Oblique pole type crystallizer electromagnetic stirring device

Abstract

The invention provides an oblique pole type crystallizer electromagnetic stirring device. The device comprises annular yoke iron and a magnetic field generating device. The annular yoke iron is located on the outer side of the crystallizer and keeps a certain distance away from the crystallizer, six rotary magnetic field generating devices are annularly installed on the inner wall of the annular yoke iron, each rotary magnetic field generating device is composed of a deflection iron core and a rotary magnetic field coil, and the rotary magnetic field coil winds the deflection iron core in thedirection parallel to the flowing direction of molten steel. According to the stirring device, a three-phase alternate current enters the rotary magnetic field generation device to generate a rotary magnetic field, molten steel components are allowed to be distributed in the crystallizer more uniformly under the action of electromagnetic force to reduce the temperature gradient, reduce the segregation of a casting blank and improve the quality of the casting blank.

Description

Technical field [0001] The invention belongs to the technical field of steel continuous casting equipment, and particularly relates to an oblique pole crystallizer electromagnetic stirrer. Background technique [0002] With the rapid development of modern industry, the quality requirements of various industries are getting higher and higher. Therefore, electromagnetic stirring technology is widely used in continuous casting production. At present, electromagnetic stirrers have become highly efficient continuous casting, and it is necessary to obtain high-quality cast slabs. Few links. [0003] The essence of electromagnetic stirring is to use the electromagnetic force induced in the liquid cavity of the slab to strengthen the movement of the molten steel in the liquid cavity, thereby strengthening the convection, heat and mass transfer processes of the molten steel. This process breaks the solidification front of the slab Dendritic dendrites promote the formation of equiaxed cryst...

AI Technical Summary

Problems solved by technology

During the bloom continuous casting production process, it is easy to generate a flow dead zone at the corner of the billet, resulting in slab defects. If the flow rate of the submerged nozzle is too high, it will impact the initial solidified shell of the slab and hinder the floating of inclusions. Seriously affect the quality of continuous casting slab

[0005] At present, most of the mold electromagnetic stirrers in industrial continuous casting production are conventional electromagnetic stirrers, and the rotating magnetic field generated by them can stir the molten steel horizontally, so that the temperature distribution of the molten steel in the mold can be more uniform, the equiaxed crystal ratio can be increased, and the segregation, but the stirring of the corner of the billet by the rotating magnetic field currently used is still not satisfactory, and it is necessary to improve the electromagnetic stirrer of the crystallizer

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