Vertical type electromagnetic braking device for controlling flow of molten steel in continuous casting crystallizer

Abstract

The invention relates to a vertical type electromagnetic braking device for controlling flow of molten steel in a continuous casting crystallizer. The vertical type electromagnetic braking device comprises one or two pairs of horizontal magnetic poles, a magnet exciting coil, two pairs of vertical type magnetic poles and a magnet yoke; when one pair of horizontal magnetic poles are arranged, the horizontal magnetic poles are located below an intrusive type water opening and distributed along a wide face of the crystallizer; when two pairs of horizontal magnetic poles are arranged, the horizontal magnetic poles are marked as upper horizontal magnetic poles and lower horizontal magnetic poles, the lower horizontal magnetic poles are located below the intrusive type water opening and distributed along the wide face of the crystallizer, and the upper horizontal magnetic poles are located nearby the surface of the molten steel in the crystallizer and distributed along the wide face of the crystallizer; the two pairs of vertical type magnetic poles are distributed nearby areas of the two side faces of the crystallizer and intersect with the one or two pairs of horizontal magnetic poles; the magnet exciting coil and the magnet yoke are matched with the horizontal magnetic poles to be installed, a current is exerted through the magnet exciting coil, and a steady-state magnetic field is generated between the horizontal magnetic poles and the vertical type magnetic poles; and when passing through the steady-state magnetic field, the molten steel flowing in the crystallizer bears electromagnetic force opposite to the flowing direction of the molten steel, and flow of the molten steel in the crystallizer is controlled through the electromagnetic force.

Description

technical field [0001] The invention belongs to the technical field of continuous casting, in particular to a vertical electromagnetic braking device for controlling the flow of molten steel in a continuous casting crystallizer. Background technique [0002] In the process of continuous casting, molten steel enters the crystallizer through the submerged nozzle at a certain jet angle, and the molten steel flowing out from the submerged nozzle will hit the side area of ​​the mold at a certain flow rate, thereby forming up-flow and down-flow Reflux. [0003] The molten steel flowing back from above will impact the surface of the molten steel in the mold, thereby causing liquid level fluctuations, especially aggravating the liquid level fluctuations near the meniscus on the side of the mold, and easily causing slag entrainment. [0004] The penetration depth of molten steel flowing back from the bottom is relatively large, which will bring heterogeneous substances such as inclu...

AI Technical Summary

Problems solved by technology

[0013] Aiming at the problems existing in the prior art, the present invention provides a new and improved vertical electromagnetic brake device for controlling the flow of molten steel in the continuous casting mold, which preferentially suppresses the impact of the liquid steel flowing out of the nozzle on the side of the mold and the bending of the mold. While the molten steel surface flows on the lunar surface, it can control the molten steel flow in the central area of ​​the mold, avoiding the situation that the surface flow rate of the molten steel in the central area of ​​the mold is too low and the impact depth of the molten steel under the reflow is too deep, so as to inhibit the steel Fluctuations and slag entrainment on the liquid surface promote the floating of heterogeneous substances such as slag inclusions and air bubbles, so that the metallurgical effect of electromagnetic braking is less affected by changes in process parameters

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