A kind of ceiling brick used for cement kiln head cover

Abstract

The present invention belongs to the technical field of refractory materials, and in particular, relates to a ceiling brick used for a cement kiln head cover. The structure of the present invention includes a brick body, an inverted T-shaped groove, a connector unit, an inverted T-shaped block, and exposed steel fibers. The mold used for forming the brick includes a sub-mold unit and a main mold unit. The suspension installation method is a multi-layer staggered inside and outside, which ultimately ensures that the fireproof and heat-insulating effects of the ceiling brick are outstanding and the effective service life is long. The present invention has the following advantages: the splicing and suspension method of the ceiling brick is vertical end face splicing, the inclined end face is separated to the left and right, and the arc surface is appropriately separated up and down. At least one of the two splicing surfaces is provided with exposed steel fibers. Compared with the method of directly fitting the splicing surfaces, appropriate space is reserved for the ceiling brick to undergo necessary mechanical vibration and thermal deformation, thereby avoiding frequent vibration crushing and deformation, extrusion and crushing of the ceiling brick.

Description

Technical Field

[0001] The invention belongs to the technical field of refractory materials, and in particular relates to a ceiling brick used for a cement kiln head cover. Background Art

[0002] The kiln hood of a cement kiln is generally located between the kiln head end and the middle section of the cylinder. On the inner top surface of the kiln hood, refractory castables or hanging bricks are used to prevent the kiln hood from being burned. The above bricks refer to the hanging bricks.

[0003] Existing ceiling brick products, such as the Chinese invention patent with patent publication number CN104034163A and publication date 2014.09.10, disclose a kiln head hood ceiling hanging brick. The structure of the ceiling hanging brick includes a brick body and a hanging block, the brick body includes an upper body and a lower body; the upper body includes a lower part and an upper part, the left and right width of the upper part is smaller than the left and right width of the lower part; each of the left and right side walls of the upper part is provided with a groove penetrating the upper part in the front-to-back direction; each of the left and right side walls of the hanging block is provided with a stopper matching the groove; when two adjacent left and right brick bodies are attached together, a stopper groove matching the lower part of the hanging block is formed between the two brick bodies.

[0004] However, the top-hanging bricks in this invention patent have at least the following two problems during use.

[0005] First, the gaps between the ceiling bricks are still too large for the flames and heat. A certain amount of flames will still rush upwards and slowly burn the kiln hood.

[0006] Second, the above-mentioned gap is too small for mechanical vibration and thermal deformation, and the top-hanging bricks are easily broken by vibration or extrusion.

[0007] Therefore, it is necessary to improve the ceiling bricks themselves and / or the installation method, the purpose of which is to more comprehensively insulate and protect the kiln head cover and extend the effective service life of the ceiling bricks themselves. Summary of the invention

[0008] The present invention provides a ceiling brick for a kiln head cover of a cement kiln. The structure of the ceiling brick comprises a brick body, an inverted T-shaped groove, a connector unit, an inverted T-shaped block, and exposed steel fibers. A molding mold comprises a secondary mold unit and a main mold unit. The hanging installation method is a multi-layer staggered inside and outside, which ultimately ensures that the ceiling brick has an outstanding fireproof and heat-insulating effect and a long effective service life.

[0009] The technical solution adopted by the present invention to solve the above-mentioned problem is: a ceiling brick for a cement kiln head cover, comprising a brick body, an inverted T-shaped groove arranged on the splicing end surface and the upper surface of the brick body, a connecting unit arranged on the inverted T-shaped groove and suspended on a mounting rod, an inverted T-shaped block arranged on the other splicing end surface of the brick body and used for inserting into the inverted T-shaped groove of an adjacent ceiling brick, and exposed steel fibers arranged on the splicing end surface of the brick body provided with the inverted T-shaped groove.

[0010] A further preferred technical solution is that the vertical cross-section of the brick body is in the shape of a fan ring, and the two joint end faces are both vertical faces.

[0011] A further preferred technical solution is that the connector unit includes an inverted T-shaped strip arranged on the inverted T-shaped groove, and a suspension ring arranged on the inverted T-shaped strip and used for sleeve-connecting the mounting rod.

[0012] A further preferred technical solution is that the raw material composition of the brick body includes explosion-proof steel fibers.

[0013] A further preferred technical solution is that the length of the exposed steel fiber is 2.5-3.5 cm and the cross-sectional area is 0.2-0.4 mm 2 , the amount used on the splicing end surface is 2-5 pieces / cm 2 .

[0014] A further preferred technical solution is that the groove depth of the inverted T-shaped groove is 40-45% of the length of the brick body.

[0015] A further preferred technical solution is that the inclined side surfaces of the ceiling bricks are separated from each other to be used for installing the connecting unit of the ceiling bricks below, the distance between the arc-shaped upper surface of the ceiling bricks below and the arc-shaped lower surface of the ceiling bricks above is 0.6-1.0mm, and the number of suspended installation layers of the ceiling bricks in the kiln head hood is at least 2.

[0016] A forming mold for ceiling bricks of a cement kiln head cover, the structure includes a sub-mold unit for forming the inverted T-shaped groove, and a main mold unit for forming the inverted T-shaped block. The exposed steel fibers are first laid on the inner bottom surface of the sub-mold unit before pouring the ceiling brick mixture.

[0017] A further preferred technical solution is that the auxiliary mold unit includes a first mold shell with a fan-shaped cross-section, and a T-shaped protrusion strip arranged on the inner bottom surface of the first mold shell and used to form the inverted T-shaped groove, and the length of the T-shaped protrusion strip is equal to the depth of the first mold shell.

[0018] A further preferred technical solution is that the main mold unit includes a second mold shell having a fan-shaped cross-section and used to dock with the first mold shell, a T-shaped opening arranged on the bottom plate of the second mold shell, an outer T-shaped cavity arranged on the T-shaped opening, and a mixture adding hole arranged on the outer T-shaped cavity.

[0019] The present invention has the following advantages.

[0020] First, the splicing and suspension method of the ceiling bricks is vertical end face splicing, left and right separation of the inclined end faces, and appropriate up and down separation between the curved surfaces. At least one of the two splicing surfaces is provided with exposed steel fibers. Compared with the method of directly fitting the splicing surfaces, appropriate space is left for the ceiling bricks to undergo necessary mechanical vibration and thermal deformation, thereby avoiding frequent vibration breakage and deformation, extrusion and crushing of the ceiling bricks.

[0021] Secondly, the exposed steel fibers in the above-mentioned joint gaps not only have the function of elastic support, but also can block the upward flames and further protect the kiln head cover.

[0022] Third, the gaps between the ceiling bricks, which are at least two layers above and below, are staggered left and right, so the gap path is longer and more curved, making it less likely for the flames to burn the kiln head cover.

[0023] Fourth, the exposed steel fibers can be pre-laid on the inner bottom surface of the auxiliary mold unit, or added and flattened in the main mold unit before pouring to form an inverted T-shaped block, to ensure that the exposed steel fibers have sufficient fixing strength on the splicing end surface and an appropriate exposed length.

[0024] Fifth, between the ceiling bricks on the same layer above and below, there is a plug-in relationship between the inverted T-shaped blocks and the inverted T-shaped grooves to ensure that the splicing structure of the ceiling bricks is more stable.

[0025] Sixth, the inclined side gaps between the left and right ceiling tiles provide appropriate space for mechanical vibration and thermal deformation, and the gaps between the upper ceiling tiles are exactly the installation positions of the connector units of the lower ceiling tiles, making the installation structure of the entire ceiling tiles more compact and ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the ceiling brick in the present invention.

[0027] Figure 2 It is a schematic diagram of the position structure of the inverted T-shaped groove and the inverted T-shaped block in the present invention.

[0028] Figure 3 It is a schematic diagram of the suspension installation method of the connecting unit in the present invention.

[0029] Figure 4 It is a schematic diagram of the installation method of the upper and lower layers of ceiling tiles in the present invention.

[0030] Figure 5 It is a schematic diagram of the position of the exposed steel fibers and the mold joint in the present invention.

[0031] Figure 6 It is a structural schematic diagram of the auxiliary mold unit in the present invention.

[0032] Figure 7 It is a schematic diagram of the cross-sectional structure of the main mold unit in the present invention.

[0033] In the accompanying drawings, the components represented by various numbers have the following meanings: mounting rod a, mold joint b, brick body 1, inverted T-shaped groove 2, connector unit 3, inverted T-shaped block 4, exposed steel fiber 5, inverted T-shaped strip 301, suspension ring 302, auxiliary mold unit 6, main mold unit 7, first mold shell 601, T-shaped raised strip 602, second mold shell 701, T-shaped opening 702, outer T-shaped cavity 703, mixture adding hole 704. DETAILED DESCRIPTION

[0034] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0035] As attached Figure 1-7 As shown, a ceiling brick for a cement kiln head cover comprises a brick body 1, an inverted T-shaped groove 2 arranged on the splicing end surface and the upper surface of the brick body 1, a connector unit 3 arranged on the inverted T-shaped groove 2 and suspended on a mounting rod a, an inverted T-shaped block 4 arranged on the other splicing end surface of the brick body 1 and used for inserting into the inverted T-shaped groove 2 of an adjacent ceiling brick, and exposed steel fibers 5 arranged on the splicing end surface of the brick body 1 where the inverted T-shaped groove 2 is provided.

[0036] In this embodiment, the raw materials of the brick body 1 include commonly used alumina, mullite, brown corundum, silicon carbide, silicon powder, and high-alumina cement, etc. The shape of the existing kiln head cover is generally dome-shaped, so multiple mounting rods a are first arranged in an arc shape, and then refractory bricks are hung, so that the kiln head cover can be fully fire-proofed.

[0037] In addition, the ceiling bricks on the same mounting rod a are spliced, and the ceiling bricks on adjacent mounting rods a are separated. The former ensures sufficient splicing protection and flame blocking effect, while the latter leaves sufficient and appropriate mechanical vibration space and thermal deformation space for the ceiling bricks.

[0038] Finally, there are more than one layer of ceiling bricks, and they are staggered with each other. Therefore, the original partitions of the ceiling bricks can still be covered by the ceiling bricks below, and the path for the flames to rush upwards is more "tortuous", ultimately achieving the combined advantages of separation without leaking flames.

[0039] The vertical cross-section of the brick body 1 is in the shape of a sector ring, and the two joint end faces are both vertical faces.

[0040] In this embodiment, the two inclined side surfaces of the fan ring are the partitions of the ceiling tiles, and the partition size is 2-3 cm, ensuring that the installation rod a and the connector unit 3 have sufficient installation space here.

[0041] The connector unit 3 includes an inverted T-shaped strip 301 disposed on the inverted T-shaped groove 2 and a suspension ring 302 disposed on the inverted T-shaped strip 301 and used for sleeve connection with the mounting rod a.

[0042] In this embodiment, the materials of the mounting rod a and the connecting unit 3 are both high-strength steel with a melting point of more than 1500° C., which is higher than the working temperature of the kiln hood of 1200-1300° C.

[0043] The raw material composition of the brick body 1 includes explosion-proof steel fibers.

[0044] In this embodiment, the material of the explosion-proof steel fiber is the same as that of the exposed steel fiber 5. The two are only different in size, but their functions are completely different. The addition of the explosion-proof steel fiber is to improve the thermal shock resistance of the brick body 1, while the addition of the exposed steel fiber 5 has two functions.

[0045] First, no matter how tightly the brick bodies 1 are attached, there will inevitably be gaps at the joints, and the flames will still jump up at the joint gaps. Therefore, the exposed steel fibers 5 are arranged to form a flame interception structure to prevent the flames from burning the kiln head cover as much as possible.

[0046] Second, the horizontal joint gap of the brick body 1, that is, the gap between adjacent brick bodies 1 in the length direction in the same layer, is set to 0.3-0.5 cm, which must ensure sufficient mechanical vibration space and thermal deformation space, but it cannot be too large, otherwise the "fireproof net" structure of the exposed steel fiber 5 will become invalid.

[0047] However, the mechanical vibration amplitude of the brick body 1 may still exceed the gap width. At this time, the exposed steel fibers 5 have an elastic buffering function, which greatly reduces the vibration impact amplitude of the brick body 1 and avoids the brick body 1 from being smashed to the greatest extent.

[0048] The exposed steel fiber 5 has a length of 2.5-3.5 cm and a cross-sectional area of ​​0.2-0.4 mm 2 , the amount used on the splicing end surface is 2-5 pieces / cm 2 .

[0049] In this embodiment, the exposed steel fibers 5 need to be embedded at a sufficient and appropriate depth to prevent them from falling off, and at a sufficient and appropriate exposed length to ensure that their fireproof net function and elastic support function can be efficiently realized. Therefore, the size and amount of the exposed steel fibers themselves are very particular. When the exposed steel fibers are too long or too short, too thick or too thin, too much or too little, they will fall off to varying degrees, fireproofing is insufficient, and elastic support is insufficient. Therefore, the above numerical range is determined.

[0050] The groove depth of the inverted T-shaped groove 2 is 40-45% of the length of the brick body 1.

[0051] In this embodiment, the length of the inverted T-shaped block 4 needs to ensure that it "fills" at least half of the depth of the inverted T-shaped groove 2 to ensure that the two adjacent brick bodies 1 are stably spliced ​​and not easy to fall off. After all, the connecting unit 3 is not located in the middle of the brick body 1.

[0052] In addition, the transverse groove depth of the inverted T-shaped groove 2 is relatively small in order to avoid significantly reducing the structural strength of the brick body 1.

[0053] A forming mold for ceiling bricks of a cement kiln head cover, the structure includes a sub-mold unit 6 for forming the inverted T-shaped groove 2, and a main mold unit 7 for forming the inverted T-shaped block 4. The exposed steel fiber 5 is first laid on the inner bottom surface of the sub-mold unit 6 before pouring the ceiling brick mixture.

[0054] In this embodiment, the joint between the auxiliary mold unit 6 and the main mold unit 7 is the inner end surface of the inverted T-shaped groove 2, that is, the mold joint b.

[0055] In addition, the density of the exposed steel fibers 5 laid on the inner bottom surface of the auxiliary mold unit 6 is 7-11 fibers / cm 2 The steel fiber itself has an appropriate drop amount. The above laying density can ensure that 2-5 fibers / cm are finally obtained on the splicing end surface. 2 The steel fibers are embedded with a fixed density.

[0056] In addition, a sufficiently large laying density is also to allow the steel fibers to be stacked, ensuring that the upper steel fibers can be properly inserted into the refractory mixture and eventually become qualified exposed steel fibers 5.

[0057] The auxiliary mold unit 6 includes a first mold shell 601 with a fan-shaped cross-sectional shape, and a T-shaped protruding strip 602 arranged on the inner bottom surface of the first mold shell 601 and used to form the inverted T-shaped groove 2, and the length of the T-shaped protruding strip 602 is equal to the depth of the first mold shell 601.

[0058] The main mold unit 7 includes a second mold shell 701 having a fan-shaped cross-section and used to dock with the first mold shell 601, a T-shaped opening 702 arranged on the bottom plate of the second mold shell 701, an outer T-shaped cavity 703 arranged on the T-shaped opening 702, and a mixture adding hole 704 arranged on the outer T-shaped cavity 703.

[0059] In this embodiment, the inverted T-shaped block 4 is formed in the outer T-shaped cavity 703, and finally the brick body blank is baked and shaped to form the brick body 1. The shaping method and working condition parameters adopt the existing process and existing standards.

[0060] The inclined sides of the ceiling bricks are separated from each other so as to be used for installing the connector unit 3 of the ceiling bricks below. The distance between the arc-shaped upper surface of the ceiling bricks below and the arc-shaped lower surface of the ceiling bricks above is 0.6-1.0 mm. The number of suspended installation layers of the ceiling bricks in the kiln head cover is at least 2.

[0061] In this embodiment, it is precisely because of the structural style of the multi-layer ceiling tiles that even a 0.6-1.0mm upper and lower surface gap, that is, the vertical gap between layers, can effectively prevent the flame from rising. After all, the upward path of the flame is more tortuous and longer.

[0062] Of course, the above distance interval of 0.6-1.0 mm is also to leave enough and appropriate space for the mechanical vibration and thermal deformation of the brick body 1.

[0063] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A ceiling brick for a cement kiln head cover, characterized in that: The invention comprises a brick body (1), an inverted T-shaped groove (2) provided on the splicing end surface and the upper surface of the brick body (1), a connector unit (3) provided on the inverted T-shaped groove (2) and suspended on a mounting rod (a), an inverted T-shaped block (4) provided on the other splicing end surface of the brick body (1) and used for being inserted into the inverted T-shaped groove (2) of an adjacent ceiling brick, and exposed steel fibers (5) provided on the splicing end surface of the brick body (1) provided with the inverted T-shaped groove (2). The vertical cross-section of the brick body (1) is in the shape of a fan ring, and the two joint end faces are both vertical faces. The connector unit (3) comprises an inverted T-shaped strip (301) arranged on the inverted T-shaped groove (2), and a suspension ring (302) arranged on the inverted T-shaped strip (301) and used for sleeve-connecting the mounting rod (a). The inclined side surfaces of the ceiling bricks are separated from each other so as to be used for installing the connecting piece unit (3) of the ceiling bricks below. The distance between the arc-shaped upper surface of the ceiling bricks below and the arc-shaped lower surface of the ceiling bricks above is 0.6-1.0 mm. The ceiling bricks are suspended and installed in at least two layers in the kiln head cover.

2. The ceiling brick for cement kiln head cover according to claim 1, characterized in that: The raw material composition of the brick body (1) includes explosion-proof steel fibers.

3. The ceiling brick for cement kiln head cover according to claim 1, characterized in that: The exposed steel fiber (5) has a length of 2.5-3.5 cm and a cross-sectional area of ​​0.2-0.4 mm 2 , the amount used on the splicing end surface is 2-5 pieces / cm 2 .

4. The ceiling brick for cement kiln head cover according to claim 1, characterized in that: The groove depth of the inverted T-shaped groove (2) is 40-45% of the length of the brick body (1).

5. A forming mold for the ceiling bricks of the cement kiln head cover according to claim 1, characterized in that: The structure comprises a secondary mold unit (6) for forming the inverted T-shaped groove (2), and a main mold unit (7) for forming the inverted T-shaped block (4); the exposed steel fibers (5) are first laid on the inner bottom surface of the secondary mold unit (6) before pouring the ceiling brick mixture.

6. The forming mold for the ceiling bricks of the cement kiln head cover according to claim 5, characterized in that: The auxiliary mold unit (6) comprises a first mold shell (601) having a fan-shaped cross-sectional shape, and a T-shaped protruding strip (602) arranged on the inner bottom surface of the first mold shell (601) and used to form the inverted T-shaped groove (2), wherein the length of the T-shaped protruding strip (602) is equal to the depth of the first mold shell (601).

7. The forming mold for the ceiling bricks of the cement kiln head cover according to claim 6 is characterized in that: The main mold unit (7) comprises a second mold shell (701) having a fan-shaped cross-section and used to dock with the first mold shell (601), a T-shaped opening (702) arranged on the bottom plate of the second mold shell (701), an outer T-shaped cavity (703) arranged on the T-shaped opening (702), and a mixture adding hole (704) arranged on the outer T-shaped cavity (703).

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