A vertical electromagnetic braking device for controlling the flow of molten steel in a continuous casting mold

A technology of continuous casting crystallizer and electromagnetic braking, which is applied in the field of continuous casting to achieve the effect of improving quality

Active Publication Date: 2017-10-31
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • A vertical electromagnetic braking device for controlling the flow of molten steel in a continuous casting mold
  • A vertical electromagnetic braking device for controlling the flow of molten steel in a continuous casting mold
  • A vertical electromagnetic braking device for controlling the flow of molten steel in a continuous casting mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] In this example, using figure 1 In the vertical electromagnetic braking device shown, the vertical magnetic pole 3 and the horizontal magnetic pole 1 adopt the connection method in Figure 3(a), and the vertical magnetic pole 3 covers the side of the mold 7 in height from the molten steel surface 6 area to the intrusive nozzle 4 The impact point of the molten steel and the area below the horizontal magnetic pole 1, the cross-sectional size of the crystallizer 7 is 300mm×50mm, and the height of the vertical magnetic pole 3 is 240mm.

[0088] The currents of 700A and 1050A are respectively applied to the excitation coil 2 of the horizontal magnetic pole 1, and the magnetic field distribution diagram of the vertical magnetic pole center along the height direction of the center section of the side of the crystallizer is shown as Figure 7 shown.

[0089] Depend on Figure 7 It can be seen that with the increase of current intensity, the magnetic induction intensity gradual...

Embodiment 2

[0091] In this example, using figure 1 In the vertical electromagnetic braking device shown, in order to observe the fluctuation of the liquid level in the crystallizer 7 more intuitively, the test object is the metal liquid of the low melting point alloy SnPbBi; the vertical magnetic pole 3 and the horizontal magnetic pole 1 adopt the Connection method, the vertical magnetic pole 3 covers the side of the mold 7 in height, from the molten steel surface 6 area to the impact point of the intrusive nozzle 4 outflowing molten steel and the area under the horizontal magnetic pole 1, the thickness of the mold 7 is 100mm, and the mold The half width of 7 is 600mm, the height of vertical magnetic pole 3 is 440mm, the inclination angle of the side hole of intrusive nozzle 4 is -15°, the intrusion depth of intrusive nozzle 4 is 100mm, and the casting speed is 1.27m / min.

[0092] Apply current to the excitation coil 2 of the horizontal magnetic pole 1, so that a magnetic field of about 0...

Embodiment 3

[0095] In this example, using figure 1 In the vertical electromagnetic braking device shown, the vertical magnetic pole 3 and the horizontal magnetic pole 1 adopt the connection method in Figure 3(c), then the height of the vertical magnetic pole 3 below the horizontal magnetic pole 1 is 0mm, and the vertical magnetic pole 3 covers the height The side of the mold 7 is from the area 6 of the molten steel surface to the impact point of the molten steel flowing out of the intrusive nozzle 4 and the area above the horizontal magnetic pole 1. The cross-sectional size of the mold 7 is 1400mm×230mm, and the inclination angle of the side hole of the intrusive nozzle 4 is - 15°, the penetration depth of the intrusive nozzle 4 is 170mm, and the casting speed is 1.6m / min.

[0096] A current of 850A is applied to the excitation coil 2 of the horizontal magnetic pole 1, and the internal magnetic field distribution diagram of the molten steel in the mold 7 is as follows Figure 9 As shown ...

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Abstract

A vertical electromagnetic braking device for controlling the flow of molten steel in a continuous casting crystallizer, including a horizontal magnetic pole, an excitation coil, a vertical magnetic pole and a magnetic yoke; there are two pairs of vertical magnetic poles, and one or two pairs of horizontal magnetic poles; When there is one pair of horizontal magnetic poles, they are located below the intrusive nozzle and arranged along the wide surface of the mold; Surface layout, the upper horizontal magnetic pole is located near the surface of the molten steel in the mold and arranged along the wide surface of the mold; two pairs of vertical magnetic poles are respectively arranged near the two sides of the mold and intersect with one or two pairs of horizontal magnetic poles; excitation coil And the magnetic yoke are equipped with the horizontal magnetic pole, and the current is applied through the excitation coil to generate a steady magnetic field between the horizontal magnetic pole and the vertical magnetic pole. Electromagnetic force controls the flow of molten steel in the mold through 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/16B22D11/11
CPCB22D11/11B22D11/16B22D11/115B22D11/186B22D11/18
Inventor 王恩刚李壮许琳李菲邓安元张兴武张林
Owner NORTHEASTERN UNIV LIAONING
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