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| Theoretical and thermal simulation of titanium removal in combined blown converter |
| WU Wei，NI Bing，LIU Zhuang-zhuang，YANG Yong |
| Metallurgical Department， Central Iron and Steel Research Institute， Beijing 100081， China |
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Abstract The titanium removal in BOF converter process was simulated by experiment in 500 kg intermediate frequency induction furnace with top and bottom blowing function， and the reaction mechanism of titanium oxidation was investigated. The results showed that the average end point mass percent of Ti in hot metal was 0.008 2% and the rate of titanium removal was 71.3%. In summary， Ti removal rate is decreased with the increase of hot metal temperature， but increased with the increase of the of oxygen supply to the molten pool. There is a balance relationship between the end point Ti content and the end point Si content in hot metal as well as Ti and Mn. However， the end point Ti content is not associated with carbon oxidation. Ti distribution ratio between slag and hot metal ranges from 0.6 to 1.6， and it is increased with the increase of (FeO) content in slag， but decreased with the increase of hot metal temperature. The experimental result is consistent with the theoretical analysis which indicates that the reaction of titanium oxidation is more conducive to occur at lower temperature.
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Received: 28 March 2014
Published: 02 February 2015
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2015, Vol. 50 
