Flow distribution type tundish and pouring system used for thin-strip continuous casting

Abstract

The invention discloses a flow distribution type tundish and pouring system used for thin-strip continuous casting. A baffle weir, a baffle dam and a flow distribution water port module are arranged in the flow distribution type tundish so that uniform distribution of molten steel can be realized. In the casting process, after the molten steel enters the flow distribution type tundish from a large ladle, the liquid level crosses over the dam crest after climbing, then the molten steel evenly flows out through the flow distribution water port module, and then the molten steel enters an inter-roller molten pool. Under reasonable baffle dam parameters, the temperature uniformity of the flow distribution molten steel is improved, the risk that edge flow distribution water ports are blocked is reduced, then the temperature uniformity of the molten steel in the molten pool is improved, and the effect of optimizing the plate shape can be achieved. According to the flow distribution type tundish and pouring system used for thin-strip continuous casting, by adopting a large ladle-flow distribution type tundish system, average distribution of the molten steel before entering a double-roller continuous casting system can be completed, and compared with a large ladle-tundish-transition ladle three-ladle casting system widely used at present, the temperature loss of the molten steel in a flow distribution system is greatly reduced.

Description

technical field [0001] The invention belongs to the field of thin strip continuous casting, in particular to a distribution type tundish and pouring system for thin strip continuous casting. Background technique [0002] Thin strip continuous casting technology is a new type of thin strip steel production process. Compared with the traditional hot rolling process, the production line occupies a small area, low energy consumption, and low carbon emissions. Different from the traditional continuous casting, the strip continuous casting process uses a pair of copper casting rolls with a built-in water cooling system to replace the mold in the traditional continuous casting process. The molten steel forms a molten pool between the casting rolls. Rotating in opposite directions, the molten steel solidifies on the surface of the casting rolls and forms a solid cast strip below the casting rolls. [0003] In order to form a cast belt with uniform thickness and good shape, the molt...

AI Technical Summary

Problems solved by technology

First of all, compared with the conventional continuous casting system, the introduction of transition ladle brings additional temperature drop—so in order to ensure sufficient superheat of molten steel, the tapping temperature must be increased accordingly, which results in additional energy consumption and Refractory loss

Secondly, in the current thin strip continuous casting production process, it is found that the uniformity of the tapping temperature at each outlet hole is not enough, the tapping temperature of the middle outlet hole is high, and the side outlet holes have too low temperature of molten steel, which leads to There is a risk of cold steel blockage. The above situation will lead to uneven temperature distribution of molten steel in the molten pool along the width direction of the casting strip, which will affect the casting strip shape, and even lead to broken pouring in severe cases.

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