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 demand for coal in the future.
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Therefore, in the process of coal mining, it is necessary to pretreat the coal to reduce the generation and diffusion of coal dust. Theoretically, coal seam water injection is an important means to fundamentally reduce coal dust generation, and coal seam water injection fracturing technology has good fracturing and wetting effects on high ...
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Preparation process. ... The dispersion of coal dust on roadways adversely affects the productivity of coal mines and threatens the lives of mine workers. ... which was important for improving the effect of coal seam water injection and reducing the dust concentration. Investigation on the effect of functional groups on the wettability of coal ...
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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 wettability of coal body, improve the permeability of coal body, so as to achieve the prevention of rock .
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Wuhan Iron and Steel Company developed a new red iron manufacturing technology by using BOF dust, which was a new ways for BOF dust recycling [5]. However, the research of injection of BOF dust ...
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Process Automation Simulation Pulverized coal injection (PCI) Pulverized Coal Injection (PCI) using the denseflow method The Küttner developed and perfected denseflow method offers several advantages over a lowerdensity system.
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In the process of coal seam water injection and spray dustfall, the dust fall rate of total dust and dust is approximately 30%40% without adding any surfactants. In this study, to compare and analyze the application effect of the developed new materials, we compared the strong permeability and moisturizing material (SACB) with the traditional ...
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In the process of applying surfactant, the surfactant concentration is a key parameter, which directly affects coal's wettability ... Table 3 shows that the reduction rates of total dust and respirable dust of ordinary coal seam water injection were % and %, respectively. This was due to the expansion of the wetting range and the ...
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Coal seam water injection is one of the important technical means to prevent mine disasters. It can effectively change the mechanical properties of coal, prevent dust, coal and gas outburst, and reduce gas concentration. In order to expand the range of coal seam water injection, make coal seam water injection more effective in wetting coal mass, and determine the effective type of ionic ...
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However, the process of coal mining is often accompanied by disasters such as coal and gas outburst, which impose severe restrictions on the highefficiency exploitation of coal resources [[2], ... Study on application of surfactant compound in coal seam water injection for dust reduction. China Saf Sci J, 30 (10) (2020), pp. 9195. Google Scholar
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Studying the seepage process in fracture channels (where coal particles are deposited) is of great significance for improving the performance of both onsite coal seam water injection and dust ...
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Other dust recovery techniques applied in pyrometallurgical processes are pelletizing and submerged injection [8], [9]. This work uses data analytics techniques to gain insight into the operation before and after dust insufflation in the rotary kiln furnace of a 180 t h −1 RKEF ferronickel production process.
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The process of water injection in coal seams describes the permeation behavior caused by the action of ground stress and water injection pressure. To study how ground stress and water injection pressure affect water expansion in the coal seam, based on the correlation between the electrical conductivity of coal and its water content, this study designs a coal humidity detection system that ...
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In order to reveal the migration mechanism of dynamic water between coal particles in the process of coal seam water injection, in this study, nuclear magnetic resonance experiments (NMR) were ...
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However, a large amount of dust is generally produced in the process of underground mining of coal resources. Dust can cause explosion accidents and induce pneumoconiosis, which has become the primary hazard to coal mine safety and the occupational health of workers (Han et al., 2018, Xu et al., 2018, Xue et al., 2021).
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In the pulverized coal injection (PCI) process of a blast furnace (BF), intensifying the combustion of pulverized coal in the raceway and tuyere is the key to increasing the injection ratio. 3, 4 In addition to widely used technologies that cooperate with PCI, such as oxygen enrichment and high temperature of hot blast air, 5, 6 the catalytic c...
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When granular coal was injected into blast furnace, it would partially replace coke, thus lowering the coke ratio. During the coking process, 16% of the energy was used to produce coal gas, and the rest was used to produce coke. By comparison, the energy consumption of granular coal production was only 2% of coke.
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In the process of coal mining, a large amount of methane is emitted into the atmosphere every year, which enhances the greenhouse effect of the atmosphere. ... This paper lays a theoretical and experimental foundation for the development of a new technology for coal seam water injection dust prevention. View all citing articles on Scopus. View ...
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replace the amount of coke with coal dust in the range of coke / CDI. KEYWORDS: blast furnace, coke, injection of coal dust (CDI), material balance 1. Introduction In advanced ironmongery, the development of this process has grown since 1983, so over 100 plants currently consume 20 million tons of energy per year,
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Explosions Stages of a coal dust explosion. Top, Beginning stage of a propagating coal dust explosion. Middle, The flame front appears behind the shock wave. Bottom, The cycle continues with the shock wave lifting coal dust and the lagging flame front igniting and propagating the explosion.
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Pulverized coal (PC) blending with ironbearing dust (IBD) injection technology in blast furnace (BF) ironmaking process was proposed to valorize the IBD.
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For dust particles of d p >1 μm, inertial collision dominates the collection and settling process of dust Optimization of nozzles The nozzle is the most important component in the liquid atomization process, with nozzle performance significantly affecting the dust suppression effect of spraying (Han et al., 2020; Wang et al., 2019i; 2020a).
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The coal sample used during this study was obtained from a steel work plant of the PanZhiHua Iron and Steel Group in Sichuan, China, and is being applied in the pulverized coal injection (PCI) process in a BF. The coal samples are a blended coal with a blend mass ratio of anthracite to bituminous coal of 8:2.
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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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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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Recent research on liquid spray additives for coal dust suppression has been focused on enhancing the wetting ability while neglecting the mitigation of dust reentrainment issue. ... Experimental synthesis and performance comparison analysis of highefficiency wetting enhancers for coal seam water injection. Process Safety and Environmental ...
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Introduction. During integrated steelmaking, coal is typically used in the blast furnace to offset the use of metallurgical coke as a fuel as it is more costeffective particularly with the global scale extreme pressures on coke at present, the EU has enlisted coke as a critical material [Citation 1].The amount at which the coke can be offset is highly dependent on the chemistry of the coal.
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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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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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