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A channel type induction heating tundish and casting method thereof

A technology of induction heating and casting method, applied in casting equipment, metal processing equipment, casting melt container, etc., can solve the problems of freezing in the immersion nozzle, serious segregation, increase of inclusion defects in continuous casting billets, etc., and achieve stable Flow state, the effect of alleviating scour

Active Publication Date: 2017-04-05
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the superheat of molten steel is reduced to a certain temperature, the inclusion defects of the continuous casting slab will be greatly increased by factors including the slag brought into the molten steel; if the superheat of molten steel continues to decrease, the molten steel may freeze in the submerged nozzle. , on the contrary, if the superheat of molten steel is too high, non-equiaxed coarse-grained structure will be formed in the slab, and the segregation is serious

Method used

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  • A channel type induction heating tundish and casting method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] After the ladle is poured, the superheat of the molten steel is 45 degrees, and the molten steel enters the tundish steel cavity 101 from the long nozzle 5, and enters the tundish steel cavity 102 through the channel 103; after 3 minutes, the tundish steel cavity 101 and the steel cavity Mold slag is put into cavity 102 to form slag layer 104; molten steel pouring flow rate is 0.3t / min, open gas blowing pipe 4 at the bottom of the tundish, and blow in argon gas, and the flow rate of argon gas is controlled at 0.2NM 3 / h. Turn on the induction heater 3 to heat the molten steel in the channel 103. After 20 minutes, the continuous casting enters the tail stock, stop the induction heater 3 for heating, close the nozzle 6 stopper on the side of the pouring cavity 102, and the casting ends.

Embodiment 2

[0035]After the ladle is poured, the superheated degree of molten steel is 30 degrees. After 5 minutes, mold slag is put into the tundish bearing cavity and pouring cavity respectively to form a slag layer; Trachea, blowing argon, the flow of argon is controlled at 0.5NM 3 / h. Turn on the induction heater to heat the molten steel in the channel. After 30 minutes, the continuous casting enters the tail blank, stop the induction heater to heat, turn off the stopper, and the casting ends.

Embodiment 3

[0037] After the ladle is poured, the superheated degree of the molten steel is 35 degrees. After 6 minutes, pour mold slag into the steel chamber of the tundish and the pouring chamber respectively to form a slag layer; the pouring flow rate of the molten steel is 2t / min, and the blowing pipe at the bottom of the tundish is opened , blowing argon, the flow of argon is controlled at 1NM 3 / h. Turn on the induction heater to heat the molten steel in the channel. After 35 minutes, the continuous casting enters the tail blank, stop the induction heater to heat, turn off the stopper, and the casting ends.

[0038] The tundish is widely used in the production process of the continuous casting process. The present invention can be applied to the structural design of various tundishes, which can greatly remove the content of inclusions in molten steel and increase the purity of molten steel in molten steel, thereby achieving stable pouring the goal of.

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Abstract

The invention discloses a channel type induction heating pouring basket and a pouring method thereof. The channel type induction heating pouring basket comprises a pouring basket body, an induction heater and at least two air blowing pipes, wherein the inner part of the pouring basket body is separated into a molten steel containing cavity which is used for receiving large-basket molten steel and a molten steel pouring cavity which is used for pouring the molten steel by a refractory material, and at least two channels which are used for communicating the molten steel containing cavity with the molten steel pouring cavity are arranged in the lower part of the refractory material in parallel; the height of each channel is lower than 1 / 3 of the height of an inner cavity of the pouring basket body; an induction coil of the induction heater is arranged between the two channels in a penetrating way; the at least air blowing pipes are arranged in the refractory material of the pouring basket body, and outlets of the at least two air blowing pipes are correspondingly formed in inlet ends, which are positioned at the side of the molten steel cavity, of the channels. The channel type induction heating pouring basket disclosed by the invention can be applied to a continuous pouring whole process for removing impurities and enabling the temperature of the molten steel to be uniform.

Description

technical field [0001] The invention relates to the field of continuous casting, in particular to a channel-type induction heating tundish and a casting method thereof. Background technique [0002] In the initial stage of the development of continuous casting steel technology, the tundish was only used as a storage and distributor of molten steel. With the development of continuous casting technology and the continuous improvement of the quality requirements of casting slabs, the importance of molten steel quality to continuous casting technology has gradually been recognized by people. In order to ensure the smooth running of the continuous casting process and the continuous casting of multiple furnaces, it is necessary to ensure that the molten steel has sufficient purity, control the composition range of the molten steel as precisely as possible, and maintain a stable temperature and superheat of the molten steel for a long enough time . Therefore, as the last refracto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/01B22D11/18
Inventor 任三兵樊俊飞方园于艳
Owner BAOSHAN IRON & STEEL CO LTD
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