A method of molten metal casting utilizing an impact pad in the tundish

Abstract

A method of molten metal casting utilizing an impact pad in the tundish introduces that the molten metal is transported into the tundish, at the bottom of which is located the impact pad with the spherical top, which captures the initial impact flow, the flow of molten metal is optimized and the molten metal is led away from the tundish.

Description

TECHNICAL FIELD[0001]The present invention relates to a method of molten metal casting utilizing an impact pad with spherical top in the tundish.BACKGROUND ART[0002]Tundish is usually weldment of steel plates with reinforcing ribs and is provided with a refractory lining. The tundish nozzles are walled in the bottom of the tundish. The fact is that the tundish operations can affect the quality of the molten metal just before casting, so the development of tundish metallurgy is very important.[0003]The tundish meets various metallurgical functions as a reservoir of liquid molten metal before casting and it is the transporter of molten metal or steel for individual casting streams during changing the ladle, minimizes the casting flow splash, reduces ferrostatic pressure of the molten metal, homogenized molten metal chemically and thermally, separates the liquid metal from slag, evaluates the casting speed, monitor the temperature of the molten metal, it uniforms the speed in casting, ...

AI Technical Summary

Benefits of technology

[0008]A method of molten metal casting utilizing an impact pad is proposed either for the regime of molten metal casting with changed characteristics, hence when there is molten metal with another quality in next ladle as it was in the previous ladle and therefore the tundish must be the most empty as possible, because the steel created by the mixture of the first and next ladle is unsaleable. The casting speed varies when the ladle is changing etc. and therefore the innovative casting method extends the retention time at lower and higher casting speeds. The molten metal is bringing into the tundish at the bottom of which is located the impact pad with the spherical top, which captures the initial casting flow, eliminates the impact energies, the liquid metal is led away from the tundish in the total potential tundish volume through the upper tundish nozzles and submerged entry nozzles to the next continuous casting equipment.

Problems solved by technology

The residual metal and slag, which remaining in the tundish should be mechanically removed before the next casting. otherwise this slag is recycling. but its removing is laborious and it prolonging the time of continual casting.

Another problem is the dead volume, leading to heat loss and conflux formation next to tundish nozzles and then their sealing.