Electromagnetic device for stirring metal melt spirally

Abstract

The invention discloses an electromagnetic device for stirring metal melt spirally to improve the effect of stirring the metal melt of a cast billet. The electromagnetic device comprises an electromagnetic sensing system, a power supplying system, a cooling system and a box; the electromagnetic sensing system comprises a magnetic yoke group and a coil winded on the magnetic yoke group; the power supplying system comprise a two or three-phase power supply cabinet and a variable-frequency control cabinet; the cooling system comprises a water inlet and a water outlet on the box and is connected with a water pump and a reservoir through water pipes to form a cooling loop; the box is made of metal or non-metal material; and the electromagnetic sensing system is arranged in the box after being made to be insulating. The electromagnetic device has a simple structure and a wide application range, promotes the formation and the grain refinement of an isometric crystal and the floating of impurities and hereby reduces the defects of thermal cracking and macro-segregating of the cast billet (ingot) and improves the internal and external quality of the continuously cast billet and (ingot).

Description

technical field [0001] The invention relates to the field of electromagnetic casting and material electromagnetic processing and molding, in particular to a metal melt spiral magnetic field electromagnetic stirring device for metal continuous casting, semi-solid casting and directional solidification process. Background technique [0002] The electromagnetic field is one of the important physical fields in nature. It has many advantages that cannot be compared with thermoelectric technology. The most notable feature is that it can transfer heat and kinetic energy to the metal melt, and there is no contact between the melt and the magnetic field generator. The metal melt is free from contamination. Slab continuous casting is a crucial prerequisite in the production process of high-quality slabs. Currently, the electromagnetic induction technologies used in the mold of slab continuous casting mainly include: 1. Rotating magnetic field stirring technology, 2. Electromagnetic ac...

AI Technical Summary

Problems solved by technology

Stacking multiple rotating magnetic field generators up and down together, according to the principle of electromagnetic fluid mechanics, will generate vertical traveling wave force in the metal melt, but it is affected by the number of yoke arrangements on the vertical section and the continuity of the yoke back , the magnitude of this force will be much smaller than the circumferential rotational force, so the spiral stirring effect will be limited

Similarly, with the helical agitation formed by the traveling wave magnetic field juxtaposed in the circumferential direction, the rotational force in the circumferential direction will be much lower than the traveling wave force in the circumferential direction, which is not conducive to effective helical agitation

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