300 t脱磷炉渣-钢界面搅拌与传质效果模拟

 为达到良好的高效复吹效果，改善熔池搅拌情况，采用双指标（混匀时间和传质速率）研究了底吹布置方式对转炉吹炼过程中渣-钢界面搅拌与传质效果的影响。试验研究结果表明，最优布置方案为内8孔布置，此时渣-钢界面传质速率最大，混匀时间最小。大部分底吹布置的混匀时间与传质速率存在反比关系。从整体来看，内圈孔数越多，渣-钢界面传质速率越大，混匀时间越小。对于2-6分布，将底吹元件分布的内圈与外圈合并一起看，底吹元件分布得越均匀，则此布置的搅拌与传质效果越好。

Simulate on agitating and mass transfer effect of 300 t dephosphorization slag-steel interface

In order to achieve efficient combined-blowing effect and improve the result of molten pool stiring,the influ-ence of bottom blowing configuration on the agitating and mass transfer effects of slag-steel interface during the blowing process of BOF was studied by two indexes(mixing time and mass transfer rate). The experimental results show that the optimal layout scheme is with eight inner holes,and at that moment,the mass transfer rate of slag-steel interface is the largest while the mixing time is the shortest. The mixing time of most bottom-blowing arrangements is inversely related to mass transfer rate. Overall,the more the number of holes in the inner ring are,the larger the mass transfer rate is at the slag-steel interface,while the shorter the mixing time is. For the 2-6 distribution,with uniform distribution of the bottom blowing element,the mixing and mass transfer effect of the arrangement is better,when the inner ring of the bot-tom blowing element is merged together with the outer ring.