Development and application of electric arc furnace combined blowing technology

Ma, Guoping; Zhu, Rupeng; Dong, Kai; Li, Z.; Liu, R.; Yang, Lingzhi; Wei, Guangsheng

doi:10.1080/03019233.2016.1144547

Cited by 25 publications

(12 citation statements)

References 2 publications

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“…It is not possible to compare because the combinations are different; however, the magnitude reported by Caffery et al [ 85 ] is quite high, about 14–15 cm s −1 using oxygen injection and bottom gas stirring. For a similar arrangement, Ma et al [ 46 ] reported an average velocity of 2.6 cm s −1 . These results suggest the need of further research to clarify the individual contribution of each stirring mechanism and a comparison with the high‐stirring intensities in the BOF.…”

Section: Bottom Gas Stirring In the Eafmentioning

confidence: 95%

“…In the direct system, the porous plug is in contact with liquid steel, stirring intensity is higher, gas consumption is lower, the plume is narrow and forms a slag eye, the stirring conditions are carefully controlled, and porous plugs have a short life span requiring more maintenance. Ma et al [ 46 ] reported a life span of 700 heats for a direct system. A disadvantage of the direct system is the shallow bath of the EAF.…”

Section: Bottom Gas Stirring In the Eafmentioning

confidence: 99%

“…Ma et al [ 46 ] reported a numerical model comparing a conventional EAF equipped only with supersonic lances and the case equipped with coherent jets as well as BGI, called combined blowing. The bottom gas flow rate was 20 Nl min −1 .…”

Section: Bottom Gas Stirring In the Eafmentioning

confidence: 99%

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Section: Bottom Gas Stirring In the Eafmentioning

confidence: 95%

Section: Bottom Gas Stirring In the Eafmentioning

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“…EAF bottom-blowing process [5] is blowing inert gas (Ar, N2) from the bottom of EAF. By inert gas mixing of molten steel in the furnace, increasing the electric arc furnace in steel liquefied learn composition and temperature of molten pool even.…”

Section: Introductionmentioning

confidence: 99%

“…Dong [17] considered that bottom-blowing could play an important role in energy saving and consumption reduces through its application in a consteel EAF. Ma [5] considered that the industrial application of the combined blowing technology in a number of steel plants indicates that the combined blowing technology of EAF can effectively improve the pool stirring strength and reaction dynamics condition of the molten pool, and optimise production.…”

Section: Introductionmentioning

confidence: 99%

Research on the Molten Bath of EBT Area with Bottom-Blowing in EAF Steelmaking Process

Yang¹,

Jiang²,

Li³

et al. 2017

Preprint

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Bottom-blowing, as widely adopted in electric arc furnace (EAF) steelmaking technology, stir the molten bath by blowing inert gas (Ar, N2) from the bottom of EAF to promote fluid flow and uneven metallurgical reaction in the molten bath. However, for eccentric structure design of electric arc furnace, the problem still exists in EBT(Eccentric Bottom Tapping)area. In this study, by the analysis of previous research of molten bath at different bottom-blowing gas flow rates, it is found that the dead zone mainly appears in the region of the EBT area. So the ways that increase bottom-blowing flow in the EBT area to reduce the dead zone area have been proposed. A computational fluid dynamics model was established to investigate the effects of bottom-blowing gas flow rate in EBT area on the fluid flow characteristics in the EAF molten bath. Increasing bottom-blowing flow in the EBT area can more effectively improve molten steel flow and reduce the dead zone area. Based on industrial application research, the dynamic conditions of steelmaking process is improved with bottom-blowing by increasing flow in EBT area, the lime consumption, steel consumption and tap-to-tap time are reduced, the contents of FeO and endpoint carbon-oxygen equilibrium is reduced, and the yield of Si, Mn and Al is increased before the refining process.

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Prospects for green steelmaking technology with low carbon emissions in China

Fucheng,

Lukuo,

Ying

2024

Carbon Energy

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The steel industry is a major source of CO2 emissions, and thus, the mitigation of carbon emissions is the most pressing challenge in this sector. In this paper, international environmental governance in the steel industry is reviewed, and the current state of development of low‐carbon technologies is discussed. Additionally, low‐carbon pathways for the steel industry at the current time are proposed, emphasizing prevention and treatment strategies. Furthermore, the prospects of low‐carbon technologies are explored from the perspective of transitioning the energy structure to a “carbon–electricity–hydrogen” relationship. Overall, steel enterprises should adopt hydrogen‐rich metallurgical technologies that are compatible with current needs and process flows in the short term, based on the carbon substitution with hydrogen (prevention) and the CCU (CO2 capture and utilization) concepts (treatment). Additionally, the capture and utilization of CO2 for steelmaking, which can assist in achieving short‐term emission reduction targets but is not a long‐term solution, is discussed. In conclusion, in the long term, the carbon metallurgical process should be gradually supplanted by a hydrogen–electric synergistic approach, thus transforming the energy structure of existing steelmaking processes and attaining near‐zero carbon emission steelmaking technology.

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Development and application of electric arc furnace combined blowing technology

Cited by 25 publications

References 2 publications

Electric Arc Furnace Stirring: A Review

Electric Arc Furnace Stirring: A Review

Research on the Molten Bath of EBT Area with Bottom-Blowing in EAF Steelmaking Process

Prospects for green steelmaking technology with low carbon emissions in China

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