Steel ladle bottom structure

Abstract

The utility model discloses a steel ladle bottom structure which comprises a permanent layer and a working layer, the working layer is formed on the upper surface of the permanent layer, the side, away from the permanent layer, of the working layer is in contact with molten steel, a nozzle brick is arranged on the permanent layer, and the nozzle brick penetrates through the working layer and is communicated with the molten steel in a steel ladle. The height of the upper surface of the permanent layer is gradually reduced from the edge position connected with the steel ladle side vertical wall to the position connected with the nozzle brick, a first-stage boss is formed on the area, facing molten steel impact, of the working layer, and the first-stage boss extends in the molten steel impact direction and is higher than the surrounding area not subjected to molten steel impact. And the nozzle brick penetrates through a non-molten steel impact area on the working layer. The ladle bottom permanent layer is of an inclined structure, so that the nozzle is located at a low position, and the molten steel yield is increased; the ladle bottom permanent layer is an integral precast block and is less affected by field temperature conditions; and a stepped transition design is adopted between the molten steel impact area and the non-molten steel impact area of the ladle bottom working layer, so that the erosive wear of molten steel to the ladle bottom during tapping is relieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metallurgical equipment technical field, specifically a ladle bottom structure. BACKGROUND

[0002] The ladle is the key equipment in the steel industry, not only needs to undertake, transports the molten steel, also needs to undertake the task of molten steel refining, and plays an important role in the steel industry. And the ladle bottom is an important component of the ladle, and its service environment is extremely harsh, needs to bear the molten steel scouring wear, molten slag erosion and penetration and thermal shock impact, therefore, the structure, performance and construction quality of the ladle bottom are all higher requirements, to ensure the safety and service life of the ladle bottom.

[0003] At present, the mainstream ladle bottom masonry mode includes the following three kinds: machine-pressed brick / prefabricated block masonry, integral pouring and prefabricated block / machine-pressed brick and pouring material composite masonry, all of which have achieved good application effect, but at the same time, there are certain deficiencies.

[0004] Patent document CN101985170A discloses a method of using small blocks for prefabricated block ladle bottom, which helps to uniformly disperse the thermal stress during service and improves the service life of the ladle bottom, but the production cost of small blocks is higher and will lead to increased masonry complexity, which improves the working intensity of workers.

[0005] Patent document CN205183761 discloses a ladle pouring ladle bottom structure, which ensures the integrity of the ladle bottom, reduces the construction intensity of the ladle bottom, and also reduces the use cost of the ladle bottom, but the integral pouring ladle bottom is extremely sensitive to changes in the site environment factors, and is prone to baking burst when baking improperly, and the long baking time will affect the normal turnover of the ladle.

[0006] Patent document CN110449568A discloses a ladle composite ladle bottom, which uses pouring material to thicken the working layer of the brick masonry ladle bottom, reduces the number of times of removing the ladle bottom bricks, and improves the cold repair efficiency of the ladle bottom, but also has the problem of difficulty in cleaning the pouring material of the working layer. UTILITY MODEL CONTENTS

[0007] Therefore, the technical problem to be solved by the utility model is to provide a ladle bottom structure which can reduce the labor intensity of workers on site, improve the use effect of the ladle bottom and help to improve the molten steel yield.

[0008] To solve the above technical problems, the utility model provides the following technical scheme: a ladle bottom structure, including permanent layer and working layer, working layer is formed on the upper surface of permanent layer, the side of working layer away from permanent layer is contacted with molten iron, the permanent layer is provided with nozzle brick, the nozzle brick passes through working layer and is communicated with the molten iron in the ladle, the height of the upper surface of permanent layer gradually reduces from the edge position connected with the side vertical wall of ladle to the position connected with nozzle brick, the area of working layer facing the impact of molten iron is formed with primary boss, the primary boss extends to the direction facing the impact of molten iron and is higher than the surrounding non-molten iron impact area, the nozzle brick penetrates the non-molten iron impact area on working layer.

[0009] The ladle bottom structure has the advantages that the angle between the upper surface of the permanent layer and the horizontal plane is 4-10 degrees.

[0010] The ladle bottom structure has the advantages that the primary boss is 30-50 mm higher than the surrounding non-molten iron impact area on working layer.

[0011] The ladle bottom structure has the advantages that the secondary boss is formed on the position of the primary boss directly facing the center of the impact of molten iron, and the area of the secondary boss is smaller than that of the primary boss.

[0012] The ladle bottom structure has the advantages that the secondary boss is 30-50 mm higher than the primary boss.

[0013] The ladle bottom structure has the advantages that the edge of the secondary boss is connected to the surface of the primary boss through a circular arc surface or an inclined surface, and the edge of the primary boss is connected to the working layer through a circular arc surface or an inclined surface.

[0014] The ladle bottom structure has the advantages that the air brick mounting port is formed on the primary boss, and the air brick is mounted in the air brick mounting port.

[0015] The ladle bottom structure has the advantages that the side wall of the working layer facing the molten iron gradually lowers from the position away from the nozzle brick to the position connected with the nozzle brick.

[0016] The ladle bottom structure has the advantages that the permanent layer is an integrally prefabricated block.

[0017] The ladle bottom structure has the advantages that the working layer includes a plurality of refractory bricks, and the plurality of refractory bricks are laid on the permanent layer to form the working layer.

[0018] The technical scheme of the utility model has the following beneficial technical effects:

[0019] 1. The permanent layer of the ladle bottom is of an inclined structure, so that the nozzle is at a low position, the molten iron is easily discharged, and the yield of the molten iron is greatly improved.

[0020] 2. The permanent layer of the bottom layer is an integral precast block, which is less affected by the on-site temperature conditions, has stable performance and high reliability, not only reducing the construction intensity, but also further improving the safety of the steel ladle bottom.

[0021] 3. The ladle bottom working layer adopts a stepped transition design between the molten steel impact zone and the non-molten steel impact zone, which helps to achieve a smooth transition of molten steel from the impact zone to the non-impact zone, reduces the scouring and wear of molten steel on the ladle bottom during tapping, and improves the service performance of the ladle bottom. Attached Figure Description

[0022] Figure 1 A cross-sectional structural diagram of the steel ladle of this utility model;

[0023] Figure 2 A three-dimensional structural diagram of the working layer of this utility model;

[0024] Figure 3 A top view of the working layer of this utility model;

[0025] Figure 4 This utility model Figure 3 A schematic diagram of the cross-section at point AA.

[0026] The reference numerals in the figure are as follows: 1-Permanent layer; 2-Working layer; 21-Installation port for sprue brick; 22-Primary boss; 23-Secondary boss; 24-Installation port for permeable brick; 3-Permeable brick; 4-Sprue brick; 5-Upper surface. Detailed Implementation

[0027] One embodiment of the steel ladle bottom structure, such as Figures 1-2 As shown, it includes a permanent layer 1 and a working layer 2. The working layer 2 is formed on the upper surface 5 of the permanent layer 1. The side of the working layer 2 away from the permanent layer 1 is in contact with the molten steel. A nozzle brick 4 is provided on the permanent layer 1. The nozzle brick 4 passes through the working layer 2 and is connected to the molten steel in the ladle. The permanent layer 1 is an integral precast block. The ladle bottom permanent layer 1 is an integral precast block, which is less affected by the on-site temperature conditions, has stable performance and high reliability. It not only reduces the construction intensity, but also further improves the safety of the ladle bottom. The working layer 2 is formed by refractory bricks built on the permanent layer 1. The height of the upper surface 5 of the permanent layer 1 gradually decreases from the edge position connected to the side wall of the ladle to the position connected to the nozzle brick 4, forming a sloping surface. The angle between the upper surface 5 of the permanent layer 1 and the horizontal plane is 4 to 10 degrees, preferably 6 degrees. The permanent layer 1 has an inclined structure, which puts the nozzle at a low position, which is convenient for steel tapping and greatly improves the molten steel yield.

[0028] like Figures 2-3As shown, the working layer 2 is formed with a first convex platform 22 on the area facing the molten steel impact, the first convex platform 22 extends in the direction facing the molten steel impact and is higher than the surrounding non-molten steel impact area, the nozzle brick 4 penetrates the non-molten steel impact area on the working layer 2; the first convex platform 22 is 30-50mm higher than the surrounding non-molten steel impact area on the working layer 2, and in the embodiment, the height of the first convex platform 22 is 50mm, the edge of the first convex platform 22 is connected to the working layer 2 through a circular arc surface or a slope surface, and a gas permeable brick mounting hole 24 is formed on the first convex platform 22, and a gas permeable brick is mounted in the gas permeable brick mounting hole 24, and the working layer 2 is designed in a stepped transition between the molten steel impact area and the non-molten steel impact area, which helps to realize the smooth transition of the molten steel from the impact area to the non-impact area, slow down the scouring and wearing of the ladle bottom by the molten steel during tapping, and improve the use effect of the ladle bottom.

[0029] As shown in Figures 2-3 , a second convex platform 23 is formed on the first convex platform 22 at a position opposite to the center of the molten steel impact, the area of the second convex platform 23 is smaller than that of the first convex platform 22, and the second convex platform 23 is 30-50mm higher than the first convex platform 22, and in the embodiment, the height of the second convex platform 23 is 50mm; the edge of the second convex platform 23 is connected to the surface of the first convex platform 22 through a circular arc surface or a slope surface.

[0030] As shown in Figure 1 , Figure 4 , the side wall of the working layer 2 facing the molten steel gradually lowers from a position away from the nozzle brick 4 to a position connected to the nozzle brick 4, the top surface of the first convex platform 22, the top surface of the second convex platform 23 and the top surface of the rest of the working layer 2 are all inclined to form a slope surface towards the nozzle brick 4, which is beneficial to the flow of the molten steel, improves the molten steel yield, and is also beneficial to reducing the direct erosion of the molten steel to the working layer 2.

[0031] Obviously, the above embodiments are only examples for clearly illustrating, but not limiting the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the patent application claims.

Claims

1. A ladle bottom structure comprising a permanent layer (1) and a working layer (2) formed on the upper surface (5) of the permanent layer (1), the side of the working layer (2) facing away from the permanent layer (1) being in contact with molten steel, a nozzle brick (4) being provided on the permanent layer (1), the nozzle brick (4) passing through the working layer (2) and being in communication with the molten steel in the ladle, characterized in that, The height of the upper surface (5) of the permanent layer (1) gradually decreases from the edge position connected with the ladle side vertical wall to the position connected with the nozzle brick (4), a first convex platform (22) is formed on the area of the working layer (2) facing the molten steel impact, the first convex platform (22) extends towards the direction of the molten steel impact and is higher than the surrounding non-molten steel impact area, and the nozzle brick (4) penetrates the non-molten steel impact area of the working layer (2).

2. The steel ladle bottom structure according to claim 1, characterized by The included angle between the upper surface (5) of the permanent layer (1) and the horizontal plane is 4-10 degrees.

3. The steel ladle bottom structure according to claim 1, characterized by The first convex platform (22) is 30-50 mm higher than the non-molten steel impact area of the working layer (2).

4. The steel ladle bottom structure according to claim 1, characterized by A second convex platform (23) is formed on the position of the first convex platform (22) directly opposite the center of the molten steel impact, and the area of the second convex platform (23) is smaller than that of the first convex platform (22).

5. The steel ladle bottom structure according to claim 4, characterized by The second convex platform (23) is 30-50 mm higher than the first convex platform (22).

6. The steel ladle bottom structure according to claim 4, characterized by The edge of the second convex platform (23) is connected with the surface of the first convex platform (22) through a circular arc surface or an inclined surface, and the edge of the first convex platform (22) is connected with the working layer (2) through a circular arc surface or an inclined surface.

7. The steel ladle bottom structure according to claim 4, characterized by A gas permeable brick mounting hole (24) is formed on the first convex platform (22), and a gas permeable brick is mounted in the gas permeable brick mounting hole (24).

8. The steel ladle bottom structure according to claim 1, characterized by The side wall surface of the working layer (2) facing the molten steel gradually decreases from the position away from the nozzle brick (4) to the position connected with the nozzle brick (4).

9. A ladle bottom structure according to any one of claims 1 to 8, characterized in that The permanent layer (1) is an integral prefabricated block.

10. A ladle bottom structure according to any one of claims 1 to 8, characterized in that The working layer (2) includes a plurality of refractory bricks, and the plurality of refractory bricks are laid on the permanent layer (1) to form the working layer (2).

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