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Baking method and device for a submersed nozzle

A baking method and immersion technology, which is applied in the direction of casting molten material containers, metal processing equipment, casting equipment, etc., and can solve problems such as excessive baking, immersion nozzles that cannot meet the baking requirements, nozzle blockages, etc.

Active Publication Date: 2020-07-03
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a baking method and device for the submerged nozzle, which is used to solve the problem that the submerged nozzle in the prior art cannot meet the baking requirements during baking, resulting in overbaking , which leads to technical problems of nozzle blockage

Method used

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  • Baking method and device for a submersed nozzle
  • Baking method and device for a submersed nozzle
  • Baking method and device for a submersed nozzle

Examples

Experimental program
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Embodiment 1

[0028] This embodiment provides a baking method for a submerged nozzle, such as figure 1 As shown, the methods include:

[0029] S110. When using the baking equipment to bake the submerged nozzle once, control the gas flow rate in the baking equipment to be 10-20m 3 / h; one baking time is 30-35 minutes, and after one baking, the temperature of the submerged nozzle is 450-550°C;

[0030] The baking method of the present embodiment utilizes baking equipment to carry out, here, as figure 2 As shown, the baking equipment includes: a baking furnace body 1, a baking gun 2;

[0031] The baking furnace body 1 is a hollow cavity, and the upper part of the cavity is open; the baking gun 2 is arranged on the outside of the baking furnace body 1, and the baking gun 2 can be lifted vertically, and the output end of the baking gun 2 is located at The top of the top of the oven body 1 is baked.

[0032] The furnace bottom and furnace wall of the baking furnace body 1 are composed of an ...

Embodiment 2

[0053] This embodiment provides a baking device, such as image 3 As shown, the device includes: a first control unit 31, a second control unit 32, and a third control unit 33; wherein,

[0054] The first control unit 31 is used to control the gas flow rate in the baking equipment to be 10-20m when using the baking equipment to bake the submerged nozzle once. 3 / h; one baking time is 30-35 minutes, and after one baking, the temperature of the submerged nozzle is 450-550°C;

[0055] The second control unit 32 is used to control the gas flow in the baking equipment to be 30-50 m when the submerged nozzle is baked for the second time after the first baking. 3 / h; the secondary baking time is 25-30min, and after the secondary baking, the temperature of the submerged nozzle is 1200-1250°C;

[0056] The third control unit 33 is configured to control the third baking time to be 30-60 minutes when baking the submerged nozzle three times after the second baking.

[0057] The roastin...

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Abstract

The invention provides a baking method and device for a submersed nozzle. The baking method comprises the steps that when primary baking is conducted on the submersed nozzle, the gas flow in baking equipment is controlled to be 10-20m <3> / h; the primary baking time is 30-35min, and the temperature of the baked nozzle is 450-550 DEG C; and when secondary baking is conducted on the nozzle, the gasflow in the baking equipment is controlled to be 30-50m <3> / h; the secondary baking time is 25-30min, and the temperature of the secondary baked submersed nozzle is 1200-1250 DEG C; and when tertiarybaking is conducted on the nozzle, the tertiary baking time is controlled to be 30-60min. In the abovementioned way, in the primary baking process, small fire is utilized for baking, and internal cracking caused by the too high heating speed is prevented; and in the secondary baking process, the firepower is increased, the situation that the refractory material of the nozzle is oxidized and loosened due to long-time small fire baking of the nozzle is prevented, then the inner wall of the nozzle is prevented from generating glaze removal, and finally the situation that impurities in molten steel are adsorbed to the inner wall of the nozzle, and consequently the nozzle is blocked is avoided.

Description

technical field [0001] The invention belongs to the technical field of continuous casting, and in particular relates to a baking method and device for a submerged nozzle. Background technique [0002] The blockage of the nozzle can lead to the asymmetric flow of molten steel in the flow field in the mold, which will affect the fluctuation of the liquid level, cause the occurrence of slag entrainment defects, and then affect the quality of the slab. The clogging of the nozzle is related to many process factors, such as: the cleanliness of molten steel, the material of the nozzle, the roughness inside the nozzle and a series of factors. [0003] When the nozzle is blocked, the operation of changing the nozzle can only be adopted. The operation of changing the nozzle is to reduce the pulling speed, and the operator installs a new nozzle after baking, and then increases the pulling speed to a normal level. Excessive baking of the nozzle will cause deglazing, oxidative decarburi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/60
CPCB22D41/60
Inventor 罗衍昭季晨曦何文远江俊敏张宏艳关顺宽杨晓山刘延强张志敏王胜东杨敬铭潘宏伟杨春宝曾智安泽秋赵长亮
Owner SHOUGANG CORPORATION