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Independent adjustable combined electromagnetic braking device and method for controlling flowing of molten steel

An electromagnetic braking and adjustable technology, applied in the field of continuous casting, to achieve the effect of reducing impact, restraining impact and stabilizing the fluctuation of steel slag interface

Active Publication Date: 2019-04-12
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the problems existing in the prior art, the present invention provides an independently adjustable combined electromagnetic brake device for controlling the flow of molten steel, which can preferentially suppress the impact of molten steel flowing out of the nozzle on the side of the crystallizer and control the central area of ​​backflow under the mold While the molten steel is flowing, it can suppress the impact of the upper backflow molten steel on the meniscus near the narrow surface of the mold and the steel slag interface, avoiding too deep flow impact of the lower backflow area when the flow rate of the molten steel outflow from the nozzle is too high In order to promote the floating of heterogeneous substances such as non-metallic inclusions and argon bubbles in the central area of ​​the mold, and to suppress the fluctuation of the molten steel surface of the mold and the occurrence of slag entrainment

Method used

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  • Independent adjustable combined electromagnetic braking device and method for controlling flowing of molten steel
  • Independent adjustable combined electromagnetic braking device and method for controlling flowing of molten steel
  • Independent adjustable combined electromagnetic braking device and method for controlling flowing of molten steel

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Embodiment 1

[0056] This implementation uses the image 3 In the shown independently adjustable combined electromagnetic braking device, in this embodiment, the vertical iron core 10 is set on the vertical magnetic pole 4, and the vertical magnetic pole 4 can move along the width direction of the crystallizer 1, and the horizontal magnetic pole 2 can move along the width direction of the crystallizer. 1 The thickness in the height direction is 150mm, the cross-sectional size of the crystallizer 1 is 1200mm×200mm, the height of the vertical magnetic pole 4 is 420mm, the electromagnetic braking DC power supply is 0-4000A, and the thickness center of the crystallizer 1 is changed under the current intensity The magnetic field distribution diagram along the height direction of the crystallizer 1.

[0057] An independently adjustable combined electromagnetic braking method for controlling the flow of molten steel, using an independently adjustable combined electromagnetic braking device for con...

Embodiment 2

[0062] This embodiment adopts as image 3 In the shown independently adjustable combined electromagnetic braking device, in this embodiment, the vertical iron core 10 is set on the vertical magnetic pole 4, and the vertical magnetic pole 4 can move along the width direction of the crystallizer 1, and the horizontal magnetic pole 2 can move along the width direction of the crystallizer. 1 The thickness in the height direction is 150mm, the cross-sectional size of the crystallizer 1 is 1200mm×200mm, the height of the vertical magnetic pole 4 is 420mm, the inclination angle of the side hole of the submerged nozzle 8 is -15°, and the immersion depth of the submerged nozzle 8 is 210mm, the casting speed is 1.8m / min, the electromagnetic braking DC power supply is 0-4000A, and the flow field distribution of the molten steel at the center plane of the mold 1 thickness under the condition of with and without electromagnetic braking.

[0063] An independently adjustable combined electro...

Embodiment 3

[0068] This embodiment adopts as image 3 In the shown independently adjustable combined electromagnetic braking device, in this embodiment, the vertical iron core 10 is set on the vertical magnetic pole 4, and the vertical magnetic pole 4 can move along the width direction of the crystallizer 1, and the horizontal magnetic pole 2 can move along the width direction of the crystallizer. 1 The thickness in the height direction is 150mm, the cross-sectional size of the crystallizer 1 is 1200mm×200mm, the height of the vertical magnetic pole 4 is 420mm, the inclination angle of the side hole of the submerged nozzle 8 is -15°, and the immersion depth of the submerged nozzle 8 is 210mm, the billet casting speed is 1.8m / min, the electromagnetic braking DC power supply is 0-4000A, with or without electromagnetic braking and the flow velocity distribution diagram at 6 locations on the molten steel surface on the center surface of the thickness of the crystallizer 1 under changing DC pow...

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Abstract

The invention discloses an independent adjustable combined electromagnetic braking device and method for controlling flowing of molten steel. The device comprises a crystallizer, wherein horizontal magnetic poles are arranged on the wide surface of the crystallizer, horizontal excitation coils are arranged on the outer sides of the two horizontal magnetic poles correspondingly, a magnetic yoke isarranged on the crystallizer in a sleeve mode, the magnetic yoke corresponds to the horizontal excitation coils, the inner surface of the magnetic yoke is in clearance fit with the outer surfaces of the horizontal excitation coils and the outer surface of the crystallizer, vertical magnetic poles are arranged on the positions, above the horizontal magnetic poles, of the wide surface of the crystallizer, vertical excitation coils are arranged between the crystallizer and the vertical magnetic poles, the horizontal magnetic poles are not connected with the vertical magnetic poles, horizontal iron cores or vertical iron cores are arranged on the two groups of vertical magnetic poles, one end of an immersion type water opening is connected with a middle bag, and the other end of the immersiontype water opening extends into the crystallizer. The device is formed by combining one pair of horizontal magnetic poles and two pairs of vertical magnetic poles, and the current intensity applied bythe excitation coils on the three pairs of magnetic poles can be independently regulated and controlled according to the actual flowing state of the molten steel in the crystallizer.

Description

technical field [0001] The invention belongs to the technical field of continuous casting, and in particular relates to an independently adjustable combined electromagnetic brake device and method for controlling the flow of molten steel. Background technique [0002] In the continuous casting production process, after the high-temperature molten steel flows out from the side hole of the submerged nozzle, a high-speed jet with a certain angle impacts the narrow surface area of ​​the crystallizer, forming relatively high-speed upward and downward reflows. The molten steel flowing back up will impact the steel-slag interface in the mold, causing the fluctuation of the steel-slag interface, especially the fluctuation of the steel-slag interface near the meniscus on the side of the mold, which will easily cause the phenomenon of slag entrainment. The penetration depth of the molten steel reflowed downward is greater, and heterogeneous substances such as non-metallic inclusions a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/18B22D11/115
CPCB22D11/115B22D11/18
Inventor 李壮王恩刚马丹竹贾冯睿
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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