A multifunctional turbulator for symmetrical operation tundish
By designing a multifunctional turbulence device, the slag stopping, steady flow and protection functions of traditional tundra prefabricated parts are integrated into one prefabricated part, which solves the problem of a wide variety of symmetrical work tundra prefabricated parts, and reduces the types of prefabricated parts and improves the efficiency of use.
Patent Information
- Application Number
- CN202411924777.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-04-01
AI Technical Summary
In the steel and metallurgy industry, there are many types of traditional tundra prefabricated parts, especially symmetrical operation tundra prefabricated parts, which leads to great inconvenience in production, management and use.
Design a multi-functional turbulence device. Through integrated design ideas, the functions of slag stopping, steady flow and protective working layer are integrated into one prefabricated part, using an inverted casting mode and a single-time prefabricated aluminum or magnesium castable to reduce the types of prefabricated parts.
The reduction of traditional 7 prefabricated parts to 2 is achieved, which simplifies production, management and use, improves the efficiency of prefabricated parts, and effectively prevents the erosion of the side walls of the steel and the early entry of slag.
Smart Images
Figure CN119733820A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of parts of general heat exchange or heat transfer equipment, and in particular to a multifunctional turbulator for a symmetrically operating tundish. Background Art
[0002] At present, in the iron and steel metallurgical industry, the continuous casting tundish is the last container where the molten steel stays. After a short stay in the tundish, the molten steel is converted into billets through the continuous casting machine. Traditionally, in order to prevent the slag from entering the pouring area at the beginning of pouring, a slag blocking prefabricated part is required between the molten steel injection area and the tundish pouring area to effectively separate the initial slag and molten steel; Inclusions in molten steel need to complete the final floating in the tundish, so a prefabricated part that stabilizes the flow field of molten steel needs to be set up to constrain the flow field in a certain area to ensure the stability of the flow field in the molten steel pouring area. However, due to the installation of slag blocking and flow stabilizing prefabricated parts, the slag and flow field are locked in a narrow molten steel injection area, causing the working layer of the tundish wall to be eroded by slag and washed by flowing molten steel at the same time, resulting in premature damage to the working layer of the tundish wall. For this reason, protective prefabricated parts need to be installed for the working layer, resulting in a wide variety of prefabricated parts used in traditional tundishes, and the number of prefabricated parts for symmetrically operated tundishes is doubled, which brings great inconvenience to the actual production, management and use of prefabricated parts. Therefore, in order to solve the problem of many types of symmetrical operation tundish prefabricated parts, the turbulator adopts an integrated design concept. By using one prefabricated part, the purpose of slag blocking, flow field stabilization and working layer protection can be achieved at the same time. Generally speaking, the prefabricated components such as slag retaining wall, turbulator, guard plate, retaining dam, etc. used in continuous casting tundish are designed and manufactured separately, and they can be combined on site to achieve the purpose of slag retaining, stabilizing flow, protecting working lining and permanent lining. This makes the prefabricated components various, which is not conducive to organizing production and use management; The present invention can mainly solve the problem of many types of symmetrical operation tundish prefabricated parts. Summary of the invention
[0003] In order to solve the above technical problems, the present invention provides a multifunctional turbulator for a symmetrically operating tundish to solve the problems described in the above background technology.
[0004] The purpose and efficacy of the multifunctional turbulator for a symmetrically operating ladle of the present invention are achieved by the following specific technical means: a multifunctional turbulator for a symmetrically operating ladle, the turbulator is divided into three sections from bottom to top, the first section is the part below the internal bottom plate, called the impact zone; the second section is from the internal bottom plate to the first step, called the steady flow zone; the third section is from the first step to the top surface of the preform, called the slag retaining and side wall protection zone.
[0005] Furthermore, a circular machine-pressed impact plate with excellent anti-scouring performance is embedded in the impact area. The diameter of the machine-pressed impact plate is larger than the diameter of the internal bottom plate. The designed thickness is determined according to the service life of the turbulator, and it is cast together with aluminum or magnesium castables during molding.
[0006] Furthermore, the side wall of the turbulent zone is provided with a side wall guard plate, and the side arm guard plate adopts a recessed arc design with an arc length design radius of φa, and a straight opening with a height of b on the upper part of the arc, which can lock the flow field of the molten steel in the opening area of the turbulent zone.
[0007] Furthermore, the slag blocking area is provided with a slag blocking wall, and two guide holes are arranged at the position of the slag blocking wall facing the pouring area. The guide holes are low inside and high outside, with a diameter of φc and an inclination angle of a°.
[0008] Furthermore, the slag retaining wall is provided with two guide holes, the angle between the longitudinal surface of the guide hole and the side wall is 35.99°, the guide hole is designed to be low inside and high outside, and the angle with the horizontal is 38°-45°, which can effectively separate the slag from the molten steel.
[0009] Beneficial effects: 1. The turbulent flow stabilization function of the turbulator, the slag retaining function of the slag retaining wall, and the protective function of the guard plate are integrated to design and manufacture an integral multifunctional turbulator. The turbulator is designed as a whole and is prefabricated in one go in an inverted casting mode using aluminum or magnesium castables in a steel mold, reducing the types of prefabricated parts used in symmetrical operation tundishes from 7 to 2, thereby facilitating actual production, management, and on-site use; 2. The overall type optimizes the design of the steady flow zone, and a strip-shaped protrusion is added to the internal bottom plate to prevent the vertical rebound of the molten steel when the first furnace is poured; and the side wall of the steady flow zone adopts a concave design, and the square straight mouth design can lock the flow field of the molten steel injected into the tundish within the range of the steady flow zone, reducing the erosion of the molten steel on the side wall; 3. A slag retaining area is provided, and the side wall facing the pouring area is a slag retaining wall of a flow stabilizer. Two diversion holes are provided on the slag retaining wall. After optimized design, the diversion holes can effectively separate the initial slag and molten steel; 4.An anti-seepage groove is set at the contact position of the working layer of the bottom and wall of the ladle, which can increase the contact area between the working layer and the prefabricated part and prevent the molten steel from penetrating into the permanent layer during the pouring process, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0011] Figure 2 It is a bottom view schematic diagram of the turbulator of the present invention.
[0012] Figure 3 It is a schematic diagram of the turbulator of the present invention when viewed from above.
[0013] Figure 4 It is a schematic diagram of the installation of the turbulator and the continuous casting butterfly-type tundish of the present invention.
[0014] Figure 5 It is a side plan view of the turbulator of the present invention.
[0015] Figure 6 It is a cross-sectional view of the guide hole of the turbulator of the present invention.
[0016] Figure 1-6 In the figure, the corresponding relationship between the component names and the figure numbers is as follows: 1-slag retaining wall, 2-side wall guard plate, 3-machine pressure impact plate. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Example
[0018] As attached Figure 1 To Attachment Figure 6 As shown: Embodiment 1: A multifunctional turbulator for a symmetrically operated tundish, the turbulator is divided into three sections from bottom to top, the first section is the part below the inner bottom plate, called the impact zone; the second section is from the inner bottom plate to the first step, called the steady flow zone; the third section is from the first step to the top surface of the preform, called the slag blocking and side wall protection zone; A circular mechanical impact plate 3 with excellent anti-scouring performance is embedded in the impact area. The diameter of the mechanical impact plate 3 is larger than the diameter of the inner bottom plate. The designed thickness is determined according to the service life of the turbulator. The mechanical impact plate 3 is cast together with aluminum or magnesium castable during molding. The side wall of the turbulent zone is provided with a side wall guard plate 2, the side arm guard plate 2 adopts a concave arc design, the arc length design radius is φa, and there is a straight opening with a height of b on the upper part of the arc, which can lock the flow field of the molten steel in the opening area of the turbulent zone; The slag retaining area is provided with a slag retaining wall 1, and two diversion holes are arranged at the position of the slag retaining wall 1 facing the pouring area. The diversion holes are low inside and high outside, with a diameter of φc and an inclination angle of a°; In conjunction with the instruction manual Figure 3 It can be seen that the slag retaining wall 1 is provided with two guide holes, see the attached manual Figure 6It can be seen that the angle between the longitudinal surface of the diversion hole and the side wall is 35.99°. The diversion hole is designed to be low inside and high outside, with an angle of 38°-45° with the horizontal, which can effectively separate the slag from the molten steel. Among them: the turbulator is suitable for paired continuous casting butterfly-shaped tundishes. It is placed in the impact zone of the butterfly-shaped tundish and has multiple functions of preventing molten steel from rebounding, stabilizing the flow field, preventing slag from entering the non-impact zone too early, and protecting the permanent layer and the working layer; The bottom plate of the steady flow area is designed with strip-shaped protrusions, the arc diameter of which is two-thirds of the diameter of the molten steel injection flow, which can disperse the molten steel injection flow to the surrounding of the turbulator bottom plate, thereby eliminating the vertical rebound of the molten steel when pouring begins; The slag retaining area is provided with a slag retaining wall 1, and two diversion holes are arranged at the position of the slag retaining wall 1 facing the pouring area. The diversion holes are low inside and high outside, with a diameter of φc and an inclination angle of a°. The U-tube principle is used to effectively separate the slag and molten steel when pouring. The side wall guard plate 2 and the bottom plate where the turbulator contacts the dry material in the working layer are both provided with anti-seepage grooves with a radius of cmm. By increasing the contact area with the dry material, the molten steel is prevented from infiltrating during the steel pouring process. Reference Manual Attached Figure 4 It can be learned that when installing, the turbulator is directly placed against the corner of the impact zone of the permanent layer of the tundish wall. The surface of the turbulator in contact with the working layer is provided with a groove of anti-seepage steel to increase the contact area with the working lining and prevent steel seepage when the tundish is poured. Example
[0019] The functions of slag blocking, flow field stabilization and working lining protection of the symmetrical working tundish preform are integrated into one preform, which reduces the types of symmetrical working tundish preforms used, and reduces the types of preforms traditionally used from 7 to 2, thus facilitating actual production, management and on-site use; The overall type optimizes the design of the steady flow area, and adds a strip-shaped protrusion at the position of the internal bottom plate to prevent the vertical rebound of the molten steel when the first furnace is poured; and the side wall of the steady flow area adopts a concave design, and the square straight mouth design can lock the flow field of the molten steel injected into the tundish within the range of the steady flow area, reducing the erosion of the molten steel on the side wall; By setting up a slag retaining area, the side wall of which facing the pouring area is a slag retaining wall of a flow stabilizer, and two diversion holes are arranged on the slag retaining wall. After optimized design, the diversion holes can effectively separate the initial slag and molten steel; The anti-seepage grooves are set at the contact position between the working layer of the bottom and the wall of the ladle, which can increase the contact area between the working layer and the prefabricated parts and prevent the molten steel from penetrating into the permanent layer during the pouring process, which is safe and reliable. Example
[0020] The slag retaining wall, flow stabilizer and guard plate prefabricated parts used in the traditional tundish are integrated into a whole through integrated design ideas, which greatly simplifies the types of tundish prefabricated parts used. Through this design, the number of symmetrical tundish prefabricated parts used is reduced from 7 types to 2 types. The side wall of the steady flow zone adopts a concave design and is provided with a straight opening, which can lock the molten steel flow field within the range of the steady flow zone and reduce the scouring of the flow field on the three side walls.
Claims
1. A multifunctional turbulator for symmetrical operation tundish, characterized by: include The turbulator is divided into three sections from bottom to top. The first section is the part below the internal bottom plate, which is called the impact zone; the second section is from the internal bottom plate to the first step, which is called the steady flow zone; the third section is from the first step to the top surface of the prefabricated part, which is called the slag blocking and side wall protection zone; The turbulator is suitable for a pair of continuous casting butterfly-type tundishes and is arranged at the impact zone of the butterfly-type tundish.
2. The multifunctional turbulator for symmetrical operation tundish according to claim 1, characterized in that: A circular mechanical impact plate (3) with excellent anti-scouring performance is embedded in the impact zone. The diameter of the mechanical impact plate (3) is greater than the diameter of the inner bottom plate. The designed thickness is determined according to the service life of the turbulator. The mechanical impact plate (3) is cast together with aluminum or magnesium castable during molding.
3. The multifunctional turbulator for symmetrical operation tundish according to claim 1, characterized in that: The bottom plate in the steady flow area is designed with a strip-shaped protrusion, and the arc diameter is two-thirds of the diameter of the molten steel injection flow.
4. The multifunctional turbulator for symmetrical operation tundish according to claim 1, characterized in that: The side wall of the turbulent zone is provided with a side wall guard plate (2), the side arm guard plate (2) adopts a concave arc design, the arc length design radius is φa, and the upper part of the arc has a straight opening with a height of b, which can lock the flow field of the molten steel in the opening area of the turbulent zone.
5. The multifunctional turbulator for symmetrical operation tundish according to claim 1, characterized in that: The slag blocking area is provided with a slag blocking wall (1), and two guide holes are provided at a position of the slag blocking wall (1) facing the pouring area, the guide holes being lower inside and higher outside, having a diameter of φc and an inclination angle of a°.
6. The multifunctional turbulator for symmetrical operation tundish according to claim 1, characterized in that: The side wall guard plate (2) and the bottom plate where the turbulator contacts the working layer dry material are both provided with anti-seepage grooves, and the radius of the anti-seepage groove is c (mm).
7. The multifunctional turbulator for symmetrical operation tundish according to claim 1, characterized in that: The turbulator is made of aluminum or magnesium casting material and is prefabricated in a steel mold by an inverted vibration molding method.