CN210702513U

CN210702513U - Large-scale anti-burst ladle bottom impact area prefabricated part

Info

Publication number: CN210702513U
Application number: CN201921529561.5U
Authority: CN
Inventors: 孙枫; 王志强; 蔡长秀; 雷中兴; 彭肖仟; 刘毅; 姚亚双
Original assignee: Wuhan Iron And Steel Group Refractory Materials Co ltd
Current assignee: Wuhan Iron And Steel Group Refractory Materials Co ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-06-09
Anticipated expiration: 2029-09-12

Abstract

The utility model discloses a large-scale anti-burst ladle bottom impact area prefab, including prefabricated section and exhaust medium, the prefabricated section is equipped with a plurality ofly, be equipped with the exhaust medium between a plurality of prefabricated sections, the melting point of exhaust medium is far less than the prefabricated section, the exhaust medium leaves exhaust passage after toasting the in-process and melting. The utility model has the advantages that: the production process is simple, and the problem that the product bursts in the baking process is thoroughly solved from the angle of reducing the extremely high steam pressure generated inside the large prefabricated part in the baking process.

Description

Large-scale anti-burst ladle bottom impact area prefabricated part

Technical Field

The utility model relates to a steel smelting ladle auxiliary structure technical field specifically indicates a striking district prefab at bottom of large-scale anti-burst ladle.

Background

In the steelmaking process, the ladle is not only a transfer container between the converter and the continuous casting, but also a secondary refining process. The secondary refining comprises the processes of molten steel deoxidation, molten steel homogenization, molten steel alloying, molten steel desulphurization, molten steel temperature regulation, molten steel decarburization, non-metallic inclusion change in molten steel, final steel slag change and formation and the like, and all the processes are carried out in a steel ladle, so the secondary refining is also called steel ladle refining. The bottom of the ladle is not only subjected to the strong impact force of the molten steel from the converter, but also receives the erosion effect of the steel slag brought by the steel tapping of the converter and the steel slag after casting.

In recent years, the bottoms of many large and medium-sized ladles are built by combining impact zone prefabricated members and bottom castable, wherein the impact zone prefabricated members are arranged for receiving molten steel impact, and the area of the impact zone prefabricated members is about 2-3m²The thickness of the large-scale prefabricated part is 250-400mm, and the large-scale prefabricated part belongs to a large-scale prefabricated part. The large prefabricated member is generally formed by pouring corundum or corundum plus spinel with water, the structure is very compact, the steam pressure at the center of the prefabricated member rises exponentially along with the rise of temperature in the baking process, and when the limit of the steam pressure which can be borne by the prefabricated member is lower than the steam pressure at the center, the prefabricated member can burst.

Disclosure of Invention

The utility model aims at solving the above problem, providing a striking district prefab at bottom of large-scale anti-burst ladle, its production process is simple, from reducing large-scale prefab and toasting the angle that the in-process inside produced high steam pressure, thoroughly solves this product and toasts the problem that the in-process appears bursting.

In order to realize the purpose, the utility model relates to a large-scale anti-burst ladle bottom impact area prefab, including prefabricated section and exhaust medium, the prefabricated section is equipped with a plurality ofly, be equipped with the exhaust medium between a plurality of prefabricated sections, the melting point of exhaust medium is far less than the prefabricated section, the exhaust medium leaves exhaust passage after melting in the baking process.

Further, horizontally-arranged exhaust media are arranged between the two vertically-adjacent precast blocks, vertically-arranged exhaust media are arranged between the two horizontally-adjacent precast blocks, and the horizontally-arranged and vertically-arranged exhaust media form a grid shape, so that the exhaust media can be quickly discharged after being melted in the baking process, and an exhaust channel is reserved.

Preferably, the relationship between the interval L of the vertical arrangement of the exhaust media and the total length L is as follows: when L > 1.5m, L ═ 1/4L; when the m is less than or equal to 1.5m, L is 1/3L.

Preferably, the relationship between the transverse arrangement distance H of the exhaust media and the total height H is as follows: h is 1/2H.

Preferably, the exhaust medium is a paraffin rope, a polyethylene plastic rope or a polystyrene plastic rope.

The utility model has the advantages that: the production process is simple, and the problem that the product bursts in the baking process is thoroughly solved from the angle of reducing the extremely high steam pressure generated inside the large prefabricated part in the baking process.

Drawings

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

FIG. 2 is a schematic cross-sectional view taken at A-A of FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 2;

FIG. 4 is an enlarged schematic view of the vent passage at B in FIG. 3 after the venting medium is melted;

FIG. 5 is a schematic size diagram of FIG. 2;

in the figure: prefabricated section 1, exhaust medium 2, exhaust passage 3.

Detailed Description

The invention will be described in further detail with reference to the following figures and specific embodiments:

the prefabricated member for the large-scale anti-burst steel ladle bottom impact area as shown in fig. 1-5 comprises a plurality of prefabricated blocks 1 and exhaust mediums 2, wherein the exhaust mediums 2 are arranged among the prefabricated blocks 1, the melting point of the exhaust mediums 2 is far lower than that of the prefabricated blocks 1, and the exhaust passages 3 are left after the exhaust mediums 2 are melted in the baking process. The exhaust medium 2 which is horizontally arranged is arranged between the two vertically adjacent precast blocks 1, the exhaust medium 2 which is vertically arranged is arranged between the two horizontally adjacent precast blocks 1, and the exhaust medium 2 which is horizontally and vertically arranged is in a grid shape, so that the exhaust medium can be quickly discharged after being melted in the baking process, and an exhaust channel 3 is reserved. The relationship between the vertical arrangement distance L of the exhaust media 2 and the total length L is as follows: when L > 1.5m, L ═ 1/4L; when the m is less than or equal to 1.5m, L is 1/3L. The relationship between the transverse arrangement distance H and the total height H of the exhaust medium 2 is as follows: h is 1/2H. The exhaust medium 2 is a paraffin rope, a polyethylene plastic rope or a polystyrene plastic rope.

In actual use:

the length L of the steel ladle bottom impact area prefabricated part is 1.4m, and the thickness H of the steel ladle bottom impact area prefabricated part is 0.3 m; the relationship between the vertical arrangement distance L of the exhaust media 2 and the total length L of the impact block is L-1/3L; the relationship between the transverse arrangement distance H of the exhaust media 2 and the total thickness H of the impact block is as follows: h is 1/2H; the exhaust medium 2 is a paraffin rope. The melting point of the exhaust medium 2 is lower than 140 ℃, the exhaust medium 2 is melted and exhausted in the baking process, and the exhaust channel 3 is left, so that extremely high vapor pressure generated inside is greatly reduced, and the problem that the product bursts in the baking process can be solved.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above-described embodiments, and many modifications are possible. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should be considered as belonging to the protection scope of the present invention.

Claims

1. The utility model provides a large-scale anti-burst ladle bottom impact area prefab which characterized in that: the baking oven comprises a plurality of prefabricated blocks (1) and exhaust media (2), wherein the prefabricated blocks (1) are provided with a plurality of exhaust media (2), the exhaust media (2) are arranged among the prefabricated blocks (1), the melting point of the exhaust media (2) is far lower than that of the prefabricated blocks (1), and an exhaust channel (3) is left after the exhaust media (2) are melted in the baking process.

2. The large burst-proof ladle bottom impact zone preform as claimed in claim 1, wherein: the exhaust device is characterized in that a horizontally arranged exhaust medium (2) is arranged between the two vertically adjacent prefabricated blocks (1), a vertically arranged exhaust medium (2) is arranged between the two horizontally adjacent prefabricated blocks (1), and the horizontally and vertically arranged exhaust medium (2) forms a grid shape, so that the exhaust medium can be rapidly discharged after being melted in the baking process, and an exhaust channel (3) is reserved.

3. A large burst proof ladle bottom impact area preform according to claim 2, wherein: the relationship between the vertical arrangement distance L of the exhaust media (2) and the total length L is as follows: when L > 1.5m, L ═ 1/4L; when L is less than or equal to 1.5m, L is 1/3L.

4. A large burst proof ladle bottom impact area preform according to claim 2 or 3, wherein: the relationship between the transverse arrangement distance H and the total height H of the exhaust medium (2) is as follows: h is 1/2H.

5. The large burst-proof ladle bottom impact zone preform as claimed in claim 4, wherein: the exhaust medium (2) is a paraffin rope, a polyethylene plastic rope or a polystyrene plastic rope.