采用数值模拟方法研究了VD精炼过程中不同底吹位置对钢液流场及脱碳过程的影响.研究结果表明:双底吹脱碳效果最好,偏心底吹次之,中心底吹最差;在偏心底吹下,当底吹位置距钢包中心0.4R～0.5R时脱碳效果最好,终点碳的质量分数最低为39×10~(-5);在双底吹条件下,当底吹位置距钢包中心0.50R～0.65R时脱碳效果最好,终点碳的质量分数最低为25×10~(-6);与偏心底吹相比,采用双底吹时终点碳的质量分数可降低18%～45%.
The numerical simulation method was employed to study the effect of different bottom blowing locations on fluid flow and decarburization process in vacuum degasser. The numerical results show that the double bottom blowing is the most effective method for deearbonization, the eccentric bottom blowing has a minor effect, and the centric bottom blowing is the poorest method. For the eccentric bottom blowing, the decarbonization efficiency is the highest and the terminal carbon concentration Jails down to 39×10~(-6) when the eccentric distance of bottom blo-wing location is between 0.4R and 0.5R. For double bottom blowing, the decarbonization efficiency is the highest and the terminal carbon concentration fails clown to 25 ×10~(-6) when the eccentric distance of bottom blowing location is between 0.50R and 0. 65R. Furthermore, the terminal carbon concentration on the condition of double bottom blowing is 18 %-450% lower than that on the condition of eccentric bottom blowing.
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