Process method for controlling scab defect of continuous casting slab

Abstract

The invention relates to a process method for controlling a scab defect of a continuous casting slab. The method comprises the following steps: (1) controlling vibration deflection of a mould; (2) controlling uniform cooling of the mould; and (3) controlling the sinterability of mould fluxes. According to the scheme, equipment functional precision associated with the stress of an initial solidification shell in the mould is guaranteed through the process of strictly controlling the vibration accuracy deviation of the mould, controlling uniform cooling of the mould and controlling the sinterability of the mould fluxes so as to reduce the stress of the initial solidification shell at the position of a meniscus of the mould to control overflow of molten steel from the meniscus of the mould, otherwise, the overflowing molten steel and the meniscus touch twice and are welded, so that the initial solidification shell of the meniscus is bent and folded to form the scab defect, and accordingly, the quality of the continuous casting slab is improved, the continuous casting breakout accident is reduced, and continuous casting production is stabilized.

Description

technical field [0001] The invention relates to a process method, in particular to a process method for controlling scarring defects of continuous casting slabs, and belongs to the field of continuous casting process in iron and steel metallurgy. Background technique [0002] The scarring defect at the corner of the continuous casting slab is an important defect that affects the quality of the casting slab. The appearance of the scarring defect at the corner of the continuous casting slab will require surface finishing if it is light, and will lead to the appearance of the slab if it is serious. It will lead to a major accident of steel breakout in the continuous casting mold, which not only affects the normal production of continuous casting, but also affects the quality of the slab and increases the cost of the enterprise. [0003] In the prior art, the continuous casting slab scarring defect has always existed with the continuous casting technology. The defect is sometime...

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Problems solved by technology

[0002] The scarring defect at the corner of the continuous casting slab is an important defect that affects the quality of the casting slab. The appearance of the scarring defect at the corner of the continuous casting slab will require surface finishing if it is light, and will lead to the appearance of the slab if it is serious. It will lead to a major accident of steel breakout in the continuous casting mold, which not only affects the normal production of continuous casting, but also affects the quality of the billet and increases the cost of the enterprise

[0003] In the prior art, the continuous casting slab scarring defect has always existed with the continuous casting technology. The defect is sometimes absent, sometimes light and sometimes heavy, and has not been well resolved. Although technicians have carried out technical research from various aspects, However, due to the lack of relevant theoretical support and reference experience, the results have not been great, and the scarring defects at the corners of the continuous casting slab have been seriously perplexing the normal production of the steelmaking plant.

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