Study on inclusion removal of ladle argon blowing process

Based on the improved ladle argon blowing in Xinyu Steel Plant, the average removal rate of macro-inclusions in steel can be reached 34.3% with electrolyzing analysis; especially, the macro-inclusions with a diameter above 300 μm can be completely wiped off. The types of inclusions are mainly silicate and sulfide in the samples determined by SEM analysis. Microscope statistics analysis shows that the amount of mi-cro-inclusions in each diameter range has been decreased. The analyzing result also shows that the inclusion re-moval rate in the improved ladle argon blowing process is obviously increased. The argon blowing process di-rectly determines the removal rate of macro-inclusions and micro-inclusions.