300t双联复吹脱磷炉的物理模拟分析

Physical simulation analysis of a 300 t duplex combined blown dephosphorization converter

进行了300t脱磷转炉水模型实验，研究了8支底吹元件下不同底吹布置方式、底吹流量大小、顶吹参数、废钢加入比及不同废钢单重对熔池混合效果的影响。研究得出，当底吹元件集中对称布置在炉底0．42D圆周上，底吹供气强度达到2．94m^3／h，氧枪的枪位控制在58～88mm之间时，熔池的混匀效果较好。通过熔池废钢加入的研究得出，当废钢比增加到lo％时，熔池混匀时间值变化非常显著，不同单重废钢对熔池的混匀规律影响相似，在顶吹流量为30000m^3／h时，对于1．5t废钢单重，达到悬浮重量须满足底吹流量不小于4010m^3／h，研究结果可为实际操作工艺参数的优化提供参考依据。

Taking water-model experiments of a 300 t dephosphorization converter, when under eight bottom blo- wing element, different bottom blowing arrangement, the size of the bottom blowing flow rate and top blowing pa- rameters on the influence of the molten pool mixing effect was studied. From the research, when the bottom blo- wing elements concentrated and symmetrically arranged in the furnace bottom of 0.42D on the circumference of a circle, the bottom blowing flow rate is 2.94m^3/h, the lance height is 58 -- 88mm, the blending effect of the mol- ten pool is best. When the scrap ratio reaches to 10%, the mixing time increases greatly, and different single scrap has similar influence on mixing time. For a 1.5 t scrap, the bottom blowing flow rate must reach to 4 010 m^3/h, the scrap can meet the suspension energy, when the top blowing flow rate is 30 000 m^3/h. The research re- sults can provide reference for optimization of practical operation parameters.