基于數據統計和廢氣分析的RH快速脫碳工藝

郭建龍; 包燕平; 王敏; 李應江

doi:10.13374/j.issn2095-9389.2018.s1.020

基于數據統計和廢氣分析的RH快速脫碳工藝

doi: 10.13374/j.issn2095-9389.2018.s1.020

1. 北京科技大學鋼鐵冶金新技術國家重點實驗室;
2. 馬鋼集團第四鋼軋總廠

詳細信息

通訊作者:
包燕平, E-mail:baoyp@ustb.edu.cn

中圖分類號: X757
計量
- 文章訪問數: 9
- HTML全文瀏覽量: 2
- PDF下載量: 0
- 被引次數: 0
出版歷程
- 收稿日期: 2018-02-15
- 網絡出版日期: 2023-07-18

RH rapid decarbonization process based on data statistics and off-gas analysis

1. State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing;
2. Fourth Steel Rolling Plant,Masteel Group

摘要

摘要: RH精煉過程中合理的工藝參數對提高RH過程脫碳速率、縮短RH精煉時間起著至關重要的作用.針對某鋼廠在IF鋼生產中, 300 t RH脫碳時間較長的問題, 采用SPSS統計學軟件對RH精煉過程中的關鍵工藝參數相關性進行統計分析, 研究RH關鍵工藝參數和脫碳時間之間的相關性, 并在大量工藝數據統計和廢氣分析的基礎上, 分析RH關鍵工藝參數與脫碳時間的影響關系和調控規律, 并由此提出工藝改進措施.結果表明:生產過程中應盡早達到極限真空度, 并避免壓降平臺的產生;碳粉加入量不超過35 kg, 碳粉加入次數不超過2次, 并且在達到極限真空壓力之前盡早加入碳粉;在CO峰值之前進行吹氧, 并將開始吹氧時間控制在2.5³.5 min范圍時, RH脫碳時間明顯縮短.通過現場工藝驗證, 工藝參數優化后平均脫碳時間由21.4 min降低到18.3 min, 降幅達14.5%.
- RH精煉參數 /
- 脫碳時間 /
- 數據統計 /
- 廢氣分析
Abstract: Reasonable process parameters in the RH refining process are very important to improve the decarburization rate and shorten the refining time.In view of the problem of long decarburization time of 300-t RH in the IF steel production, SPSS statistical software was used to analyze the correlation relationship between the process parameters of the RH refining process and the decarburization time.Based on large numbers of refining process date statistics and off-gas analysis, the relationship between the process parameters and decarburization time was obtained and the improvement measures were put forward.The results show that the limit vacuum should be reached as early as possible and pressure drop platform should be avoided in the refining process;the addition amount of carbon powder should be no more than 35 kg, the join number should be no more than 2 times and the carbon powder should be added as soon as possible before reaching the ultimate vacuum pressure;oxygen blowing should be controlled before the peak value of CO, and the start time of oxygen blowing should be controlled in the range of 2.5-3.5 min.Through industry technology verification, the average decarburization time is reduced from 21.4 to 18.3 min after the optimization of process parameters, decreasing amplitude reaches14.5%.
- RH refining parameters /
- decarburization time /
- date statistics /
- off-gas analysis

HTML全文

參考文獻(16)

[1]	Yue F, Cui H, Li P H, et al. Study on the optimum process of refining ULC steel by RH degasser. J Univ Sci Technol Beijing, 2009, 31 (Suppl 1) :53 (岳峰, 崔衡, 李朋歡, 等. RH冶煉超低碳鋼的最優工藝研究.北京科技大學學報, 2009, 31 (增刊1) :53)
[2]	Zhu M Y, Sha J, Huang Z Z. Numerical simulation of molten steel flow in a RH degasser. Acta Metall Sin, 2000, 36 (11) :1175 (朱苗勇, 沙駿, 黃宗澤. RH真空精煉裝置內鋼液流動行為的數值模擬.金屬學報, 2000, 36 (11) :1175)
[3]	Zhao X Y, Zhang J M, Luo Y Z, et al. Mathematical model of decarburization processes in RH refining for ultra-low carbon steel. J Univ Sci Technol Beijing, 2012, 34 (8) :876 (趙新宇, 張炯明, 羅衍昭, 等.超低碳鋼RH冶煉脫碳過程的數學模型.北京科技大學學報, 2012, 34 (8) :876)
[4]	Li C W, Cheng G G, Wang X H, et al. Internal decarburization mechanism and control technology of RH treatment for ultra-low carbon steel. J Univ Sci Technol Beijing, 2011, 33 (3) :276 (李崇巍, 成國光, 王新華, 等. RH冶煉超低碳鋼內部脫碳機理及控制工藝.北京科技大學學報, 2011, 33 (3) :276)
[5]	Cui H, Chen B, Wang M, et al. Cleanliness control of IF steel during the RH refining process. J Univ Sci Technol Beijing, 2011, 33 (Suppl 1) :147 (崔衡, 陳斌, 王敏, 等. RH精煉過程中IF鋼潔凈度控制.北京科技大學學報, 2011, 33 (增刊1) :147)
[6]	Kato Y, Kirihara T, Fujii T. Analysis of decarburization reaction in RH degasser and its application to ultra-low carbon steel production. Kawasaki Steel Tech Rep, 1995 (32) :25
[7]	Fukuda Y, Onoyama S, Imai T, et al. Development of high-grade steel manufacturing technology on mass-production at Nagoya works. Nipp Steel Tech Rep, 2013 (104) :90
[8]	Li C W, Cheng G G, Wang X H, et al. Effect of RH blowing oxygen operation on decarburization rate of treatment for ultra-low carbon steel. Iron Steel, 2012, 47 (3) :25 (李崇巍, 成國光, 王新華, 等. RH吹氧操作對超低碳鋼脫碳速率的影響.鋼鐵, 2012, 47 (3) :25)
[9]	Lin L, Bao Y P, Yue F, et al. RH decarburization model based on off-gas analysis. J Univ Sci Technol Beijing, 2011, 33 (Suppl1) :20 (林路, 包燕平, 岳峰, 等.基于廢氣分析的RH脫碳模型.北京科技大學學報, 2011, 33 (增刊1) :20)
[10]	Cui J, Huang Z Z, Ma Z G. Development of RH vacuum refining process in Baosteel//Proceedings of the Second China German (EU) Metallurgical Technology Meeting. Dusseldorf, 2007:88 (崔健, 黃宗澤, 馬志剛.寶鋼RH真空精煉工藝的發展//第二屆中德 (歐) 冶金技術研討會論文集.杜塞爾多夫, 2007:88)
[11]	Doo W C, Kim D Y, Kang S C, et al. The morphology of Al-Ti--O complex oxide inclusions formed in an ultra low-carbon steel melt during the RH process. Met Mater Int, 2007, 13 (3) :249
[12]	Yamaguchi K, Kishimoto Y, Sakuraya T, et al. Effect of refining conditions for ultra low carbon steel on decarburization reaction in RH degasser. ISIJ Int, 1992, 32 (1) :126
[13]	Takechi H. Metallurgical aspects on interstitial free sheet steel from industrial viewpoints. ISIJ Int, 1994, 34 (1) :1
[14]	Li Y H. Study on Fast Decarburization of Ruhrstahl-Hereaeus and Hydrodynamics in an External Loop Airlift Reactor[Dissertation]. Beijing:University of Science and Technology Beijing, 2014 (李怡宏. RH快速脫碳技術及環流反應器內流體行為研究[學位論文].北京:北京科技大學, 2014)
[15]	Higuchi Y, Ikenaga H, Shirota Y. Effects of[C], [O] and pressure on RH vacuum decarburization. Tetsu-to-Hagané, 1998, 84 (10) :709
[16]	Kishimoto Y, Yamaguchi K, Sakuraya T, et al. Decarburization reaction in ultra-low carbon iron melt under reduced pressure.ISIJ Int, 1993, 33 (3) :391