柳钢4号高炉钛矿护炉效果及影响钛分配比的因素

Effect of Furnace Protection with Titanium Ore and Factor Influencing Titanium Distribution Ratio in Liuzhou Steel's No.4 BF

结合柳钢4号高炉钛矿护炉实践,重点对炉缸侧壁温度上升的原因、钛矿护炉的效果,以及影响钛分配比的因素进行了分析。4号高炉炉缸侧壁温度上升的主要原因为炭砖侵蚀、原燃料质量波动,尤其是焦炭质量,以及炉内钛残留量减少等。采取钛矿护炉操作后,侧壁温度明显降低,温度上升势头得到有效控制。高炉钛分配比受渣铁成分和温度的影响较为明显,适当提高炉渣碱度和铁水温度、增大铁水硅含量及降低硫含量等有利于钛分配比的提高。

The reasons causing abnormal temperature rise of hearth side wall, the effect of furnace protection with titanium ore, and the factors influencing titanium distribution ratio based on furnace protection practice in Liuzhou Steel＇s No. 4 BF were analyzed. Abnormal temperature rise of hearth side wall is mainly resulted from erosion of carbon bricks, fluctuation of raw material and fuel quality （especially the quality of the coke）, and the reduction of residual titanium in the furnace. After adopting the measure of furnace protection with titanium ore, the hearth side wall temperature drops down significantly and abnormal temperature rise gets controlled effectively. The titanium distribution ratio in BF is dominated by the composition and temperature of slag, thus appropriate increase of slag basicity, hot metal temperature and silicon content in hot metal is beneficial to the improvement of the titanium distribution ratio.