Novel supporting structure based on 300t converter high-efficiency durable furnace lining brick

Abstract

The utility model belongs to the technical field of converter supporting structure equipment, and relates to a novel supporting structure based on a 300t converter high-efficiency durable furnace lining brick, which comprises a converter body, a converter mouth is arranged at the top of the converter body, a flange is arranged on the outer side of the converter mouth, a supporting frame is arranged in the converter body, and a leveler is arranged between the supporting frame and the bottom wall of the converter body. The bottom of the supporting frame is a bottom plate, and the outer wall of the supporting frame is provided with an arc-shaped supporting plate through a connecting supporting rod. According to the utility model, the construction is convenient, the steel structure is simple to manufacture, the overall structure is firm, the overall stability of the furnace lining bricks can be protected, the furnace shaking does not collapse, the dismounting is convenient after the furnace body is shaken right, the furnace shaking operation is carried out under the condition that the furnace is not dried, the integrity of the furnace lining bricks is ensured, the furnace lining bricks do not collapse, the dismounting and the secondary building of the furnace lining are avoided, and the manpower and the time are greatly saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to converter support structure equipment technical field, concretely relates to a kind of novel support structure based on 300t converter high-efficiency durable furnace lining brick. BACKGROUND

[0002] Converter is the core equipment of steel smelting, and the lining brick laying quality is directly related to the service life of converter and production safety. After the traditional converter lining brick construction is completed, the binder in the refractory material needs to be solidified through the oven operation to form sufficient structural strength to fix the lining brick. In actual production process, sudden equipment failure, process adjustment or production plan change and other situations occur occasionally, which leads to the oven operation after the lining brick laying of converter is completed cannot be carried out according to the plan, but the shaking operation is urgently needed.

[0003] The lining brick that is not completely solidified lacks effective fixing structure between the lining brick and the furnace shell, and when the converter body is subjected to the shaking operation, the lining brick is prone to overall slippage or even collapse under the combined action of gravity and centrifugal force. In the prior art, in order to avoid such accidents, the lining brick that has been laid is removed, and the laying operation is reorganized after the shaking operation is completed. This process not only causes serious waste of refractory material, but also requires a large amount of manpower for repeated disassembly and assembly, which increases the production cost and seriously affects the production rhythm.

[0004] Although temporary support frames are used in the prior art, the support members are prone to deformation and failure under high temperature and vibration conditions, and cannot bear the dynamic load generated by the shaking operation. The difference in thermal expansion coefficient between the support structure and the furnace shell and the refractory material easily leads to cracking at the connecting part. The traditional rigid support cannot adapt to the curved surface characteristics of the inner wall of the furnace shell, and there is a risk of local stress concentration. Therefore, it is urgent to develop a new type of support structure specially used for the lining brick of converter. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of novel support structure based on 300t converter high-efficiency durable furnace lining brick, with lining brick support function, to solve the problems in the above background technology.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme that the utility model provides a kind of novel support structure based on 300t converter high-efficiency durable furnace lining brick, including furnace body, the top of furnace body is set as furnace mouth, the outer side of furnace mouth is provided with flange, the inside of furnace body is provided with support frame, and the bottom wall between support frame and furnace body is provided with pad flat material, the bottom of support frame is set as bottom plate, the top of support frame is provided with connecting cover plate, and the outer wall of support frame is provided with arc-shaped support plate through connecting support rod.

[0007] As preferred, the connecting cover plate top is provided with wedge between the furnace mouth, and the side wall of connecting cover plate is provided with silica gel layer.

[0008] Preferably, the matting material is magnesium carbon ramming material, which comprises magnesium oxide and graphite.

[0009] Preferably, the arc-shaped support plate is a rolled steel plate, which is made of 15CrMo heat-resistant alloy steel, has a thickness of 30-50 mm, and has an aluminized surface treatment to form an oxidation-resistant layer with a thickness of 50-80 microns.

[0010] Preferably, the wedge plate is a trapezoidal-section Cr23Ni13 heat-resistant steel component, has an inclined surface with an inclination angle of 5-8°, and has a thermal expansion gap of 0.5-1 mm reserved with the connecting cover plate.

[0011] Preferably, the support frame is internally provided with cross-shaped reinforcing ribs.

[0012] Preferably, the bottom plate is welded with anchor nails arranged in a matrix on the lower surface, and the anchor nails are embedded in the matting material.

[0013] Compared with the prior art, the utility model has the advantages and positive effects that,

[0014] The utility model has the advantages of convenient construction, simple steel structure manufacturing, firm overall structure, protection of the overall stability of the furnace lining bricks, no collapse of the furnace during rocking, convenient removal after the furnace is rocked, rocking operation under the condition that the furnace is not heated, ensuring the integrity of the furnace lining bricks, no collapse, avoiding removal and secondary construction of the furnace lining, and greatly saving manpower and time. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the utility model, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0016] Fig. 1 It is a structure diagram of a new type of support structure based on a 300t converter high-efficiency durable furnace lining brick.

[0017] Fig. 2 It is a partial structure diagram of a new type of support structure based on a 300t converter high-efficiency durable furnace lining brick.

[0018] In the above drawings, 1 is a support frame, 2 is a matting material, 3 is a bottom plate, 4 is a connecting cover plate, 5 is an arc-shaped support plate, 6 is a furnace mouth, 7 is a flange, 401 is a wedge plate, and 402 is a silica gel layer. DETAILED DESCRIPTION

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1, as Figs. 1-2 As shown, a novel support structure based on the high-efficiency and durable furnace lining bricks of a 300t converter includes a furnace body. The top of the furnace body is configured as a furnace opening 6, and a flange 7 is provided on the outside of the furnace opening 6, facilitating connection of the furnace opening to external equipment. Inside the furnace body, a support frame 1 is installed. The support frame 1 serves as the core load-bearing skeleton, transferring the load of the furnace lining bricks to the furnace bottom. The frame structure disperses the dynamic load, resists the centrifugal force generated by furnace shaking, and provides an installation reference for the arc-shaped support plate 5, ensuring precise fit with the inner wall of the furnace body.

[0022] A leveling material 2 is placed between the support frame 1 and the furnace bottom wall to fill the gap between the support frame 1 and the furnace bottom, achieving uniform stress distribution. The bottom of the support frame 1 is set as a base plate 3, which serves as the mounting base for the support frame 1 and bears the vertical compressive stress. A connecting cover plate 4 is provided at the top of the support frame 1 to seal the top of the support frame 1 and prevent material from falling onto the furnace lining bricks. An arc-shaped support plate 5 is provided on the outer wall of the support frame 1 via connecting struts. The arc-shaped support plate 5 directly contacts the furnace lining bricks, providing radial support force.

[0023] The specific design of the aforementioned key components will be discussed in detail below:

[0024] A wedge plate 401 is provided between the top of the connecting cover plate 4 and the furnace opening 6. The wedge plate 401 is used to seal the gap between the top of the connecting cover plate 4 and the furnace opening 6. A silicone layer 402 is provided on the side wall of the connecting cover plate 4. The silicone layer 402 fills the gap between the side wall of the connecting cover plate 4 and the furnace opening 6 to avoid damage from hard contact.

[0025] The leveling material 2 is a magnesium-carbon compactor, which includes magnesium oxide and graphite. The magnesium oxide is ≥78wt% and is made of 97% pure fused magnesia. The graphite is 12-15wt% and is made of flake graphite with ≥95% fixed carbon. The binder is phenolic resin, and the amount of phenolic resin added is 6-8%.

[0026] The arc-shaped support plate 5 is a rolled steel plate, which is made of 15CrMo heat-resistant alloy steel, has a thickness of 30-50 mm, and has an aluminized surface treatment to form an oxidation-resistant layer with a thickness of 50-80 μm. The arc-shaped support plate 5 is tightly attached to the inner wall of the furnace body, and the curvature radius matches the tolerance of the inner wall of the furnace body, with a tolerance of ≤2 mm. A three-roll asymmetric plate rolling machine is used, and the curvature radius of the pre-bent end part matches the curvature radius of the furnace body. After cold forming, stress relief annealing is performed at 600 ℃ for 2 h. The aluminizing process is performed at 930 ℃ for 8 h to form a FeAl3 phase aluminized layer with a thickness of 50-80 μm. The weight gain of the 800 ℃ oxidation test is ≤1.2 mg / cm2 after 100 h. 2 .

[0027] The wedge plate 401 is a Cr23Ni13 heat-resistant steel component with a trapezoidal cross section, and the inclined surface has an inclination angle of 5-8°. A 0.5-1 mm thermal expansion gap is reserved between the wedge plate 401 and the connecting cover plate 4.

[0028] The support frame 1 is internally provided with cross-shaped reinforcing ribs. The rib plate thickness of the cross-shaped reinforcing ribs is equal to 1.5 times the thickness of the frame wall, and the rib height is equal to 2 / 3 of the height of the frame. The cross-shaped angle is 86°, so that the overall rigidity of the frame is improved by 40%.

[0029] The bottom plate 3 is welded with matrix-arranged anchor nails on the lower surface. The anchor nails are arranged in a plum blossom shape, and the horizontal and vertical spacing is 180 mm and 160 mm, respectively. The nail length is 100 mm, and the nail head diameter is Φ25 mm. The anchor nail is embedded in the cushioning material 2, and the anchor nail foot is made of Φ12 mm round steel and is processed into a conical shape with a taper angle of 60° at the end.

[0030] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings. The specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art. The mechanical parts and equipment adopt conventional types in the prior art. The circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail. The contents not described in detail in the description belong to the prior art known by the professional technical personnel.

[0031] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any skilled person in the art can modify or change the above disclosed technical content to apply to other fields as equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made on the basis of the technical essence of the utility model to the above embodiments still belongs to the protection scope of the technical scheme of the utility model.

Claims

1. A novel support structure based on high-efficiency and durable furnace lining bricks for a 300t converter, comprising a furnace body, with the top of the furnace body serving as the furnace opening, and a flange provided on the outer side of the furnace opening, characterized in that... The furnace body is equipped with a support frame inside, and a leveling material is placed between the support frame and the bottom wall of the furnace body. The bottom of the support frame is set as a base plate, and the top of the support frame is set with a connecting cover plate. A wedge plate is placed between the top of the connecting cover plate and the furnace opening. A silicone layer is placed on the side wall of the connecting cover plate, and an arc-shaped support plate is set on the outer wall of the support frame through a connecting rod.

2. The novel support structure based on high-efficiency and durable furnace lining bricks of a 300t converter as described in claim 1, characterized in that, The leveling material is magnesium-carbon compacted material.

3. The novel support structure based on high-efficiency and durable furnace lining bricks of a 300t converter as described in claim 1, characterized in that, The arc-shaped support plate is a rolled steel plate made of 15CrMo heat-resistant alloy steel with a thickness of 30-50mm. The surface is treated with aluminizing to form a 50-80μm anti-oxidation layer. The arc-shaped support plate is closely attached to the inner wall of the furnace, and the radius of curvature matches the inner wall of the furnace with a tolerance of ≤2mm.

4. The novel support structure based on high-efficiency and durable furnace lining bricks of a 300t converter as described in claim 1, characterized in that, The wedge plate is a Cr23Ni13 heat-resistant steel component with a trapezoidal cross-section, an inclination angle of 5-8°, and a thermal expansion gap of 0.5-1mm is reserved between it and the connecting cover plate.

5. The novel support structure based on high-efficiency and durable furnace lining bricks of a 300t converter according to claim 1, characterized in that, The support frame has cross-shaped reinforcing ribs inside.

6. The novel support structure based on high-efficiency and durable furnace lining bricks of a 300t converter according to claim 1, characterized in that, The bottom surface of the base plate is welded with anchor bolts arranged in a matrix, and the anchor bolts are embedded in the leveling material.

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