Electromagnetic stirrer for continuous casting solidification end and dynamic control method thereof

Abstract

Disclosed are an electromagnetic stirrer for a continuous casting solidification end and a dynamic control method thereof. The electromagnetic stirrer for the continuous casting solidification end comprises an inner cylinder and an outer cylinder, wherein the inner cylinder is provided with a continuous casting billet, a direct current electromagnetic body is arranged between the inner cylinder and the outer cylinder, the direct current electromagnetic body is provided with an annular iron core with a salient pole and a coil which surrounds the annular iron core, the direct current electromagnetic body is driven by a drive device to rotate around the inner cylinder, an alternating magnetic field is formed in the continuous casting billet, and then an induced current is induced in the continuous casting billet, and the induced current and the alternating magnetic field interact and generate electromagnetic force so as to drive steel liquid in two phase areas to flow, accelerate redistribution of enriched solute and treelike crystals, and improve internal quality of the continuous casting billet. The dynamic control method of the electromagnetic stirrer for the continuous casting solidification end guarantees that a current stirring parameter is equivalent to the best stirring parameter so as to obtain the best stirring effects and stabilize the internal quality of the continuous casting billet.

Description

Technical field [0001] The invention relates to the field of steel continuous casting production, in particular to an electromagnetic stirrer for large-section square (round) billets in continuous casting production and a dynamic control method thereof. Background technique [0002] In the production process of steel continuous casting, due to the difference in solubility of solute elements in the solid phase and the liquid phase and the diffusion of the liquid phase, the solute elements are continuously excluded from the solid phase and enriched in the liquid phase. During the solidification process, the continuous casting slab is subjected to external forces such as thermal buoyancy, thermal shrinkage, and bulge deformation between the rolls to force the liquid phase to flow, causing the liquid phase rich in segregation elements to gather in the center of the slab, and finally form center segregation and center shrinkage. Holes are particularly serious on large-section cast sla...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the defect of insufficient stirring ability of the electromagnetic stirrer at the solidification end of the large-section continuous casting billet and the unstable electromagnetic stirring effect at the end of the continuous casting billet, and propose an electromagnetic stirrer with a strong magnetic field and low energy consumption and its dynamic The adjustment method can effectively drive the flow of molten steel in the two-phase region of the continuous casting slab, promote the redistribution of dendrites and molten steel enriched in solute elements, reduce the central segregation of the continuous casting slab, and stabilize the internal quality of the casting slab

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