Continuous casting tundish

Abstract

The utility model relates to a continuous casting tundish, which belongs to the technical field of metal smelting and is characterized in that a tundish cover is detachably arranged on the top surface of the continuous casting tundish, at least three long nozzles are mounted on a mounting port on the top surface of the tundish cover, the long nozzles are communicated with a plurality of molten steel inlet directions, and molten steel is introduced into the tundish for flow stabilization. At least three intrusive water gaps are formed in the bottom of the tundish, molten steel flows out from three directions into a crystallizer, the amount of the molten steel entering a steel ladle is not limited any more, and the space of the tundish can be fully utilized; the long nozzle is detachably connected with the water outlet of the steel ladle through the connecting port, after the long nozzle is detached from the connecting port, the ladle cover is jacked up through the jacking air cylinder, the internal condition of the tundish and whether the erosion or sintering condition of dry materials is serious or not can be observed after jacking, and if the erosion or sintering condition is serious, the dry materials can be replaced and effectively treated.

Description

Technical Field

[0001] This utility model belongs to the field of metal smelting technology, specifically, it relates to a continuous casting tundish. Background Technology

[0002] The tundish is a refractory container between the continuous casting ladle and the crystallizer. With increasingly stringent quality requirements for steel, various ladle refining technologies have been developed to improve cleanliness and make the molten steel "cleaner." While molten steel refined outside the ladle can be considered "clean," it may be recontaminated after being poured into the tundish. Therefore, the tundish should not be viewed as a simple transition container for molten steel, but rather as a continuous metallurgical reactor. Measures used in ladle refining can be applied to the tundish to further purify the molten steel. This has led to the concept of tundish metallurgy, which has gained considerable attention.

[0003] In existing technologies, the use of tundishes is also limited due to the limited supply of molten steel. The amount of molten steel that can enter the tundish at one time is limited, and there is still a lot of spare space for refractory materials in the tundish. In order to ensure high-temperature resistance, the amount of refractory materials used in the tundish is large and the cost is high. If they cannot be fully utilized, it will easily lead to waste of resources. In addition, the dry charge layer of the tundish is subject to erosion after long-term use, especially the slag line area, which is difficult to treat. At the same time, dry charge sintering also presents difficulties in treatment. Summary of the Invention

[0004] To overcome the problems existing in the background technology, this utility model discloses a continuous casting tundish. The top surface of the tundish is detachably equipped with a tundish cover. At least three long nozzles are installed on the mounting port on the top surface of the tundish cover. Multiple molten steel inlet directions are connected at the long nozzles to ensure a stable flow of molten steel into the tundish. At least three immersion nozzles are provided at the bottom of the tundish, allowing molten steel to flow out from three directions into the crystallizer. The amount of molten steel entering the ladle is no longer limited, and the space of the tundish can be fully utilized. The long nozzles and the outlet of the ladle are detachably connected through a connection port. After being detached from the connection port, the tundish cover is lifted by a lifting cylinder. After being lifted, the internal condition of the tundish can be observed to see if the dry material erosion or sintering is severe. If severe, the dry material can be replaced to effectively treat the dry material.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] The continuous casting tundish is characterized in that it includes a tundish, a ladle cover, a long nozzle, an immersion nozzle, a tundish outer shell, a permanent layer, and a dry billet layer; the ladle cover is disposed on the top surface of the tundish, and an installation port is provided through the top surface of the ladle cover; the long nozzle is inserted into the top surface of the ladle cover from the installation port, and the top of the long nozzle is connected to the outlet of the molten steel ladle; the immersion nozzle is disposed on the bottom surface of the tundish, and the bottom of the immersion nozzle is inserted into the crystallizer, and the bottom of the crystallizer is connected to the billet outlet; the tundish includes a tundish outer shell, a permanent layer, and a dry billet layer, which are arranged from the outside to the inside to form the tundish.

[0007] As a preferred embodiment, it includes: a flap latch; the flap latch is located on the bottom surface of the flap and is inserted into the top opening of the middle bag for installation.

[0008] Preferably, the product includes: lifting cylinders; the lifting cylinders are located on the left and right sides of the bottom surface of the cover, and the lifting cylinders are hydraulic lifting cylinders;

[0009] Preferably, the intermediate cladding shell and permanent layer are integrally formed from thickened steel plates, and the dry material cladding layer is made of high-temperature resistant dry material.

[0010] Preferably, the combination of the intermediate package outer shell, permanent layer, and dry package layer has a wall thickness of at least 1100 mm.

[0011] As a preferred embodiment, the device includes a temperature probe; the temperature probe is located on the left side of the intermediate package, and a temperature display is connected to the outside of the temperature probe via a cable.

[0012] Preferably, the device includes a liquid level probe, which is located on the left side of the intermediate package, and a liquid level display is connected to the outside of the liquid level probe via a cable.

[0013] Preferably, the tundish includes a partition; the partition is disposed inside the tundish and is connected to the bottom surface of the tundish.

[0014] Preferably, the system includes a connection port; the connection port is located between the water outlet and the long water outlet, and the water outlet and the long water outlet are detachably connected.

[0015] The beneficial effects of this utility model are as follows: The top surface of the continuous casting tundish is detachably equipped with a tundish cover, and at least three long nozzles are installed on the mounting port on the top surface of the tundish cover. Multiple molten steel inlet directions are connected at the long nozzles, allowing molten steel to flow steadily into the tundish. At least three immersion nozzles are provided at the bottom of the tundish, allowing molten steel to flow out from three directions into the crystallizer. The amount of molten steel entering the ladle is no longer limited, and the space of the tundish can be fully utilized. The long nozzles and the outlet of the ladle can be detachably connected through a connection port. After detachment from the connection port, the tundish cover is lifted by a lifting cylinder. After lifting, the internal condition of the tundish can be observed to see if the dry material erosion or sintering is severe. If severe, the dry material can be replaced to effectively treat the dry material. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the bag's structure;

[0018] Figure 3 This is a schematic diagram of the structure of the intermediate packaging shell;

[0019] Figure 4 This is a schematic diagram of the internal structure of the intermediate package;

[0020] Figure 5 This is a structural diagram of the connection port.

[0021] In the diagram, 1 is the tundish, 2 is the tundish cover, 3 is the lifting cylinder, 4 is the mounting port, 5 is the long water inlet, 6 is the connection port, 7 is the water outlet, 8 is the immersion water inlet, 9 is the crystallizer, 10 is the billet outlet, 11 is the temperature display, 12 is the liquid level display, 13 is the tundish cover bayonet, 14 is the tundish outer shell, 15 is the permanent layer, 16 is the dry material bag layer, 17 is the working layer, 18 is the slag line, 19 is the molten slag, 20 is the baffle, 21 is the temperature probe, 22 is the liquid level probe, 23 is the upper pipe, 24 is the lower pipe, 25 is the threaded connection port, 26 is the connecting ring, 27 is the column, and 28 is the mounting platform. Detailed Implementation

[0022] To make the above objectives, technical solutions and beneficial effects clearer and more explicit, the present invention will be described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-5As shown, the continuous casting tundish 1 includes a tundish 1, a ladle cover 2, a long nozzle 5, a water outlet 7, an immersion nozzle 8, a crystallizer 9, and a billet outlet 10. A molten steel ladle is connected to the top of the tundish 1 via the water outlet 7, which has a connection port 6. The ladle cover 2 is snapped onto the top surface of the tundish 1, and a cover snap 13 is provided on the bottom surface of the cover 2. The cover snap 13 is inserted into the open top of the tundish 1. An installation port 4 is provided through the top surface of the cover 2. The long nozzle 5 is inserted into the tundish 1 from the installation port 4. An immersion nozzle 8 is connected to the bottom surface of the tundish 1, and its bottom is inserted into the crystallizer 9. The bottom of the crystallizer 9 is connected to the billet outlet 10. The tundish 1 receives the molten steel poured from the ladle and then distributes it to each crystallizer 9, thus stabilizing the flow.

[0024] The tundish 1 includes an outer shell 14, a permanent layer 15, a dry material ladle layer 16, and a working layer 17. The outer shell 14, permanent layer 15, dry material ladle layer 16, and working layer 17 are arranged from the outside to the inside to form the tundish 1. The slag line 18 and molten slag 19 are located inside the tundish 1. The outer shell 14 and permanent layer 15 are integrally formed as thickened steel plates. The dry material ladle layer 16 is equipped with high-temperature resistant dry material. The working layer 17 is the inner layer of the dry material ladle layer 16 that is in contact with the molten steel. The combination of the outer shell 14, permanent layer 15, and dry material ladle layer 16 has a wall thickness of at least 1100 mm. The dry material is selected from 97 magnesia dry material.

[0025] A temperature probe 21 is installed on the left side of the tundish 1. A temperature display 11 is connected to the outside of the temperature probe 21 via a cable. A liquid level probe 22 is installed on the right side of the tundish 1. The temperature probe 21 is made of high-temperature resistant material and is used to detect the temperature of the molten steel in the tundish 1 for real-time monitoring. The liquid level probe 22 is connected to the outside of the liquid level display 12 via a cable. The liquid level probe 22 is used to detect the liquid level near the slag line 18 for easy control of molten steel leakage. A baffle is installed inside the tundish 1, which can stabilize the flow.

[0026] A connection port is provided between the outlet 7 and the long outlet 5. The connection port is divided into an upper pipe body 23 and a lower pipe body 24. A threaded connection port 25 is provided at the bottom of the upper pipe body 23 and at the top of the lower pipe body 24. A connection port 6 is installed on the outer periphery of the two threaded connection ports 25. The outlet 7 and the long outlet 5 are detachably connected. When disassembly is required, the connection port 6 can be rotated with the help of an auxiliary tool for disassembly. A lifting cylinder 3 is provided at the bottom of the cover 2. The lifting cylinder 3 is a hydraulic lifting cylinder 3. After disassembly from the connection port 6, the cover 2 is lifted by the lifting cylinder 3 to process the inside of the intermediate ladle 1. In the steelmaking plant area, it is generally set on the column 27, installed between two columns 27 in the middle. An installation platform 28 is set on the side of the two columns 27, and the lifting cylinder 3 is on the top surface of the installation platform 28.

[0027] When using the aforementioned continuous casting tundish for steel flow separation, the tundish 1 is installed below the molten steel ladle, and the stability of the installation is checked. After installation, steel flow separation is initiated. During this process, the temperature display 11 and the liquid level display 12 should be monitored in real time to control the flow rate of the molten steel. A water outlet control valve is generally installed at the bottom outlet 7 of the molten steel. At least three long nozzles 5 are installed on the top of the ladle cover 2, allowing molten steel to flow in from three directions within the tundish 1. After warming, the molten steel enters the crystallizer 9 through the immersion nozzle 8 at the bottom of the tundish 1 and exits through the billet outlet 10 at the bottom of the crystallizer 9. At least three immersion nozzles 8 are provided at the bottom of the tundish 1, which are connected to at least three crystallizers 9. This can effectively improve the billet output efficiency. After billet output and cooling, the tundish 1 is disassembled from the connection port. The top cover is lifted by the lifting cylinder to observe the internal condition of the tundish 1. If the dry material layer 16 can no longer be used due to erosion or sintering, the dry material layer 16 can be knocked off and then re-laid for subsequent use. This can effectively extend the service life of the tundish 1. In addition, the recycled dry material can be reused in other high-temperature environments with less demanding requirements, thus avoiding resource waste.

[0028] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A continuous casting tundish, characterized by, It comprises a tundish, a tundish cover, a long nozzle, an invasive nozzle, a tundish shell, a permanent layer and a dry material layer. The tundish cover is arranged on the top surface of the tundish, the top surface of the tundish cover is provided with a mounting hole, the long nozzle is inserted into the top surface of the tundish cover from the mounting hole, the top of the long nozzle is communicated with the water outlet of the ladle, the invasive nozzle is arranged on the bottom surface of the tundish, the bottom of the invasive nozzle is inserted into the crystallizer, and the bottom of the crystallizer is communicated with the outlet. The tundish comprises a tundish shell, a permanent layer and a dry material layer.

2. A continuous casting tundish according to claim 1, characterized in that: It comprises: The tundish cover is arranged on the top surface of the tundish, the top surface of the tundish cover is provided with a mounting hole, the long nozzle is inserted into the top surface of the tundish cover from the mounting hole, the top of the long nozzle is communicated with the water outlet of the ladle, the invasive nozzle is arranged on the bottom surface of the tundish, the bottom of the invasive nozzle is inserted into the crystallizer, and the bottom of the crystallizer is communicated with the outlet.

3. A continuous casting tundish according to claim 1, characterized in that: It comprises: The lifting oil cylinder is arranged on the left and right sides of the bottom surface of the tundish cover, and the lifting oil cylinder is a hydraulic lifting oil cylinder.

4. A continuous casting tundish according to claim 1, characterized in that: The tundish shell and the permanent layer are integrally formed into a thickened steel plate, and the dry material layer is a high-temperature-resistant dry material.

5. A continuous casting tundish according to claim 4, characterised in that: The tundish shell, the permanent layer and the dry material layer are combined to have a wall thickness of at least 1100 mm.

6. A continuous casting tundish according to claim 1, characterized in that: It comprises: The temperature probe is arranged on the left side of the tundish, and the temperature display is connected to the outside of the temperature probe through a cable.

7. A continuous casting tundish according to claim 1, characterized in that: It comprises:

8. A continuous casting tundish according to claim 1, characterized in that: The partition plate is arranged in the tundish, and the partition plate is connected with the bottom surface of the tundish. It comprises: The connecting hole is arranged between the water outlet and the long nozzle, and the water outlet and the long nozzle are detachably connected.

9. A continuous casting tundish according to claim 1, characterized in that: ​ ​ ​

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