, 2021 · Four types of meager and meagerlean coal and one type of highquality anthracite were selected based on the safety requirements for blast furnace coal injection and domestic coal quality to conduct microstructure and component analyses. The analyses of the organic and inorganic macerals and the chemical compositions of the .
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WEBApr 15, 2024 · This device can simulate the coinjection of pulverized coal and hydrogenrich gas into the blast furnace, enabling separate studies on each to emulate their combustion behaviors. It allows for the examination of variations in combustion rates when mixed and injected with coolants and combustion aids and the effects of different .
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WEBJan 15, 2022 · The propagation process of CH 4 /coal dust flames is complied, since it contains many chemical and physical phenomena and mechanisms [24, 25]. ... Turbulent unvented gas explosions under dynamic mixture injection conditions. Symp (Int) Combust., 23 (1) (1991), pp. 851858.
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WEBAug 1, 2022 · To further enhance the impact of water injection and dust reduction in the deep mining process of the coal mine, an efficient dust suppressant for water injection was synthesized by coupling a ...
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WEBMar 1, 2021 · However, there are few researches on the dust suppressant for coal seam water injection. Coal seam water injection which use high pressure to inject water into the cracks of coal seam is an indispensable process for underground mining and is of great significance in the prevention and control of dust, gas, impact ground pressure, thermal .
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WEBMar 1, 2019 · Dust pollution generated during the working process of a screening workshop in a coal washing plant seriously threatens the occupational health of workers. To improve the working environment for workers, we investigated the effects of various airflow parameters on the diffusion of dust particles and pollutants.
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WEBMar 5, 2022 · To further enhance the impact of water injection and dust reduction in the deep mining process of the coal mine, an efficient dust suppressant for water injection was synthesized by coupling a chelating agent and a surfactant. The optimal composition solution was determined by surface tension, pretreatment settling time and contact angle.
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WEBJan 1, 2024 · The coal seam gradually transitions from dry to fully wet, resulting in a typical unsaturated and saturated seepage process [13], Adding surfactants to water can reduce the surface tension at the solidliquid interface and enhance the wettability of water [14]. waterinjection dust reduction is the only technique that actively suppresses dust ...
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WEBMar 1, 2023 · Download Citation | Study on the influence of water injection pressure on water absorption process and water injection effect of coal | Rock burst disasters can be reduced and prevented with the ...
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WEBFeb 1, 2018 · On this basis, the high and low pressure combined coal seam water injection technique was designed and applied to the #1305 fully mechanized top coal caving face in the Dongtan coal mine, and dust ...
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WEBSep 11, 2020 · The pulverized coal injection (PCI) is pursued to reduce the hot metal production cost by replacingthe expensive metallurgical coke with the noncoking coal.
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WEBJun 1, 2022 · Coal accounts for approximately 60% of China's primary energy and is an important part of the energy structure (Li et al. 2015; Zhou et al. 2020b).The clean energy produced by the coal chemical process has less environmental pollution than direct combustion (Chen et al. 2020; Guo et al. 2020).Therefore, there will still be a large .
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WEBMay 1, 2020 · 5, 6 In addition, coal seam water injection can increase the water content of the coal mass, change the nature of the coal mass, and reduce the dust concentration during the mining process ...
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WEBIt also reduces potential ing in the cleaning plant. It targets both coal and quartz dust. Dust reduction is 20% 40%%. Use range is 1:1500 to 1:2000 product to water ratios. DDust 3LF. Similar to DDust LLF, but with an even lower ing formula. It targets both coal and quartz dust. Dust reduction is 20% 40%.
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WEBJan 15, 2023 · For a typical coal seam water injection process, several boreholes are drilled in the coal seam, and pressurized water is injected into the boreholes. The water is infiltrated in the coal seam to increase the moisture of the coal seam and reduce the dust generation during mining.
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WEBPulverized coal (PC) blending with ironbearing dust (IBD) injection technology in blast furnace (BF) ironmaking process was proposed to valorize the IBD. Three aspects containing the coflow property of PC and IBD, thermal reactivity and corresponding kinetics during the PC combustion process, as well as thermal variation and unburned PC ...
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WEBNov 1, 2022 · To further enhance the impact of water injection and dust reduction in the deep mining process of the coal mine, an efficient dust suppressant for water injection was synthesized by coupling a ...
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