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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WEBDOI: / Corpus ID: ; Preparation and characterization of a wettingagglomerationbased hybrid coal dust suppressant article{Fan2018PreparationAC, title={Preparation and characterization of a wettingagglomerationbased hybrid coal dust suppressant}, author={Tao Fan and Gang Zhou .
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WEBMar 29, 2024 · After coal seam water injection, coal mechanical properties will change with brittleness weakening and plasticity enhancement. Aiming at the problem of coal damage caused by the coal seam water injection process, based on nonlinear pore elasticity theory and continuum damage theory, a nonlinear pore elastic damage model .
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WEBNov 15, 2023 · 1. Introduction. Coal seam water injection can prewet the coal body, increase the water content [1], [2], reduce dust generation [3], [4], change the physical and chemical properties of coal [5], [6], and promote gas desorption mining [7], [8] to control coal mine disasters such as coal and gas outbursts, rock bursts, and coal dust. .
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WEBJan 1, 2023 · Semantic Scholar extracted view of "Thermal reactivity and flowability of pulverized coal blending with ironbearing dust injection in blast furnace process" by Qiangjian Gao et al. ... {Gao2023ThermalRA, title={Thermal reactivity and flowability of pulverized coal blending with ironbearing dust injection in blast furnace process}, .
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WEBApr 25, 2012 · Smelting in two different blast furnaces is considered on the basis of a multiband model, which relates the processes that affect the smelting conditions to the final outcome. The analysis focuses on conditions in which the coaldust consumption varies widely, as well as the distribution of materials over the furnace radius. New results and .
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WEBMar 1, 2023 · To solve the problem of water injection in low–porosity and low–permeability coal seams, a new idea of liquid CO 2 cyclic cold soaking to improve the water absorption and wetting efficiency of coal is proposed. The evolution of the pore structure and mechanical properties of coal were studied using low–field nuclear magnetic resonance .
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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 1, 2019 · The injection pressure of the dust can be varied from 0 to bar, and the volume of the constanttemperature furnace is 220 mL. Download : Download highres image (228KB) ... Experimental process. The MITs of coal dust clouds were determined according to the measurement procedures defined in EN ISO/IEC .
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WEBDOI: / Corpus ID: ; Multifactor numerical simulation study on spray dust suppression device in coal mining process article{Xu2019MultifactorNS, title={Multifactor numerical simulation study on spray dust suppression device in coal mining process}, author={Changwei Xu and Wen Nie and .
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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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WEBFeb 23, 2023 · The wetting behavior of droplets during impacting coal surface widely exists in the dust control process. Understanding the effect of surfactants on the diffusion of water droplets on coal surface ...
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WEBMay 2, 2023 · About Pulverized Coal Injection (PCI): PCI is a process which involves injecting large volumes of fine coal particles into the raceway of the blast furnace (BF). It is an essential instrument for modern blast furnace ironmaking. PCI provides auxiliary fuel for partial coke replacement and has proven both economically and environmentally .
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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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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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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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WEBAug 18, 2022 · In addition, due to the release process of volatile in dust particles, there will be a lowtemperature area with volatile enrichment in the interior of the flame peak, so the flame summit gradually develops in a ring shape. ... In addition, the simultaneous injection of pulverized coal and dust increases the number of particles, resulting in ...
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WEBThermal reactivity and flowability of pulverized coal blending with ironbearing dust injection in blast furnace process Qiangjian Gao, Xuhang Xiao, Zhiyuan Suo, Fang Long, Fengman Shen Article 102598
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WEBSurfactant can improve the wettability of water to coal, which is beneficial to reduce the production of coal dust in coal seam water injection. Through the measurement and calculation of contact angle and its decay rate, the wettability differences of SDS (C 12 H 25 OSO 3 Na), AES (C 14 H 29 O 5 NaS), OP10 (C 18 H 30 O 10 ), and JFC (RO(CH 2 ...
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WEBMar 1, 2021 · 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 damage and spontaneous combustion [15, 16]. The mechanism of dust control by water .
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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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WEBMay 27, 2020 · During transportation and storage, coal produces a lot of dust, which pollutes the environment and threatens the occupational health of workers. Although many dust suppressants have been developed for dust prevention at work, the implementation of current dust suppressants does not meet the requirements due to various factors such .
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WEBJan 19, 2024 · Coal seam water injection is a widely employed strategy to mitigate dust in coal mines, and the effectiveness of water injection is intriely linked to the internal pore and fracture structure of the coal. During the process of coal mining, the stress induced by mining activities has a significant impact on the pore and fracture structure of ...
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WEBOct 15, 2021 · On the one hand, primary coal dust can be wetted and bonded through water injection, making it lose the flying ability when coal body broken; on the other hand, the plasticity of coal body is improved due to the increased water content, resulting in a reduce of the dust production in the crushing process [32], [33]. The dust reduction ...
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