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| Practice of VD furnace oxygen decarburization process |
| YANG Rong-guang1, YAN Zhan-hui1, GAO Chong-guang1, SHI Shu-dong1, WANG Guo-lian1, LIU Jin-gang2 |
1. Steel Rolling Department, Shougang Jingtang United Iron and Steel Co., Ltd., Tangshan 063200, Hebei, China;
2. Technology Center, Shougang Jingtang United Iron and Steel Co., Ltd., Tangshan 063200, Hebei, China |
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Abstract To research and develop MCCR low carbon steel,in the process of "KR→converter→VD furnace→LF furnace", the decarburization process using oxygen in VD furnace was developed to produce ultra-low carbon steel (w([C])<0.02%). w([C])was less than 0.06% and the average decarburization rate was 33% during the tapping of boiling steel from the combined blown converter. The vacuum treatment was used in VD furnace. The high vacuum was maintained and the vacuum degree is less than 67 Pa.The decarburization rate reached 65%. The average w([C]) was 0.006 7%, and the lowest w([C]) was 0.002 3%. In LF furnace controlled carbonization and deep desulfurization were employed, which can completely meet the production demand of MCCR ultra-low carbon and sulfur steel.
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Received: 30 July 2020
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[1] 杨海林,周前,韩铁水. VD 真空氧脱碳工艺[J].炼钢,2005(5):18. (YANG Hai-lin, ZHOU Qian, HAN Tie-shui.Technology of vacuum oxygen decarburization in VD[J]. Steelmaking, 2005(5):18.)
[2] 韩铁水,李红文.舞钢VD工艺研究[J].河南冶金,2004(1):40.(HAN Tie-shui LI Hong-wen. The VD process research of WUYANG Steel Co[J]. Henan Metallurgy, 2004(1):40.)
[3] 北村信也.Decarburization model for vacuum degasser[J].铁と钢,1994(3):31.
[4] 刘川汉.RH与VD/VOD 二次精炼法的比较[J].特殊钢,2000(4):26.(LIU Chuan-han. Comparison between secondary refining process RH and VD/VOD[J].Special Steel, 2000(4):26.)
[5] Tomas K, Stanley S, Manh K T. Equipment and practice enhancements at dofasco vacuum degas tank for ULC steel[J].Iron and Steel Techmology,2004(4):21.
[6] 刘晓峰,安昌遐,杜亚伟,等.VD真空精炼技术与装备的发展现状[J].中国冶金,2013,23(5):7.(LIU Xiao-feng,AN Chang-xia,DU Ya-wei,et al.Development actuality of the vacuum degassing technology and its equipmentand[J]. China Metallurgy, 2013,23(5):7.)
[7] 顾文兵,黄宗泽,尹小东.VD精炼脱碳过程的工艺因素分析[J].钢铁研究学报,2006,18(8):19.(GU Wen-bing,HUANG Zong-ze,YIN Xiao-dong. Analysis of process factors affecting decarburization in vacuum degasser[J].Journal of Iron and Steel Research,2006,18(8):19.)
[8] 黄希祜.钢铁冶金原理 [M].3版.北京:冶金工业出版社,2004.(HUANG Xi-hu. Principles of Iron and Steel Metallurgy [M]. 3rd ed.Beijing: Metallurgical Industry Press,2004.)
[9] 赵沛.炉外精炼及铁水预处理使用技术手册[M].北京:冶金工业出版社,2002.(ZHAO Pei. Technical Manual for Secondary Refining and Hot Metal Pretreatment[M]. Beijing: Metallurgical Industry Press,2002.)
[10] 星島洋介,島宏,福田和久,等.RH多機能バーナー設備の實機化[J].Camp ISIJ,1994,7(1):241.
[11] Toshihiro Kitamur.Mathematical reaction model tor nitrogen in vacuum degasser desorption and decarburization[J].ISIJ International,1996,36(4): 395.
[12] 尹小东,黄宗泽,顾文兵.真空脱碳过程的数学模拟研究[J].金属学报,2005,41(8):876.(YIN Xiao-dong, HUANG Zong-ze,GU Wen-bing. Mathematical simulation of decarburization process in vacuum degasser[J]. Acta Metallurgica Sinica, 2005, 41(8):876.)
[13] 耿佃桥,雷洪,赫冀成,等.不同底吹位置对 VD 精炼脱碳过程的影响[J].钢铁,2010,45(1):28.(GENG Dian-qiao, LEI Hong, HE Ji-cheng, et al. Efect of different bottom blowing locations on decarburization process in vacuum degasser[J].Iron and Steel, 2010,45(1):28.)
[14] 尹小东,黄宗泽,顾文兵.VD 生产低碳/超低碳钢的现状及在宝钢的开发前景[J].宝钢技术,2005(1):35.(YIN Xiao-dong, HUANG Zong-ze,GU Wen-bing. Production status development prospect of LC/ULC steel with vacuum degasser(VD) technology at Baosteel[J].Baosteel Technology, 2005(1):35.)
[15] 杨荣光,胡显堂,杨振旺,等.首钢京唐VD炉工艺设计特点[J].中国冶金,2019,29(10):89.(YANG Rong-guang, HU Xian-tang, YANG Zhen-wang, et al. Technical design characteristics of VD furnace in Shougang Jingtang[J].China Metallurgy, 2019,29(10):89.) |
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2021, Vol. 56 
