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Side-wall type tundish induction heating and mixing technical method

A technology of induction heating and process method, which is applied in the field of metallurgy, can solve problems such as unsuitable tundish, achieve stable and uniform temperature, improve cleanliness, and increase average residence time

Active Publication Date: 2016-06-15
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to cost factors, most domestic steel manufacturers still use ordinary tundishes as the main products, while single-channel, double-channel and three-channel induction heating in the package are not suitable for this traditional tundish.

Method used

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  • Side-wall type tundish induction heating and mixing technical method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A process method for sidewall induction heating and stirring tundish, which is carried out according to the following process steps:

[0037] (1) Fix the U-shaped iron core wound with the coil on the wide surface C of the side wall of the tundish, such as figure 1 As shown, the coil is fed with alternating current, and the frequency of the control current is 50Hz;

[0038] (2) Adjust the heating power of the induction coil to 400KW, so that the temperature of the 80 steel molten steel in the tundish is maintained at the casting temperature of 1535°C, and the molten steel rotates while flowing under the action of the alternating magnetic field;

[0039] (3) Introduce the heated molten steel into the continuous casting process.

[0040] In this embodiment, the wall of the tundish A is provided with a feed inlet, and the nozzle is arranged on the bottom surface. This design method can give full play to the heating and stirring functions of the induced magnetic field, and ...

Embodiment 2

[0046]A process method for sidewall induction heating and stirring tundish, which is carried out according to the following process steps:

[0047] (1) Fix the two U-shaped iron cores wound around the coil on the opposite sides of the wide surface C and C of the side wall of the tundish respectively, such as Figure 6 As shown, the coil is fed with alternating current, and the frequency of the control current is 100Hz;

[0048] (2) Adjust the heating power of the induction coil to 1000KW, so that the temperature of the 75 steel molten steel in the tundish is maintained at the casting temperature of 1535°C, and the molten steel rotates while flowing under the action of the alternating magnetic field;

[0049] (3) Introduce the heated molten steel into the continuous casting process.

[0050] Figure 7 The temperature change curve at the two nozzles of the tundish under the heating power of 1000KW in this embodiment is provided. It can be seen from the figure that under this p...

Embodiment 3

[0052] A process method for sidewall induction heating and stirring tundish, which is carried out according to the following process steps:

[0053] (1) Fix the E-shaped iron core wound with the coil on the wide surface C of the side wall of the tundish, such as Figure 8 As shown, the coil is fed with alternating current, and the frequency of the control current is 80Hz;

[0054] (2) Adjust the heating power of the induction coil to 800KW, so that the temperature of the 85 steel molten steel in the tundish is maintained at the casting temperature of 1535°C, and the molten steel rotates while flowing under the action of the alternating magnetic field;

[0055] (3) Introduce the heated molten steel into the continuous casting process.

[0056] Figure 9 The temperature change curve at the two nozzles of the tundish under the heating power of 800KW is provided in this embodiment. As can be seen from the figure, under this power, the temperature drop of the molten steel in the ...

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Abstract

The invention provides a side-wall type tundish induction heating and mixing technical method. The side-wall type tundish induction heating and mixing technical method includes the technical steps that (1) an iron core wound with a coil is fixed to the side wall of a tundish, the coil is charged with alternating currents, and the current frequency is controlled to be 20-500 Hz; (2) the heating power of the induction coil is adjusted to maintain the temperature of molten steel in the tundish at the casting temperature, and the molten steel makes rotating motion while flowing under the action of an alternating magnetic field; and (3) new molten steel is introduced into the tundish while the heated molten steel is introduced to the next procedure, and the step (2) is conducted repeatedly. The electromagnetic induction heating method has the advantages of being high in heating efficiency, good in heating response and controllability, free of pollution to metal melt and high in security.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a process method for side wall induction heating and stirring tundish. Background technique [0002] The tundish is an intermediate container connecting the ladle and the crystallizer in the continuous casting process. Tundish metallurgy is a special refining technology outside the furnace, which is the key link to obtain high-quality continuous casting slabs. [0003] In the process of steelmaking and casting, the temperature of molten steel is one of the important parameters that affect the smoothness of continuous casting and the quality of billets. If the molten steel temperature is too low, it is easy to cause blockage of the nozzle, stop casting, and affect the production progress of the billet; internal quality. The molten steel temperature fluctuates greatly during the ladle changing process, and the molten steel temperature will be lost to a certain ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/115
CPCB22D11/115
Inventor 邓安元李阳李培栋陈圆圆李亮王恩刚
Owner NORTHEASTERN UNIV