Full-winding electromagnetic stirring device for plate billet continuous casting crystallizer and plate billet continuous casting crystallizer

Abstract

The invention discloses a full-winding electromagnetic stirring device for a plate billet continuous casting crystallizer and a plate billet continuous casting crystallizer. The electromagnetic stirring device comprises a columnar iron core of which the working surface is not provided with a tooth socket; the non-working surface of the columnar iron core is arranged in an inner water cooling sleeve; a plurality of coils are wound on the working surface of the columnar iron core and the inner water cooling sleeve; the coils on the inner water cooing sleeve are arranged in an outer water cooling sleeve; circulating pipes are arranged in both the inner water cooling sleeve and the outer water cooling sleeve; two ends of each circulating pipeline are respectively communicated with a water pipe connector. The space utilization of a coil winding is improved furthest, the magnetic conduction area of the columnar iron core is increased, and the magnetic field intensity is improved, so the electromagnetic force of the electromagnetic stirring device is increased by 10-20 percent, the production period is shortened by 1 / 3, and the universality is high.

Description

technical field [0001] The invention relates to an electromagnetic stirring device and a crystallizer, in particular to an electromagnetic stirring device for a full-winding slab continuous casting crystallizer and a slab continuous casting crystallizer. Background technique [0002] The practice of continuous casting shows that the surface and internal defects of the slab and the erosion of the primary slab shell are mostly closely related to the flow morphology of molten steel in the mold. Controlling the flow of molten steel in the mold, especially the flow of molten steel near the meniscus, has a great influence on the realization of high quality and high productivity of slab continuous casting. The electromagnetic stirring flow control technology of the slab continuous casting mold using electromagnetic force is more and more popular because of its non-contact, pollution-free, effective improvement of the surface and internal quality of the slab, uniform thickness of th...

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Problems solved by technology

[0004] The existing slab continuous casting mold electromagnetic stirring device has the following disadvantages: a. The columnar iron core adopts the alveolar structure, and the teeth of the columnar iron core occupy a large volume, and there are bosses between the alveoli. Under the same excitation current, it is bound to reduce its winding space, that is, the number of ampere turns of the electromagnetic inductor, so that the proportion of the section of the winding and the cylindrical iron core is reduced, the number of turns of the coil and the magnetic permeability area are small, so the magnetic field is also small

b. The hysteresis heating of the cylindrical iron core and the Joule heating of the winding are relatively large, which affects the life of the device

c. Due to the existence of tooth grooves, it also brings great difficulties to the production of the entire columnar iron core, thus increasing the production cycle of the entire electromagnetic stirring device

d. The installation position is fixed and cannot be adjusted online, which may easily cause fluctuations in the molten steel level, which is not conducive to finding the stirring position for the best metallurgical effect

e. The control mode of the electronic control system is single, which does not meet the needs of multi-mode industrial applications

At present, there are very few studies on slab continuous casting molds, and the existing slab molds all use electromagnetic stirring devices with cylindrical iron cores with slots

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