Continuous casting tundish protecting technology

Abstract

The invention discloses a continuous casting tundish protecting technology and relates to the field of steelmaking technologies. The continuous casting tundish protecting technology comprises the following steps that a, a tundish is baked at a baking position and moved to a pouring position after being baked; b, a protecting sleeve immersed into molten steel in a crystallizer is mounted at a tundish sliding water gap in the lower end of the tundish; c, the molten steel is poured into the tundish through a ladle; and d, the molten steel in the tundish is poured into the crystallizer by the protecting sleeve. The protecting sleeve is replaced on time, when the protecting sleeve is replaced, the liquid level of the molten steel in the crystallizer is lowered through manual operation of a casting speed disc, and after the protecting sleeve is replaced, the liquid level of the molten steel in the crystallizer is heightened through manual operation of the casting speed disc. According to thecontinuous casting tundish protecting technology, the protecting sleeve is replaced in time, so that the phenomena of damage to the protecting sleeve and fracturing or falling blocks of the protecting sleeve due to long-time high-temperature pouring are avoided, the situation that the falling blocks and the like at the protecting sleeve fall into the crystallizer is avoided, and slag inclusion ina continuous cast billet in the continuous casting tundish protecting technological process is avoided.

Description

technical field

[0001] The invention relates to the field of steelmaking technology, in particular to a tundish protection technology. Background technique

[0002] In the continuous casting process, there will be slag inclusions in the continuous casting slab during the steel drawing process, and then the initial rolling broken material will be formed in the steel rolling, which will eventually cause losses. The tundish is a refractory container, and the molten steel poured from the ladle is distributed to each crystallizer through the nozzle of the tundish. From the perspective of improving economic benefits and reducing energy consumption, it is necessary to propose some measures to improve the continuous casting tundish protection process. The main causes of slag inclusion and broken material in the initial rolling include: the temperature of the molten steel in the tundish is too high; When protecting the casing, the protective casing breaks or falls off; the insertio...

Examples

Embodiment Construction

[0025] Below in conjunction with embodiment the present invention is described in further detail:

[0026] Such as figure 1 As shown, a continuous casting tundish protection process includes the following steps:

[0027] a. Move the tundish 1 to the baking position, bake the tundish 1, move to the pouring position after baking, stop the fire of the toaster, lay a layer of slag cotton on the tundish along the edge, check the tundish body and Whether there is a gap between the covers, cover the cover of the tundish 1 on the upper edge of the package body of the tundish 1, and apply a sealing paint between the cover of the tundish 1 and the package body of the tundish 1;

[0028] b. Install a protective sleeve 2 immersed in molten steel in the crystallizer at the sliding nozzle 5 of the tundish at the lower end of the tundish 1;

[0029] c. The ladle is placed on the rotary table, the ladle is poured, and molten steel is injected from the ladle into the tundish 1, and the molte...

technical field

[0001] The invention relates to the field of steelmaking technology, in particular to a tundish protection technology. Background technique

[0002] In the continuous casting process, there will be slag inclusions in the continuous casting slab during the steel drawing process, and then the initial rolling broken material will be formed in the steel rolling, which will eventually cause losses. The tundish is a refractory container, and the molten steel poured from the ladle is distributed to each crystallizer through the nozzle of the tundish. From the perspective of improving economic benefits and reducing energy consumption, it is necessary to propose some measures to improve the continuous casting tundish protection process. The main causes of slag inclusion and broken material in the initial rolling include: the temperature of the molten steel in the tundish is too high; When protecting the casing, the protective casing breaks or falls off; the insertio...

Examples

Embodiment Construction

[0025] Below in conjunction with embodiment the present invention is described in further detail:

[0026] Such as figure 1 As shown, a continuous casting tundish protection process includes the following steps:

[0027] a. Move the tundish 1 to the baking position, bake the tundish 1, move to the pouring position after baking, stop the fire of the toaster, lay a layer of slag cotton on the tundish along the edge, check the tundish body and Whether there is a gap between the covers, cover the cover of the tundish 1 on the upper edge of the package body of the tundish 1, and apply a sealing paint between the cover of the tundish 1 and the package body of the tundish 1;

[0028] b. Install a protective sleeve 2 immersed in molten steel in the crystallizer at the sliding nozzle 5 of the tundish at the lower end of the tundish 1;

[0029] c. The ladle is placed on the rotary table, the ladle is poured, and molten steel is injected from the ladle into the tundish 1, and the molte...

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