Impact characteristics of submerged gas–solid injection in the manufacturing process of steel

WEI Guang-sheng; ZHU Rong; TIAN Bo-han; DONG Kai; YANG Ling-zhi

doi:10.13374/j.issn2095-9389.2020.04.05.s03

Volume 42 Issue S

Dec. 2020

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WEI Guang-sheng, ZHU Rong, TIAN Bo-han, DONG Kai, YANG Ling-zhi. Impact characteristics of submerged gas–solid injection in the manufacturing process of steel[J]. Chinese Journal of Engineering, 2020, 42(S): 47-53. doi: 10.13374/j.issn2095-9389.2020.04.05.s03

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WEI Guang-sheng, ZHU Rong, TIAN Bo-han, DONG Kai, YANG Ling-zhi. Impact characteristics of submerged gas–solid injection in the manufacturing process of steel[J]. Chinese Journal of Engineering, 2020, 42(S): 47-53. doi: 10.13374/j.issn2095-9389.2020.04.05.s03

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Impact characteristics of submerged gas–solid injection in the manufacturing process of steel

doi: 10.13374/j.issn2095-9389.2020.04.05.s03

WEI Guang-sheng^{1, 2},
ZHU Rong^{1, 2},
TIAN Bo-han^{1, 2},
DONG Kai^{1, 2},
YANG Ling-zhi^{3
,
,}

1.
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2.
Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, Beijing 100083, China
3.
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

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Corresponding author: E-mail: yanglingzhi@163.com
Received Date: 2020-04-05
Publish Date: 2020-12-25

Abstract

Abstract

Scrap is used as a basic raw material in an electric arc furnace (EAF) steelmaking process. During the process of melting, the phosphorus content fluctuates greatly, which is affected by various parameters such as the furnace structure and poor reaction dynamic conditions. Moreover, dephosphorization is very difficult to achieve. It is known that the carbon content of all melting scraps is low, C–O reaction in the molten pool is not sufficient, and number of bubbles is small; the FeO content in slag is high and molten steel is very easily oxidized by blowing oxygen and effective stirring. This study proposed a new process of submerged gas–solid injection and implemented it in EAF steelmaking, which effectively solved the aforementioned problems by delivering lime powder or carbon powder directly into the molten pool. In this study, the impact characteristics of submerged gas–solid injection in molten bath were investigated using numerical simulations and water model experiments. It is observed that when the gas flow rate was increased, the horizontal and vertical penetration distances were also increased. Meanwhile, when the installed angle of the nozzle was increased, the horizontal penetration distance was also increased, whereas, there was a decrease in vertical penetration distance. Further, the results obtained also show that both the kinetic energy of gas jet and impact penetration depth are increased by the proposed powder injection process.
- EAF steelmaking,
- submerged gas–solid injection,
- impact characteristics,
- numerical simulation,
- water model experiment

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References(24)

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