在底喷粉条件下，通过考虑颗粒与气体之间相互作用，对气固两相流中的颗粒进行受力分析。建立了描述颗粒在垂直流中的基本运动方程，确立了颗粒运动速度与时间及距离的关系，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。本研究为底喷粉工艺参数的制定及喷粉类透气砖的设计提供了理论依据。
During powder injection in the bottom-blown ladle, forces acting on particle were analyzed in consideration of the interaction between gas and particle. The motion equation of particle was established, and the relationship between the time of particle, moving distance and velocity was deduced. It shows that the velocity of little particle, after short time or distance acceleration, increases slowly.
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