Multifunctional multi-mode electromagnetic flow control device of slab continuous casting crystallizer

Abstract

The invention discloses a multifunctional multi-mode electromagnetic flow control device of a slab continuous casting crystallizer. The device comprises an inner arc electromagnetic stirrer and an outer arc electromagnetic stirrer which are abbreviated as L-EMS and F-EMS respectively and arranged on an inner arc of a crystallizer copper plate and an outer arc of the crystallizer copper plate respectively; the L-EMS and the F-EMS are each provided with an upper sensor and a lower sensor, and each sensor is provided with four magnetic induction areas; each magnetic induction area is independently controlled by a PLC, the PLC controls the sizes, the directions and the phase sequences of coil currents by being connected with coils in the corresponding magnetic induction areas to change the magnetic field motion directions and the magnetic field polarities, and then the molten steel motion direction is changed; by changing the magnetic field motion direction and the magnetic field polarity of each magnetic induction area, multiple molten steel flow modes are combined. According to the device, three-dimensional adjustment of the magnetic field and flow field state in a casting blank is achieved through design of double sensors arranged on the inner arc side and the outer arc side and adjustment and control over the different stirring modes, and therefore not only can the casting blank surface quality problem be solved, but also the casting blank interior quality problem can be solved.

Description

technical field [0001] The invention belongs to an electromagnetic flow control device for molten metal slab continuous casting molds, in particular to a multifunctional and multi-mode electromagnetic flow control device for slab continuous casting molds. Background technique [0002] With the development of continuous casting technology and the improvement of continuous casting ratio, high productivity and high quality slab has become the goal pursued by today's slab continuous casting technology. The most critical and important technology to achieve high productivity and high-quality slab of continuous casting machine is to realize the flow control of molten steel in the mold. Conventional control techniques such as optimizing the shape and immersion depth of the submerged nozzle and controlling the molten steel level are beneficial to improving the molten steel flow in the mold, but they are not satisfactory. At the same time, the non-contact control technology using ele...

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Problems solved by technology

Chinese patent CN200910302486.3 proposes an inductor that can realize five stirring modes of single rotation, electromagnetic deceleration, electromagnetic acceleration, two-zone rotation and four-zone rotation. These modes can only change the magnetic field distribution and slab in the cross section Inner horizontal flow field distribution, but not adjustable in the longitudinal direction

Chinese patent CN201410120140.2 proposes a multi-dimensional electromagnetic modulation device, which adopts the structure of three sets of coils on one side. This method can realize three-dimensional electromagnetic stirring, but the structure is too complicated and bulky, and it is not suitable for the existing continuous casting crystallization. The transformation of the vibrating platform and the crystallizer is not very practical

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