Continuous casting tundish
By setting preheating holes and seals in the continuous casting tundra and using high-temperature waste gas baking flow steel channels, the problems of energy waste and high production costs in the prior art are solved, and energy consumption and production costs are reduced.
Patent Information
- Application Number
- CN202421769798.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-25
AI Technical Summary
In the existing metallurgical steelmaking technology, baking flow steel channels requires a large amount of energy consumption, resulting in energy waste and high production costs.
A continuous cast tundra is designed, by setting a preheating hole on the tundra cover and sealing the plug rod hole and the preheating hole with a seal, the high-temperature exhaust gas generated by the baking bar mouth is baked through the flow steel channel, and energy consumption is reduced using waste heat.
It effectively reduces energy consumption during the baking process of flow steel channels, reduces production costs, and avoids the problems of cold steel blockage and hydrogen exceeding the standard.
Smart Images
Figure CN222856710U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metallurgy and steelmaking, in particular to a continuous casting tundish. Background Art
[0002] The tundish is a refractory container used in short-process steelmaking. It first receives the molten steel poured from the ladle, and then distributes it to each crystallizer through the tundish water outlet. The tundish includes a steel flow channel, which is a channel for the molten steel to flow and heat. The steel flow channel is made of refractory material and needs to be baked and heated before use to remove moisture. Otherwise, the channel may be blocked by cold steel and production may be interrupted, or the hydrogen content of the ingot may exceed the standard. In the prior art, a specific heating device is used to bake the steel flow channel, which wastes energy.
[0003] Therefore, how to reduce energy consumption while satisfying the requirement of baking the convection steel channel has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content
[0004] In view of this, the purpose of the utility model is to provide a continuous casting tundish for baking the convection steel channel while reducing energy consumption.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A continuous casting tundish, comprising:
[0007] The tundish body includes an impact zone and a casting strand zone, and the impact zone is connected with the casting strand zone through a steel flow channel;
[0008] The tundish cover is arranged on the tundish body, and is provided with a stopper hole and a preheating hole, both of which are connected to the casting strand area, and the preheating hole is used to place a baking burner;
[0009] A stopper rod, the stopper rod is arranged in the stopper rod hole;
[0010] Seal: The seal is used to seal the stopper hole and the preheating hole.
[0011] Optionally, in the above continuous casting tundish, the steel flow channel includes a first steel flow channel and a second steel flow channel that are symmetrically arranged, and the first steel flow channel and the second steel flow channel are respectively arranged on both sides of the impact zone.
[0012] Optionally, in the above-mentioned continuous casting tundish, the steel flow channel includes a channel inlet and a channel outlet, the height of the channel outlet is higher than the height of the channel inlet, and the inclination angle of the steel flow channel relative to the horizontal direction is 3°.
[0013] Optionally, in the above-mentioned continuous casting tundish, the channel outlet includes a first channel outlet and a second channel outlet, the axis of the first channel outlet is perpendicular to the axis of the channel inlet, and the angle between the axis of the second channel outlet and the axis of the channel inlet is 110°.
[0014] Optionally, in the above continuous casting tundish, the length of the steel flow channel is 1750 mm; and / or,
[0015] The apertures of the channel inlet and the channel outlet are both 160 mm.
[0016] Optionally, in the above-mentioned continuous casting tundish, the steel flow channel includes a channel outer wall and a through channel arranged in the channel outer wall, the cross-sectional shape of the channel outer wall is trapezoidal or rectangular, and the cross-sectional shape of the through channel is circular or elliptical.
[0017] Optionally, in the above-mentioned continuous casting tundish, the material of the sealing member is asbestos material or ceramic fiber or rock wool or aluminum silicate fiber.
[0018] Optionally, in the above-mentioned continuous casting tundish, the seal is a split structure.
[0019] Optionally, in the above-mentioned continuous casting tundish, the seal is formed by splicing a plurality of sealing structures, and the plurality of sealing structures are spliced to form circular holes matching the sizes of the stopper rod hole and the preheating hole.
[0020] Optionally, in the above-mentioned continuous casting tundish, the shape of the sealing structure is arc-shaped or square-shaped, and the multiple sealing structures are connected by snap-fitting or bonding.
[0021] The continuous casting tundish disclosed in the embodiment of the utility model seals the stopper rod hole and the preheating hole by arranging a sealing member, so that when the baking burner bakes the casting flow zone, the high-temperature exhaust gas generated is discharged from the impact zone through the flow steel channel, thereby baking the flow steel channel. The high-temperature exhaust gas generated by the baking of the tundish can be used to utilize waste heat, reduce energy consumption, and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 A schematic diagram of the composition of the tundish disclosed in the embodiment of the utility model;
[0024] Figure 2A schematic diagram of the tundish baking disclosed in the embodiment of the utility model;
[0025] Figure 3 It is a structural schematic diagram of the steel flow channel disclosed in the embodiment of the utility model;
[0026] Figure 4 It is a structural schematic diagram of a channel outlet of a steel flow channel disclosed in an embodiment of the utility model;
[0027] Figure 5 A cross-sectional view of a channel entrance of a steel flow channel disclosed in an embodiment of the utility model;
[0028] Figure 6 This is a cross-sectional view of the channel outlet of the steel flow channel disclosed in an embodiment of the utility model.
[0029] Among them, 10 is the impact zone, 20 is the casting zone, 21 is the first casting zone, 22 is the second casting zone, 23 is the third casting zone, 30 is the flow steel channel, 301 is the channel entrance, 302 is the channel exit, 3021 is the first channel exit, 3022 is the second channel exit, 3001 is the channel outer wall, 3002 is the through channel, 31 is the first flow steel channel, and 32 is the second flow steel channel. DETAILED DESCRIPTION
[0030] The core of the utility model is to disclose a continuous casting tundish, which bakes the convection steel channel and reduces energy consumption.
[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] like Figure 1 As shown, an embodiment of the utility model discloses a continuous casting tundish, comprising a tundish body, a tundish cover, a stopper rod and a sealing member.
[0033] Among them, Figure 1-Figure 2As shown, the tundish body includes an impact zone 10 and a casting strand zone 20, and the impact zone 10 is connected to the casting strand zone 20 through a steel flow channel 30. When molten steel is poured, the molten steel is first poured into the impact zone 10, and then the molten steel in the impact zone 10 flows to the casting strand zone 20 through the steel flow channel 30. The tundish cover is arranged on the tundish body, and a stopper rod hole and a preheating hole are arranged on the tundish cover. The stopper rod is arranged in the stopper rod hole. The stopper rod is mainly used to control the flow of molten steel. The stopper rod hole and the preheating hole are both connected to the casting strand zone 20. The preheating hole is used to place a baking burner. Baking is required before the tundish is poured. The baking burner is placed in the casting strand zone 20 through the preheating hole, and then ignited to bake the tundish. The exhaust gas temperature generated after the flame combustion exceeds 1200°C, and the baking time generally takes 2.5h-4h.
[0034] In order to prevent the flame from escaping through the stopper hole and the preheating hole when the tundish is baked, and to prevent the high-temperature exhaust gas from flowing out through the stopper hole and the preheating hole, the convection steel channel 30 is baked using the high-temperature exhaust gas, and a seal is provided to seal the stopper hole and the preheating hole. The high-temperature exhaust gas generated by the baking nozzle of the casting zone 20 can only be discharged from the impact zone 10 through the convection steel channel 30. Therefore, the convection steel channel 30 can be baked, and the temperature of the convection steel channel 30 can reach above 1000°C after baking. Figure 2 The arrows in the figure indicate the flow direction of the high-temperature exhaust gas. It should be noted that the specific type of the seal is not limited, as long as it can seal the stopper hole and the preheating hole. In actual operation, after the seal is set, there is no cold steel blockage when the first furnace of the tundish is poured, and the hydrogen content of the molten steel in the first furnace of the tundish is less than 1.8ppm.
[0035] The continuous casting tundish disclosed in the embodiment of the utility model seals the stopper rod hole and the preheating hole by arranging a sealing member, so that when the baking burner bakes the casting flow zone 20, the high-temperature exhaust gas generated is discharged from the impact zone 10 through the flow steel channel 30, thereby baking the flow steel channel 30. The high-temperature exhaust gas generated by the baking of the tundish can be used to utilize waste heat, reduce energy consumption, and reduce production costs.
[0036] like Figure 1 and Figure 2 As shown, in the continuous casting tundish disclosed in the embodiment of the utility model, the flow steel channel 30 includes a first flow steel channel 31 and a second flow steel channel 32 which are symmetrically arranged, and the first flow steel channel 31 and the second flow steel channel 32 are respectively arranged on both sides of the impact zone 10. The arrangement of the first flow steel channel 31 and the second flow steel channel 32 can divert the molten steel and achieve uniform distribution of the molten steel flow.
[0037] In some specific embodiments, Figure 1As shown, the casting strand zone 20 includes a first casting strand zone 21 , a second casting strand zone 22 and a third casting strand zone 23 which are connected in sequence, a first strand steel channel 31 connects the impact zone 10 and the first casting strand zone 21 , and a second strand steel channel 32 connects the impact zone 10 and the third casting strand zone 23 .
[0038] like Figure 3-Figure 6 As shown, the steel flow channel 30 includes a channel inlet 301 and a channel outlet 302. The height of the channel outlet 302 is higher than the height of the channel inlet 301, and the inclination angle of the steel flow channel 30 relative to the horizontal direction is 3°, that is, the steel flow channel 30 is inclined upward by 3° as a whole. The advantage of this arrangement is that an upward molten steel flow is formed at the channel outlet 302, which is conducive to the floating and removal of inclusions, and at the same time, the molten steel flow at the channel outlet 302 can be prevented from scouring the bottom of the casting zone 10.
[0039] like Figure 4 As shown, in order to avoid the formation of a dead zone in the molten steel in the ladle, in some specific embodiments, the channel outlet 302 includes a first channel outlet 3021 and a second channel outlet 3022, and the axis of the first channel outlet 3021 is perpendicular to the axis of the channel inlet 301, that is, the axis direction of the first channel outlet 3021 is perpendicular to the flow direction of the molten steel flow, and the angle between the axis of the second channel outlet 3022 and the axis of the channel inlet 301 is 110°, that is, the angle between the axis of the second channel outlet 3022 and the flow direction of the molten steel flow is 110°.
[0040] In the continuous casting tundish disclosed in the embodiment of the utility model, the length of the steel flow channel 30 is 1750 mm, the length from the channel inlet 301 to the channel outlet 302 (here refers to the distance from the axis of the channel inlet 301 to the first channel outlet 3021) is 1550 mm, the apertures of the channel inlet 301 and the channel outlet 302 are both 160 mm, and the apertures of the first channel outlet 3021 and the second channel outlet 3022 are both 160 mm.
[0041] like Figure 3-Figure 4 As shown, in the continuous casting tundish disclosed in the embodiment of the utility model, the steel flow channel 30 includes a channel outer wall 3001 and a through channel 3002 arranged in the channel outer wall. The cross-sectional shape of the channel outer wall 3001 is a trapezoid. For the convenience of installation, the cross-sectional shape is a general trapezoid, such as Figure 5-Figure 6 As shown. The cross-sectional shape of the through channel 3002 is circular. It should be noted that the shape of the channel outer wall 3001 here can also be other shapes, such as a rectangle, the cross-sectional shape of the through channel 3002 can also be other shapes, such as an ellipse, and the number of through channels 3002 can be more than one, such as two, to facilitate the diversion of steel water.
[0042] In the continuous casting tundish disclosed in the embodiment of the utility model, the material of the seal is asbestos material or ceramic fiber or rock wool or aluminum silicate fiber, as long as the material type is fire-resistant and high-temperature resistant. In order to facilitate the sealing of the stopper rod hole and the preheating hole, the seal is preferably a split structure, and the seal can be spliced by multiple sealing structures, and the multiple sealing structures are spliced to form a circular hole that matches the size of the stopper rod hole and the preheating hole. Specifically, the shape of the multiple sealing structures can be arc or square or other shapes, and the multiple sealing structures can be spliced by snap connection or bonding connection. For example, the seal can be spliced by two sealing structures, one of which is provided with a protrusion, and the other sealing structure is provided with a groove that matches the protrusion, and the two sealing structures are snap-connected. When the bonding connection method is adopted, it is necessary to use a high-temperature resistant sealant to ensure the firmness of the connection of the sealing structure.
[0043] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0044] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.
[0045] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.
[0046] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.
Claims
1. A continuous casting tundish, characterized in that: include: A tundish body, the tundish body comprising an impact zone (10) and a casting strand zone (20), the impact zone (10) being connected to the casting strand zone (20) via a steel flow channel (30); a tundish cover, the tundish cover being arranged on the tundish body, the tundish cover being provided with a stopper hole and a preheating hole, the stopper hole and the preheating hole both being in communication with the casting strand zone (20), the preheating hole being used for placing a baking burner; a stopper rod, the stopper rod being disposed in the stopper rod hole; A sealing member is used for sealing the stopper rod hole and the preheating hole.
2. The continuous casting tundish according to claim 1, characterized in that: The steel flow channel (30) comprises a first steel flow channel (31) and a second steel flow channel (32) which are symmetrically arranged, and the first steel flow channel (31) and the second steel flow channel (32) are respectively arranged on both sides of the impact zone (10).
3. The continuous casting tundish according to claim 2, characterized in that: The steel flow channel (30) comprises a channel inlet (301) and a channel outlet (302); the height of the channel outlet (302) is higher than the height of the channel inlet (301); and the inclination angle of the steel flow channel (30) relative to the horizontal direction is 3°.
4. The continuous casting tundish according to claim 3, characterized in that: The channel outlet (302) comprises a first channel outlet (3021) and a second channel outlet (3022), the axis of the first channel outlet (3021) being perpendicular to the axis of the channel inlet (301), and the angle between the axis of the second channel outlet (3022) and the axis of the channel inlet (301) being 110°.
5. The continuous casting tundish according to claim 3, characterized in that: The length of the steel flow channel (30) is 1750 mm; and / or, The apertures of the channel inlet (301) and the channel outlet (302) are both 160 mm.
6. The continuous casting tundish according to claim 2, characterized in that: The steel flow channel (30) comprises a channel outer wall (3001) and a through channel (3002) arranged in the channel outer wall, the cross-sectional shape of the channel outer wall (3001) is trapezoidal or rectangular, and the cross-sectional shape of the through channel (3002) is circular or elliptical.
7. The continuous casting tundish according to any one of claims 1 to 6, characterized in that: The material of the sealing element is asbestos material, ceramic fiber, rock wool or aluminum silicate fiber.
8. The continuous casting tundish according to claim 7, characterized in that: The sealing element is a split structure.
9. The continuous casting tundish according to claim 8, characterized in that: The sealing member is formed by splicing a plurality of sealing structures, and the plurality of sealing structures are spliced to form circular holes respectively matching the sizes of the stopper rod hole and the preheating hole.
10. The continuous casting tundish according to claim 9, characterized in that: The sealing structure is in an arc or square shape, and a plurality of the sealing structures are connected by snapping or bonding.