Dynamic control method and device for electromagnetic stirring position at solidification end in continuous casting of steel

Abstract

The invention discloses a dynamic control method and device for an electromagnetic stirring position at a solidification end in continuous casting of steel, and belongs to the field of iron and steel metallurgy continuous casting production control. A continuous casting dynamic tracking model is established by adopting a double linked list comprising continuous casting tracking units, continuous casting process parameters are acquired in real time, and solidification information of a continuous casting billet is calculated. By comparing a current electromagnetic stirring position with an optimal electromagnetic stirring position, the displacement required by a solidification-end electromagnetic stirrer is calculated in real time and the solidification-end electromagnetic stirrer is guaranteed to be always in an optimal stirring position of the cast steel. The device comprises an arc-shaped guide rail, a slide mechanism, a drive mechanism and a controller, wherein the solidification-end electromagnetic stirrer is fixedly mounted on the slide mechanism; the slide mechanism is positioned on the arc-shaped guide rail; one end of the drive mechanism is connected with the slide mechanism, and the other end of the drive mechanism is connected with the controller. The dynamic control method and device better solve a difficult problem of incapability of adjusting a conventional solidification-end electromagnetic stirrer in real time along with a continuous casting process, and are good in field implementation effect.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgical continuous casting production control, and in particular relates to a dynamic control method and device for the electromagnetic stirring position at the solidification end of steel continuous casting. Background technique [0002] Due to the difference in the solubility of solute elements in the solid-liquid two phases, the solidification dendrite growth process of steel continuous casting is accompanied by the exclusion of solute elements from the solid phase to the liquid phase, and gradually enriched between the dendrite arms to form solute micro-segregation. At the same time, the solidification shrinkage of the slab at the end of solidification and the bulging of the slab between the rolls can easily cause the molten steel rich in segregation elements to gather at the center of the slab to form serious central segregation, which is difficult to effectively eliminate in the later heat...

AI Technical Summary

Problems solved by technology

However, the continuous casting production process is usually difficult to keep completely stable, and the change of continuous casting process parameters will directly affect the electromagnetic stirring effect

In particular, the change of continuous casting steel type and casting speed will significantly affect the temperature and thickness of the liquid core of the slab in the electromagnetic stirrer at the end of solidification, thereby affecting the effect of electromagnetic stirring at the end of solidification

For this reason, the traditional method of installing an electromagnetic stirrer at the solidification end at a fixed position cannot fully meet the production requirements of continuous casting. The electromagnetic stirring effect at the solidification end is not obvious, and the internal quality of the slab is unstable, making it difficult to meet the production requirements of high-quality continuous casting slabs.

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