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
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.
杨荣光, 闫占辉, 高宠光, 石树东, 王国连, 刘金刚. VD炉氧脱碳工艺生产实践[J]. 钢铁, 2021, 56(4): 39-43.
YANG Rong-guang, YAN Zhan-hui, GAO Chong-guang, SHI Shu-dong, WANG Guo-lian, LIU Jin-gang. Practice of VD furnace oxygen decarburization process[J]. Iron and Steel, 2021, 56(4): 39-43.
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2021, Vol. 56 
