CN215919073U

CN215919073U - Anti-erosion tundish

Info

Publication number: CN215919073U
Application number: CN202122194111.9U
Authority: CN
Inventors: 郭鹏; 周玉; 吕纪丞; 王健; 张传硕; 滕昕
Original assignee: Rizhao Taidong Charge Co ltd
Current assignee: Rizhao Taidong Charge Co ltd
Priority date: 2021-09-11
Filing date: 2021-09-11
Publication date: 2022-03-01
Anticipated expiration: 2031-09-11

Abstract

An anti-erosion tundish relates to the technical field of refractory materials for steelmaking, in particular to an anti-erosion tundish. The tundish comprises a tundish shell, wherein the tundish shell is of a shell structure with an opening at the upper end, a permanent lining pouring layer is arranged on the inner wall of the tundish shell, and a working lining dry layer is arranged on the inner wall of the permanent lining pouring layer; the firebrick body is formed by pressing a magnesium-carbon synthetic material, and the periphery of the firebrick body is filled with a dry ramming material. The utility model can improve the density of the brick body, strengthen the performance of steel slag erosion resistance and molten steel erosion resistance of the working lining dry layer in the impact area, and has the positive effects of improving the quality of molten steel and improving the smelting efficiency.

Description

Anti-erosion tundish

Technical Field

The utility model relates to the technical field of refractory materials for steelmaking, in particular to an anti-corrosion tundish.

Background

Iron and steel is an important basic raw material, and plays a very important role in economic development of various countries in the world. The tundish is a refractory vessel used in short-run steelmaking, and receives molten steel poured from a ladle first, and then distributes the molten steel to each crystallizer through a tundish nozzle. In the process of continuously casting steel in the tundish for a long time, the dry material of the working lining dry-type layer slag line in the impact area is corroded by steel slag and is seriously scoured by molten steel, the phenomenon that the working lining dry-type layer penetrates steel to a permanent layer occurs, and the problem is a bottleneck limiting the service life of the whole tundish.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an anti-erosion tundish, so as to achieve the aims of enhancing the steel slag erosion resistance and the molten steel erosion resistance of a working lining dry layer in an impact area and improving the smelting efficiency.

The anti-erosion tundish provided by the utility model comprises a tundish shell, wherein the tundish shell is of a shell structure with an opening at the upper end, a permanent lining pouring layer is arranged on the inner wall of the tundish shell, and a working lining dry layer is arranged on the inner wall of the permanent lining pouring layer; the firebrick body is formed by pressing a magnesium-carbon synthetic material, and the periphery of the firebrick body is filled with a dry ramming material.

Further, a current stabilizer is arranged at the inlet end of the tundish shell.

Furthermore, the anti-corrosion layer is arranged on the periphery of the inlet end of the tundish shell and on the inner wall of the working lining dry layer at the bottom corresponding to the inlet end.

Furthermore, a hole type water gap is arranged on the tundish shell.

Furthermore, the firebrick body is formed by bonding, pressing and molding the magnesium-carbon synthetic material by phenolic resin.

Further, the volume density of the firebrick body is more than 2.9g/cm for high speed cultivation.

Furthermore, the firebrick body is a cuboid structure with the thickness of 250mm multiplied by 200mm multiplied by 35 mm.

According to the anti-erosion tundish provided by the utility model, the anti-erosion layer is arranged in the impact area of the inner wall of the dry layer of the working lining, the anti-erosion layer is formed by laying firebrick bodies, the firebrick bodies are formed by pressing magnesium-carbon composite materials, and dry ramming materials are filled in gaps among the firebrick bodies. The firebrick body can ensure that the continuous casting time of the tundish reaches more than 40 hours, obviously enhances the steel slag erosion resistance and the molten steel erosion resistance of the dry-type working lining layer of the impact area, and well solves the bottleneck of the service life of the tundish. The dry ramming mass resists the erosion of molten steel and slag in the use process and has long service life. Meanwhile, the dry ramming mass can ensure that the working layer and the permanent lining are not easy to sinter, the slag is convenient to remove, the ladle is easy to turn over, and the dry ramming mass can purify molten steel and improve the quality of the molten steel. Therefore, the utility model can improve the density of the brick body, strengthen the performance of resisting steel slag erosion and molten steel scouring of the dry layer of the working lining in an impact area, and has the positive effects of improving the quality of the molten steel and improving the smelting efficiency.

Drawings

The accompanying drawings disclose, in part, specific embodiments of the present invention, wherein,

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2, a schematic view of the structure at A of the present invention;

FIG. 3 is a schematic view of the structure of the firebrick body of the present invention.

Detailed Description

As shown in fig. 1-3, the anti-erosion tundish provided by the utility model comprises a tundish shell 1 and a tundish impact barrel 2, wherein the tundish shell 1 is of a shell structure with an opening at the upper end, a permanent lining casting layer 3 is arranged on the inner wall of the tundish shell 1, a working lining dry layer 4 is arranged on the inner wall of the permanent lining casting layer 3, an anti-erosion layer 5 is arranged in an impact area of the inner wall of the working lining dry layer 4, and the anti-erosion layer 5 is formed by laying firebrick bodies 6; the firebrick body 6 is pressed and formed by magnesium-carbon synthetic material, and the periphery of the firebrick body 6 is filled with dry ramming material 7.

In use, the present invention is first used to manufacture a firebrick body 6. The traditional pouring forming is changed into pressing forming, the pressing forming is carried out by a 600-700 ton electric screw press, the pressing tonnage is about 400-500 ton, the pressing tonnage is 4-6 tons, and the volume density of the firebrick body 6 can be kept above 2.9g/cm for thin year. Then, a dry ramming mass 7 and a firebrick body 6 are laid on the inner wall of the working lining dry layer 4 of the impact area in the tundish shell 1 to form an anti-erosion layer 5. Finally, in the process of pouring steel in a tundish for long-time continuous casting, the anti-erosion layer 5 formed by the firebrick body 6 and the anti-erosion layer 5 can enhance the steel slag erosion resistance and the molten steel erosion resistance of the working lining dry layer in the impact area, improve the quality of the molten steel and improve the smelting efficiency.

The inlet end of the tundish shell 1 is provided with a current stabilizer 2. The flow stabilizer 2 can improve the flowing state of the molten steel, slow down the erosion and the scouring of the molten steel to the dry layer of the tundish working lining, and improve the quality of the molten steel and the smelting efficiency.

The anti-corrosion layer 5 is arranged on the periphery of the inlet end of the tundish shell 1 and on the inner wall of the working lining dry layer 4 at the bottom corresponding to the inlet end. If the diameter of the inlet end of the tundish shell 1 is 60cm, the working lining dry layer 4 at the inlet end of the tundish shell 1, around 60cm from the inlet end and at the bottom 150cm from the inlet end is an anti-erosion layer 5. The erosion resistant layer 5 is positioned in a region which is seriously eroded by steel slag and scoured by molten steel in the long-time continuous casting steel casting process of the tundish, can enhance the steel slag erosion resistance and the molten steel erosion resistance of the working lining dry layer in an impact region, and improves the smelting efficiency.

The tundish shell 1 is provided with the hole type water gap 8, so that secondary oxidation and molten steel splashing of tundish injection flow can be prevented, and the quality and smelting efficiency of the molten steel are improved.

The firebrick body 6 is formed by bonding, pressing and molding a magnesium-carbon synthetic material by phenolic resin. Adopt material and water to stir the mixture than traditional brick, the phenolic resin adhesive is inside to be the network state under high temperature toasts, closely lets the bonding of magnesium carbon synthetic material to promote bulk density, can make the bulk density of firebrick brick body be greater than 2.9g/cm year, strengthen the ability that the steel slag that strikes district work lining dry-type layer corrodes and resists molten steel and erode.

The firebrick body 6 is a cuboid structure with the thickness of 250mm multiplied by 200mm multiplied by 35mm, and the firebrick body 6 is laid on the erosion resistant layer 5, so that the steel slag erosion resistance and the molten steel erosion resistance of the dry layer of the working lining in the impact area can be enhanced, and the smelting efficiency is improved.

Claims

1. An anti-erosion tundish comprises a tundish shell (1), wherein the tundish shell (1) is of a shell structure with an opening at the upper end, a permanent lining pouring layer (3) is arranged on the inner wall of the tundish shell (1), and a working lining dry layer (4) is arranged on the inner wall of the permanent lining pouring layer (3), and the anti-erosion tundish is characterized in that an anti-erosion layer (5) is arranged in an impact area of the inner wall of the working lining dry layer (4), and the anti-erosion layer (5) is formed by laying refractory brick bodies (6); the firebrick body (6) is formed by pressing a magnesium-carbon synthetic material, and the periphery of the firebrick body (6) is filled with a dry ramming material (7).

2. An erosion resistant tundish according to claim 1, wherein the inlet end of the tundish housing (1) is provided with a flow stabilizer (2).

3. An erosion resistant tundish according to claim 1, wherein the erosion resistant layer (5) is provided around the inlet end of the tundish housing (1) and on the inner wall of the working lining dry layer (4) at the bottom of the tundish housing corresponding to the inlet end.

4. An erosion resistant tundish according to claim 1, wherein the tundish shell (1) is provided with a port nozzle (8).

5. The anti-erosion tundish according to claim 1, wherein the firebrick body (6) is formed by pressing a magnesia carbon composite material bonded with a phenolic resin.

6. The erosion resistant tundish according to claim 1, wherein the firebrick body (6) is flash rolled at a bulk density of greater than 2.9 g/cm.

7. The erosion resistant tundish according to claim 1, wherein the firebrick body (6) is a rectangular parallelepiped structure of 250mm x 200mm x 35 mm.