Dynamic secondary cooling control method for slab continuous casting based on double-cooling mode

Abstract

The present invention discloses a dynamic secondary cooling control method for slab continuous casting based on a double-cooling mode, which comprises the following steps of: collecting casting process data and indexing target cooling temperatures and ABC parameters of each cooling area; dynamically calculating the heat conduction process of a continuously cast slab in the current period according to a heat conduction equation; calculating the temperature tracking error of each cooling area and calculating the water amount of each cooling area in a second cooling mode by taking the temperature tracking error as a regulation factor; respectively calculating the water amount of each cooling area in a first cooling mode based on the ABC parameters and the current casting speed; determining whether the temperature tracking error exceeds a preset threshold and comparing the water amounts in the two modes to determine the cooling mode and the controlled water amount in the current period; and validating the reasonableness of the controlled water amount, and correcting the controlled water amount to be a preset maximum water amount or minimum water amount if the controlled water amount exceeds the preset maximum water amount or minimum water amount. The invention guarantees the quality stability of the cast blank in secondary cooling process.

Description

technical field [0001] The invention relates to metallurgical slab continuous casting technology, in particular to a dynamic secondary cooling control technology of slab continuous casting. During the change process of continuous casting process parameters, the water quantity can be controlled reasonably and the secondary cooling can be improved to ensure the stability of the quality of the slab. Background technique [0002] In the metallurgical continuous casting process, after the slab leaves the crystallizer, under the action of the cooling water in the secondary cooling zone, the cooling and solidification process of the internal molten steel is completed at a certain cooling rate. The problem is the influence of secondary cooling on the quality of the continuous casting slab. Excessive cooling intensity, too small or uneven cooling will affect the quality of the casting slab. For example, overcooling of the corners of the slab will cause corner cracks, and uneven cool...

AI Technical Summary

Problems solved by technology

The problem is the impact of secondary cooling on the quality of continuous casting slabs. Excessive cooling intensity, too small or uneven cooling will affect the quality of casting slabs

The above patents are all different from a dynamic secondary cooling control method for slab continuous casting based on dual cooling modes proposed by the present invention, and no technology identical or similar to the present invention has been seen so far.

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