Pouring gate flow control device for preventing rotational flow from generating in continuous casting tundish

Abstract

The invention discloses a pouring gate flow control device for preventing a rotational flow from generating in a continuous casting tundish and belongs to the technical field of tundish pouring gate flow control devices. The pouring gate flow control device for preventing the rotational flow from generating in the continuous casting tundish comprises a liquid discharge pipe, a liquid inlet plate, flow guide holes, a flow control stopper rod and a lift mechanism. The liquid discharge pipe penetrates through the bottom of the tundish and extends into the inner portion of the tundish. The liquid discharge pipe is hollow. One end portion of the liquid discharge pipe, extending into the tundish, is fixedly connected with the liquid inlet plate. The top and the side faces of the liquid inlet plate are respectively sealed. One or more flow guide holes are formed in the bottom face of the liquid inlet plate. An opening of each flow guide hole is downward. Each flow guide hole is communicated with a hollow portion in the liquid discharge pipe. The flow control stopper rod is arranged right below the flow guide holes. The outer diameter of the flow control stopper rod is matched with the inner diameter of the corresponding flow guide hole. The flow control stopper rod is vertically arranged and fixed on the bottom of the tundish. The lift mechanism is arranged at one end, located outside the tundish, of the liquid discharge pipe and controls lift of the liquid discharge pipe and the liquid inlet plate. The pouring gate flow control device for preventing the rotational flow from generating in the continuous casting tundish can effectively prevent the rotational flow from generating and improve purity of liquid steel.

Description

technical field [0001] The invention relates to the technical field of nozzle flow control of a continuous casting tundish, and more specifically relates to a nozzle flow control device for preventing swirling flow in a continuous casting tundish. Background technique [0002] During the casting process, the molten metal is often accompanied by a swirl when it flows out from the discharge port, and the formation of the swirl will affect the quality of the metal product. This phenomenon is often encountered in the continuous casting of steel. When the molten steel in the tundish is discharged from the nozzle, if the liquid level of the molten steel is lower than a certain critical value, a swirling flow will be generated, and the generation of the swirling flow will cause the liquid surface to cover The entry of slag and air into the molten steel will have a great impact on the quality of the steel for some high-quality steel types, so some methods are often used to reduce th...

AI Technical Summary

Problems solved by technology

Its disadvantage is that although the molten steel flows in from the side hole, which effectively reduces the vortex, when the molten steel reaches a certain level, a swirling flow will still occur, causing slag and air to be involved in the molten steel, affecting the quality of the molten steel

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