Zirconia corundum fused composite insulation brick structure

Abstract

The invention relates to a zirconium corundum fused composite thermal insulation brick structure. The technical scheme is as follows: the structure comprises a thermal insulation brick body, a thermal insulation material filling groove which is concave downwards is opened at the top center of the thermal insulation brick body, the thermal insulation material filling groove is filled with a thermal insulation material body, the thermal insulation material filling groove is in the shape of a quadrangular pyramid, the bottom surface of the quadrangular pyramid with a larger area is located at the bottom of the thermal insulation material filling groove, and the top surface of the quadrangular pyramid with a smaller area is located at the mouth of the thermal insulation material filling groove, the thermal insulation material body is in the shape of a quadrangular pyramid which matches the thermal insulation material filling groove, the invention effectively prevents the thermal insulation material body from falling off from the mouth after drying or under low temperature conditions, thereby avoiding the cost waste caused by filling the thermal insulation material again, one-time forming, no secondary filling is required, and only simple surface flatness repair is required, the brick has good integrity, and also saves the labor cost of the secondary filling, thereby greatly improving the overall work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of zirconium corundum fused bricks, in particular to a zirconium corundum fused composite thermal insulation brick structure. Background Art

[0002] The production of zirconium corundum fused bricks is through the mixing materials: zircon sand, aluminum oxide powder and a small amount of soda ash, added into the electric arc furnace, melted at a high temperature of about 2000℃, cast into the sand mold cavity, and then annealed in insulation.

[0003] There is a production method of glass furnace side wall zirconium corundum composite insulation bricks. First, a box-shaped uncovered electric fused brick is produced. After fine processing, the inner cavity of the box-shaped uncovered electric fused brick is filled with mixed adhesive and high temperature resistant insulation material. After the top surface is leveled and solidified, the finished side wall zirconium corundum composite insulation brick is obtained. Figure 1-3 As shown, a filling groove 2a for filling high temperature resistant heat insulation material 2 is opened in the center of the top surface of the box-type coverless electric fusion brick 1. The defects are: first, the side walls of the filling groove 2a inside the box-type coverless electric fusion brick 1 are arranged vertically up and down, and the heat insulation material filled inside will fall off after drying or at low temperature, making the brick scrapped; second, the heat insulation material filled with mixed adhesive has a large secondary cost; third, after the casting box-type coverless electric fusion brick is annealed, the inner core needs to be taken out first, and then the heat insulation material is filled. The steps are cumbersome and occupy a certain amount of labor waste. The cost of filling material ranges from about 5,000 yuan to 7,000 yuan per ton. Each brick can be filled with about 30 kilograms of material, which is about 180 yuan. There are about 100 composite insulation bricks in a kiln. The total cost can reach 18,000 yuan roughly calculated; it takes 2 people and 5 days to manually fill 100 composite insulation bricks with heat insulation materials. Therefore, it is urgent to improve the structure of composite insulation bricks for the side walls of glass kilns to reduce waste. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a zirconium-corundum electric-fused composite insulation brick structure, which can effectively solve the problems of one-time forming of zirconium-corundum composite insulation bricks for the side walls of glass kiln, improve brick forming rate and reduce costs.

[0005] The technical solution provided by the present invention is:

[0006] A zirconium corundum fused composite thermal insulation brick structure comprises a thermal insulation brick body, a downwardly concave thermal insulation material filling groove is opened at the top center of the thermal insulation brick body, the thermal insulation material filling groove is filled with a thermal insulation material body, the thermal insulation material filling groove is in the shape of a quadrangular pyramid, and the bottom surface of the quadrangular pyramid with a larger area is located at the bottom of the thermal insulation material filling groove, and the top surface of the quadrangular pyramid with a smaller area is located at the mouth of the thermal insulation material filling groove, the thermal insulation material body is in the shape of a quadrangular pyramid matching the thermal insulation material filling groove, the bottom surface of the thermal insulation material body is bonded to the bottom surface of the thermal insulation material filling groove, and the side walls around the thermal insulation material body are bonded to the inner walls around the thermal insulation material filling groove.

[0007] The thermal insulation brick body is obtained by casting a zirconium corundum fused composite thermal insulation brick casting mold; the zirconium corundum fused composite thermal insulation brick casting mold includes an outer frame and an inner core placed at the bottom center of the inner cavity of the outer frame, the outer frame is a rectangular container-shaped hollow structure with an upper opening, the inner core is a tetrahedron formed by a thermal insulation material body, the top surface of the tetrahedron with a smaller area is located at the bottom center of the inner cavity of the outer frame, the bottom surface of the tetrahedron with a larger area is located on the side of the upper opening of the inner cavity of the outer frame, and the bottom surface of the tetrahedron with a larger area is lower than the upper end edge of the outer frame, and the space between the outer frame and the thermal insulation material body constitutes the molding space of the thermal insulation brick body.

[0008] The thermal insulation material body 4 is made of a composite thermal insulation brick core material;

[0009] The core material of the composite insulation brick comprises the following raw materials in percentage by mass: 90% of old sand, 5% of high-alumina cement, 5% of alkaline water glass, and a water glass curing agent in an amount of 20% by mass of the alkaline water glass.

[0010] The specific preparation method is:

[0011] (1) Mix the old sand and high-alumina cement and stir for 3 minutes;

[0012] (2) Add water glass curing agent and stir for 2 minutes;

[0013] (3) adding alkaline water glass and stirring for 2 minutes to obtain a finished mixture;

[0014] (4) Filling the finished mixture into a quadrangular pyramid mold and compacting it to form a sand mold;

[0015] (5) After 20 to 30 minutes, under the action of the curing agent, the sand mold in the tetrahedral pyramid mold forms a certain strength, and the mold is removed to obtain a tetrahedral pyramid-shaped thermal insulation material body.

[0016] The structure of the present invention is novel and unique, simple and reasonable. A quadrangular pyramid-shaped insulation material filling groove is set at the center of the top surface of the insulation brick body, and is fitted with the insulation material body filled therein, so that the contact surface between the insulation material body and the insulation brick body forms an inclined surface inclined upward and inward, forming an oblique lifting force, especially when the electric fused brick is demolded during casting (the casting is inverted casting, and demolding requires flipping), it effectively prevents the insulation material body from falling off from the mouth after drying or at a low temperature, thereby avoiding the cost waste caused by filling the insulation material again, and the traditional two steps of first casting the insulation brick body and then filling the insulation material are changed into a one-time molding, without the need for secondary filling, and only a simple repair of the surface flatness is required. The brick has good integrity, and at the same time, the labor cost of the secondary filling is saved, which greatly improves the overall work efficiency. It is an innovation in the structure of zirconium corundum electric fused composite insulation bricks, and has good social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the cross-sectional front view of the zirconium-corundum composite insulation bricks for the side walls of a traditional glass kiln.

[0018] Figure 2 This is a cross-sectional side view of the zirconium-corundum composite insulation bricks on the side wall of a traditional glass kiln.

[0019] Figure 3 This is a top view of the zirconium-corundum composite insulation bricks on the side walls of a traditional glass kiln.

[0020] Figure 4 It is a cross-sectional front view of the structure of the zirconium corundum fused composite thermal insulation brick of the present invention.

[0021] Figure 5 It is a cross-sectional side view of the zirconium corundum fused composite thermal insulation brick structure of the present invention.

[0022] Figure 6 It is a top view of the zirconium corundum fused composite insulation brick structure of the present invention.

[0023] Figure 7 It is a cross-sectional view of the thermal insulation brick body of the present invention (not filled with thermal insulation material).

[0024] Figure 8 It is a three-dimensional diagram of the thermal insulation material body of the present invention.

[0025] Fig. 9 It is a sectional front view of the casting mold of the zirconium corundum electric fused composite thermal insulation brick of the present invention.

[0026] Fig.10 It is a cross-sectional side view of the casting mold of the zirconium corundum fused composite thermal insulation brick of the present invention.

[0027] Fig.11 It is a top view of the casting mold of the zirconium corundum electric fused composite insulation brick of the present invention. DETAILED DESCRIPTION

[0028] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0029] Depend on Figure 1-11 The present invention includes an insulation brick body 3, a downwardly concave insulation material filling groove 31 is opened at the center of the top of the insulation brick body, and the insulation material filling groove 31 is filled with an insulation material body 4, the insulation material filling groove 31 is in the shape of a quadrangular pyramid, and the bottom surface of the quadrangular pyramid with a larger area is located at the bottom of the insulation material filling groove, and the top surface of the quadrangular pyramid with a smaller area is located at the mouth of the insulation material filling groove, the insulation material body 4 is in the shape of a quadrangular pyramid matching the insulation material filling groove, the bottom surface of the insulation material body 4 is bonded to the bottom surface of the insulation material filling groove 31, and at the same time, the side walls around the insulation material body 4 are bonded to the inner walls 31a around the insulation material filling groove 31.

[0030] To ensure the use effect, the side wall thickness around the insulation brick body 3 where the insulation material filling groove 31 is located is greater than 50mm, and the side wall thickness at the bottom of the insulation brick body 3 where the insulation material filling groove 31 is located is also greater than 50mm.

[0031] The angle between the inclined surface 4a of the side wall of the heat-insulating material body 4 and the corresponding vertical surface is 10-30°. Preferably, it is 15° or 25°. Figure 4 , 5 As shown in ∠β, the contact surface between the insulation material body and the insulation brick body forms an upward and inward inclined surface, forming an oblique lifting force, especially when the electric fused brick is demoulded for casting, the casting is inverted and the demoulding needs to be turned over, which effectively prevents the insulation material body from falling off from the mouth after drying or at low temperature, thereby avoiding the cost waste caused by refilling the insulation material.

[0032] The insulation brick body 3 is a fused zirconium corundum brick with a rectangular outer contour. The insulation material filling groove 31 is opened at the center of the upper surface of the rectangular parallelepiped, and the top surface of the insulation material body 4 is flush with the upper surface of the insulation brick body 3.

[0033] The outer contour of the insulation brick body 3 is 400-500 mm in length, 300-400 mm in width and 250-350 mm in height.

[0034] The thermal insulation brick body 3 is obtained by casting in a zirconium corundum fused composite thermal insulation brick casting mold.

[0035] The zirconium corundum fused composite insulation brick casting mold includes an outer frame 5 and an inner core placed at the bottom center of the outer frame inner cavity. The outer frame 5 is a rectangular container-shaped hollow structure with an upper opening. The inner core is a tetrahedron formed by an insulation material body 4. The top surface of the tetrahedron with a smaller area is located at the bottom center of the outer frame inner cavity, and the bottom surface of the tetrahedron with a larger area is located on the side of the upper opening of the outer frame inner cavity, and the bottom surface of the tetrahedron with a larger area is lower than the upper end edge of the outer frame. The space between the outer frame 5 and the insulation material body 4 constitutes a molding space 6 of the insulation brick body 3.

[0036] The space between the inner wall of the outer frame 5 and the side wall of the insulation material body 4 constitutes the first molding space 6a of the side wall of the insulation brick body, and the space formed by the height difference between the outer frame 5 and the insulation material body 4 constitutes the second molding space 6b of the bottom plate of the insulation brick body.

[0037] The first molding space 6a and the second molding space 6b together constitute the molding space 6 of the thermal insulation brick body.

[0038] The thickness of the first forming space 6a is greater than 50 mm, ensuring that the thickness of the side walls around the insulation brick body 3 where the insulation material body is located is greater than 50 mm.

[0039] The height of the second forming space 6b is greater than 50 mm, ensuring that the thickness of the bottom plate of the insulation brick body 3 where the insulation material body is located is also greater than 50 mm.

[0040] The thermal insulation material body 4 is made of a composite thermal insulation brick core material;

[0041] The core material of the composite insulation brick comprises the following raw materials in percentage by mass: 90% of old sand, 5% of high-alumina cement, 5% of alkaline water glass, and a water glass curing agent in an amount of 20% by mass of the alkaline water glass.

[0042] The specific preparation method is:

[0043] (1) Mix the old sand and high-alumina cement and stir for 3 minutes;

[0044] (2) Add water glass curing agent and stir for 2 minutes;

[0045] (3) adding alkaline water glass and stirring for 2 minutes to obtain a finished mixture;

[0046] (4) Filling the finished mixture into a quadrangular pyramid mold and compacting it to form a sand mold;

[0047] (5) After 20 to 30 minutes, under the action of the curing agent, the sand mold in the tetrahedral pyramid mold forms a certain strength, and the mold is removed to obtain a tetrahedral pyramid-shaped thermal insulation material body.

[0048] The modulus of the alkaline water glass is 2.2 to 2.6.

[0049] The old sand is the discarded fused brick sand mold that cannot be reused after casting, including the sand plate and resin sand mold after casting. The discarded fused brick sand mold is crushed and selected to obtain particles smaller than 20-70 meshes to obtain the old sand.

[0050] The curing agent is glycerol diacetate.

[0051] The sand mold is disposable. After casting in the electric furnace, it is annealed and kept warm to obtain the blank fused brick. The sand mold has become waste sand and will eventually become solid waste. The discharge of solid waste will pollute the environment, and the environmental protection law does not allow and has restrictions. Therefore, the treatment of sand mold powder solid waste is an issue that must be solved.

[0052] At the same time, after casting, the sand mold of the fused brick has gone through a process of about ten days from a high temperature of 1800°C to room temperature. The main material of the sand mold is silica sand. The room temperature crystal phase of silica sand is the white tower crystal phase. After a temperature of more than 570°, it becomes an α crystal phase, and after a temperature of more than 870°, it becomes a phosphotquartz crystal phase. The phosphotquartz crystal phase has reached the limit of expansion, and there is almost no further expansion change when returning to room temperature. Because this high temperature process removes impurities on the surface of silica sand through oxidation, the purity of phosphotquartz is higher and the refractoriness is also higher. In addition, it no longer expands after the second high temperature. Therefore, in the technical solution of the present invention, the secondary use of old sand will have an auxiliary effect on the forming of fused bricks, so old sand is used as the filling main material of composite insulation bricks. It is a good choice. The current market price of silica sand used for casting is more than 600 yuan per ton. If the traditional method is adopted, the inner core of the first casting needs to be taken out and eventually becomes waste sand. If it is not used reasonably, it will be a huge waste. The inner core of the technical solution of the present application does not need to be taken out. During the specific operation, the insulation material body 4 made of the inner core material of the composite insulation brick is placed on the bottom center of the inner cavity of the outer frame 5, and the zirconium corundum electric fused brick liquid is filled into the molding space 6 between the outer frame 5 and the insulation material body 4. After annealing is completed, the molded insulation brick body is taken out from the outside, and the inner core does not need to be taken out and can be directly used as the insulation material body. While reducing the steps, it solves the problem of recycling old sand and turns waste into treasure. Not only does it save 180 yuan of internal filling materials for each composite insulation brick, but it also alleviates the difficulty of solid waste discharge. And because the filler made of old sand does not expand, the flatness of the brick surface is improved, the brick forming rate is improved, and the proportion of electric fused brick forming is assisted. The structure is novel and unique, simple and reasonable, and a tetrahedral insulation material filling groove is set at the center of the top surface of the insulation brick body, and it is fitted with the insulation material body filled inside it, so that the contact surface between the insulation material body and the insulation brick body forms an upward and inward inclined surface, forming an oblique lifting force, especially when the electric fused brick is demolded (the casting is inverted casting, and the demolding needs to be turned over), it effectively prevents the insulation material body from falling off from the mouth after drying or at a low temperature, thereby avoiding the cost waste caused by filling the insulation material again, and the traditional two steps of first casting the insulation brick body and then filling the insulation material are changed to one-time molding, without the need for secondary filling, only the surface flatness needs to be simply repaired, the brick has good integrity, and at the same time, the labor cost of the secondary filling is saved, which greatly improves the overall work efficiency. It is an innovation in the structure of zircon corundum electric fused composite insulation bricks with good social and economic benefits.

Claims

1. A zirconium corundum fused composite insulation brick structure, comprising an insulation brick body (3), a downwardly concave insulation material filling groove (31) is opened at the center of the top of the insulation brick body, and the insulation material filling groove (31) is filled with an insulation material body (4), characterized in that: The thermal insulation material filling groove (31) is in the shape of a quadrangular pyramid, and the bottom surface of the quadrangular pyramid with a larger area is located at the bottom of the thermal insulation material filling groove, and the top surface of the quadrangular pyramid with a smaller area is located at the mouth of the thermal insulation material filling groove. The thermal insulation material body (4) is in the shape of a quadrangular pyramid matching the thermal insulation material filling groove, and the bottom surface of the thermal insulation material body (4) is bonded to the bottom surface of the thermal insulation material filling groove (31), and the side walls around the thermal insulation material body (4) are bonded to the inner walls around the thermal insulation material filling groove (31); The thermal insulation material body (4) is made of a composite thermal insulation brick core material; The composite insulation brick core material comprises the following raw materials in percentage by mass: 90% of old sand, 5% of high-alumina cement, 5% of alkaline water glass; and a water glass curing agent in an amount of 20% of the mass of the alkaline water glass. The specific preparation method is: (1) Mix the old sand and high-alumina cement and stir for 3 minutes; (2) Add water glass curing agent and stir for 2 minutes; (3) Add alkaline water glass and stir for 2 minutes to obtain a finished mixture; (4) Fill the finished mixture into a tetrahedral mold and compact it to form a sand mold; (5) After 20 to 30 minutes, under the action of the curing agent, the sand mold in the quadrangular pyramid mold forms a certain strength, and the mold is removed to obtain a quadrangular pyramid-shaped thermal insulation material body; The modulus of the alkaline water glass is 2.2 to 2.6; The old sand is the discarded fused brick sand mold that cannot be reused after casting, including the sand plate and resin sand mold used for casting. The discarded fused brick sand mold is crushed and selected to obtain particles smaller than 20-70 meshes to obtain the old sand; The curing agent is glycerol diacetate.

2. The zirconium corundum fused composite thermal insulation brick structure according to claim 1 is characterized in that: The thickness of the side walls around the insulation brick body (3) where the insulation material filling groove (31) is located is greater than 50 mm.

3. The zirconium corundum fused composite thermal insulation brick structure according to claim 1 is characterized in that: The included angle between the inclined surfaces (4a) of the side walls around the thermal insulation material body (4) and the corresponding vertical surfaces is 10-30°.

4. The zirconium corundum fused composite thermal insulation brick structure according to claim 1 is characterized in that: The insulation brick body (3) is a fused zirconium corundum brick with a rectangular outer contour, the insulation material filling groove (31) is opened at the center of the upper surface of the rectangular parallelepiped, and the top surface of the insulation material body (4) is flush with the upper surface of the insulation brick body (3).

5. The zirconium corundum fused composite thermal insulation brick structure according to claim 1 is characterized in that: The thermal insulation brick body (3) is obtained by casting from a zirconium corundum fused composite thermal insulation brick casting mold; The zirconium corundum fused composite thermal insulation brick casting mold comprises an outer frame (5) and an inner core placed at the center of the bottom of the inner cavity of the outer frame, the outer frame (5) is a rectangular container-shaped hollow structure with an upper opening, the inner core is a quadrangular pyramid formed by a thermal insulation material body (4), the top surface of the quadrangular pyramid with a smaller area is located at the center of the bottom of the inner cavity of the outer frame, the bottom surface of the quadrangular pyramid with a larger area is located on the side where the upper opening of the inner cavity of the outer frame is located, and the bottom surface of the quadrangular pyramid with a larger area is lower than the upper edge of the outer frame, and the space between the outer frame (5) and the thermal insulation material body (4) constitutes a molding space (6) of the thermal insulation brick body (3).

6. The zirconium corundum fused composite thermal insulation brick structure according to claim 5 is characterized in that: The space between the inner wall of the outer frame (5) and the side wall of the thermal insulation material body (4) constitutes a first forming space (6a) of the side wall of the thermal insulation brick body, and the space formed by the height difference between the outer frame (5) and the thermal insulation material body (4) constitutes a second forming space (6b) of the bottom plate of the thermal insulation brick body.

7. The zirconium corundum fused composite thermal insulation brick structure according to claim 6 is characterized in that: The thickness of the first molding space (6a) is greater than 50 mm.

8. According to the zirconium corundum fused composite thermal insulation brick structure of claim 6, the height of the second forming space (6b) is greater than 50 mm.

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