Influence of Residual Slag and Steel on the Hot-cycle Operation of the Tundish

Abstract

No.4CC-2nd Strand machine at Kakogawa Works is a single strand continuous casting machine with the hot-cycle operation of the tundish under the hot condition. This caster has been designed for high quality slabs at low cost.
In this study, in order to prevent oxidation of the molten steel in the hot-cycle operation, the behavior of residual slag and steel was investigated. The Reduction of slag in tundish and the preserving the molten steel in tundish with slag can reduce the inclusion of cast steel. The Build up on the refractories in tundish arised from adhesion and growth of crystalized MgO (MnO) · Al₂O₃, calcium-aluminate in residual slag.
Further, the operation without pre-heating under the hot-cycle tundish can prevent the oxidotion of residual metal, which results the clean steel. (the decrease of inclusion)