渣罐底吹搅拌混合特性的模型研究

Model Research of Homogenous Mixing Characteristics in Bottom Blowing Slag Ladle

渣罐内添加剂的混匀行为对含钛高炉渣中钙钛矿的析出和长大存在重要影响。本文在底吹渣罐水模型的基础上,测定了粘度、气体流量对熔池底吹搅拌混匀时间的影响。结果表明,粘度相同时,随底吹气体搅拌能密度增大,溶液混匀时间缩短;搅拌能密度相同时,随溶液的粘度增大,溶液的混匀时间变长。回归出了水模型溶液的混匀时间与搅拌功率密度和粘度的关系方程式,并在此基础上计算出了25 t熔渣的混匀时间表达式。

The mixing time of additive in slag ladle has a great effect on the precipitation and growth of perovskite in slag bearing titanium. In the present study, a water model of slag ladle is used to determine the effect of viscosity and bottom stirring gas flowrate on homogenous mixing time of the solution. Results indicate that keeping constant solution viscosity, mixing time will decrease with increasing of gas stirring energy density. While keeping gas stirring energy density constant, mixing time will increase with increasing of solution viscosity. The relationship between solution homogenous mixing time, stirring energy density and viscosity of the water model solution is founded in regression method, based on this, the mixing time expression of 25t molten slag was carried out.