5, 6 In addition, coal seam water injection can increase the water content of the coal mass, change the nature of the coal mass, and reduce the dust concentration during the mining 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 ...
Coal briquettes. During the production of coal briquettes, coal dust is mixed with starch paste and water before heating and compression into an ovoid shape. The starch provides structural support to the briquette shape and ensures that the structure is maintained during transport of the briquette to the oven on the conveyor belt.
1. Introduction. In the process of coal mining, coalseam water injection can play the role of wetting the coal seam, which is conducive to minimizing the amount of coal dust produced in the mining process (Zhang et al., 2018, Wang et al., 2019a, Wang et al., 2019a, Zhou et al., 2017a).However, most coal mines—particularly deep mines— have the problems of low porosity, poor wettability, etc.
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 ...
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.
Introduction. Coal seam water injection can prewet the coal body, increase the water content [1], [2], reduce dust generation [3], [4], change the physical and chemical properties of coal [5], [6], and promote gas desorption mining [7], [8] to control coal mine disasters such as coal and gas outbursts, rock bursts, and coal dust.
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 ...
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 as the hydrophobic nature of coal dust and a harsh external ...
Coalbed water injection is the most basic and effective dustproof technology in the coal mining face. To understand the influence of coalbed water injection process parameters and coalbed characteristic parameters on coal wetting radius, this paper uses Fluent computational fluid dynamics software to systematically study the seepage process of coalbed water injection under different process ...
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 ...
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.
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...
Surfactant 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 (C12H25OSO3Na), AES (C14H29O5NaS), OP10 (C18H30O10), and JFC (RO(CH2CH2O)nH) to anthracite were compared. In addition, the wetting ...
Coal seam water injection is proved an effective method for preventing coal and gas outburst. However, the poor wettability of coal seam has resulted in poor effect of coal seam water injection in preventing coal and gas outburst. In addition, the coal seam is in a state of injecteduninjected cycle due to multiple water injection. Therefore, it is important to study the wettability of coal ...
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 ...
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.
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 ...
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
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 ...
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 .
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 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 ...
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.
Coal dust injection ON: : Coal dust injection OFF: : Ignition system ON: Explosion suppression system ON: ... the mass loss is %, mainly due to polyphosphate's dehydration process. The low pyrolysis of coal dust in the N 2 atmosphere and the endothermic effect of APP, and thus the thermal decomposition of coal dust was suppressed ...
Relying on a crosslayer extraction borehole, coal seam water injection efficiency extraction and highefficiency water injection dust prevention can be performed in the later stage of borehole extraction, enabling onehole multipurpose and "gaspowder" integrated prevention and control.
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 ...
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 ...
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