A system and method for predicting the thickness of the initial solidified billet shell in a steel continuous casting crystallizer

Abstract

The invention provides a prediction system and method for the thickness of an initially solidified shell in a continuous steel casting crystallizer. The system comprises an information collection module, a steel grade thermophysical parameter calculation module, a crystallizer initially solidified shell growth prediction module and a result output module. The method comprises the following steps: detecting a bleed-out shell microcosmic solidification structure; collecting initial information; computing the interdendritic solute segregation and solidification path in a molten steel solidification process to obtain a steel grade thermophysical parameter; solving a crystallizer molten steel flow field, a crystallizer temperature field and a crystallizer solute field, coupling a macroscopic transport process in the crystallizer and the evolution behavior of the microcosmic solidification structure in the crystallizer, and further predicting the shell growth behavior in the solidification process of high-temperature molten steel in the continuous steel casting crystallizer; outputting and displaying the comparative results of the predicted morphology of the solidification structure in the crystallizer, the predicted initially solidified shell thicknesses in different positions in the crystallizer and the actual thickness of the initially solidified shell. The system and the method can accurately predict the microcosmic solidification behavior of the initially solidified shell in the crystallizer.

Description

technical field [0001] The invention belongs to the technical field of metallurgical process production, and in particular relates to a prediction system and method for the thickness of an initial solidification slab shell in a steel continuous casting crystallizer. Background technique [0002] As the most critical component in the continuous casting machine, the continuous casting mold is called the "heart" of the continuous casting machine. The high-temperature molten steel flows into the crystallizer through the submerged nozzle, and under the action of the crystallizer cooling water, a primary solidified shell of a certain shape is formed. The uniformity of the primary solidified slab shell in the crystallizer plays a decisive role in the surface quality of the continuous casting slab and the continuous casting castability, and the thickness of the solidified slab shell is related to the strength of the slab. It is very important to prevent breakout. For this reason, ...

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Problems solved by technology

Therefore, the mathematical model calibrated by the traditional breakout shell thickness measurement method cannot accurately predict the solidification thickness of the mold

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