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 ...
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 ...
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, .
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 ...
WEBJun 1, 2024 · Highpressure water injection can crush coal blocks, increase the fracture density in a coal body, change the stress state of a coal body around a water injection borehole, and improve the permeability of a coal seam, all of which help to realize highefficiency gas emission [14], [15], [16], [17].
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.
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 .
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 .
WEBApr 10, 2020 · Abstract The article considers a mathematical model of the combustion zone of a blast furnace working with the use of the injection of coaldust fuel. In this model, two subsystems were identified: (1) subsystem of heating the particles of coal dust and volatiles released in the combustion zone; (2) subsystem of heat exchange and .
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 ...
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].
WEBJan 19, 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 ...
WEBDec 21, 2022 · Pulverized coal (PC) blending with ironbearing dust (IBD) injection technology in blast furnace (BF) ironmaking process was proposed to valorize the IBD.
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 .
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
WEBJun 1, 2014 · The combustion efficiency of pulverized coal particles in a blast furnace depends strongly on the particle flow behaviors and the shape of the main combustion zone,, the raceway shape.
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.
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 .
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 .
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.
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 .
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 .
WEBApr 1, 2022 · Then, (partial) reduction starts, where oxygen is (partially) removed from nickel and iron oxides by CO from coal gasifiion [1], [4]. ... Therefore, the dust injection process may promote the formation of rings in the reduction zone of the rotary kiln.
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 ...
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 .
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 .
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 ...
WEBAug 4, 2022 · In China, coal seam water injection technology is widely used in the prevention and control of mine gas and dust disasters. The evolution law of stress–seepage field in the range of hydraulic influence in the process of coal seam water injection is the most basic theoretical problem in coal seam water injection technology. Therefore, this .
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