Composite crystallizer

Abstract

The invention relates to a duplex type crystallizer which comprises a sliding type crystallizer which is taken as an upper crystallizer and a synchronous circulation mobile cooling belt device which is taken as a lower crystallizer. The duplex type crystallizer consists of the upper crystallizer and the lower crystallizer. The lower crystallizer consists of more than two cooling belts, a driven roller, a cooling device, a supporting roller and a driving roller, wherein, the driven roller and the driving roller are respectively positioned at the two ends of the cooling belt, the supporting roller and the cooling device are arranged between the driven roller and the driving roller, each cooling belt surrounds at the periphery of the driven roller, the cooling device, the supporting roller and the driving roller. The invention adopts the fractional crystallizer structure, the upper crystallizer only plays the role of shell-making, which can decrease the length and reduce the motion resistance of the casting blank; and no motion resistance exists between the lower crystallizer and the casting blank, thus lengthening the lower crystallizer and meeting the requirement of cooling the casting blank. The adoption of the duplex type crystallizer can promote the casting speed, improve the cooling capability, increase the productivity of a continuous casting machine and lower the occurrence possibility of accidents.

Description

technical field [0001] The invention relates to metal casting technology in the metallurgical industry, in particular to a compound crystallizer in continuous casting equipment. Background technique [0002] At present, with the continuous improvement of continuous casting capacity requirements, the requirements for the casting speed of continuous casting machines are also continuously increasing. Deformation occurs due to insufficient cooling, and more seriously, under the existing technical conditions, the casting speed increases, and the length of the crystallizer also needs to be increased, which leads to an increase in the frictional resistance of the billet casting process, causing serious accidents such as breakouts Frequent occurrence, resulting in significant economic losses. [0003] In the existing technology, the method of installing foot rolls, copper plates or cooling grids at the lower mouth of the crystallizer has alleviated some problems to a certain extent...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of large slab resistance and insufficient cooling in the existing mold at high casting speed, the task of the present invention is to provide a compound mold, which can completely solve the existing contradictions and greatly reduce the occurrence of slab The possibility of serious accidents such as deformation and steel breakout

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