Method for plugging dummy bar head of slab caster

Abstract

The invention discloses a method for plugging a dummy bar head of a slab caster. The technological process is characterized in that a steel chisel plugs a paper string in the gap between the dummy bar head and a crystallizer, two sheet iron plates are placed at the corner of a hook head, nail scraps are used to cover the periphery of the paper string, springs are horizontally placed at the bottom layer in a groove and springs are vertically upward placed; and other parts outside the groove are transversely placed in a staggering way. The invention has the advantages that the molten steel filling state in the dummy bar head plugged by adopting the method is good, the plug and the dummy bar head are reliably connected, no starting unhook or slab clamping accidents occur, the situation of starting breakout is avoided, the heavy ladle return refining is avoided, the normal field production rhythm is guaranteed and the safety factors of personnel and devices are improved.

Description

technical field [0001] The invention belongs to the technical field of steelmaking continuous casting and rolling, and in particular relates to a plugging method for a dummy head of a slab continuous casting machine. Background technique [0002] When the normal continuous casting machine starts casting, the bottom of the crystallizer is blocked with a dummy head to keep the molten steel in the mold for rapid cooling at the initial stage of casting, and the billet head formed after the molten steel is cooled is connected with the dummy head. Pull out the crystallizer together with the dummy head to achieve drainage. If the dummy head is not well sealed, it will cause accidents such as leakage. [0003] Due to the large width-to-thickness ratio of the mold for slab continuous casting machines, especially thin slab continuous casting machines, the flow of molten steel along the width direction of the mold is uneven, and it is easy to have local molten steel not filled and not...

AI Technical Summary

Problems solved by technology

If the dummy head is not well sealed, it will cause accidents such as leakage

[0003] Due to the large width-to-thickness ratio of the mold for slab continuous casting machines, especially thin slab continuous casting machines, the flow of molten steel along the width direction of the mold is uneven, and it is easy to have local molten steel not filled and not solidified in time, which can easily lead to hooks. If the connection with the billet is not good, if it starts under this condition, it is easy to cause a steel breakout accident, or a billet clamping accident after decoupling due to poor connection between the dummy head and the billet head, which poses a great threat to personal and equipment safety.

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