Compares the effects of two different tundish argon replacement methods

scheme I uses the argon rod to replace the air in the inner cavity of the tundish

and scheme 0 uses the joint action of argon gas pipe and argon rod on the tundish cover to replace the air in the tundish. Select the same steel grade

specification

replacement time and pipeline pressure to carry out the process test. Through comparison: (1) scheme U can more effectively replace the air in the inner cavity of the tundish and reduce the probability of secondary oxidation； (2) The oxygen content

nitrogen content

Als/Alt

inclusions in steel and other indicators of scheme H is better than those of scheme I

indicating that the protective casting effect of scheme II is better； (3) Scheme U can effectively prevent the formation of inclusions below 10 μm

especially small particle inclusions in the range of 2 μm ≤ X ＜5 μm.