CN217142314U

CN217142314U - Tundish water feeding port

Info

Publication number: CN217142314U
Application number: CN202220508185.7U
Authority: CN
Inventors: 段少平; 周详; 赵新成; 皇甫江涛
Original assignee: Shaanxi Steel Group Hanzhong Iron and Steel Co Ltd
Current assignee: Shaanxi Steel Group Hanzhong Iron and Steel Co Ltd
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-08-09
Anticipated expiration: 2032-03-08

Abstract

The utility model discloses a tundish water feeding port, which comprises a zirconium core body, wherein an aluminum carbon matrix is fixedly arranged on the zirconium core body, a zirconium plate coaxial with the aluminum carbon matrix is fixedly arranged at the lower end of the zirconium core body, the zirconium plate buffers the scouring and erosion of molten steel on the zirconium core body, the molten steel is controlled to permeate between the zirconium core body and the matrix, and the service life of the zirconium core body is prolonged; the zirconium board includes the sandwich layer, first inoxidizing coating and second inoxidizing coating, and first inoxidizing coating is located the surface of sandwich layer, and the second inoxidizing coating is located the surface of first inoxidizing coating, the utility model discloses a set up first inoxidizing coating and second inoxidizing coating, can protect the surface of zirconium board, and then improve the life of zirconium board to possess the better advantage of anti erosion nature effect to the middle package mouth of a river, it is relatively poor to have solved traditional middle package mouth of a river anti erosion nature effect, causes the zirconium core to explode when using easily, and then influences middle package mouth of a river life problem.

Description

Tundish water feeding port

Technical Field

The utility model relates to a steel smelting refractory material technical field specifically is a tundish nozzle.

Background

The pouring period and the excess steel amount of a continuous casting tundish are important economic and technical indexes for measuring continuous casting production, at present, when large steel enterprises produce building steel, the casting speed of a continuous casting machine and the pouring period of the tundish are continuously improved, the number of times of replacing a ladle lining is reduced, the consumption of refractory materials is reduced, and the yield of metal is improved, so that the economic benefit is maximized.

The volume density of the zirconium core body of the traditional tundish upper nozzle is more than or equal to 5.4g/cm ³ The apparent porosity is less than 5.50, when the high-temperature molten steel is encountered, the molten steel is heated to burst, and along with the increase of the pouring period, the molten steel is eroded along the cracked part of the zirconium core, so that the pouring period of the water feeding port is influenced; the volume density of the zirconium core is less than 5.4g/cm ³ The apparent porosity is improved, the burst rate is reduced, but the erosion resistance intensity is reduced, the diameter expansion is serious, and the service life of the tundish is also influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a middle package mouth of a river possesses the better advantage of anti erosion nature effect to the middle package mouth of a river, and it is relatively poor to have solved traditional middle package mouth of a river anti erosion nature effect, causes the zirconium core to explode and splits easily when using, and then influences the problem of the life of the middle package mouth of a river.

In order to achieve the above object, the utility model provides a following technical scheme: a tundish water feeding port comprises a zirconium core body, wherein an aluminum-carbon matrix is fixedly mounted on the zirconium core body, a zirconium plate coaxial with the aluminum-carbon matrix is fixedly mounted at the lower end of the zirconium core body, the zirconium plate buffers the scouring and erosion of molten steel on the zirconium core body, the molten steel is controlled to permeate between the zirconium core body and the matrix, and the service life of the zirconium core body is prolonged; the zirconium plate comprises a core layer, a first protective layer and a second protective layer, wherein the first protective layer is located on the outer surface of the core layer, and the second protective layer is located on the outer surface of the first protective layer.

Preferably, the volume density parameter of the zirconium core body is as follows: 5.40g/cm ³ -5.45g/cm ³ Ensuring that the zirconium core has sufficient erosion resistance during casting.

Preferably, the volume density parameter of the zirconium plate is as follows: 5.30g/cm ³ -5.40g/cm ³ The zirconium plate is firstly contacted with high-temperature molten steel, so that the zirconium plate is ensured to have stronger anti-explosion performance.

Preferably, the first protective layer comprises a thermal insulation layer and an anticorrosion layer, the thermal insulation layer is located on the outer surface of the core layer, and the anticorrosion layer is located on the outer surface of the thermal insulation layer.

Preferably, the second protective layer comprises an anti-cracking layer and a high temperature resistant layer, the anti-cracking layer is located on the outer surface of the first protective layer, and the high temperature resistant layer is located on the outer surface of the anti-cracking layer.

Preferably, the thickness of insulating layer is 0.8mm, the thickness of anticorrosive coating is 0.6 mm.

Preferably, the thickness of the anti-cracking layer is 0.7mm, and the thickness of the high temperature resistant layer is 1 mm.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model constructs the tundish water inlet together by arranging the zirconium core body, the aluminum carbon matrix and the zirconium plate, buffers the scouring and erosion of molten steel on the zirconium core body through the zirconium plate, and controls the molten steel to permeate between the zirconium core body and the matrix; through setting up first inoxidizing coating and second inoxidizing coating, can protect the surface of zirconium board, and then improve the life of zirconium board, through setting up above structure, possess the better advantage of anti erosion nature effect to the middle package mouth of a river, it is relatively poor to have solved traditional middle package mouth of a river anti erosion nature effect, causes the zirconium core to explode and splits easily when using, and then influences the problem of the life of middle package mouth of a river.

Drawings

Fig. 1 is a schematic structural view of the front view of the present invention;

fig. 2 is a schematic sectional structural view of the present invention;

fig. 3 is a schematic front view of the zirconium core body of the present invention;

FIG. 4 is a partial cross-sectional view of a zirconium plate structure of the present invention;

fig. 5 is a partial cross-sectional view of a first protective layer structure of the present invention;

fig. 6 is a partial cross-sectional view of a second protective layer structure according to the present invention.

In the figure: 1. a zirconium core body; 2. an aluminum carbon matrix; 3. a zirconium plate; 31. a core layer; 32. a first protective layer; 321. a thermal insulation layer; 322. an anticorrosive layer; 33. a second protective layer; 331. an anti-cracking layer; 332. a high temperature resistant layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, a tundish nozzle comprises a zirconium core body 1, an aluminum-carbon matrix 2 is fixedly mounted on the zirconium core body 1, a zirconium plate 3 coaxial with the aluminum-carbon matrix 2 is fixedly mounted at the lower end of the zirconium core body 1 in a snap button and corundum refractory mortar mode, the zirconium plate 3 buffers the scouring and erosion of molten steel on the zirconium core body, and the molten steel is controlled to permeate between the zirconium core body 1 and the matrix 2, so that the service life of the zirconium core body 1 is prolonged.

Referring to fig. 3, 4 and 5, the zirconium plate 3 includes a core layer 31, a first protective layer 32 and a second protective layer 33, the first protective layer 32 is located on the outer surface of the core layer 31, the second protective layer 33 is located on the outer surface of the first protective layer 32, the zirconium core body 1, the aluminum carbon matrix 2 and the zirconium plate 3 are arranged to jointly construct a tundish water supply nozzle, and the first protective layer 32 and the second protective layer 33 are arranged to protect the outer surface of the zirconium plate 3, so that the service life of the zirconium plate 3 is prolonged.

Referring to fig. 4 and 5, the first protective layer 32 includes a thermal insulation layer 321 and an anti-corrosion layer 322, the thermal insulation layer 321 is a glass fiber thin film layer, the glass fiber has good insulation, heat resistance and corrosion resistance, the anti-corrosion layer 322 is a furan resin layer, the furan resin layer has outstanding alkali resistance, acid resistance, solvent resistance, heat resistance and other excellent properties, the thermal insulation layer 321 is located on the outer surface of the core layer 31, the anti-corrosion layer 322 is located on the outer surface of the thermal insulation layer 321, the thermal insulation of the zirconium plate 3 can be improved by the arrangement of the thermal insulation layer 321, the anti-corrosion of the zirconium plate 3 can be improved by the arrangement of the anti-corrosion layer 322, and the zirconium plate 3 is prevented from being damaged due to serious corrosion.

Referring to fig. 4 and 6, the second protective layer 33 includes a crack-resistant layer 331 and a high-temperature-resistant layer 332, the crack-resistant layer 331 is a fiber mesh coating, the fiber mesh is a glass fiber woven fabric as a base material, and is coated by a polymer emulsion-resistant immersion coating, and has good alkali resistance and flexibility, the high-temperature-resistant layer 332 is a ZrSiO 4-ZrO-based refractory layer, and the ZrSiO 4-ZrO-based refractory material has the advantages of high melting point, high thermal shock resistance and high temperature stability, and is not easily corroded by molten steel at high temperature, and the like, the crack-resistant layer 331 is located on the outer surface of the first protective layer 32, the high-temperature-resistant layer 332 is located on the outer surface of the crack-resistant layer 331, and by providing the crack-resistant layer 331, the crack resistance of the zirconium plate 3 can be improved, and the crack resistance of the zirconium plate 3 can be effectively avoided, and by providing the high-temperature-resistant layer 332, the high-temperature-resistant layer can improve the high-resistance of the zirconium plate 3.

Referring to fig. 1, 4 and 5, the thickness of the thermal insulation layer 321 is 0.8mm, and the thickness of the corrosion prevention layer 322 is 0.6 mm.

Referring to fig. 2, 4 and 6, the thickness of the anti-crack layer 331 is 0.7mm, and the thickness of the high temperature resistant layer 332 is 1 mm.

During the use, through zirconium core body 1, aluminium carbon matrix 2 and zirconium board 3, the middle package mouth of a river of feeding has been found jointly, through first inoxidizing coating 32 and second inoxidizing coating 33, can protect the surface of zirconium board 3, and then improve zirconium board 3's life, wherein insulating layer 321, can improve zirconium board 3's heat-proof quality, and anticorrosive coating 322, can improve zirconium board 3's corrosion resistance, avoid zirconium board 3 to damage because of corroding seriously, wherein crack resistance 331, can improve zirconium board 3's anti-cracking performance, the effectual zirconium board 3 that avoids produces burst, and high temperature resistant layer 332, can improve zirconium board 3's temperature-resistant high.

Through setting up above structure, through increase zirconium board 3 in zirconium core body 1 and aluminium carbon matrix 2 upper ends, slow down the molten steel to wash away and the etching of zirconium core body 1, control infiltration high temperature molten steel between zirconium core body 1 and the aluminium carbon matrix 2, possess the better advantage of anti etching nature effect to the middle package mouth of a river, it is relatively poor to have solved traditional middle package mouth of a river anti etching nature effect, cause the zirconium core to explode when using easily, and then the problem of the life of the mouth of a river is gone up to the influence middle package.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a middle package mouth of a river, includes zirconium core body (1), its characterized in that: the aluminum-carbon composite material is characterized in that an aluminum-carbon matrix (2) is fixedly mounted on the zirconium core body (1), and a zirconium plate (3) coaxial with the aluminum-carbon matrix (2) is fixedly mounted at the lower end of the zirconium core body (1).

2. A tundish upper nozzle according to claim 1, wherein: the zirconium plate (3) comprises a core layer (31), a first protective layer (32) and a second protective layer (33), wherein the first protective layer (32) is located on the outer surface of the core layer (31), and the second protective layer (33) is located on the outer surface of the first protective layer (32).

3. A tundish upper nozzle according to claim 2, wherein: the first protective layer (32) comprises a heat insulation layer (321) and an anticorrosive layer (322), the heat insulation layer (321) is located on the outer surface of the core layer (31), and the anticorrosive layer (322) is located on the outer surface of the heat insulation layer (321).

4. A tundish upper nozzle according to claim 2, wherein: the second protective layer (33) comprises an anti-cracking layer (331) and a high temperature resistant layer (332), wherein the anti-cracking layer (331) is positioned on the outer surface of the first protective layer (32), and the high temperature resistant layer (332) is positioned on the outer surface of the anti-cracking layer (331).