Journal of Northeastern University(Natural Science)

Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (8): 1160-1163.DOI: 10.12068/j.issn.1005-3026.2014.08.022

• Materials & Metallurgy • Previous Articles     Next Articles

Control Model of Effective Ti Content for Hearth Protection by TitaniumBearing Material

JIAO Kexin1,2， ZHANG Jianliang1,2， ZUO Haibin1,2， LIU Zhengjian1,2   

  1. 1 School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China； 2 State Key Laboratory of Advanced Metallurgy， University of Science and Technology Beijing， Beijing 100083， China.
  • Received:2013-08-02 Revised:2013-08-02 Online:2014-08-15 Published:2014-04-11
  • Contact: ZUO Haibin
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Abstract: The titaniumbearing material reduction behavior and the protection mechanism for a hearth were analyzed， based on which， the control model of the effective Ti content was established. The effective TiO2 content， critical Ti content with which TiC precipitated and the corresponding precipitation temperature could be calculated by the model according to the realtime parameters of the BF in the actual production in order to guide the production practice. Given the production parameters， the calculated results showed that the effective TiO2 content should be 08 wt%-10 wt%， and the Ti content in molten iron， in which the hearth could be effectively protected， should be 011 wt%-014 wt%. Furthermore， the influence of hot metal ingredients on the precipitation of TiC was analyzed.

Key words: blast furnace, hearth protection, TiO2 activity, Ti(C, N), effective Ti content, control model

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