喷嘴结构对铁水脱硫气泡微细化的影响

摘要

针对铁水预处理镁蒸气脱硫的气泡微细化问题,本文通过水模型实验,研究了喷嘴结构对气泡在熔池中的分散、CO2吸收速率和利用率以及均混时间的影响规律.结果表明:使用 SSB -D 桨,搅拌转速200 r/min,通气流量为1.0 m3/h,偏心度0.4,浸入深度250 mm时,透气砖结构的喷嘴可以使熔池内的气泡分布"死区"减小,同时缩短了均混时间,提高了镁蒸气的容积传质系数和利用率.%Aimed to the problem of bubble micro refinement in desulfurization of hot metal pretreatment with magnesium vapor,effects of different nozzles structure on the bubbles dispersion in the molten, CO2absorption ratio and utilization,mixing time were studied with a water model experiment. Results showed that: under conditions of using SSB -D impeller, rotation speed 200rpm, gas flow rate 1.0 m3/h, the eccentricity 0.4, immersion depth 250 mm,the air brick nozzle can decrease the"dead zone"of the bubbles distribution. The mixing time and the absorption rate,can improve the volumetric transfer coefficient of the magnesium vapor.