青钢KR法脱硫流场和颗粒分布影响的数值模拟

Numerical Simulation of Effects of Impeller Immersion Depth and Diameter on Flow Fields and Particle Dispersion in KR Stirring Desulfurization in Qingdao Steel

使用Fluent软件对青钢KR搅拌脱硫进行数值模拟,分析搅拌头插入深度和直径对铁水罐内流场和颗粒分布的影响。结果表明,插入深度不宜过浅和过深,否则影响到流场的整体速度分布和颗粒的均匀分布,以750~900 mm较为适宜。搅拌头直径过小,流场速度低,颗粒不能分散或者不能完全分散,过大混合效果提升有限,也会使颗粒分散不均匀,增加耐火材料和动力消耗,顶部直径保持在1 180~1 280 mm比较合适。

Based on Fluent software, numerical simulation on desulfurization with KR stirring was carried out to analyze the effect of impeller immersion depth and diameter on flow field and particle dispersion. The results showed that the immersion of the impeller should be not too deep nor too shallow, otherwise it will have a bad influence on the global velocity of the flow and particle dispersion. It is suitable to maintain the immersion depth at 750-900 ram. An excessively small diameter of the impeller will make low-velocity flow or incomplete particle dispersion. An excessively big diameter of the impeller will make a limited improvement of mixing, uneven particle dispersion, and increasing consumption of refractory and power. It is suitable for the impeller to keep the top diameter at 1 180-1 280