Kiln car table brick and tunnel kiln car

Abstract

The utility model discloses a kiln car table brick and a tunnel kiln car, the upper surface of the kiln car table brick is provided with a plurality of strip-shaped grooves which are parallel to each other at intervals, and two ends of each strip-shaped groove extend to two opposite end faces of the kiln car table brick. The kiln car table brick disclosed by the utility model has the beneficial effects that the kiln car table brick overcomes the defect of the structural shape design of a tunnel kiln car table brick in the prior art; flame sprayed by the gas nozzle penetrates through the long-strip-shaped groove between the lower surface of the bottommost layer of green bricks and the brick face of the kiln car table brick under the negative pressure suction force effect of the tunnel kiln, the flame and airflow penetrate through the long-strip-shaped groove, the rear half portion of the kiln car is fully sintered, the temperature difference between the upper portion and the lower portion of a refractory brick stack calcined in the tunnel kiln is reduced, and the energy consumption is reduced. The qualified rate of finished products is improved, the gas consumption is reduced, the cost is reduced, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of refractory material production, in particular to a kiln car countertop brick and a tunnel kiln car. Background Art

[0002] Tunnel kiln is the main kiln for producing refractory brick products. Refractory bricks are made by mixing refractory raw materials in different proportions, adding binders, and stirring them into brick-making mud by wheeled mixers. The mixture is then pressed into brick blanks by a press with a capacity of more than 350T. The formed refractory brick blanks are stacked on the kiln car of the tunnel kiln and pushed into the tunnel kiln for moisture drying and high-temperature calcination. After 6-8 hours of high-temperature calcination, refractory brick products are formed. After selecting good products according to the finished product standards, they can be packaged, stored and shipped.

[0003] At present, in the prior art, the kiln car countertop bricks used for calcining refractory bricks in tunnel kilns are mostly flat in shape, and tunnel kilns often have high temperatures at the top and low temperatures at the bottom. When calcining refractory bricks, the flame temperature of the flat countertop bricks cannot penetrate from the bottom. The refractory brick blanks are stacked on the kiln car according to the size, specifications and models of the refractory brick blanks. Generally, the brick loading height is about 5-9 layers. The brick surface of a layer of brick blanks stacked at the bottom of the kiln car is attached to the brick surface of the kiln car countertop bricks, and the flame cannot penetrate through. The calcination is not good, and under-fire occurs. The calcination temperature is not enough, and the refractory bricks are not sintered well. Therefore, the lowest layer of refractory bricks in the kiln car is basically waste and needs to be returned for re-calcination, which is a great waste of manpower, material resources and energy consumption, and increases the firing cost.

[0004] In addition, although in recent years some countertop tiles with improved structural designs with cross-shaped grooves on the upper surface have appeared on the market, which has improved the calcination effect and calcination temperature of the underlying refractory bricks to a certain extent, the flame ejected from the gas nozzle of the tunnel kiln is in the middle position of the two kiln cars, and moves backward with the negative pressure airflow to burn. The cross-structured grooved kang surface will block the smooth flow of part of the airflow, and the flame and airflow flow distance in the cross-structured grooves is relatively short. The refractory bricks in the front half of the kiln car are sintered, while the refractory bricks in the back half cannot be fully sintered. Utility Model Content

[0005] The main purpose of the utility model is to provide a kiln car countertop brick and a tunnel kiln kiln car, aiming to solve the problem that the existing kiln car countertop bricks cannot completely sinter the bottom refractory brick blanks.

[0006] To solve the above problems, the utility model proposes a kiln cart countertop tile, wherein a plurality of mutually parallel long strip grooves are arranged at intervals on the upper surface of the kiln cart countertop tile, and both ends of the long strip grooves extend to the opposite end surfaces of the kiln cart countertop tile.

[0007] In one embodiment, the kiln car table tiles are in a cubic shape.

[0008] In one embodiment, the distance between two adjacent long strip grooves is equal, and the distance between two adjacent long strip grooves is 1.5 times the width of the long strip grooves.

[0009] In one embodiment, the cross-section of the elongated groove is an isosceles trapezoid, and the length of the upper base of the isosceles trapezoid is greater than the length of the lower base.

[0010] In addition, the utility model also proposes a tunnel kiln car, including a car body, wheels, kiln car refractory bricks, a placement plate and any of the aforementioned kiln car table bricks, the wheels are located at the bottom of the car body, the wheels can run on tracks, the kiln car refractory bricks are located on the upper part of the car body, the placement plate is located on the upper part of the kiln car refractory bricks, and the kiln car table bricks are located on the upper part of the placement plate.

[0011] In one embodiment, a plurality of kiln car table tiles distributed in a rectangular array are arranged on the upper surface of the placement plate, and a gap is left between two adjacent kiln car table tiles, and the gap is filled with a caulking sheet.

[0012] In one embodiment, the caulking sheet comprises sheet-shaped refractory fiber wool and refractory slurry filled in the refractory fiber wool.

[0013] In one embodiment, the upper end of the caulking piece in the gap between two adjacent kiln car table tiles located in the length direction of the long strip groove is arranged below the groove bottom of the long strip groove, so that the long strip grooves of two adjacent kiln car table tiles located in the length direction of the long strip groove are connected.

[0014] In one embodiment, the length direction of the long strip groove on the kiln car countertop tile is parallel to the travel direction of the tunnel kiln car and the length direction of the brick blank placed on the upper surface of the kiln car countertop tile.

[0015] Beneficial effects: The kiln car countertop bricks of the utility model overcome the shortcomings of the structural shape design of the kiln car countertop bricks in the prior art tunnel kiln. When the lower flame of the tunnel kiln is calcining refractory bricks, the negative pressure suction of the tunnel kiln is used to allow the flame sprayed from the gas nozzle to pass through the long strip groove between the lower surface of the bottom brick blank and the brick surface of the kiln car countertop bricks. The flame and airflow pass through the long strip groove, and the refractory brick blanks in the rear half of the kiln car are fully sintered, reducing the upper and lower temperature difference of the refractory brick blank stack calcined in the tunnel kiln, improving the qualified rate of the finished products, reducing gas consumption, and reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a structural schematic diagram of the kiln car countertop brick of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a tunnel kiln car of the utility model;

[0019] Figure 3 This is a schematic diagram of the placement of refractory bricks on the tunnel kiln car.

[0020] The following are the descriptions of the reference numerals:

[0021] 1. Countertop tiles; 2. Long grooves; 3. Placement plates; 4. Kiln car refractory bricks; 5. Car body; 6. Wheels; 7. Tracks; 8. Bricks; 9. Caulking sheets. DETAILED DESCRIPTION

[0022] 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 of 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.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0026] The utility model proposes a kiln car countertop brick 1, which overcomes the shortcomings of the structural shape design of the kiln car countertop brick 1 of the prior art tunnel kiln. When the flame at the bottom of the tunnel kiln is calcining refractory bricks, the negative pressure suction of the tunnel kiln is used to allow the flame sprayed from the gas nozzle to pass through the long strip groove 2 between the lower surface of the bottom brick blank 8 and the brick surface of the kiln car countertop brick 1. The flame and the airflow pass through the long strip groove 2, and the refractory brick blank 8 of the rear half of the kiln car is fully sintered, which reduces the upper and lower temperature difference of the stack of refractory brick blanks 8 calcined in the tunnel kiln, improves the qualified rate of the finished product, reduces the gas consumption, and reduces costs and increases efficiency.

[0027] Specifically, in an embodiment of the utility model, as Figure 1 As shown, the upper surface of the kiln car table brick 1 is provided with a plurality of mutually parallel long strip grooves 2 at intervals, and the two ends of the long strip grooves 2 extend to the two opposite end surfaces of the kiln car table brick 1, so that the long strip grooves 2 constitute through grooves. In this way, after the refractory brick blanks 8 are placed on the upper surface of the kiln car table brick 1, the flame can smoothly penetrate the long strip grooves 2, so that the refractory brick blanks 8 at the bottom layer can be fully sintered, and at the same time, the upper and lower temperature difference of the refractory brick blanks 8 stack calcined in the tunnel kiln is reduced, thereby improving the qualified rate of the finished products, reducing the gas consumption, and reducing costs and increasing efficiency.

[0028] Preferably, the kiln car countertop tile 1 is in a cubic shape, and the long strip groove 2 is in a straight line shape, with both ends extending to the two end surfaces of the kiln car countertop tile 1 in the length direction.

[0029] Furthermore, in the present embodiment, the spacing between two adjacent long strip grooves 2 is equal. This design is conducive to the full sintering of the bottom layer of refractory bricks 8, while reducing the upper and lower temperature difference of the stack of refractory bricks 8 calcined in the tunnel kiln. Preferably, the spacing between two adjacent long strip grooves 2 is 1.5 times the width of the long strip groove 2. This design well balances the relationship between the spacing between two adjacent long strip grooves 2 and the width of the long strip groove 2, and obtains the maximum groove width under the condition of safely supporting multiple stacked refractory bricks 8, increases the amount of flame entering the long strip groove 2, improves the sintering speed and efficiency, reduces gas consumption, reduces costs and increases efficiency, enables the bottom layer of refractory bricks 8 to be fully sintered, and reduces The upper and lower temperature difference of the stack of refractory brick blanks 8 calcined in the tunnel kiln improves the qualified rate of the finished products. This is because when the spacing between two adjacent long strip grooves 2 is too large, the width of the long strip groove 2 is small, the flame passing through the long strip groove 2 is small, the sintering speed and efficiency are low, the sintering time is long, and the gas consumption is large. When the spacing between two adjacent long strip grooves 2 is too small, the contact area between the lower surface of the bottom refractory brick blank 8 and the upper surface of the kiln car table brick 1 is small. The stacked refractory brick blanks 8 squeeze the bottom refractory brick blank 8, which may easily cause slight pits on the lower surface of the bottom refractory brick blank 8, affecting the quality of the refractory bricks. Therefore, it is necessary to balance the relationship between the spacing between two adjacent long strip grooves 2 and the width of the long strip groove 2.

[0030] Preferably, Figure 1 As shown, the cross section of the long strip groove 2 is an isosceles trapezoid, and the length of the upper base of the isosceles trapezoid is greater than the length of the lower base. This design facilitates the molding and demoulding of the kiln car table tile 1.

[0031] In this embodiment, the kiln car table brick 1 is a high thermal shock and high load refractory brick with an Al2O3 content greater than 65%, and can be used repeatedly.

[0032] In addition, the utility model also proposes a tunnel kiln car, such as Figure 2 and Figure 3 As shown, it includes a car body 5, wheels 6, kiln car refractory bricks 4, a placement plate 3 and any of the above-mentioned kiln car countertop bricks 1, the wheels 6 are located at the bottom of the car body 5, and the wheels 6 can run on the track 7 in the tunnel kiln, the kiln car refractory bricks 4 are located on the upper part of the car body 5, the placement plate 3 is located on the upper part of the kiln car refractory bricks 4, and the kiln car countertop bricks 1 are located on the upper part of the placement plate 3.

[0033] In this embodiment, if Figure 2 and Figure 3As shown, the upper surface of the placement plate 3 is provided with a plurality of kiln car countertop tiles 1 distributed in a rectangular array, and a gap is left between two adjacent kiln car countertop tiles 1, and the gap is filled with a caulking piece 9, which includes a sheet of refractory fiber cotton and a refractory mud filled in the refractory fiber cotton. The caulking piece 9 has the effect of thermal expansion and contraction, and can be used as an expansion joint to prevent the kiln car countertop tiles 1 from being squeezed and broken due to high-temperature expansion. At the same time, the caulking piece 9 is resistant to high temperature, and filling the gap can guide the flame to flow along the long strip groove 2 and penetrate the long strip groove 2, blocking the flame / hot air flow from flowing out of the kiln car countertop tiles 1 along the gap to cause heat loss, ensuring that the bottom layer of refractory bricks 8 are fully sintered, and at the same time reducing the upper and lower temperature difference of the stack of refractory bricks 8 calcined in the tunnel kiln, thereby improving the qualified rate of finished products, saving gas consumption, and reducing costs and increasing efficiency.

[0034] In this embodiment, the upper end of the caulking piece 9 in the gap between two adjacent kiln car table tiles 1 located in the length direction of the long strip groove 2 is set lower than the groove bottom of the long strip groove 2, so that the long strip grooves 2 of two adjacent kiln car table tiles 1 located in the length direction of the long strip groove 2 are connected, and the caulking piece 9 does not block the flame from flowing from one long strip groove 2 to another long strip groove 2, ensuring that the refractory brick blanks 8 at the bottom layer are fully sintered, while reducing the upper and lower temperature difference of the stack of refractory brick blanks 8 calcined in the tunnel kiln, thereby improving the qualified rate of finished products, saving gas consumption, and reducing costs and increasing efficiency.

[0035] In this embodiment, if Figure 3 As shown, the length direction of the long groove 2 on the kiln car countertop tile 1 is parallel to the travel direction of the tunnel kiln car and the length direction of the brick blank 8 placed on the upper surface of the kiln car countertop tile 1. This design can make full use of the limited upper surface area of ​​the kiln car countertop tile 1 to place as many refractory brick blanks 8 as possible, thereby improving the firing speed and efficiency.

[0036] When the tunnel kiln car of this embodiment is in use, Figure 3 As shown, the refractory brick blanks 8 are first dropped equidistantly onto the upper surface of the kiln car table bricks 1, and then the tunnel kiln car is pushed to move to the tunnel kiln sintering section, so that the flame at the bottom of the tunnel kiln can calcine the refractory bricks, and at the same time, the negative pressure fan is turned on to extract smoke, and the negative pressure suction of the tunnel kiln is used to allow the flame sprayed from the gas nozzle to pass through the long strip groove 2 between the lower surface of the bottom brick blank 8 and the brick surface of the kiln car table brick 1. The flame and airflow penetrate the long strip groove 2, and the bottom refractory brick blank 8 and the rear half thereof are fully sintered, thereby reducing the upper and lower temperature difference of the stack of refractory brick blanks 8 calcined in the tunnel kiln, improving the qualified rate of the finished products, reducing gas consumption, and reducing costs and increasing efficiency.

[0037] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A kiln car countertop tile, characterized in that: The upper surface of the kiln car countertop tile is provided with a plurality of mutually parallel long strip grooves at intervals, and the two ends of the long strip grooves extend to the two opposite end surfaces of the kiln car countertop tile; The cross section of the long strip groove is an isosceles trapezoid, and the length of the upper base of the isosceles trapezoid is greater than the length of the lower base.

2. A kiln car countertop tile as claimed in claim 1, characterized in that: The kiln car table tiles are in a cubic shape.

3. The kiln car countertop tile according to claim 1, characterized in that: The distance between two adjacent long strip grooves is equal, and the distance between two adjacent long strip grooves is 1.5 times the width of the long strip grooves.

4. A tunnel kiln car, characterized in that: The kiln car comprises a car body, wheels, refractory bricks of the kiln car, a placement plate and the kiln car table bricks according to any one of claims 1 to 3, wherein the wheels are located at the bottom of the car body and can run on tracks, the refractory bricks of the kiln car are located at the upper part of the car body, the placement plate is located at the upper part of the refractory bricks of the kiln car, and the table bricks of the kiln car are located at the upper part of the placement plate.

5. A tunnel kiln car as claimed in claim 4, characterized in that: The upper surface of the placement plate is provided with a plurality of kiln car table tiles distributed in a rectangular array, a gap is left between two adjacent kiln car table tiles, and the gap is filled with a caulking piece.

6. A tunnel kiln car as claimed in claim 5, characterized in that: The caulking sheet comprises sheet-shaped refractory fiber wool and refractory mud filled in the refractory fiber wool.

7. A tunnel kiln car as claimed in claim 5, characterized in that: The upper end of the caulking piece in the gap between two adjacent kiln car table tiles in the length direction of the long strip groove is arranged below the groove bottom of the long strip groove, so that the long strip grooves of two adjacent kiln car table tiles in the length direction of the long strip groove are connected.

8. A tunnel kiln car as claimed in claim 4, characterized in that: The length direction of the long strip groove on the kiln car countertop tile is parallel to the travel direction of the tunnel kiln car and the length direction of the brick blank placed on the upper surface of the kiln car countertop tile.

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