底吹搅拌对复吹转炉脱磷工艺的作用分析

 在分析讨论复吹转炉冶炼过程脱磷反应规律、常规转炉冶炼过程脱磷弊端的基础上，探讨了转炉冶炼过程脱磷时机选择与合理控制机制。基于转炉脱磷热力学与动力学条件分析得出，底吹搅拌能兼顾渣-钢界面搅拌和控制脱磷温度，是提高脱磷效率的主要动力学手段。通过水模试验模拟渣-钢之间的传质现象得出，转炉底吹元件数量和底吹强度的不同组合与渣-钢界面间的有效传质存在合适的匹配关系，随着转炉底吹强度增加，底吹元件个数应适当增加。转炉长寿命复吹效果不但取决于合理的供气元件选型、数量、布置及供气模式，更要依靠科学的底吹维护工艺制度。

Effect of bottom blowing on dephosphorization technology in combined blowing converter

Reasonable dephosphorization mechanism and opportunity were proposed through discussion of dephosphori-zation trend and drawbacks of conventional dephosphorization in the current study. On the basis of thermodynamics and dynamic analysis on dephosphorization in BOF,it showed that bottom blowing was the main dynamics means to im-prove dephosphorization efficiency,which could balance the stir of slag-steel interface and dephosphorization tempera-ture control. The study results of slag mass transfer simulation showed that there was a suitable matching relationship be-tween the bottom blowing element number and bottom blowing intensity. With the bottom blowing intensity increased, the number of bottom blowing element should be increased. Long life combined with blowing effects depended not only on rational selection,number,layout of elements and supply patterns,but also on scientific bottom blowing mainte-nance technology.