模拟复吹转炉脱钛预处理的理论和试验  被引量:4

Theoretical and thermal simulation of titanium removal in combined blown converter

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作  者:吴巍[1] 倪冰[1] 刘壮壮[1] 杨勇[1] 

机构地区:[1]钢铁研究总院冶金工艺研究所,北京100081

出  处:《钢铁》2015年第2期22-26,共5页Iron and Steel

摘  要:采用具备顶底复吹功能的500 kg感应炉模拟了转炉预脱钛工艺,分析了钛的氧化反应机理。试验结果表明:终点铁水钛质量分数平均为0.008 2%,脱钛率平均为71.3%。脱钛率随铁水温度升高而降低,随熔池供氧量增加而增加。铁水的终点钛质量分数与终点硅、锰质量分数存在平衡关系,与过程中碳的氧化没有相关性。渣铁间钛分配比为0.6-1.6,随渣中氧化亚铁质量分数的提高而提高,随铁水温度的升高而降低。试验结果和低温下有利于脱钛的理论分析一致。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.

关 键 词:铁水预处理 脱钛 顶底复吹 转炉 热模拟 

分 类 号:TF713[冶金工程—钢铁冶金]

 

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