石灰石造渣炼钢硅挥发现象及其控制工艺探索  

Silicon volatilization and control during slagging by limestone in BOF

作　　者：毛文文 李晨晓[1,2] 鲁华[1,2] 李宏[1,2] MAO Wenwen LI Chenixiao LU Hua LI Hong(State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《炼钢》2017年第1期39-42,共4页Steelmaking

基　　金：国家自然科学基金(51334001)

摘　　要：通过工业试验、热力学计算对氧气转炉采用石灰石造渣炼钢过程中的硅挥发现象进行了研究。发现硅除了以SiO_2形式进入渣中外,还会被氧化为低价的气态SiO进入烟尘。估算得出本次工业试验中硅挥发的比例为6.8%~41.0%。通过热力学分析可知硅挥发率随CaCO_3的加入量呈现先升高后降低的趋势;为提高硅的挥发率,可提高开吹后头批石灰石的加入量。The silicon volatilization phenomenon during slagging by limestone in BOF was studied by industrial experiment and thermodynamic calculation. Experiments indicated that a large portion of silicon in hot metal did not go into slag in the form of SiO2,but was oxidized into compound of low valence states SiO,and went into the furnace dust. In estimation,the volatilization ratio of silicon in this industrial experiment was about 6. 8 %- 41. 0 %. Thermal analysis showed that silicon volatilization ratio increased,then decreased with the increase of the limestone addition. Silicon volatilization ratio would be effectively improved by increasing the amount of the first batch of limestone charged into BOF just after blowing.

关 键 词：BOF 硅挥发 渣量 石灰石造渣 

分 类 号：TF713.3[冶金工程—钢铁冶金]