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 · 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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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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WEBFeb 1, 2013 · The use of biomass dust as a fuel in reciproing engines could be of great interest because it could combine the versatility of the ICE with the large availability and the CO 2neutral impact of biomass, with respect to coal, (see Table 1) biomass fuels generally have a lower ash and sulphur content (and ash can be easily removed by .
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WEBMar 11, 2021 · In order to explore the microwetting process of coal dust, this paper uses molecular dynamics simulation to study the microwetting process of coal dust in different simulation conditions. ... Coal seam water injection is a fundamental and efficient method to prevent and control dust from its source (Cheng et al. 2012). In terms of mining and ...
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WEBAs shown in Fig. 1, it is the device used in this experiment to test the ignition process and explosion propagation of industrial dust, also known as the Hartmann tube internationally, it is drawn using the 3D modeling software experimental system mainly consists of transparent glass tube, ignition electrode, diffuser, air compressor, and .
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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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WEBFeb 25, 2016 · The issue of generating dust waste is present in steel and foundry plants around the world, as all melting furnaces generate tonnes of dust every year. This dust is obviously considered to be a waste material; however, the dust itself still contains certain chemical elements (mostly iron and zinc) which can be utilised by being returned to 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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WEBCoal dust is a finepowdered form of coal which is created by the crushing, grinding, or pulverization of coal rock. Because of the brittle nature of coal, coal dust can be created by mining, transporting, or mechanically handling it.. Grinding or pulverizing coal to a dust form before combusting it improves the speed and efficiency of burning, which makes .
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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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WEBFeb 23, 2024 · In the fields of coal dust control and coalbed methane (CBM) development, wettability is a crucial parameter of coal, often determined by the coal–water contact angle (CA). In order to construct an accurate CA prediction model, extensive data on industrial components, element content, and coal CAs were collected. Two sets of data were .
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WEBJan 7, 2019 · The essence of water infusion is to wet the intact coal seam in advance, thus the occurrence of floating coal dust in the process of coal extraction will be reduced or eliminated. By injecting water into the coal body through water injection boreholes, the water is distributed evenly in the network of cracks and pores in the coal body, and the ...
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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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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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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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WEBApr 1, 2012 · It is visible from data in the Fig. 5: after the adoption of the designed water injection process for the coal seam water infusion, the dust concentration of the working face has been reduced greatly, with % average dust fall rate of the total dust, % of the average dust fall rate of the respiratory dust, and the dust fall effect is ...
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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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WEBJul 1, 2022 · Coal seam water injection is one of the important means of mine disaster prevention, which helps to restrain the production of dust and reduce gas concentration. Ionic surfactant can change the capillary force of water in coal pore fissures, so as to enhance the wetting effect of coal seam water, the research on the .
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WEBFeb 26, 2019 · In this paper, the effect of complex fractures on the impact of a lowpressure coal seam water injection was investigated by dividing the fractures in the coal into two egories (namely a plane fracture and surface fracture), of which there were eight types. Numerical simulations were then conducted on the water injection process in .
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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 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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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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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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