rising gas rate and converter end oxygen content in liquid are analyzed and defined
and the production practice has carried out. The results show that the initial carbon content in liquid before RH refining should be controlled from 250 x 10
-6
to 400 x 10
-6
the end oxygen content in liquid of converter at tapping should be controlled from 250 x 10
-6
to 400 X 10
-6
. The statistic data of real production show that in beginning period of RH refining for 0 ~3 min
the max decarburization rate of each heat is up to 98 x 10
-6
/min
and at end of decarburization the carbon content in liquid is about 12 x 10