A process model for BOF process based on bath mixing degree

Guang-hui Li; Bao Wang; Qing Liu; Xin-zhong Tian; Rong Zhu; Li-ning Hu; Guo-guang Cheng

doi:10.1007/s12613-010-0379-4

Volume 17 Issue 6

Dec. 2010

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Abstract

International Journal of Minerals, Metallurgy and Materials > 2010 > 17(6): 715-722. > DOI: 10.1007/s12613-010-0379-4

Guang-hui Li, Bao Wang, Qing Liu, Xin-zhong Tian, Rong Zhu, Li-ning Hu, and Guo-guang Cheng, A process model for BOF process based on bath mixing degree, Int. J. Miner. Metall. Mater., 17(2010), No. 6, pp.715-722. https://dx.doi.org/10.1007/s12613-010-0379-4

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A process model for BOF process based on bath mixing degree

Guang-hui Li¹⁾,
Bao Wang¹⁾,
Qing Liu^1), ,,
Xin-zhong Tian^1,2),
Rong Zhu¹⁾,
Li-ning Hu²⁾ and
Guo-guang Cheng¹⁾

Author Affilications

School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
Research and Development Center, Xingtai Steel Co. Ltd., Xingtai, 054027, China

Funds:

This work was financially supported by the New Century Excellent Talents Program of the Ministry of Education of China (No.NCET 07-0067) and the National Natural Science Foundation of China (No.50874014).

Received: 10 January 2010; Revised: 08 February 2010; Accepted: 20 February 2010; Available Online: 13 June 2021

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Abstract

Abstract

The process model for BOF process can be applied to predict the liquid steel composition and bath temperature during the whole steelmaking process. On the basis of the traditional three-stage decarburization theory, the concept of mixing degree was put forward, which was used to indicate the effect of oxygen jet on decarburization. Furthermore, a more practical process model for BOF steelmaking was developed by analyzing the effect of silicon, manganese, oxygen injection rate, oxygen lance height, and bath temperature on decarburization. Process verification and end-point verification for the process model have been carried out, and the verification results show that the prediction accuracy of carbon content reaches 82.6% (the range of carbon content at the end-point is less than 0.1wt%) and 85.7% (the range of carbon content at end-point is 0.1wt%–0.7wt%) when the absolute error is less than 0.02wt% and 0.05wt%, respectively.
- steelmaking,
- basic oxygen furnace (BOF),
- decarburization,
- modelling,
- prediction

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