CN220560403U - Ladle bottom refractory structure - Google Patents
Ladle bottom refractory structure Download PDFInfo
- Publication number
- CN220560403U CN220560403U CN202322106697.8U CN202322106697U CN220560403U CN 220560403 U CN220560403 U CN 220560403U CN 202322106697 U CN202322106697 U CN 202322106697U CN 220560403 U CN220560403 U CN 220560403U
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- Prior art keywords
- prefabricated brick
- ladle bottom
- bottom refractory
- shaped
- ladle
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- 239000011449 brick Substances 0.000 claims abstract description 88
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 86
- 239000010959 steel Substances 0.000 claims abstract description 86
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 abstract description 6
- 239000011819 refractory material Substances 0.000 description 13
- 238000005266 casting Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The utility model relates to a ladle bottom refractory structure, which comprises a permanent pouring material layer positioned at the bottom of a ladle, a ladle bottom refractory prefabricated brick positioned above the permanent pouring material layer and contacted with molten steel, and a working pouring material layer surrounding the ladle bottom refractory prefabricated brick, and is characterized in that: the steel ladle bottom refractory prefabricated brick comprises a working layer prefabricated brick contacted with molten steel, and further comprises a safety layer prefabricated brick nested at the bottom of the working layer prefabricated brick, wherein the section of the safety layer prefabricated brick is T-shaped, and a net-shaped steel structure is arranged on a plane 0-30mm away from the upper surface of the safety layer prefabricated brick.
Description
Technical Field
The utility model relates to a steel ladle refractory structure, in particular to a steel ladle bottom refractory structure.
Background
The steel tapping hole of the converter is provided with a drop height of about 7 meters to the bottom of the steel ladle, the impact area at the bottom of the steel ladle is the part with the most serious molten steel flushing, the impact area is required to bear the impact of molten steel with the temperature of about 1650 ℃ from the converter, and the thickness of refractory materials in the impact area is gradually reduced and the safety risk is also gradually increased along with the increase of the using times of the steel ladle.
At present, the steel ladle bottom refractory structure is shown in fig. 1, and generally comprises a permanent casting material layer 1 positioned at the bottom of a steel ladle, a steel ladle bottom refractory prefabricated brick 3 positioned above the permanent casting material layer and contacted with molten steel, and a working casting material layer 2 surrounding the steel ladle bottom refractory prefabricated brick, wherein the steel ladle bottom refractory prefabricated brick 3 is generally a whole refractory prefabricated plate which becomes thinner and thinner along with the flushing and melting loss of the molten steel, and even causes the molten steel leakage and seepage of the impact area part, so that the whole steel ladle is scrapped. Because the integral refractory precast slab is arranged in the impact area at the bottom of the steel ladle, the lower part of the precast slab in the impact area is connected with the permanent layer of the steel ladle, and the precast slab is gradually melted and damaged in the use process of the steel ladle, and the thickness of the refractory is thinned. Because the integral precast slab has no obvious warning sign, ladle judgment personnel cannot accurately judge the residual thickness of the refractory precast bricks in the impact area of the ladle bottom, and the judgment errors are sometimes unavoidable completely by experience, so that molten steel is leaked and leaked at the impact area part in the use process of the ladle, and even the whole ladle is scrapped.
Therefore, how to accurately and timely find the risk of the refractory material thinning caused by scouring and melting loss of the refractory material precast brick in the ladle bottom impact area and how to avoid the seepage and the steel leakage of the ladle bottom impact area are a big problem of ladle steelmaking.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a steel ladle bottom refractory structure, which adopts the following technical scheme: the utility model provides a ladle bottom refractory structure, it includes the permanent pouring bed that is located ladle bottom, the ladle bottom refractory prefabricated brick that is located permanent pouring bed top and contacts with molten steel to and the work pouring bed that surrounds ladle bottom refractory prefabricated brick, its characterized in that: the steel ladle bottom refractory prefabricated brick comprises a working layer prefabricated brick contacted with molten steel, and further comprises a safety layer prefabricated brick nested at the bottom of the working layer prefabricated brick, wherein the section of the safety layer prefabricated brick is T-shaped, and a net-shaped steel structure is arranged on a plane 0-30mm away from the upper surface of the safety layer prefabricated brick.
The utility model is further characterized in that:
the mesh steel structure is formed by welding reinforcing steel bars with the diameter of 6-10mm, and the mesh steel structure is 100 mm.
The periphery of the prefabricated brick of the working layer is designed in a concave-convex staggered mode or a step-shaped mode or a combination of the two designs from top to bottom.
The height of the prefabricated brick of the safety layer is 90-120mm.
When the mesh steel structure is arranged on the plane 0-20 mm away from the upper surface of the safety layer prefabricated brick, at least 4T-shaped rivets connected with the working layer prefabricated brick are uniformly arranged on the nodes of the mesh steel structure in the upward direction, and at least 4T-shaped rivets connected with the safety layer prefabricated brick are also uniformly arranged on the nodes of the mesh steel structure in the downward direction.
The T-shaped rivet is formed by welding reinforcing steel bars with the diameter of 4-6mm, and the height of the T-shaped rivet is 30-70 mm.
The T-shaped rivet is 30mm, 40 mm, 50mm, 60mm or 70mm in height.
When the mesh steel structure is arranged on the plane 20-30 mm away from the upper surface of the safety layer prefabricated brick, at least 4T-shaped rivet nails connected with the working layer prefabricated brick are uniformly arranged on the nodes of the mesh steel structure in the upward direction.
The T-shaped rivet is formed by welding reinforcing steel bars with the diameter of 4-6mm, and the height of the T-shaped rivet is 30-70 mm.
The T-shaped rivet is 30mm, 40 mm, 50mm, 60mm or 70mm in height.
The beneficial effects of the utility model are as follows:
the steel and refractory materials have two different brightnesses at high temperature, so that a warning effect can be well played for ladle judgment staff, even if the steel structure is melted, a 6-10mm groove is formed on the surface of the refractory material, the brightness of the groove at high temperature is different from that of surrounding refractory materials, the groove is brighter than that of the refractory material, and therefore, the ladle judgment staff can judge the condition of the ladle bottom refractory material more intuitively, conveniently and rapidly. The lower safety layer prefabricated brick of the grid-shaped steel structure has the thickness of about 100mm, so that molten steel is not leaked to the impact area part caused by a vertical horse, ladle judgment staff can arrange maintenance staff to maintain the ladle in a line in time, safer operation of the ladle can be ensured, and the service life of the ladle can be effectively prolonged.
In addition, due to the thermal shock problem, longitudinal cracks are easy to occur on the working layer prefabricated brick in the steel ladle bottom refractory structure, when the cracks are expanded to the safety layer prefabricated brick, as the safety layer prefabricated brick and the working layer prefabricated brick are formed by casting twice, the interface is provided with a seam, the cracks are blocked by the seam of the interface between the working layer prefabricated brick and the safety layer prefabricated brick, the cracks cannot extend downwards continuously, molten steel is prevented from directly penetrating into the steel ladle bottom permanent layer, and the safety coefficient of the steel ladle bottom is improved.
Drawings
FIG. 1 is a cross-sectional view of a conventional ladle bottom refractory structure;
FIG. 2 is a cross-sectional view of the structure of an embodiment of the present utility model;
FIG. 3 is an enlarged view of the structure of the ladle bottom refractory prefabricated brick of FIG. 2;
FIG. 4 is a perspective view of the mesh steel structure and T-rivet of FIG. 3;
FIG. 5 is a cross-sectional view of another embodiment of the present utility model;
FIG. 6 is an enlarged view of the structure of the ladle bottom refractory prefabricated brick of FIG. 5;
fig. 7 is a perspective view of the mesh steel structure and T-rivet of fig. 6.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
Embodiment 1, refer to fig. 2 to 4, a ladle bottom refractory structure, which comprises a permanent castable layer 1 positioned at the bottom of a ladle, a ladle bottom refractory prefabricated brick 3 positioned above the permanent castable layer and contacted with molten steel, and a working castable layer 2 surrounding the ladle bottom refractory prefabricated brick, wherein the ladle bottom refractory prefabricated brick 3 comprises a working layer prefabricated brick 31 contacted with molten steel, and further comprises a safety layer prefabricated brick 32 nested at the bottom of the working layer prefabricated brick and provided with a net-shaped steel structure 33 on a plane 20-30 mm away from the upper surface of the safety layer prefabricated brick.
In the embodiment, the mesh steel structure is a 100 x 100mm mesh steel structure formed by welding reinforcing steel bars with the diameter of 6-10 mm; in order to enhance the connection stability of the prefabricated bricks of the safety layer and the prefabricated bricks of the working layer, 4T-shaped rivet nails 34 connected with the prefabricated bricks of the working layer are uniformly arranged on the nodes of the reticular steel structure 33, and are formed by welding reinforcing steel bars with the diameters of 4-6mm, wherein the heights of the T-shaped rivet nails are 30-70 mm; the steel bars used in the reticular steel structure are thick, the safety warning is more obvious, the steel bars used in the T-shaped rivet 34 are thin, the thermal expansion is small, and the influence on the refractory is avoided.
In addition, in the present embodiment, the height of the security layer prefabricated brick 32 is 90-120mm; the periphery of the working layer precast brick 31 is designed to be step-shaped from top to bottom, so that the working layer precast brick can be meshed with the working castable layer 2 in a non-impact area during application, and is not easy to fall off.
In practical application, the periphery of the prefabricated brick 31 of the working layer can be designed to be staggered from top to bottom, or can be designed to be a combination of a step-shaped design and a staggered design, so that the prefabricated brick can be meshed with the working castable layer 2 of the non-impact area in application, and is not easy to fall off.
In practical application, the number of T-shaped rivet nails connected with the prefabricated bricks of the working layer, which are uniformly arranged on the nodes of the reticular steel structure, can be 5, 6, 7, 8 or more; the T-shaped rivet 34 has a height of 30mm, 40 mm, 50mm, 60mm or 70mm.
Embodiment 2 referring to fig. 5 to 7, in this embodiment, the safety layer prefabricated brick 32 is provided with a mesh steel structure 33 on a plane 0-20 mm from the upper surface thereof. The mesh steel structure 33 is a 100 x 100mm mesh steel structure formed by welding reinforcing steel bars with the diameter of 6-10 mm; in order to enhance the connection stability of the safety layer prefabricated brick 32 and the working layer prefabricated brick 31, 4T-shaped rivets 34 connected with the working layer prefabricated brick 31 are uniformly arranged on the node of the net-shaped steel structure 33 in the upward direction, and 4T-shaped rivets 34 connected with the safety layer prefabricated brick 32 are uniformly arranged on the node of the net-shaped steel structure 33 in the downward direction; the periphery of the working layer precast brick 31 is designed to be in a staggered way from top to bottom, so that the working layer precast brick can be meshed with the working castable layer 2 in a non-impact area during application, and is not easy to fall off; other structures are the same as those of embodiment 1.
In practical applications, the number of T-shaped rivets uniformly arranged in the upward and downward directions on the nodes of the mesh steel structure 33 may be 5, 6, 7, 8 or more.
Because the ladle bottom refractory prefabricated brick 3 comprises the working layer prefabricated brick 31 contacted with molten steel and the safety layer prefabricated brick 32 nested at the bottom of the working layer prefabricated brick 31 and with the T-shaped cross section, the safety layer prefabricated brick is provided with the net-shaped steel structure 33 on the plane 0-30mm away from the upper surface of the safety layer prefabricated brick, when the ladle bottom refractory structure is fused to the net-shaped steel structure 33, two different brightnesses are presented by steel and refractory materials at high temperature, the warning effect can be well played for ladle judgment personnel, even if the steel structure is fused, a 6-10mm groove is formed on the surface of the refractory material, the brightness of the groove is different from that of surrounding refractory materials at high temperature, and compared with the refractory materials, the ladle judgment personnel can judge the condition of the ladle bottom refractory material structure more intuitively, conveniently and rapidly. The lower safety layer prefabricated brick of the grid-shaped steel structure has the thickness of about 100mm, so that molten steel is not leaked to the impact area part caused by a vertical horse, ladle judgment staff can arrange maintenance staff to maintain the ladle in a line in time, safer operation of the ladle can be ensured, and the service life of the ladle can be effectively prolonged.
In addition, due to the thermal shock problem, the working layer precast bricks 31 in the steel ladle bottom refractory structure are easy to generate longitudinal cracks, when the cracks are expanded to the safety layer precast bricks 32, the safety layer precast bricks 32 and the working layer precast bricks 31 are formed by casting twice, the interfaces are provided with joints, the cracks are blocked by the joints of the interfaces of the working layer precast bricks 31 and the safety layer precast bricks 32, the cracks cannot extend downwards continuously, molten steel is prevented from directly penetrating into the steel ladle bottom permanent layer, and the safety coefficient of the steel ladle bottom is improved.
While the technical content and features of the present utility model have been disclosed above, it will be understood that various changes and modifications to the above-described structure, including combinations of technical features individually disclosed or claimed herein, and other combinations of these features as apparent to those skilled in the art may be made under the inventive concept of the present utility model. Such variations and/or combinations fall within the technical field to which the utility model relates and fall within the scope of the claims of the utility model.
Claims (10)
1. The utility model provides a ladle bottom refractory structure, it includes the permanent pouring bed that is located ladle bottom, the ladle bottom refractory prefabricated brick that is located permanent pouring bed top and contacts with molten steel to and the work pouring bed that surrounds ladle bottom refractory prefabricated brick, its characterized in that: the steel ladle bottom refractory prefabricated brick comprises a working layer prefabricated brick contacted with molten steel, and further comprises a safety layer prefabricated brick nested at the bottom of the working layer prefabricated brick, wherein the section of the safety layer prefabricated brick is T-shaped, and a net-shaped steel structure is arranged on a plane 0-30mm away from the upper surface of the safety layer prefabricated brick.
2. The ladle bottom refractory structure of claim 1, wherein: the mesh steel structure is formed by welding reinforcing steel bars with the diameter of 6-10mm, and the mesh steel structure is 100 mm.
3. The ladle bottom refractory structure of claim 1, wherein: the periphery of the prefabricated brick of the working layer is designed in a concave-convex staggered mode or a step-shaped mode or a combination of the two designs from top to bottom.
4. The ladle bottom refractory structure of claim 1, wherein: the height of the prefabricated brick of the safety layer is 90-120mm.
5. The ladle bottom refractory structure as recited in claim 1 or claim 2 or claim 3 or claim 4, wherein: when the mesh steel structure is arranged on the plane 0-20 mm away from the upper surface of the safety layer prefabricated brick, at least 4T-shaped rivets connected with the working layer prefabricated brick are uniformly arranged on the nodes of the mesh steel structure in the upward direction, and at least 4T-shaped rivets connected with the safety layer prefabricated brick are also uniformly arranged on the nodes of the mesh steel structure in the downward direction.
6. The ladle bottom refractory structure of claim 5, wherein: the T-shaped rivet is formed by welding reinforcing steel bars with the diameter of 4-6mm, and the height of the T-shaped rivet is 30-70 mm.
7. The ladle bottom refractory structure as recited in claim 6, wherein: the T-shaped rivet is 30mm, 40 mm, 50mm, 60mm or 70mm in height.
8. The ladle bottom refractory structure as recited in claim 1 or claim 2 or claim 3 or claim 4, wherein: when the mesh steel structure is arranged on the plane 20-30 mm away from the upper surface of the safety layer prefabricated brick, at least 4T-shaped rivet nails connected with the working layer prefabricated brick are uniformly arranged on the nodes of the mesh steel structure in the upward direction.
9. The ladle bottom refractory structure of claim 8, wherein: the T-shaped rivet is formed by welding reinforcing steel bars with the diameter of 4-6mm, and the height of the T-shaped rivet is 30-70 mm.
10. The ladle bottom refractory structure of claim 9, wherein: the T-shaped rivet is 30mm, 40 mm, 50mm, 60mm or 70mm in height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322106697.8U CN220560403U (en) | 2023-08-07 | 2023-08-07 | Ladle bottom refractory structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322106697.8U CN220560403U (en) | 2023-08-07 | 2023-08-07 | Ladle bottom refractory structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220560403U true CN220560403U (en) | 2024-03-08 |
Family
ID=90104380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322106697.8U Active CN220560403U (en) | 2023-08-07 | 2023-08-07 | Ladle bottom refractory structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220560403U (en) |
-
2023
- 2023-08-07 CN CN202322106697.8U patent/CN220560403U/en active Active
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