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,
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
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. ...
WhatsApp: +86 18203695377
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 injection. However, the research on the effect of surfactant on the seepage process is still ...
WhatsApp: +86 18203695377
During the COREX coal injection process, pulverized coal passes through the tuyere of the melter and gasifier and enters the swirling zone for combustion. Generate hot gas to meet the needs of ...
WhatsApp: +86 18203695377
Pulverized coal (PC) blending with ironbearing dust (IBD) injection technology in blast furnace (BF) ironmaking process was proposed to valorize the IBD.
WhatsApp: +86 18203695377
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).
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
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
WhatsApp: +86 18203695377
When the pulverized coal is injected into the BF through blowpipes and tuyeres, the coal is a source of heat and a reductant, because of the reactions of devolatilization, gasification, and combustion as well as the formation of unburned char.
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
The Permissible Exposure Limit for respiratory coal dust of 2 mg/m3 was enacted by the Mine Safety and Health Administration (MSHA) in 1972 in the US, and this was further reduced to mg/m 3 in August 2016 [11]. However, the available technologies used to control coal dust hardly meet the requirements of the established standards.
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
Coal dust concentration was dramatically increased since the mechanized coal mining technologies widely applied in underground mining, resulting in a health threat to miners due to exposure exceed coal dust. ... such as coal seam water injection and water spray [14], [15]. Coal seam water injection has the advantage of prewetting coal body ...
WhatsApp: +86 18203695377
Coal seam water injection and spray dust reduction are the main measures to prevent and control dust on the mining face, water injection into the coal seam to be mined through boreholes, or fog field generated by highpressure atomization and can moisten the coal (dust), thereby reducing the floating coal produced during the mining process ...
WhatsApp: +86 18203695377
The use of biomass dust as a fuel in reciprocating 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 water leaching), and have a large volatile ...
WhatsApp: +86 18203695377
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
Copyright © 2023 GMC Co., Ltd. SiteMap
