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| Effect of Trace Elements in Hot Metal on Steelmaking Process |
| WANG Lin-song1,YANG Mao-lin2,ZHENG Jia-liang3,GAO Chang-yi2,REN Zheng-de4 |
1. Shuicheng Iron and Steel Group Corp., Liupanshui 553028, Guizhou, China
2. Technology Center of Shuicheng Iron and Steel Group Corp., Liupanshui 553028, Guizhou, China
3. Steelmaking Plant of Shuicheng Iron and Steel Group Corp., Liupanshui 553028, Guizhou, China
4. Metallurgy and Material Engineering Department, Chongqing Institute of Science and Technology, Chongqing 401331, China |
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Abstract V-Ti-tracing-elements hot metal, which was different from common hot metal and high V-Ti hot metal, was produced using low proportion iron ore involving V-Ti element. In order to know the effect of these trace elements on converter steelmaking process, the phase compositions and melting characters of V-Ti slag were analyzed and the steelmaking process in converter was simulated by high frequency induction furnace. The results show that: 1) carbon flame temperature of general hot metal is 1370-1400℃, carbon flame temperature of Shuigang hot metal is 1400-1430℃ which is 30℃ higher than that of general hot metal; 2) at a small rate of blowing oxygen, Ti,Si,Mn and C in melt can be oxidized one by one; 3) foaming and foam storage capacity of TiO2-bearing slag is larger than that of slag without TiO2, active CO bubbles in slag exacerbate slag foaming; 4) in prior and mid period of converter steelmaking, super high FeO content, relatively low alkalinity and C-FeO reaction in slag and foam storage capacity of TiO2-bearing slag are main reasons for the slopping.
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Received: 29 December 2011
Published: 05 September 2012
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2012, Vol. 47 
