Converter tapping hole seating brick
By designing a sloped taphole seat brick, the problem of easy damage and accelerated erosion of the converter taphole seat brick under high-temperature oxidizing atmosphere was solved, achieving safety protection and improved sealing of the taphole area.
Patent Information
- Application Number
- CN202520307131.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-25
AI Technical Summary
The existing converter tapping hole seat bricks are easily damaged under high-temperature oxidizing atmosphere, and molten steel tends to get trapped during tapping, leading to accelerated erosion. The loose structure results in many leakage channels and a low safety factor.
Design a sloped taphole seat brick, including a first brick layer, a second brick layer, and a third brick layer. By adjusting the shape of the last section of the seat brick to match the furnace shape, an inward contraction slope is formed at the outlet, enhancing sealing and protection.
It effectively avoids pitting, reduces erosion at the tapping point, improves furnace lining safety, reduces steel leakage channels, and enhances the safety factor.
Smart Images
Figure CN223793196U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a tapping outlet brick, specifically a converter tapping outlet brick. Background Technology
[0002] The taphole seat brick is a brick that fits over the sleeve brick, serving two main purposes: first, to protect the sleeve brick; and second, to support the converter brick when drilling holes for sleeve brick replacement, facilitating the replacement process. Common seat bricks include pre-formed, fixed products and those directly constructed on-site from bricks.
[0003] During construction, it can be directly installed after being assembled with the sleeve bricks, resulting in fewer steel leakage channels and a high safety factor. The brick-built steel taphole seat bricks are generally constructed inside the converter shell using working layer bricks, while other areas are constructed on-site using permanent layer magnesia bricks, with the surrounding area filled with rammed earth. This structure is relatively loose, with more steel leakage channels, but the cost is relatively lower.
[0004] However, currently, from the moment molten iron is charged into the converter to the blowing process, the tapping spout is in a high-temperature oxidizing atmosphere. The furnace gas produced during the blowing process contains a large amount of CO. When it is discharged from the tapping spout, a CO reaction occurs, forming a decarburized layer on the inner wall surface of the tapping spout, directly causing damage to the tapping spout. This has the following shortcomings:
[0005] 1. The converter tapping port is located at the junction of the furnace body and the furnace cap. Because the furnace cap has a certain degree of inclination, while the external baffle of the tapping port is vertical, the depth of the tapping port seat brick is deeper at the top and shallower at the bottom.
[0006] 2. In the past, the tapping hole seat bricks were made of 4-5 sections of flat vertical seat bricks connected together. Because the furnace lining above the inner seat bricks narrowed, the area of the seat bricks above the tapping hole was concave. When steel was tapped, molten steel was easily trapped, which accelerated erosion and caused the tapping hole area to turn red. Utility Model Content
[0007] The purpose of this utility model is to address the shortcomings and defects in the existing technology by providing a converter tapping hole seat brick. This tapping hole seat brick is designed by changing the shape and size of the last section of the tapping hole seat brick according to the furnace lining construction. It is changed from a flat seat brick to a tapping hole seat brick that matches the furnace shape and has a slope. Using this tapping hole seat brick can effectively avoid the formation of pits, thereby better protecting the furnace lining safety at the tapping hole.
[0008] To achieve the above objectives, the present invention adopts the following technical solution: a converter tapping hole seat brick, which includes a furnace shell 1 and a furnace body 3. The furnace body 3 is disposed in the inner cavity of the furnace shell 1, and a tapping hole seat brick 2 is installed at the tapping hole of the furnace shell 1. The tapping hole seat brick 2 includes a first seat brick layer 21, a second seat brick layer 22, and a third seat brick layer 23. The first seat brick layer 21 is laid on the furnace body 3, and the inner wall of the first seat brick layer 21 is covered with the second seat brick layer 22. The third seat brick layer 23 is laid on the inner side of the second seat brick layer 22. The outlet of the tapping hole seat brick 2 is sloped inward from the bottom.
[0009] Furthermore, the first brick layer 21 is rectangular, and the dimensions of the first brick layer 21 are 410mm x 410mm. The second brick layer 22 and the third brick layer 23 are both circular, and the outer diameter of the second brick layer 22 is 360mm, the inner diameter of the second brick layer 22 is 340mm, and the inner diameter of the third brick layer 23 is 280mm.
[0010] Furthermore, the inner cavity of the third brick layer 23 is provided with a steel tapping cavity I to facilitate the flow of molten iron.
[0011] Furthermore, the slope at the outlet of the steel outlet seat brick 2 has an inclination angle of A, and the angle of A is 70°.
[0012] Furthermore, the end of the first brick layer 21 is longer than the end of the third brick layer 23, and the end of the second brick layer 22 connects the ends of its first brick layer 21 and the third brick layer 23.
[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: This tapping hole seat brick is designed according to the furnace lining construction situation. By changing the shape and size of the last section of the tapping hole seat brick, it is changed from a flat seat brick to a tapping hole seat brick that matches the furnace type and has a slope. Using this tapping hole seat brick can effectively avoid the formation of pits, thereby better protecting the furnace lining safety at the tapping hole. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the structure of this utility model.
[0016] Figure 2 This is a cross-sectional structural diagram of the present invention.
[0017] Figure 3 yes Figure 2 The corresponding right-view structural diagram.
[0018] Figure 4 yes Figure 2 Enlarged structural diagram at point B.
[0019] Explanation of reference numerals in the attached drawings: 1. Furnace shell; 2. Tendering port seat brick; 3. Furnace body; 21. First brick layer; 22. Second brick layer; 23. Third brick layer; 1. Tendering passage cavity. Detailed Implementation
[0020] See Figures 1-3 As shown, the technical solution adopted in this specific embodiment is as follows: it includes a furnace shell 1 and a furnace body 3. The furnace body 3 is located in the inner cavity of the furnace shell 1, and a steel outlet seat brick 2 is installed at the steel outlet of the furnace shell 1. The steel outlet seat brick 2 includes a first seat brick layer 21, a second seat brick layer 22, and a third seat brick layer 23. The first seat brick layer 21 is laid on the furnace body 3, and the inner wall of the first seat brick layer 21 is laid with the second seat brick layer 22. The third seat brick layer 23 is laid on the inner side of the second seat brick layer 22. The outlet of the steel outlet seat brick 2 is sloped inward from the bottom.
[0021] More specifically, the first brick layer 21 is rectangular and has dimensions of 410mm x 410mm. The second brick layer 22 and the third brick layer 23 are both circular. The outer diameter of the second brick layer 22 is 360mm, the inner diameter of the second brick layer 22 is 340mm, and the inner diameter of the third brick layer 23 is 280mm.
[0022] More specifically, the inner cavity of the third brick layer 23 is provided with a steel tapping cavity I to facilitate the flow of molten iron.
[0023] More specifically, the slope at the outlet of the steel outlet seat brick 2 has an inclination angle of A, and the angle of A is 70°.
[0024] See Figure 4 As shown, and more specifically, the end of the first brick layer 21 is longer than the end of the third brick layer 23, and the end of the second brick layer 22 connects the ends of the first brick layer 21 and the third brick layer 23. This ensures the sealing between the tap hole brick 2 and the furnace shell 1.
[0025] The working principle of this utility model is as follows: By installing a tapping hole seat brick 2 at the tapping hole of the furnace shell 1 and the furnace body 3, the tapping hole seat brick 2 is composed of three layers: a first seat brick layer 21, a second seat brick layer 22, and a third seat brick layer 23. The outlet of the tapping hole seat brick 2 has a slope that matches the furnace shape. During operation, the molten iron can flow into the converter through the lower opening, reducing its erosion rate and thus avoiding the formation of pits, effectively protecting the furnace lining at the tapping hole.
[0026] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A converter taphole seat brick, characterized in that: It includes a furnace shell (1) and a furnace body (3). The furnace body (3) is located in the inner cavity of the furnace shell (1), and a steel outlet seat brick (2) is installed at the steel outlet of the furnace shell (1). The steel outlet seat brick (2) includes a first seat brick layer (21), a second seat brick layer (22), and a third seat brick layer (23). The first seat brick layer (21) is laid on the furnace body (3), and the inner wall of the first seat brick layer (21) is covered with the second seat brick layer (22). The third seat brick layer (23) is laid on the inner side of the second seat brick layer (22). The outlet of the steel outlet seat brick (2) is sloped downwards and inwards.
2. The converter tapping spout seat brick according to claim 1, characterized in that: The inner cavity of the third brick layer (23) is provided with a steel tapping cavity (I) to facilitate the flow of molten iron.
3. The converter tapping spout brick according to claim 1, characterized in that: The first brick layer (21) is rectangular and has a size of 410mm x 410mm. The second brick layer (22) and the third brick layer (23) are both circular. The outer diameter of the second brick layer (22) is 360mm, the inner diameter of the second brick layer (22) is 340mm, and the inner diameter of the third brick layer (23) is 280mm.
4. The converter tapping spout brick according to claim 1, characterized in that: The slope at the outlet of the steel outlet seat brick (2) has an inclination angle of A, and the angle of A is 70°.
5. A converter tapping spout seat brick according to claim 1, characterized in that: The end of the first brick layer (21) is longer than the end of the third brick layer (23), and the end of the second brick layer (22) connects the ends of its first brick layer (21) and the third brick layer (23).