基于廢氣分析的RH脫碳模型

林路; 包燕平; 岳峰; 王敏; 歐洪林

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

基于廢氣分析的RH脫碳模型

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

林路^1,2,
包燕平^1,2, ,,
岳峰³,
王敏^1,2,
歐洪林³

1. 北京科技大學鋼鐵冶金新技術國家重點實驗室, 北京 100083;
2. 北京科技大學冶金與生態工程學院, 北京 100083;
3. 北京科技大學冶金工程研究院, 北京 100083

詳細信息

通訊作者:
包燕平,E-mail:baoyp@ustb.edu.cn

中圖分類號: TF769.4
計量
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- 被引次數: 0
出版歷程
- 收稿日期: 2011-08-20
- 網絡出版日期: 2021-07-30

RH decarburization model based on off-gas analysis

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

摘要

摘要: 為連續預測RH熔池內碳含量,實現對RH脫碳終點碳含量控制,以物質C平衡為基礎,通過對某鋼廠250 t RH廢氣分析系統分析的廢氣流量以及廢氣中CO、CO₂含量進行連續監控,建立了基于廢氣分析的RH脫碳數學模型.該模型計算表明:對于冶煉成品中碳質量分數≤ 30×10^-6的超低碳鋼,模型計算RH脫碳終點碳質量分數誤差都在±5×10^-6之間;在RH脫碳后期,廢氣中CO+CO₂質量分數低于5%時,熔池內脫碳速率低于10^-6 min^-1,此時可判定脫碳結束.同時結合現場工藝條件分析了壓降平臺以及吹氧操作對RH脫碳速率的影響.
- 煉鋼 /
- 精煉 /
- 脫碳 /
- 數學模型
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