含钛物料中护炉有效钛含量的控制模型

研究了含钛炉料在高炉炉缸内的还原行为及其对炉缸的保护机制，在此基础上建立了渣铁中有效钛含量的控制模型.根据高炉的实际生产参数实时计算炉渣中的有效TiO2含量、铁水中TiC析出的临界Ti含量及对应的析出温度，从而指导生产实践，为护炉过程参数的选取提供理论依据.在文中给定的生产参数条件下，计算出炉渣中有效TiO2含量(质量分数)应控制在08%~10%，能达到护炉效果的铁水中Ti含量(质量分数)应控制在011%~014%，并分析了铁水成分对TiC析出的影响.

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

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.