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CN-122012872-A - Emergency accident pit for vacuum degassing furnace and construction method thereof

CN122012872ACN 122012872 ACN122012872 ACN 122012872ACN-122012872-A

Abstract

The invention relates to the technical field of steelmaking production, in particular to an emergency accident pit for a vacuum degassing furnace and a construction method thereof. The emergency accident pit comprises a pit body, a bottom wall module, a side wall module and a filling block, wherein the pit body is provided with a cylindrical containing cavity with an open top, the bottom wall module is paved on the bottom surface of the cylindrical containing cavity, the side wall module is attached to the inner side surface of the cylindrical containing cavity, the side wall module extends upwards from the bottom wall module, the bottom wall module comprises precast blocks and the filling block, the precast blocks are paved on the bottom surface of the cylindrical containing cavity, gaps are reserved between any two adjacent precast blocks, and the filling block is embedded in the gaps and is used for connecting the adjacent precast blocks. In the invention, the bottom wall module is formed by splicing the precast blocks and the filling blocks, and the construction is completed by paving the precast blocks and then pouring the filling blocks, so that the surface of the emergency accident pit has higher flatness, the integrity of the emergency accident pit can be improved, and the heat insulation performance of the emergency accident pit can be improved.

Inventors

  • QIN WENPENG
  • WANG WEIWEI
  • ZHU JINGRAN
  • ZHANG HAO
  • DONG ZHANCHUN
  • WANG XING

Assignees

  • 北京联合荣大工程材料股份有限公司

Dates

Publication Date
20260512
Application Date
20260331

Claims (10)

  1. 1. An emergency pit for a vacuum degassing furnace, comprising: a pit body (100), the pit body (100) having a cylindrical cavity with an open top; the bottom wall module (200) is laid on the bottom surface of the cylindrical cavity; the side wall module (300) is attached to the inner side surface of the cylindrical cavity, and the side wall module (300) extends upwards from the bottom wall module (200); The bottom wall module (200) comprises prefabricated blocks (210) and filling blocks (220), wherein a plurality of prefabricated blocks (210) are tiled on the bottom surface of the cylindrical cavity, gaps are formed between any two adjacent prefabricated blocks (210), and the filling blocks (220) are embedded in the gaps and are used for connecting the adjacent prefabricated blocks (210).
  2. 2. Emergency event pit for a vacuum degassing furnace according to claim 1, characterized in that the prefabricated block (210) is provided with a wedge-shaped portion (211) extending along the edge of the plate surface thereof, the sharp edge of the wedge-shaped portion (211) being centrally arranged between the two plate surfaces of the prefabricated block (210) such that the gap width between adjacent prefabricated blocks (210) varies with the oblique side surfaces of the wedge-shaped portion (211).
  3. 3. Emergency event pit for a vacuum degassing furnace according to claim 1 or 2, further comprising: the concrete platforms (400) are connected with the inner side surface of the cylindrical cavity and are higher than the side wall modules (300), and the four concrete platforms (400) are symmetrically distributed along the circumferential direction of the cylindrical cavity; the steel ladle supporting frames (500), two ends of the steel ladle supporting frames (500) are respectively connected with the concrete platform (400), and the two steel ladle supporting frames (500) are arranged at intervals in parallel and are used for bearing steel ladles.
  4. 4. A crash pit for a vacuum degassing furnace according to claim 3, characterized in that the top of the side wall module (300) is provided with a bevel (310), the angle between the bevel (310) and the horizontal plane being 45 °.
  5. 5. The emergency pit for a vacuum degassing furnace according to claim 4, wherein the material of the filler block (220) is high-alumina or almag explosion-proof castable.
  6. 6. Emergency event pit for a vacuum degassing furnace according to claim 5, characterized in that the material of the side wall module (300) is a high-aluminium or aluminium-magnesium explosion-proof castable.
  7. 7. A construction method of an emergency pit, characterized in that the emergency pit for a vacuum degassing furnace according to any one of claims 1 to 6, comprises: Assembling a bottom wall module (200) in the pit body (100); the sidewall modules (300) are poured by integral formwork pouring.
  8. 8. The construction method of the emergency event pit according to claim 7, wherein the assembling of the bottom wall module (200) in the pit body (100) includes: and paving precast blocks (210) on the bottom surface of the pit body (100), filling explosion-proof castable into gaps between adjacent precast blocks (210) to form filling blocks (220), and connecting the precast blocks (210) into a whole.
  9. 9. The construction method of the emergency pit according to claim 8, wherein the laying of the prefabricated block (210) on the bottom surface of the pit body (100) comprises: and baking in a workshop to prepare prefabricated blocks (210), lifting the prefabricated blocks (210) to the bottom surface of the pit body (100), paving the prefabricated blocks (210) and reserving gaps between adjacent prefabricated blocks (210).
  10. 10. The method of construction of an emergency event pit according to claim 9, wherein the pouring of the sidewall module (300) by integral formwork pouring comprises: and building a lining template on the bottom wall module (200) along the trend of the side wall of the pit body (100), so that a cavity with consistent space is formed between the lining template and the side surface of the pit body (100), and pouring explosion-proof castable into the cavity.

Description

Emergency accident pit for vacuum degassing furnace and construction method thereof Technical Field The invention relates to the technical field of steelmaking production, in particular to an emergency accident pit for a vacuum degassing furnace and a construction method thereof. Background In the steel smelting process, in order to cope with the sudden accidents, such as steel ladle steel leakage, etc., a spare accident pit is needed to contain the flowing molten steel. The existing accident pit is generally built by adopting refractory bricks, although the building mode is mature in process, the problems in practical application are that flatness among refractory bricks at the bottom is not high, slag removal operation is difficult, the integrity of the refractory brick building is poor, the bonding degree of the refractory bricks and concrete is not high, the peeling condition of the refractory bricks exists in the later slag removal process, the service life of the accident pit can be influenced, and gaps exist between the refractory bricks and a concrete supporting table to influence heat preservation performance. In addition, the accident pit can also be constructed rapidly by adopting an integral casting technology. Due to the lack of special baking equipment capable of providing gradient baking conditions, the baking is performed on site by utilizing the waste heat of the hot ladle cladding just coming off line. The frequent replacement of the hot ladle envelope does not provide effective gradient baking conditions. The hot ladle cladding has lower heat radiation temperature and excessively thick overlapped bottom castable, so that the moisture of the castable is not thoroughly baked, and potential safety hazards are easily caused when the castable is put into use in a later period. Meanwhile, the phenomenon of alternating cold and hot can be generated when the steel cladding is replaced, so that burst defects of the castable are easily caused in the baking process. Disclosure of Invention The present invention aims to solve the technical problems existing in the related art. Therefore, the invention provides an emergency accident pit for a vacuum degassing furnace and a construction method thereof, which are used for solving the defects that the existing emergency accident pit is difficult to remove slag, has short service life and poor heat preservation performance, and is easy to burst castable in the construction process. The invention provides an emergency accident pit for a vacuum degassing furnace, comprising: the pit body is provided with a cylindrical accommodating cavity with an open top; the bottom wall module is laid on the bottom surface of the cylindrical cavity; The side wall module is attached to the inner side surface of the cylindrical cavity and extends upwards from the bottom wall module; The bottom wall module comprises precast blocks and filling blocks, wherein a plurality of precast blocks are tiled on the bottom surface of the cylindrical cavity, gaps are formed between any two adjacent precast blocks, and the filling blocks are embedded in the gaps and are used for connecting the adjacent precast blocks. According to the emergency accident pit for the vacuum degassing furnace, the precast block is provided with the wedge-shaped part extending along the edge of the plate surface of the precast block, and the sharp edge of the wedge-shaped part is arranged between two plate surfaces of the precast block in a centered manner, so that the width of a gap between adjacent precast blocks changes along with the inclined side surface of the wedge-shaped part. The emergency accident pit for the vacuum degassing furnace provided by the invention further comprises: The concrete platforms are connected with the inner side surface of the cylindrical containing cavity and are higher than the side wall modules, and the four concrete platforms are symmetrically distributed along the circumferential direction of the cylindrical containing cavity; the steel ladle supporting frames are respectively connected with the concrete platform at two ends, and the two steel ladle supporting frames are arranged at intervals in parallel and are used for receiving steel ladles. According to the emergency accident pit for the vacuum degassing furnace, the inclined plane is arranged at the top of the side wall module, and the included angle between the inclined plane and the horizontal plane is 45 degrees. According to the emergency accident pit for the vacuum degassing furnace, the filling blocks are made of high-alumina or aluminum-magnesium explosion-proof castable. According to the emergency accident pit for the vacuum degassing furnace, the side wall module is made of high-alumina or aluminum-magnesium explosion-proof castable. In a second aspect, the present invention also provides a construction method of an emergency accident pit, for an emergency accident pit for a vacuum degassing furnace, as set f