精炼钢包透气砖中喷粉颗粒的运动特性

MOTION CHARACTERISTICS OF INJECTED POWDER THROUGH POROUS BRICK MOUNTED IN THE BOTTOM OF REFINING LADLE

在底喷粉条件下,通过考虑颗粒与气体之间的相互作用,对气／固两相流中的颗粒进行了受力分析．建立了描述颗粒在垂直流中的基本运动疗程,确立了颗粒运动速度与时间及距离关系的解析式,发现颗粒经过极短时间或距离加速后进入速度增加缓慢的平缓区．为底喷粉工艺参数的制订及喷粉类透气砖的设汁提供了理论依据．

During powder injection in the bottom-blown ladle, the forces acting on particle were analyzed considering the interaction between gas and particle. The motion equation of particles was established in a vertical flow, and the relationship between the velocity of particles, moving distance and time was deduced, which shows that the velocity of small particles increases slowly after acceleration in short time or distance. According to the relational expressions, some parameters for structure design of slot plug and powder injection technics can be established.