WEBApr 1, 2023 · Bituminous coal (BC) poses a challenge to the implementation of coal seam water injection technology due to its high investigate the wetting interface characteristics between water molecules and BC, the wetting process of BC was analyzed based on pore evolution and molecular dynamic theory. It is found that there is .
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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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WEBAug 9, 2017 · When a coal seam is injected with pressurized water, it can be opened by the water pressure seepage, and then channels will be formed and saturated with water in the seam. Cheng et al. (2012, 2013) investigated the microscopic process of water injection in coal seams, and determined the main influencing factors of coal seam water injection.
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WEBMay 1, 2023 · Section snippets Experimental materials. Coal samples were prepared from 1/3 coking coal Lu Wa (Jining, Shandong), which was crushed into dust particles (D 50 ﹤16 µm) by using a ball grinder (PBM2A, Changsha zng chemical machinery, Changsha, China). The anionic surfactant A, B and nonionic surfactant C, D .
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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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WEBFeb 1, 2018 · 1. Introduction. Highpressure water injection has been globally adopted in coal exploitation for the prevention and control of coal dust as well as disasters, such as rock burst and coal and gas outbursts [1], [2], [3], [4].For the prevention and control of coal and gas outbursts, highpressure water injection is preferred, as it can crush coal block .
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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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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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WEBNov 2, 2021 · 1. Introduction. Being one of the most primary solid waste emissions in the steel production process, metallurgical dust and sludge (MDS) are primarily produced in dry or wet dust collection and metallurgical wastewater treatment systems. 1 In 2020, the output of MDS in China reached ∼110 million tons, and most of this output has currently .
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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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WEBProcess and Metallurgy Shriram EPC provides turnkey contracting solutions which include Design, Engineering and Construction for: ... Installation of COAL DUST INJECTION SYSTEM in Blast Furnaces 2 3 on turnkey in consortium SSIT, China, CISRI, China SAIL IISCO Steel Plant, Burnpur ...
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WEBNov 10, 2011 · As flowrate increases, the entrainment of coal dust into the pipe increases due to increased venturi effect. This is shown in Fig. 5, where the mass of dust injected (grams per minute) is plotted as a function of the airflow rate in gpm. The variation of the coal dust injection rate is nonlinear for air flowrates up to gpm. After this ...
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WEBDec 19, 2023 · Drilling parameters. During coal mining, gas extraction and coal seam water injection require the implementation of a large number of coal seam boreholes, and the coal drill bit is the most commonly used drill bit in the process of coal seam drilling (Lu et al. 2011).In this study, diamond composite sheet coal drill bits with diameters of 28, .
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WEBJun 15, 2023 · The characteristics of pulverized coal injection of blast furnace ironmaking include basic performance (ash, sulfur, and fixed carbon) and process performance (ignition point, explosibility, grindability, ash fusion temperature, combustibility, and reactivity), which is an important basis for the selection of coal types for pulverized coal .
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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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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 5, 2023 · Coal seam water injection, as an important disaster prevention means in the process of coal mining, can effectively suppress coal dust, add water injection additives, can effectively improve the ...
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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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WEBMay 1, 2022 · The coal consists of raw combustibles and inert ash. Coal particle is assumed to be a sphere with a swelling core and modeled by the Lagrangian particle tracking (LPT) method [2], [22]. In simulations, the devolatilization process of raw combustibles releases the Volatile Matter (VM) into the gas while leaving the char in the .
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WEBFeb 15, 2022 · The water wettability of coal dust was very important for dust control when using waterbased dust suppressant materials. The coal dust wettability strengthened by surface active ionic liquid was studied in this paper. The surface activity of ten ionic liquids with different anions Cl−, Br−, [BF4]−, [NTf2]− and ions [HOEtMIm]+, [Cnmim]+ (n = .
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WEBMar 2, 2022 · Float dust deposits in coal mine return airways pose a risk in the event of a methane ignition. Controlling airborne dust prior to deposition in the return would make current rock dusting ...
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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 11, 2021 · In coal mines, the most common approaches to control dust are hydraulic methods, such as water spray, and coal seam water injection. The wettability of coal dust is the key factor to determine the ...
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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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WEBDec 17, 2019 · The effect of dust reduction applied to onsite coalbed water injection is significant, with the average dust reduction rates during coal cutting and support moving being % and % ...
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WEBApr 29, 2015 · HRG injection in dust coal also contributes to reducing the. carbon monoxide concentration, especially the OH radical, in. ... process is repeated for 24 h, which is the limit of the operation.
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WEBJul 27, 2022 · In order to obtain the propagation and attenuation characteristics of a shock wave gas–coal dust explosion, a diagonal pipeline network was built to carry out a gas–coal dust explosion experiment.
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WEBJul 1, 2022 · Coal seam water injection technology is widely used in most coal mines at home and abroad, and it is a basic dustproof measure in coal mining face (Wu et al., 2012). Coal seam water injection can achieve the purpose of wetting coal in advance, which can reduce the dust produced at the source in the process of mining.
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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 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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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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