Dynamic soft measurement method for thickness of blank shell of continuous casting blank

Abstract

The invention provides a dynamic soft measurement method for the thickness of a continuous casting blank shell. The method comprises the following steps: solving a partial differential equation of a solidification heat transfer model by constructing a life cycle model from a crystallizer to a secondary cooling region to obtain temperature distribution of a casting blank, obtaining distribution of a temperature field of the casting blank by utilizing a life cycle model method, solving to-be-identified parameters in the solidification heat transfer model by combining a particle swarm algorithm, and obtaining a thickness value of a casting blank shell according to distribution of a casting blank temperature field. According to the method, the dynamic heat conduction model of the casting blank is established based on a numerical simulation method, and the temperature field distribution of the casting blank is obtained by combining the life cycle model and the particle swarm optimization, so that a new method is provided for dynamically measuring the thickness of a blank shell in the casting blank production process of a steel mill. The cooling water amount of a continuous casting machine control system is reasonably distributed, the technical problems that the thickness of the blank shell is difficult to measure and the cost is high are solved, and the practical application value is achieved.

Description

technical field [0001] The invention belongs to the technical field of steelmaking and continuous casting, and in particular relates to a dynamic soft measurement method for the shell thickness of a continuous casting slab. Background technique [0002] The production of slabs is mainly completed in the continuous casting machine, and its production process includes the crystallizer, the secondary cooling zone, and the air cooling zone. The secondary cooling zone of the continuous casting machine is an important link in the production of slabs. The production of slab is that the liquid molten steel first forms the initial slab shell in the crystallizer, and then goes through the secondary cooling zone for further cooling and solidification. The thickness of the slab shell continues to increase, and finally it is completely solidified to form a slab. The shell thickness of the slab is the key factor affecting the quality of the slab, and the location information of the solid...

AI Technical Summary

Problems solved by technology

The nailing test method is mainly to inject steel nails containing FeS into the slab, and determine the thickness of the slab shell according to the melting of the steel nails in the sulfur stamp and the distribution of S; since the continuous casting process is an exothermic process, the It can be described by the heat conduction model, which can calculate the temperature distribution of the slab and predict the shell thickness of the slab; the above-mentioned experimental method can only be carried out at a limited position, so that the data of the shell thickness is limited, and the product is wasted ; The accuracy of the numerical simulation method is relatively low

[0005] In summary, the current shell thickness prediction method has problems such as limited prediction area, low data accuracy, waste of materials, etc.

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