CN212495364U - Tundish bottom impact area structure for preventing ladle from turning over - Google Patents
Tundish bottom impact area structure for preventing ladle from turning over Download PDFInfo
- Publication number
- CN212495364U CN212495364U CN202020503605.3U CN202020503605U CN212495364U CN 212495364 U CN212495364 U CN 212495364U CN 202020503605 U CN202020503605 U CN 202020503605U CN 212495364 U CN212495364 U CN 212495364U
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- Prior art keywords
- impact plate
- tundish
- ladle
- pouring
- impact
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- 239000000463 material Substances 0.000 claims abstract description 39
- 230000007306 turnover Effects 0.000 claims abstract description 7
- 238000005253 cladding Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 26
- 239000010959 steel Substances 0.000 abstract description 26
- 238000009749 continuous casting Methods 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000005266 casting Methods 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000003628 erosive effect Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000011449 brick Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The utility model relates to a tundish bottom impact area structure for preventing ladle from turning, which comprises an upper impact plate, a lower impact plate, a casting material and a tundish shell; the upper impact plate, the lower impact plate, the pouring material and the middle cladding are sequentially overlapped and built from top to bottom, the upper surface of the upper impact plate and the upper surface of the dry material working layer in the pouring area of the middle cladding are positioned on the same plane, and the size of the lower impact plate is larger than that of the upper impact plate. The utility model discloses can effectively resist and open and water the impact and the erosion of the resistant material of molten steel impact zone to the middle ladle bottom, stop the middle ladle and turn over a packet and bleed-out accident, improve the continuous casting machine and water the stove number, guarantee that the middle ladle of continuous casting is longlived, safe and stable production operation, reduction manufacturing cost of enterprise.
Description
Technical Field
The utility model relates to a continuous casting production process equipment especially relates to a middle package bottom impact area structure that prevents to turn over package.
Background
The continuous casting tundish is the last metallurgical container before molten steel enters the crystallizer, is not only a transition container with the traditional meaning, but also plays a role in removing non-metallic inclusions in the molten steel and stabilizing the uniform molten steel, ensuring the quality of continuous casting billets, and plays an important role in the smooth running of continuous casting production and ensuring the quality of the molten steel. The reasonable tundish structure can provide a reasonable molten steel flowing state, and the quality of the continuous casting billet is improved. In the continuous casting production, when casting is often performed, a refractory material at the bottom of a tundish is impacted and eroded by casting molten steel to float upwards, so that the molten steel overturns, the tundish is overturned or even the bottom of the tundish leaks, a major safety production accident of continuous casting is caused, and huge economic loss and production safety threats are brought to enterprises.
Fig. 1 shows that the conventional tundish bottom structure comprises an impact area 7 and a pouring area 8, wherein the impact area 7 comprises a dry material working layer 1, an upper impact plate 2, a lower impact plate 3, a light brick insulating layer 4 and a tundish shell 5 from top to bottom; through analysis, the main reasons for packet turning and even packet missing are found to be two: firstly, the dry material working layer 1 and the upper impact plate 2 have larger material difference, the expansion coefficients have more difference under the high-temperature baking condition, the joint of the two materials is easy to generate gaps and separate, and when casting is started, the dry material working layer 1 above the upper impact plate 2 is washed by molten steel and is easy to float upwards, so that the molten steel is overturned to generate ladle overturning; and secondly, the strength of the light-weight brick heat-insulating layer 4 is poor, molten steel poured by the casting ladle easily rushes through the dry-type material working layer 1, and ladle bottom steel leakage is caused after the upper impact plate 2 and the lower impact plate 3 are damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a prevent to turn over middle package end impact area structure of package is provided, can effectively stop the middle package and turn over package and bleed-out accident, guarantee that the package is longe-lived, safe and stable production operation in the middle of the continuous casting.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a tundish bottom impact area structure for preventing ladle from turning comprises an upper impact plate, a lower impact plate, a pouring material and a tundish shell.
According to the tundish bottom impact area structure for preventing ladle overturning, the upper impact plate, the lower impact plate, the pouring material and the tundish shell are sequentially overlapped and built from top to bottom, the upper surface of the upper impact plate and the upper surface of the dry material working layer in the tundish pouring area are positioned on the same plane, and the size of the lower impact plate is larger than that of the upper impact plate.
According to the tundish bottom impact area structure for preventing ladle turnover, the upper impact plate and the lower impact plate are rectangular plates, the upper surface of the upper impact plate and the dry material working layer of the tundish pouring area are positioned on the same plane, and the length and the width of the lower impact plate are respectively increased by 100-150 mm.
In the existing tundish impact area structure, a dry material working layer is positioned above an upper impact plate, and because the upper surface and the lower surface of the impact plate are smooth, the material difference with the dry material working layer is large, the expansion coefficient difference is large under the high-temperature baking condition, and the joint of the two materials is easy to generate gaps and separate, the dry material working layer above the impact plate is washed by molten steel during casting, so that the dry material working layer is easy to float upwards, and the molten steel is overturned to generate ladle overturning; the strength of the light-weight brick heat-insulating layer below the lower impact plate is poor, the degree of combining with the lower impact plate is poor, and when the upper impact plate and the lower impact plate are damaged, molten steel easily burns through the light-weight brick of the heat-insulating layer to cause a steel leakage accident. The utility model discloses to prior art drawback, on the basis that does not change the permanent layer of pouring material, the dry-type material working layer of upper impact plate upper surface has been removed, impact plate thickness increases on will, make upper impact plate upper surface and pouring basket pouring area dry-type material working layer upper surface be in the coplanar, the resistant intensity of washout of pouring basket pouring area has been increased, lower impact plate superposes under upper impact plate, long and wide upper impact plate respectively increases 100 and adds 150mm, the area of receiving the impact has been increased, get rid of simultaneously with the light brick heat preservation of lower impact plate lower surface coincide down, replace with the pouring material, can promote the combination compactness of pouring material and lower impact plate by a wide margin, the safety factor has been increased, prevent that the molten steel from wearing to wrap the end bleed-out.
The utility model discloses a working process does: when the pouring of the long nozzle of each furnace is performed in the continuous casting, the poured molten steel directly impacts the upper surface of the thickened upper impact plate of the tundish, and the thickened upper impact plate has higher strength, can effectively resist the impact of the molten steel and ensures that ladle overturning does not occur; the lower impact plate and the tundish shell body are poured through the pouring material, so that the lower impact plate and the tundish shell body are firmer, firm support is provided for the upper impact plate to be impacted and washed by molten steel, and meanwhile, as the length and the width of the lower impact plate are increased, the impacted area is increased, the safety factor is increased, and the occurrence of serious tundish leakage accidents of the continuous casting tundish is prevented.
The utility model has the advantages that:
the utility model discloses can effectively resist and open and water the impact and the erosion of the resistant material of molten steel impact zone to the middle ladle bottom, stop the middle ladle and turn over a packet and bleed-out accident, improve the continuous casting machine and water the stove number, guarantee that the middle ladle of continuous casting is longlived, safe and stable production operation, reduction manufacturing cost of enterprise.
Drawings
FIG. 1 is a schematic view of a conventional tundish bottom structure;
FIG. 2 is a schematic structural view of the present invention;
labeled as: the device comprises a dry material working layer 1, an upper impact plate 2, a lower impact plate 3, a light brick heat-insulating layer 4, a middle cladding 5, a castable permanent layer 6, a tundish impact area 7, a tundish pouring area 8, castable 9, a long nozzle 10 and molten steel 11.
Detailed Description
Fig. 2 is a schematic diagram of a specific structure of an embodiment of the present invention, in this embodiment, the nominal capacity of the tundish is 32t, which is suitable for a converter with 120-150t furnace capacity, but this technique is suitable for tundishes with all nominal capacities.
Fig. 2 shows that the tundish bottom impact area structure for preventing ladle from turning comprises a rectangular upper impact plate 2, a rectangular lower impact plate 3, a pouring material 9 and a tundish shell 5 which are sequentially built from top to bottom; the upper surface of the upper impact plate 2 and the upper surface of the dry material working layer 1 of the tundish pouring area 8 are positioned on the same plane, the length, the width and the thickness of the upper impact plate 2 are respectively 500mm, 500mm and 100mm, and the length, the width and the thickness of the lower impact plate 3 are respectively 600mm, 600mm and 75 mm; the dry material working layer 1 is Mg dry material; the casting material 9 is formed by casting high Al casting material.
In actual production, when the long nozzle 10 of each furnace of continuous casting is cast, molten steel 11 which is cast directly impacts the upper surface of the thickened upper impact plate 2 of the tundish, and the thickened upper impact plate 2 has higher strength, can effectively resist the impact of the molten steel and ensure that ladle overturning does not occur; the lower impact plate 3 and the tundish shell 5 are poured by the high Al castable 9, so that the lower impact plate is firmer, firm support is provided for the upper impact plate 2 to be impacted and washed by molten steel, and meanwhile, as the length and the width of the lower impact plate 3 are increased, the impacted area is increased, the safety factor is increased, and the occurrence of serious tundish leakage accidents of the continuous casting tundish is prevented.
In the embodiment, the tundish is poured 833 times, the total number of furnaces is 2 ten thousand, and ladle overturning and steel leakage accidents do not occur; the service life of the upper impact plate reaches 200 furnaces, and 170 furnaces are cast more than the conventional furnace with 29 furnaces as the longest casting time.
Claims (2)
1. The utility model provides a prevent to turn over middle package end impact area structure of package which characterized in that: the dry-type material pouring device comprises an upper impact plate (2), a lower impact plate (3), pouring materials (9) and a middle cladding (5), wherein the upper impact plate (2), the lower impact plate (3), the pouring materials (9) and the middle cladding (5) are sequentially stacked from top to bottom for masonry, the upper surface of the upper impact plate (2) and the upper surface of a dry-type material working layer (1) of a pouring area (8) of a middle ladle are positioned on the same plane, and the size of the lower impact plate (3) is larger than that of the upper impact plate (2).
2. The tundish bottom impact zone structure preventing ladle overturning according to claim 1, wherein: the upper impact plate (2) and the lower impact plate (3) are rectangular plates, the upper surface of the upper impact plate (2) and the dry material working layer (1) of the tundish pouring area (8) are positioned on the same plane, and the length and the width of the lower impact plate (3) are respectively increased by 100-150mm compared with the length and the width of the upper impact plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020503605.3U CN212495364U (en) | 2020-04-09 | 2020-04-09 | Tundish bottom impact area structure for preventing ladle from turning over |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020503605.3U CN212495364U (en) | 2020-04-09 | 2020-04-09 | Tundish bottom impact area structure for preventing ladle from turning over |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212495364U true CN212495364U (en) | 2021-02-09 |
Family
ID=74432013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020503605.3U Expired - Fee Related CN212495364U (en) | 2020-04-09 | 2020-04-09 | Tundish bottom impact area structure for preventing ladle from turning over |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212495364U (en) |
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2020
- 2020-04-09 CN CN202020503605.3U patent/CN212495364U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210209 |