Roller type electromagnetic stirrer for block continuous-casting

Abstract

The invention relates to a roll-type electromagnetic stirrer for continuously casting a plate blank, which comprises components such as coil windings, an iron core and the like, and is characterized in that the iron core is designed into a columnar elongated iron core with teeth, and tooth shaped parts protruded on a column are magnetic poles; the coil windings are arranged among the magnetic poles of the iron core at intervals; the peripheries of the iron core and the coil windings are provided with squirrel-cage components made of non-magnetic materials, wherein a stirrer body consisting of the iron core, the coil windings and the squirrel-cage components has a still structure; the stirrer body is arranged in a fully-closed rotating carrier roller; and a cooling water passage for cooling coils is arranged between the stirrer body and the rotating carrier roller. The rotating carrier roller is made of non-magnetic stainless steel with high temperature resistance and high strength, and a shell is provided with a spiral chute which is convenient for water flowing and heat dissipation. Because the formed copper squirrel-cage components cannot rotate, the current of the windings of the stirrer is increased under the same voltage; and relatively, the power for generating the same current is reduced, so the stirrer is easy to generate stronger stirring force.

Description

technical field [0001] The invention relates to the field of metal smelting and continuous casting, in particular to a roller-type electromagnetic stirrer for slab continuous casting used in the continuous casting process. Background technique [0002] In the metallurgical continuous casting process, the slab is usually stirred by a low-frequency linear traveling wave magnetic field electromagnetic stirrer due to its flat strip shape. When choosing a stirrer, the user does not want to make too many changes to the sector, but hopes to directly make the shape of the electromagnetic stirrer into a common support roll. This not only ensures that the working surface of the agitator will always have the function of stirring the molten steel during working hours, but also ensures that the shell of the agitator has the support function of the rollers, and can be flexibly and conveniently installed at the end of the straight arc section of the continuous casting machine and the 1-6 s...

AI Technical Summary

Problems solved by technology

Since the diameter of the support roll is not large, and it needs to withstand a large steel shell extrusion force, it is necessary to ensure a certain thickness and strength of the roll shell, so that the inner space of the roll will be strictly limited

The deficiencies in the existing roller electromagnetic stirrer are: (1) The magnetic field diffuses around because there is no magnetic pole guidance; (2) The cross-section of the magnetic core is small, so that the magnetic field inside the core is easily saturated and a large amount of magnetic flux leakage occurs ; (3) The apparent power of the electromagnetic stirrer is large

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