By established a model of inclusions dynamic at the steel-slag interface the refining slag absorbing inclusions phenomenon is studied. Results show that certain parameters

i. e. particle size

interfacial tension and slag viscosity

determine the inclusions transfer behavior. Paiticle size and interfacial tension determine definitely large size inclusions transfer behavior

while interfacial tension only determines definitely micro size inclusions rating ≤20 ㎛ transfer behavior. Macro-sizes affects the inclusions displacement more than the Micro-sizes. For the removal of Micro-inclusions

by inclusions mathematical dynamic model coupled by steel and slag surface tension models

the effect of interfacial tension on obsorbing process has been studied. It is obvious that the particles blow 122.9 ㎛  size could be rebounded into steel when they are flowed to steel-slag interface layer. It is obtained that there is no way by re-designing refining slags to effectively remove ≤ 122. 9 ㎛ micro-inclusions from steel to slag layer and further to get the aim to decrease the oxygen content in steel.