Continuous casting tundish and continuous casting tundish casting control method

Abstract

The invention provides a continuous casting tundish which comprises a second-rate slab continuous casting tundish, a tundish body, a long nozzle 1, a stopper 2, a flow stabilizer 3 and a double retaining wall flow control device. The long nozzle 1 is fixed on the tundish body. The stopper 2 is fixed on the tundish body. The flow stabilizer is located below the long nozzle 1. The double retaining wall flow control device is located between the long nozzle 1 and the stopper 2 and comprises a lower retaining wall 4 and a small retaining dam 5. The small retaining dam 5 is located on the rear side of the lower retaining wall 4. By the continuous casting tundish, liquid surface fluctuating of an flow injection area can be effectively controlled, dead area proportion on the rear side of the lower retaining wall is reduced, tundish casting stoppage is lowered, and average staying time of steel liquid in the tundish is prolonged.

Description

technical field [0001] The invention relates to the field of tundish technology, in particular to a continuous casting tundish and a casting control method for the continuous casting tundish. Background technique [0002] As a transitional container for buffering, storing and realizing multi-furnace continuous casting in the continuous casting process, the tundish plays an increasingly important role in purifying molten steel and promoting full mixing of molten steel. At present, the iron and steel metallurgical slab continuous casting tundish at home and abroad is a two-flow symmetrical tundish, which mainly adopts the flow control method of the combination of turbulent flow controller and retaining wall. It is symmetrical and axisymmetric, but there are certain defects in the flow control combination of turbulence controller + single dam in the two-flow symmetrical tundish used in the past: (1) If the lower retaining wall without holes is used, there are often certain gaps...

AI Technical Summary

Problems solved by technology

At present, the iron and steel metallurgical slab continuous casting tundish at home and abroad is a two-flow symmetrical tundish, which mainly adopts the flow control method of the combination of turbulent flow controller and retaining wall. It is symmetrical and axisymmetric, but there are certain defects in the flow control combination of turbulence controller + single dam in the two-flow symmetrical tundish used in the past: (1) If the lower retaining wall without holes is used, there are often certain gaps behind the lower retaining wall. The dead zone, and the amount of residual steel in the tundish after the stop of pouring is relatively large; (2) If the lower retaining wall with holes is used, the problem of the dead zone behind the lower retaining wall can be solved, and the residual steel in the tundish after the stop of pouring can also be reduced. steel quantity, but there is a short-circuit flow that flows directly from the bottom of the hole; (3) After adopting the turbulence controller + upper and lower retaining walls, adding the upper retaining wall is not conducive to the improvement of the flow field of the tundish, and the residence time of the molten steel in the tundish is reduced. Small

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