A process model for BOF process based on bath mixing degree |
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Authors: | Guang-hui Li Bao Wang Qing Liu Xin-zhong Tian Rong Zhu Li-ning Hu Guo-guang Cheng |
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Institution: | (1) Research Group Control Systems Engineering, Hogeschool Arnhem-Nijmegen, Karveel 67, 7429 BK Colmschate, The Netherlands;(2) Hogeschool Arnhem-Nijmegen, University of Twente, Twente, The Netherlands |
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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. |
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Keywords: | |
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