A layered brick supporting structure for RH refining furnace

Abstract

The utility model belongs to the technical field of refractory material of steel metallurgical equipment, disclose a kind of layered formula supporting brick structure for RH refining furnace, including supporting brick board structure unit, multiple structural identical supporting brick board structure unit with furnace body center as center interval evenly fixed on furnace body steel shell inner wall, jointly form annular supporting plate structure, annular supporting plate structure is set as multilayer along furnace body steel shell height direction, for the lower tank of refining furnace is divided into multiple independent masonry section, supporting brick board is placed with its compatible masonry supporting brick, the utility model is divided into multiple independent support area section by the design of modularization, can realize accurate maintenance according to actual erosion, maximum limit utilize the life of refractory material of each section, significantly reduce the consumption of refractory material, also reduce the industrial waste generated due to frequent replacement.

Description

Technical Field

[0001] This utility model relates to the field of refractory materials for iron and steel metallurgical equipment, specifically to a layered support brick structure for an RH refining furnace. Background Technology

[0002] The RH refining furnace is a key secondary refining equipment for producing high-quality steel. Its metallurgical reaction takes place in a vacuum tank lined with refractory materials. The lower part of the vacuum tank is in direct contact with the molten steel, resulting in severe erosion of the refractory material, with the degree of erosion decreasing gradually from bottom to top.

[0003] A utility model patent with patent number CN206768167U describes a masonry structure for the lower trough of an RH refining furnace. It involves installing a brick support plate at the bottom of the lower trough, dividing the masonry into upper and lower sections. By inverting the brick support plate, the upper permanent layer and insulation layer are retained when replacing the lower working layer, reducing waste. However, this prior art still has the following shortcomings: 1. It is a single layer (only two layers, top and bottom), which cannot adapt to the finer erosion gradient of the lower groove, and the refractory bricks in the middle that still have a remaining life may still be replaced prematurely. 2. Its brick support plate is usually an integral ring structure, which is inconvenient to manufacture and install, and has high internal pressure when heated and expanded; 3. The lack of effective stress buffering design between the brick support plate and the supporting structure below makes it prone to deformation and damage under long-term high temperature and heavy load.

[0004] Therefore, there is an urgent need in this field for a brick support structure that can achieve multi-level fine partitioning, has structural stability, and has good resistance to thermal stress. Utility Model Content

[0005] To solve the above-mentioned technical problems, the utility model provides a modular, multi-level, and stable buffer support layered brick support structure for RH refining furnaces. Through modular design, the lower trough is divided into multiple independent support sections, thereby realizing independent replacement of refractory materials in different areas and maximizing their service life.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution: a layered brick support structure for an RH refining furnace, comprising brick support plate structural units, wherein multiple identical brick support plate structural units are uniformly fixedly arranged on the inner wall of the furnace body steel shell with the furnace body center as the center, forming an annular support plate structure. The annular support plate structure is arranged in multiple layers along the height direction of the furnace body steel shell, which is used to divide the lower groove of the refining furnace into multiple independent masonry sections. Matching brick support is placed on the brick support plate.

[0007] Specifically, three vertical ribs are evenly spaced and fixedly installed below the brick support plate structural unit to support and reinforce the brick support plate structural unit.

[0008] Specifically, the supporting bricks include hot-face bricks, backing bricks, insulation bricks, and fiberboards laid sequentially from the inside out, and the hot-face bricks are provided with grooves that cooperate with the supporting brick plate structural units.

[0009] Specifically, a fiber felt is provided between the supporting brick and the supporting brick plate structural unit to buffer and absorb the pressure generated by the thermal expansion of the refractory brick.

[0010] Specifically, the structural unit of the brick support plate is a fan-shaped plate or an arc-shaped plate, and its curvature is adapted to the curvature of the inner wall of the furnace body steel shell.

[0011] Specifically, the vertical rib is a steel plate, the lower end of which is welded and fixed to the steel shell of the furnace body, and the side is welded and fixed to the bottom surface of the brick support plate structural unit.

[0012] Specifically, the annular tray structure is configured with two or three layers.

[0013] The beneficial effects of this utility model are as follows: 1. Multi-level fine zoning, high refractory material utilization: By setting a multi-layer annular support plate structure along the height direction, the lower trough can be divided into three or more independent masonry sections. This enables "precise maintenance" based on the actual erosion situation, maximizes the utilization of the refractory material life of each section, solves the problem of insufficient precision in existing technologies that only divide into two zones, and significantly reduces refractory material consumption;

[0014] 2. Modular design for easy manufacturing and installation: Multiple independent "brick support plate structural units" are combined into a ring structure. Compared to a single ring plate, this design requires lower manufacturing precision and is more convenient for transportation and installation. In case of localized damage, the damaged unit can be replaced individually, resulting in low maintenance costs.

[0015] 3. Stable and reliable structure: Each brick support unit is supported by three vertical ribs, forming a stable triangular support system with strong load-bearing capacity. This effectively prevents the brick support from deforming or collapsing under heavy loads and high temperatures, thus enhancing the overall stability of the masonry.

[0016] 4. Good stress buffering and sealing performance: Fiber felt is set between the brick support plate and the brick support. The fiber felt plays a key buffering role, which can absorb the stress generated by the thermal expansion of the refractory bricks and avoid damage to the metal support structure. At the same time, it fills the micro-unevenness of the contact surface, which can achieve good sealing and auxiliary heat insulation effect.

[0017] 5. Economic and environmental protection: While extending the service life of refractory materials and reducing waste, it also reduces industrial waste generated by frequent replacements, which meets the requirements of green manufacturing. Attached Figure Description

[0018] Figure 1This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the brick support plate structure unit of this utility model; Figure 3 This is a schematic diagram of the welding of the brick support plate structural unit and the vertical reinforcement of this utility model. Figure 4 This is a schematic diagram of the annular support plate structure of this utility model; Figure 5 for Figure 1 A magnified view of a portion of the schematic diagram of the three-dimensional structure; The markings in the diagram are: 1. Support plate; 2. Furnace body steel shell; 3. Annular support plate structure; 4. Vertical rib; 5. Support brick; 51. Hot face brick; 52. Backing brick; 53. Insulating brick; 54. Fiberboard; 6. Fiber felt. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 As shown, a layered brick support structure for an RH refining furnace includes a brick support plate structure unit 1. Multiple identical brick support plate structure units 1 are evenly and fixedly arranged on the inner wall of the furnace body steel shell 2 with the furnace body center as the center, forming an annular support plate structure 3. The annular support plate structure 3 is set in multiple layers along the height direction of the furnace body steel shell 2 to divide the lower groove of the refining furnace into multiple independent masonry sections. Matching brick support 5 is placed on the brick support plate 1.

[0021] like Figure 3 As shown, three vertical ribs 4 are evenly spaced and fixedly installed below the brick support plate structural unit 1 to support and reinforce the brick support plate structural unit 1. Preferably, the supporting brick 5 includes a hot-face brick 51, a backing brick 52, an insulating brick 53, and a fiberboard 54 laid sequentially from the inside out. The hot-face brick 51 is provided with a groove that cooperates with the supporting brick plate structural unit 1.

[0022] Preferably, a fiber felt 6 is provided between the supporting brick 5 and the supporting brick plate structural unit 1 to buffer and absorb the pressure generated by the thermal expansion of the refractory brick.

[0023] like Figure 2 As shown, the structural unit 1 of the brick support plate is a fan-shaped plate or an arc plate, the curvature of which is adapted to the curvature of the inner wall of the furnace steel shell 2.

[0024] Preferably, the vertical rib 4 is a steel plate, the lower end of which is welded and fixed to the furnace body steel shell 2, and the side is welded and fixed to the bottom surface of the brick support plate structural unit 1.

[0025] Preferably, the annular tray structure 3 is configured with two or three layers.

[0026] like Figure 4 As shown, during installation, eight identical brick support plate structural units 1 are first welded and fixed around the inner wall of the furnace steel shell 2 at even intervals to form a complete annular support plate structure 3.

[0027] Then, fiber felt 6 is laid on the upper surface of each brick support structural unit 1, and then support bricks 5 are laid on top of the fiber felt 6. The bricks 5, as key components connecting the upper and lower layers, will be used to support the permanent and working masonry layers above them.

[0028] Depending on the operating conditions, two or three layers of annular support plate structures 3 can be welded along the height of the furnace shell 2 in the lower trough of the RH refining furnace, thereby dividing the lower trough into three independent masonry sections: upper, middle, and lower. When the lowermost section erodes and needs to be replaced, only that part needs to be removed, while the masonry of the middle and upper sections remains intact due to the independent support brick structures.

Claims

1. A layered support brick structure for an RH refining furnace, characterized in that: The furnace includes a brick support plate structure unit (1), in which multiple identical brick support plate structure units (1) are evenly fixed on the inner wall of the furnace body steel shell (2) with the furnace body center as the center, forming a ring support plate structure (3). The ring support plate structure (3) is set in multiple layers along the height direction of the furnace body steel shell (2) to divide the lower trough of the refining furnace into multiple independent masonry sections. The brick support plate structure unit (1) is equipped with matching brick support (5).

2. The layered support brick structure for an RH refining furnace according to claim 1, characterized in that: Three vertical ribs (4) are evenly spaced and fixedly installed below the brick support plate structural unit (1) to support and reinforce the brick support plate structural unit (1).

3. The layered brick support structure for an RH refining furnace according to claim 1, characterized in that: The supporting brick (5) includes a hot-face brick (51), a backing brick (52), an insulation brick (53), and a fiberboard (54) laid out sequentially from the inside to the outside. The hot-face brick (51) is provided with a groove that matches the supporting brick board structural unit (1).

4. The layered support brick structure for an RH refining furnace according to claim 3, characterized in that: A fiber felt (6) is provided between the hot-face brick (51) and the brick support plate structural unit (1) to buffer and absorb the pressure generated by the thermal expansion of the refractory brick.

5. The layered support brick structure for an RH refining furnace according to claim 1, characterized in that: The structural unit (1) of the brick support plate is a fan-shaped plate or an arc plate, and its curvature is adapted to the curvature of the inner wall of the furnace steel shell (2).

6. The layered brick support structure for an RH refining furnace according to claim 2, characterized in that: The vertical rib (4) is a steel plate, the lower end of which is welded and fixed to the furnace body steel shell (2), and its side is welded and fixed to the bottom surface of the brick support plate structural unit (1).

7. The layered brick support structure for an RH refining furnace according to claim 1, characterized in that: The annular tray structure (3) is configured with two or three layers.

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