Furnace top refractory lining body structure of aluminum reverberatory furnace

Abstract

The utility model discloses an aluminum reverberatory furnace top refractory lining body structure which comprises a working layer, a furnace top refractory lining body is manufactured in a bin division pouring mode, bin division blocks are separated through aluminum silicate fiber paper, trapezoid splicing seams are adopted, mutual extrusion caused by thermal expansion of the refractory lining body can be counteracted, and local damage is avoided. The trapezoid splicing seams are adopted, so that the bin dividing blocks reach a stress balance state, and when flames impact the furnace top refractory lining body, the flames are prevented from penetrating through the splicing seams to impact the heat preservation layer and the metal anchoring parts, and irreversible damage is avoided. When part of the bin blocks peel off and the like, local rapid replacement can be achieved, and high-aluminum anchoring bricks and metal anchoring parts are alternately distributed in a furnace top hanging system. The upper ends of the high-aluminum anchoring bricks are movably connected with the furnace top steel structure, on one hand, the tensile force on the furnace top fireproof lining body is kept, and on the other hand, when the volume of the furnace top fireproof lining body changes due to temperature changes, the metal anchoring bricks cannot be broken due to transverse shearing force.

Description

Technical Field

[0001] The utility model relates to the field of reverberatory furnaces, in particular to a refractory lining structure of an aluminum reverberatory furnace roof. Background Art

[0002] The reverberatory furnace is a commonly used thermal equipment for aluminum casting. During the operation of the reverberatory furnace, the high-speed flame ejected from the regenerative burner directly impacts the piled material in the furnace to melt the aluminum. The high-speed flame is reflected by the aluminum to various parts of the furnace wall and the top of the furnace, causing continuous thermal shock to the refractory lining of various parts. When the aluminum liquid is released and the furnace door is opened again to add material, the burner stops working and the furnace temperature drops.

[0003] The reverberatory furnace repeats this process, which places high demands on the thermal shock resistance, thermal shock stability and volume stability of the furnace roof refractory lining. After long-term use, the furnace roof will be partially damaged or even collapsed. It becomes particularly important to improve the service life of the furnace roof refractory lining and facilitate local maintenance.

[0004] In view of this, research and improvement are conducted on the existing problems, and a refractory lining structure for the roof of an aluminum reverberatory furnace is provided. The structure has a reasonable structural design, and the refractory lining of the roof is made in the form of compartment casting. The compartment blocks are separated by aluminum silicate fiber paper and use trapezoidal joints, which can offset the mutual extrusion caused by thermal expansion of the refractory lining and avoid local damage. The purpose is to solve the problem and improve the practical value through this technology. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a refractory lining structure for the roof of an aluminum reverberatory furnace.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a refractory lining structure of an aluminum reverberatory furnace roof, comprising a working layer and a furnace roof steel structure, an aluminum silicate fiber blanket is arranged at the upper end of the working layer, the upper end of the aluminum silicate fiber blanket is connected to a thermal insulation castable, a pressed clay brick is arranged below the aluminum silicate fiber blanket, a high-aluminum anchor brick is arranged below the furnace roof steel structure, the upper end of the high-aluminum anchor brick is connected to a metal hanger, a trapezoidal splicing seam is formed between each compartment block of the pressed clay brick, a metal anchor A and a metal anchor B are arranged inside the working layer, ceramic fiber paper A is arranged inside the trapezoidal splicing seam, and one end of the working layer is connected to ceramic fiber paper B.

[0007] As a further description of the above technical solution:

[0008] The aluminum silicate fiber blanket is fixedly connected to the top of the working layer, and the thermal insulation castable is cast and installed on the top of the aluminum silicate fiber blanket.

[0009] As a further description of the above technical solution:

[0010] The refractory lining is composed of a high-temperature resistant low-cement castable working layer, an aluminum silicate fiber blanket and a thermal insulation castable from bottom to top. The furnace top refractory lining structure is connected to the reverberatory furnace top steel structure through a hanging system composed of alternating high-aluminum anchor bricks and metal anchors. The number of the pressed seam clay bricks is several.

[0011] As a further description of the above technical solution:

[0012] The upper half of the high-aluminum anchor brick is connected to the furnace roof steel structure, and the bottom is connected to the working layer and the steel structure by pouring in the working layer. The lower end of the high-aluminum anchor brick is flush with the working layer, and the upper end of the high-aluminum anchor brick is connected to the furnace roof steel structure through a metal hanger. The upper end of the metal anchor is welded to the furnace roof steel structure, and the lower end is buried inside the working layer starting from the bifurcated end.

[0013] As a further description of the above technical solution:

[0014] The metal anchors A and B are fixedly installed inside the working layer, and adjacent metal anchors are rotated 180° and arranged alternately. The number of the metal anchors A and B is several.

[0015] As a further description of the above technical solution:

[0016] The trapezoidal joints are in the shape of a trapezoid, clay bricks are pressed on the joints of the compartment blocks, there are several trapezoidal joints, and the ceramic fiber paper A is fixedly connected inside the trapezoidal joints.

[0017] As a further description of the above technical solution:

[0018] The ceramic fiber paper B is fixedly connected to one end of the working layer, and is composed of 3 layers of 3mm ceramic fiber paper.

[0019] The utility model has the following beneficial effects:

[0020] In the utility model:

[0021] 1. The furnace roof refractory lining is made by compartment casting. The compartment blocks are separated by aluminum silicate fiber paper and have trapezoidal joints, which can offset the mutual extrusion caused by the thermal expansion of the refractory lining and avoid local damage. The trapezoidal joints make the force balance between the compartment blocks. When the flame hits the furnace roof refractory lining, it is prevented from passing through the joints to hit the insulation layer and metal anchors, causing irreversible damage. When some compartment blocks peel off, they can be quickly replaced.

[0022] Clay bricks are pressed on the joints of the compartment blocks to reduce the damage to the insulation layer and metal anchors caused by flames passing through the joints.

[0023] The furnace roof hanging system uses high-aluminum anchor bricks and metal anchors that are alternately distributed. The upper end of the high-aluminum anchor brick is movably connected to the furnace roof steel structure. On the one hand, it maintains the tensile force on the furnace roof refractory lining. On the other hand, when the furnace roof refractory lining changes in volume due to temperature changes, the metal anchor brick will not be broken due to lateral shear force.

[0024] The metal anchors are made of 310S material with a diameter of not less than 10mm. The part inserted into the refractory lining of the working layer adopts a bifurcated corrugated structure to increase the tensile effect on the refractory lining of the working layer. Adjacent metal anchors are placed vertically to make the force more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of a refractory lining structure of an aluminum reverberatory furnace top proposed by the utility model;

[0026] Figure 2 It is an enlarged view of the A part of the refractory lining structure of the aluminum reverberatory furnace top proposed by the utility model;

[0027] Figure 3 It is an enlarged view of the B part of the refractory lining structure of the aluminum reverberatory furnace top proposed by the utility model;

[0028] Figure 4 This is an enlarged view of the C portion of the refractory lining structure of the aluminum reverberatory furnace roof proposed by the utility model.

[0029] Legend:

[0030] 1. Working layer; 2. Aluminum silicate fiber blanket; 3. Thermal insulation castable; 4. Furnace roof steel structure; 5. Pressed clay bricks; 6. Metal hanging parts; 7. Trapezoidal joints; 8. High-aluminum anchor bricks; 9. Metal anchor A; 10. Metal anchor B; 11. Ceramic fiber paper A; 13. Ceramic fiber paper B. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model; the terms "first", "second" and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Reference Figure 1-4 The utility model provides an embodiment: a refractory lining structure of an aluminum reverberatory furnace roof, comprising a working layer 1 and a furnace roof steel structure 4, an aluminum silicate fiber blanket 2 is arranged at the upper end of the working layer 1, and the upper end of the aluminum silicate fiber blanket 2 is connected to a thermal insulation castable 3, and a pressed clay brick 5 is arranged below the aluminum silicate fiber blanket 2, and a high-aluminum anchor brick 8 is arranged below the furnace roof steel structure 4, and the upper end of the high-aluminum anchor brick 8 is connected to a metal hanger 6, and a trapezoidal splicing seam 7 is formed between each compartment block of the pressed clay brick 5, a metal anchor A9 and a metal anchor B10 are arranged inside the working layer 1, a ceramic fiber paper A11 is arranged inside the trapezoidal splicing seam 7, and one end of the working layer 1 is connected to a ceramic fiber paper B13.

[0034] In the utility model, the aluminum silicate fiber blanket 2 is fixedly connected to the top of the working layer 1, the thermal insulation castable 3 is cast and installed on the top of the aluminum silicate fiber blanket 2, and clay bricks are pressed on the joints of the compartment blocks to reduce the damage of flames through the joints to the thermal insulation layer and the metal anchors.

[0035] Furthermore, the refractory lining is composed of a high temperature resistant low cement castable working layer 1, an aluminum silicate fiber blanket 2 and a thermal insulation castable 3 from bottom to top, and the furnace top refractory lining structure is connected to the reverberatory furnace top steel structure through a hanging system composed of high aluminum anchor bricks 8 and metal anchors alternately distributed. The number of the pressed seam clay bricks 5 is several, and the furnace top hanging system adopts high aluminum anchor bricks and metal anchors alternately distributed. The upper end of the high aluminum anchor brick is movably connected to the furnace top steel structure.

[0036] Furthermore, the upper half of the high-aluminum anchor brick 8 is connected to the furnace roof steel structure 4, and the bottom is poured with concrete to connect the furnace roof steel structure 4 and the working layer 1. The lower end of the high-aluminum anchor brick 8 is flush with the working layer 1, and the upper end of the high-aluminum anchor brick 8 is connected to the furnace roof steel structure 4 through a metal hanger 7. The upper end of the metal anchor is welded to the furnace roof steel structure 4, and the lower end is buried in the interior of the working layer 1 starting from the bifurcated end.

[0037] Furthermore, the metal anchors A9 and B10 are fixedly installed inside the working layer 1. The number of the metal anchors A9 and B10 is several. The metal anchors are made of 310S material with a diameter of not less than 10 mm. The part inserted into the refractory lining of the working layer adopts a bifurcated corrugated structure to increase the tensile effect on the refractory lining of the working layer. Adjacent metal anchors are placed vertically to make the force more uniform.

[0038] Furthermore, the trapezoidal joint seam 7 is in the shape of a trapezoid, clay bricks are pressed on the joint seams of the compartment blocks, the number of the trapezoidal joint seams 7 is several, the ceramic fiber paper A11 is fixedly connected inside the trapezoidal joint seam 7, and the ceramic fiber paper A11 is composed of 2 layers of 3mm ceramic fiber paper. The trapezoidal joint seam is used to achieve a force balance state between the compartment blocks. When the flame impacts the refractory lining of the furnace top, the flame is prevented from penetrating the joint seam to impact the insulation layer and the metal anchor, causing irreversible damage. When some compartment blocks have problems such as peeling, local rapid replacement can be achieved.

[0039] Furthermore, the ceramic fiber paper B13 is fixedly connected to one end of the working layer 1, and is composed of three layers of 3 mm ceramic fiber paper B13.

[0040] Working principle and usage process: The refractory lining is composed of a high-temperature resistant low-cement castable working layer and an aluminum silicate fiber and lightweight thermal insulation castable insulation layer from bottom to top. The furnace top refractory lining structure is connected to the reverberatory furnace top steel structure through a hanging system composed of alternating high-aluminum anchor bricks and metal anchors. The lower end of the high-aluminum anchor brick is flush with or higher than the working layer, and the upper end of the high-aluminum anchor brick is connected to the furnace top steel structure through a metal hanging piece. The upper end of the metal anchor is welded to the furnace top steel structure, and the lower end is buried in the working layer from the bifurcated end. The high-temperature resistant low-cement castable working layer is made by compartment casting, and clay bricks are pressed on the upper end of the compartment block.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A refractory lining structure for an aluminum reverberatory furnace roof, comprising a working layer (1) and a roof steel structure (4), characterized in that: An aluminum silicate fiber blanket (2) is arranged at the upper end of the working layer (1), and the upper end of the aluminum silicate fiber blanket (2) is connected to a thermal insulation castable (3). A pressed clay brick (5) is arranged below the aluminum silicate fiber blanket (2). A high-aluminum anchor brick (8) is arranged below the furnace roof steel structure (4), and the upper end of the high-aluminum anchor brick (8) is connected to a metal hanger (6). Trapezoidal joints (7) are formed between the compartment blocks of the working layer (1). Metal anchors A (9) and metal anchors B (10) are arranged inside the working layer (1), and ceramic fiber paper A (11) is arranged inside the trapezoidal joint (7). One end of the working layer (1) is connected to ceramic fiber paper B (13).

2. The refractory lining structure of an aluminum reverberatory furnace roof according to claim 1, characterized in that: The aluminum silicate fiber blanket (2) is fixedly connected to the top of the working layer (1), and the thermal insulation castable (3) is cast and installed on the top of the aluminum silicate fiber blanket (2).

3. The refractory lining structure of an aluminum reverberatory furnace roof according to claim 1, characterized in that: The refractory lining is composed from bottom to top of a working layer (1) of a high temperature resistant low cement castable, an aluminum silicate fiber blanket (2) and a thermal insulation castable (3). The furnace top refractory lining structure is connected to the reverberatory furnace top steel structure through a hanging system composed of high aluminum anchor bricks (8) and metal anchors that are alternately distributed. The number of the pressed seam clay bricks (5) is several.

4. The refractory lining structure of an aluminum reverberatory furnace roof according to claim 1, characterized in that: The upper half of the high-aluminum anchor brick (8) is connected to the furnace roof steel structure (4), and the bottom is poured into the working layer to connect the working layer (1) and the steel structure (4). The lower end of the high-aluminum anchor brick (8) is flush with the working layer (1), and the upper end of the high-aluminum anchor brick (8) is connected to the furnace roof steel structure (4) through a metal hanging piece (6). The upper end of the metal anchor is welded to the furnace roof steel structure (4), and the lower end is buried inside the working layer (1) starting from the bifurcated end.

5. The refractory lining structure of an aluminum reverberatory furnace roof according to claim 1, characterized in that: The metal anchors A (9) and metal anchors B (10) are fixedly installed inside the working layer (1), and adjacent metal anchors are rotated 180 degrees and arranged alternately. The number of the metal anchors A (9) and metal anchors B (10) is multiple.

6. The refractory lining structure of an aluminum reverberatory furnace roof according to claim 1, characterized in that: The trapezoidal joint seams (7) are in the shape of a trapezoid, clay bricks are pressed on the joint seams of the compartment blocks, there are a plurality of trapezoidal joint seams (7), and the ceramic fiber paper A (11) is fixedly connected inside the trapezoidal joint seams (7).

7. The refractory lining structure of an aluminum reverberatory furnace roof according to claim 1, characterized in that: The ceramic fiber paper B (13) is fixedly connected to one end of the working layer (1), and the ceramic fiber paper B (13) is composed of three layers of 3 mm ceramic fiber paper.

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