RH decarburization model based on off-gas analysis

LIN Lu; BAO Yan-ping; YUE Feng; WANG Min; OU Hong-lin

doi:10.13374/j.issn1001-053x.2011.s1.010

Volume 33 Issue S1

Jul. 2021

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LIN Lu, BAO Yan-ping, YUE Feng, WANG Min, OU Hong-lin. RH decarburization model based on off-gas analysis[J]. Chinese Journal of Engineering, 2011, 33(S1): 20-24. doi: 10.13374/j.issn1001-053x.2011.s1.010

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LIN Lu, BAO Yan-ping, YUE Feng, WANG Min, OU Hong-lin. RH decarburization model based on off-gas analysis[J]. Chinese Journal of Engineering, 2011, 33(S1): 20-24. doi: 10.13374/j.issn1001-053x.2011.s1.010

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RH decarburization model based on off-gas analysis

doi: 10.13374/j.issn1001-053x.2011.s1.010

LIN Lu^1,2,
BAO Yan-ping^{1,2
,
,},
YUE Feng³,
WANG Min^1,2,
OU Hong-lin³

1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
3. Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2011-08-20
Available Online: 2021-07-30

Abstract

Abstract

In order to continuously forecast the carbon content in a RH molten bath and control the carbon content at the RH terminal point,the off-gas flow rate was analyzed and the content of CO + CO₂ in the off-gas was monitored continuously. Based on carbon balance calculations,a decarburization mathematical model was established for the 250 t RH in a steel plant. Calculation results from the model showed that the precision of carbon content at the end point of RH treatment was ±5×10^-6 for ultra-low-carbon steel (w[C] ≤ 30×10^-6). When the content of CO + CO₂ in the off gas was lower than 5% in the late period of RH decarburization,the decarburization rate was lower than 10^-6 min^-1,so decarburization could be determined to finish. In combination with site technological conditions,the effects of the pressure drop platform and oxygen blowing operation on the RH decarburization rate were studied.
- steelmaking,
- refining,
- decarburization,
- mathematical models