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 ...
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 ...
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 ...
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).
Water infusion is the process of injecting water with or without surfactant under a certain pressure into the coal seam ahead of working face.
A large amount of dust will be produced in the process of mine production and construction. Coal dust has great harmfulness, endangering human health, accelerating the wear of mechanical equipment, polluting the mining environment, and even inducing coal dust explosion accidents [3], [4], [5].
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 ...
The coal consumption in our country mainly lies in coalfired power stations and industrial boilers. Since the temperature change in the furnace influences combustion, slagging In the pulverized coal combustion process, turbulence impacts the radiation transmission of the medium by changing the shape of the flame, and the heat release acts on the turbulence field by changing the ...
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.
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,
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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1. Introduction. Coal will remain dominant in energy supply in the short term from the perspective of China's resource endowment characteristics and current social and economic development needs [1], [2].The "dual carbon goals" of achieving peak carbon emissions before 2030 and carbon neutrality by 2060, has been raised as China's national strategy, and the coal industry will usher in ...
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 stressseepage 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 paper first uses the radial seepage experimental ...
Background Iron is a metal that has fundamentally affected the way of life of human beings ever since the Iron Age. It is relatively abundant and can easily be extracted and modified due to its useful material properties, all of which result in low prices.
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 ...
Pulverized coal injection (PCI) in the dome zone of the COREX MG is used to transform the oxygen burners (OBs) into oxygencoal burners (OCBs) and cooperates with the dust burners (DBs) to realize the function of gasification.
Coal seam water injection is vital in mitigating dust pollution in coal mining operations. To investigate water imbibition and adsorption behavior on the coal surface following injection into coal seams, as well as the impact of surfactants, coal particles with sizes of 68 mm, 35 mm, and mm were selected from the Dongtan Coal Mine in Shandong Province, China.
Coal seam water injection is vital in mitigating dust pollution in coal mining operations. To investigate water imbibition and adsorption behavior on the coal surface following injection into coal seams, as well as the impact of surfactants, coal particles with sizes of 68 mm, 35 mm, and mm were selected from the Dongtan Coal Mine in Shandong Province, China.
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.
Fully utilizing the energy generated by the explosion of pulverized coal will contribute to realize the clean and efficient exploitation of coal resources. The pulverized coal explosion characteristics will be a farreaching and important task to explore. In this paper, ten kinds of lowquality coals such as high sulfur, high ash, and low metamorphic degree coals were investigated and the ...
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.
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 ...
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 ...
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 categories (namely a plane fracture and surface fracture), of which there were eight types. Numerical simulations were then conducted on the water injection process in accordance with the actual extraction conditions ...
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.
Formation and Control of Sulfur Oxides. Bruce G. Miller, in Clean Coal Engineering Technology (Second Edition), 2017 Furnace sorbent injection. With the exception of LIMB, furnace sorbent injection (FSI) is the simplest dry sorbent process. In this process, illustrated in Fig., pulverized sorbents, most often calcium hydroxide and sometimes limestone, are injected into the upper part of ...
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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