Abstract Scope |
Thecalcium treatment of SPHC liquid steel produced by a domestic steel plantwas studied in this paper.According to multiple linear regression mrthod,the predictionmodel of calcium addition with composition and temperature of liquid steel, soft stirringtimebyargon gasand top slag condition was established based on the industrial RH refining data. The results show that the hit rates of the two multiplelinearregression models with constant terms or notare 89.5% and 81.5%, respectively, and the multiple linear regression model with constant termhas better fitting ability and higherhit rate.The calcium additionmainly depends on the content of [Ca], [AlS], [AlT], and [S] in liquidsteel.Therefore, forthe actual calcium treatment process, it is need to accurately controlthe calciumadditionby combiningwith the liquid steelcomposition. |