CN110207495B - Refractory brick for rotary kiln - Google Patents
Refractory brick for rotary kiln Download PDFInfo
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- CN110207495B CN110207495B CN201910403564.2A CN201910403564A CN110207495B CN 110207495 B CN110207495 B CN 110207495B CN 201910403564 A CN201910403564 A CN 201910403564A CN 110207495 B CN110207495 B CN 110207495B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
- F27D1/06—Composite bricks or blocks, e.g. panels, modules
- F27D1/063—Individual composite bricks or blocks
- F27D1/066—Individual composite bricks or blocks made from hollow bricks filled up with another material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention belongs to the technical field of refractory materials, and particularly relates to a refractory brick for a rotary kiln; the vacuum insulation brick comprises a refractory brick body, wherein a group of blind holes are formed in the refractory brick body in the vertical direction, the blind holes are formed for reducing the stress of the refractory brick body, the opening of each blind hole is positioned on the working surface of the refractory brick body, one end, far away from the opening, in each blind hole is filled with a firing expansion material, the volume of the firing expansion material is about one half of that of each blind hole, and a vacuum insulation plate is placed in each blind hole; the refractory brick body is additionally provided with a heat collecting hole which is communicated with a blind hole at which the sintering expansion material is placed; the invention has simple structure, and improves the heat insulation property of the refractory brick body while improving the strength of the refractory brick body by arranging the blind hole in the refractory brick body and placing the sintering expansion material, the arc-shaped plate and the vacuum insulation plate in the blind hole.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to a refractory brick for a rotary kiln.
Background
The rotary kiln is a rotary calcining kiln (commonly called rotary kiln) and belongs to the building material equipment, and can be divided into a cement kiln, a metallurgical chemical kiln and a lime kiln according to different materials to be treated; the cement kiln is mainly used for calcining cement clinker and comprises two major categories of a dry-method production cement kiln and a wet-method production cement kiln; the metallurgical chemical kiln is mainly used for magnetizing and roasting lean iron ore in steel plants in the metallurgical industry; oxidizing and roasting chromium and nickel iron ores; roasting bauxite in a refractory material plant, roasting clinker in an aluminum plant and aluminum hydroxide; roasting chromium ore sand, chromium ore powder and other minerals in a chemical plant. Lime kilns (i.e., active lime kilns) are used for roasting active lime and lightly calcined dolomite used in steel plants and iron and alloy plants.
The rotary kiln is mainly constructed by stacking a layer of refractory bricks in the interior, and laying a heat insulation layer on the outermost layer to reduce the heat loss in the rotary kiln, and if the refractory bricks in the rotary kiln have higher strength, corresponding through holes can be formed in the rotary kiln to reduce the internal stress and achieve the purpose of high strength.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problem that the strength and the heat insulation performance of the refractory brick for the rotary kiln cannot be simultaneously ensured in the prior art, the invention provides the refractory brick for the rotary kiln.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a rotary kiln refractory brick, which comprises a refractory brick body, wherein a group of blind holes are formed in the refractory brick body in the vertical direction and used for reducing the stress of the refractory brick body, the opening of each blind hole is positioned on the working surface of the refractory brick body, one end, far away from the opening, in each blind hole is filled with a firing expansion material, the volume of the firing expansion material is about one half of that of each blind hole, and a vacuum insulation plate is placed in each blind hole; the refractory brick body is additionally provided with a heat collecting hole, the heat collecting hole is communicated with the blind hole at which the sintering expansion material is placed, and hot air in the heat collecting hole enters into the heat collecting hole and then expands the sintering expansion material to push the vacuum heat insulation plate out to seal the opening of the blind hole; when the refractory brick body is manufactured, firstly, raw materials for manufacturing the refractory brick body are placed into a corresponding mold, the mold can be manufactured according to the shape of the refractory brick body, after the refractory brick body is fired, a firing expansion material is placed into a blind hole of the refractory brick body, and a vacuum insulation panel is placed into the blind hole; after the refractory brick body is piled into the rotary kiln, the working surface is close to the fired material of the rotary kiln, so that the rotary kiln is in a non-working process, because the blind holes and the heat collecting holes are formed in the refractory brick body, the manufacturing cost of the refractory brick can be saved, the stress of the refractory brick body can be reduced, the strength of the refractory brick body is improved, and the strength of the whole rotary kiln is improved; in the working process of the rotary kiln, the air inside the rotary kiln is heated by the high temperature generated inside the rotary kiln, and the hot air enters the rotary kiln through the heat collecting holes in the refractory brick body, so that on one hand, the phenomenon that the rotary kiln collapses due to local fracture of the refractory brick body caused by overhigh temperature of the working surface of the refractory brick body can be prevented; on the other hand, hot air enters the heat collecting hole and then enters the blind hole along the heat collecting hole, so that the fired expansion material in the blind hole expands to push the vacuum heat insulation plate out to the opening of the blind hole, and the blind hole can be filled after the fired expansion material expands due to the fact that the vacuum heat insulation plate has good heat insulation performance, so that the heat insulation performance of the refractory brick body is improved, and heat loss in the rotary kiln is reduced.
Preferably, an arc-shaped plate is fixedly connected to one end, far away from the sintering expansion material, of the vacuum heat-insulating plate, the arc-shaped plate is made of polycrystalline alumina fibers, the diameter of the arc-shaped plate is 5-6 mm larger than the inner diameter of the blind hole, and the arc-shaped plate is used for being matched with the vacuum heat-insulating plate to insulate heat; when the vacuum insulation board is pushed out by the sintered expansion material, the arc-shaped board is pushed out along with the vacuum insulation board, and the opening of the blind hole can be sealed by matching with the vacuum insulation board, so that the heat insulation property of the refractory brick body is improved.
Preferably, the arc-shaped plate is of a hollow structure, and fire clay is filled in the arc-shaped plate; l-shaped limiting blocks which are symmetrically arranged are arranged at the opening of the blind hole, and the arc-shaped plate is in contact with the L-shaped limiting blocks to form a bulge; because of the arc intussuseption is filled with fire clay, when the arc was pushed to the opening part of blind hole and when contacting with L type stopper, the arc was because of receiving the restriction of L type stopper, the heat-resisting clay in middle part removed to the both sides of arc in the arc, the heat-resisting clay of arc both sides increases, the heat-resisting clay in middle part reduces, make the arc contact the back with L type stopper, form the arch, the protruding area of contact that can reduce resistant firebrick body hot-air has improved resistant firebrick body's heat-proof quality.
Preferably, the inner wall of the blind hole needs to be polished to reduce the roughness of the inner wall of the blind hole, and the roughness is used for reducing the adsorption of dust in the blind hole and accelerating the pushing speed of the vacuum heat insulation plate and the arc-shaped plate; the blind hole is polishing the back, and its roughness reduces, makes things convenient for the release of vacuum insulation panels and arc, simultaneously, also can reduce its inside content of adhering to the dust, prevents that too much dust from influencing vacuum insulation panels and arc and releasing, causes the condition that the refractory brick body heat-proof quality reduces.
Preferably, the cross-sectional structure of the heat collecting hole is stepped, the inner diameter of the heat collecting hole is sequentially reduced from the working surface to the non-working surface of the firebrick body, and the sequentially reduced heat collecting holes are used for increasing the pressure of hot air entering the firebrick body; after the hot air enters the heat collecting holes, because the inner diameters of the heat collecting holes from the working surface to the non-working surface of the refractory brick body are sequentially reduced, the pressure of the hot air entering the heat collecting holes is continuously increased, so that the contact speed of the burning expansion material and the hot air can be increased, and the hot air can be rapidly expanded to push out the arc-shaped plate and the vacuum insulation plate.
Preferably, an inclined rod is fixedly connected to one end of the heat collecting hole, which is close to the working surface, a wavy fire-resistant strip is arranged on the inclined rod, the surface of the fire-resistant strip is roughened, and the fire-resistant strip is used for adsorbing dust entering from the heat collecting hole; when hot air enters the heat collecting holes, the fireproof strips in the heat collecting holes can adsorb dust in the hot air after roughening treatment, and the condition that the heat collecting holes are blocked due to excessive dust brought by the hot air in the heat collecting holes is reduced, so that the heat insulation of the whole refractory brick body is influenced.
When the refractory brick body is manufactured, firstly, raw materials for manufacturing the refractory brick body are placed into a corresponding mold, the mold can be manufactured according to the shape of the refractory brick body, after the refractory brick body is fired, a firing expansion material is placed into a blind hole of the refractory brick body, and a vacuum insulation panel is placed into the blind hole; after the refractory brick body is piled into the rotary kiln, the working surface is close to the fired material of the rotary kiln, so that the rotary kiln is in a non-working process, because the blind holes and the heat collecting holes are formed in the refractory brick body, the manufacturing cost of the refractory brick can be saved, the stress of the refractory brick body can be reduced, the strength of the refractory brick body is improved, and the strength of the whole rotary kiln is improved; in the working process of the rotary kiln, the air inside the rotary kiln is heated by the high temperature generated inside the rotary kiln, and the hot air enters the rotary kiln through the heat collecting holes in the refractory brick body, so that on one hand, the phenomenon that the rotary kiln collapses due to local fracture of the refractory brick body caused by overhigh temperature of the working surface of the refractory brick body can be prevented; on the other hand, hot air enters the heat collecting hole and then enters the blind hole along the heat collecting hole, so that the fired expansion material in the blind hole expands to push the vacuum heat insulation plate out to the opening of the blind hole, and the blind hole can be filled after the fired expansion material expands, so that the heat insulation property of the refractory brick body is improved, and the heat loss in the rotary kiln is reduced; when the vacuum heat insulation plate is pushed out by the sintered expansion material, the arc-shaped plate is pushed out along with the vacuum heat insulation plate, and the opening of the blind hole can be sealed by matching with the vacuum heat insulation plate, so that the heat insulation property of the refractory brick body is improved; because the arc-shaped plate is filled with the fire clay, when the arc-shaped plate is pushed to the opening of the blind hole and is in contact with the L-shaped limiting block, the heat-resistant clay in the middle of the arc-shaped plate moves to two sides of the arc-shaped plate due to the limitation of the L-shaped limiting block, the heat-resistant clay on two sides of the arc-shaped plate is increased, the heat-resistant clay in the middle of the arc-shaped plate is reduced, and after the arc-shaped plate is in contact with the L-shaped limiting block, a bulge is formed, so that the contact area of hot air of the refractory brick body can; after the blind holes are polished, the roughness of the blind holes is reduced, the vacuum heat insulation plate and the arc-shaped plate can be conveniently pushed out, meanwhile, the content of dust attached to the interior of the blind holes can be reduced, and the situation that the heat insulation performance of the refractory brick body is reduced due to the fact that the pushing out of the vacuum heat insulation plate and the arc-shaped plate is influenced by excessive dust is prevented; after the hot air enters the heat collecting holes, because the inner diameters of the heat collecting holes from the working surface to the non-working surface of the refractory brick body are sequentially reduced, the pressure of the hot air entering the heat collecting holes is continuously increased, so that the contact speed of the fired expansion material and the hot air can be increased, and the expansion material can be rapidly expanded to push out the arc-shaped plate and the vacuum insulation plate; when hot air enters the heat collecting holes, the fireproof strips in the heat collecting holes can adsorb dust in the hot air after roughening treatment, and the condition that the heat collecting holes are blocked due to excessive dust brought by the hot air in the heat collecting holes is reduced, so that the heat insulation of the whole refractory brick body is influenced.
The invention has the following beneficial effects:
1. the refractory brick for the rotary kiln is simple in structure, and the firing expansion material, the arc-shaped plate and the vacuum insulation plate are placed in the blind hole by arranging the blind hole in the refractory brick body, so that the strength of the refractory brick body is improved, and meanwhile, the heat insulation performance of the refractory brick body is improved.
2. The refractory brick for the rotary kiln is ingenious in design, and the arc-shaped plate and the L-shaped limiting block are matched with each other, so that the arc-shaped plate forms a bulge at one end of the working surface of the refractory brick body after the burnt expanding material is pushed out. Reduce the area of contact of firebrick body and heat, further improve the heat-proof quality of firebrick body.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a front view of the present invention;
FIG. 2 is a schematic view of the working state of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is an enlarged view of a portion of FIG. 1 at B;
FIG. 5 is an enlarged view of a portion of FIG. 2 at C;
in the figure: the heat-insulating brick comprises a refractory brick body 1, blind holes 2, a vacuum heat-insulating plate 3, heat collecting holes 4, an arc-shaped plate 5, an L-shaped limiting block 6, an inclined rod 7 and refractory strips 8.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 5, the refractory brick for the rotary kiln comprises a refractory brick body 1, wherein a group of blind holes 2 are formed in the refractory brick body 1 in the vertical direction, the blind holes 2 are formed for reducing the stress of the refractory brick body 1, the opening of each blind hole 2 is positioned on the working surface of the refractory brick body 1, one end, far away from the opening, in each blind hole 2 is filled with a firing expansion material, the volume of the firing expansion material is about one half of the volume of the blind hole 2, and a vacuum insulation panel 3 is placed in each blind hole 2; the refractory brick body 1 is additionally provided with a heat collecting hole 4, the heat collecting hole 4 is communicated with the blind hole 2 where the fired expansion material is placed, hot air enters the heat collecting hole 4, the fired expansion material expands to push the vacuum insulation panel 3 out to seal the opening of the blind hole 2; when the refractory brick body 1 is manufactured, firstly, raw materials for manufacturing the refractory brick body 1 are put into corresponding dies, the dies can be manufactured according to the shape of the refractory brick body 1, after the refractory brick body 1 is fired, a firing expansion material is put into blind holes 2 of the refractory brick body 1, and a vacuum insulation panel 3 is put into the blind holes 2; after the refractory brick body 1 is piled into the rotary kiln, the working surface is close to the fired material of the rotary kiln, so that the blind hole 2 and the heat collecting hole 4 are formed in the refractory brick body 1 in the non-working process of the rotary kiln, the manufacturing cost of the refractory brick can be saved, the stress of the refractory brick body 1 can be reduced, the strength of the refractory brick body is improved, and the strength of the whole rotary kiln is improved; in the working process of the rotary kiln, the air inside the rotary kiln is heated by the high temperature generated inside the rotary kiln, and the hot air enters the rotary kiln through the heat collecting holes 4 on the refractory brick body 1, so that on one hand, the phenomenon that the rotary kiln collapses because the local fracture of the working surface of the refractory brick body 1 is caused by overhigh temperature can be prevented; on the other hand, after the hot air enters the heat collecting hole 4, the hot air enters the blind hole 2 along the heat collecting hole 4, so that the sintering expansion material in the blind hole 2 expands to push the vacuum heat insulation plate 3 out to the opening of the blind hole 2, and the vacuum heat insulation plate 3 has good heat insulation performance, and the blind hole 2 can be filled after the sintering expansion material expands, so that the heat insulation performance of the refractory brick body 1 is improved, and the heat loss in the rotary kiln is reduced.
As a specific embodiment of the invention, an arc-shaped plate 5 is fixedly connected to one end of the vacuum heat-insulating plate 3, which is far away from the burning expansion material, the arc-shaped plate 5 is made of polycrystalline alumina fiber, the diameter of the arc-shaped plate 5 is 5-6 mm larger than the inner diameter of the blind hole 2, and the arc-shaped plate 5 is used for being matched with the vacuum heat-insulating plate 3 for heat insulation; when the vacuum heat insulation plate 3 is pushed out by the sintered expansion material, the arc-shaped plate 5 is pushed out along with the vacuum heat insulation plate 3, and the opening of the blind hole 2 can be sealed by matching with the vacuum heat insulation plate 3, so that the heat insulation performance of the refractory brick body 1 is improved.
As a specific embodiment of the present invention, the arc-shaped plate 5 is a hollow structure, and the interior of the hollow structure is filled with fire-resistant clay; l-shaped limiting blocks 6 which are symmetrically arranged are arranged at the opening of the blind hole 2, and the arc-shaped plate 5 and the L-shaped limiting blocks 6 form a bulge after contacting; because of the intussuseption of arc 5 is filled with chamotte, when arc 5 was pushed to the opening part of blind hole 2 and when contacting with L type stopper 6, arc 5 is because of the restriction that receives L type stopper 6, the heat-resisting clay in middle part removes to the both sides of arc 5 in the arc 5, the heat-resisting clay of arc 5 both sides increases, the heat-resisting clay at middle part reduces, make arc 5 contact the back with L type stopper 6, form the arch, the protruding area of contact that can reduce 1 hot-air of resistant firebrick body, the heat-proof quality of resistant firebrick body 1 has been improved.
As a specific embodiment of the present invention, the inner wall of the blind hole 2 needs to be polished to reduce the roughness of the inner wall of the blind hole 2, and the roughness is used to reduce the adsorption of dust in the blind hole 2 and to accelerate the pushing speed of the vacuum insulation panel 3 and the arc-shaped panel 5; blind hole 2 is polishing the processing back, and its roughness reduces, makes things convenient for pushing out of vacuum insulation panels 3 and arc 5, simultaneously, also can reduce its inside content of adhering to the dust, prevents that too much dust from influencing vacuum insulation panels 3 and arc 5 and pushing out, causes the condition that the 1 heat-proof quality of firebrick body reduces.
As a specific embodiment of the present invention, the cross-sectional structure of the heat collecting hole 4 is stepped, and the inner diameters of the heat collecting hole 4 from the working surface to the non-working surface of the firebrick body 1 are sequentially reduced, and the sequentially reduced heat collecting hole 4 is used to increase the pressure of hot air entering the interior thereof; after the hot air enters the heat collecting holes 4, because the inner diameters of the heat collecting holes 4 from the working surface to the non-working surface of the refractory brick body 1 are sequentially reduced, the pressure of the hot air entering the heat collecting holes 4 is continuously increased, so that the contact speed of the burning expansion material and the hot air can be increased, and the hot air can be rapidly expanded to push out the arc-shaped plate 5 and the vacuum heat-insulating plate 3.
As a specific embodiment of the present invention, an inclined rod 7 is fixedly connected to one end of the heat collecting hole 4 close to the working surface, a wavy fire-resistant strip 8 is arranged on the inclined rod 7, the surface of the fire-resistant strip 8 is roughened, and the fire-resistant strip 8 is used for adsorbing dust entering from the heat collecting hole 4; when hot air enters the heat collecting holes 4, the fireproof strips 8 in the heat collecting holes 4 can adsorb dust in the hot air after roughening treatment, so that the condition that the heat collecting holes 4 are blocked due to excessive dust brought by the hot air in the heat collecting holes 4 is reduced, and the heat insulation of the whole refractory brick body 1 is influenced.
When the refractory brick body 1 is manufactured, firstly, raw materials for manufacturing the refractory brick body 1 are put into corresponding dies, the dies can be manufactured according to the shape of the refractory brick body 1, after the refractory brick body 1 is fired, a firing expansion material is put into blind holes 2 of the refractory brick body 1, and a vacuum insulation panel 3 is put into the blind holes 2; after the refractory brick body 1 is piled into the rotary kiln, the working surface is close to the fired material of the rotary kiln, so that the blind hole 2 and the heat collecting hole 4 are formed in the refractory brick body 1 in the non-working process of the rotary kiln, the manufacturing cost of the refractory brick can be saved, the stress of the refractory brick body 1 can be reduced, the strength of the refractory brick body is improved, and the strength of the whole rotary kiln is improved; in the working process of the rotary kiln, the air inside the rotary kiln is heated by the high temperature generated inside the rotary kiln, and the hot air enters the rotary kiln through the heat collecting holes 4 on the refractory brick body 1, so that on one hand, the phenomenon that the rotary kiln collapses because the local fracture of the working surface of the refractory brick body 1 is caused by overhigh temperature can be prevented; on the other hand, after the hot air enters the heat collecting hole 4, the hot air enters the blind hole 2 along the heat collecting hole 4, so that the fired expansion material in the blind hole 2 expands to push the vacuum heat insulation plate 3 out to the opening of the blind hole 2, and the vacuum heat insulation plate 3 has good heat insulation performance, and the blind hole 2 can be filled after the fired expansion material expands, so that the heat insulation performance of the refractory brick body 1 is improved, and the heat loss in the rotary kiln is reduced; when the vacuum heat insulation plate 3 is pushed out by the sintered expansion material, the arc-shaped plate 5 is pushed out along with the vacuum heat insulation plate 3, and the opening of the blind hole 2 can be sealed by matching with the vacuum heat insulation plate 3, so that the heat insulation property of the refractory brick body 1 is improved; because the arc-shaped plate 5 is filled with the fire clay, when the arc-shaped plate 5 is pushed to the opening of the blind hole 2 and contacts with the L-shaped limiting block 6, the heat-resistant clay in the middle of the arc-shaped plate 5 moves to two sides of the arc-shaped plate 5 because the arc-shaped plate 5 is limited by the L-shaped limiting block 6, the heat-resistant clay on two sides of the arc-shaped plate 5 is increased, the heat-resistant clay in the middle is reduced, and the arc-shaped plate 5 forms a bulge after contacting with the L-shaped limiting block 6, so that the contact area of hot air of the refractory brick body 1 can be reduced by the bulge, and the heat; after the blind hole 2 is polished, the roughness of the blind hole is reduced, so that the vacuum heat insulation plate 3 and the arc-shaped plate 5 can be conveniently pushed out, meanwhile, the content of dust attached to the interior of the blind hole can be reduced, and the situation that the heat insulation performance of the refractory brick body 1 is reduced due to the fact that the pushing out of the vacuum heat insulation plate 3 and the arc-shaped plate 5 is influenced by an excessive dust process is prevented; after the hot air enters the heat collecting holes 4, because the inner diameters of the heat collecting holes 4 from the working surface to the non-working surface of the refractory brick body 1 are sequentially reduced, the pressure of the hot air entering the heat collecting holes 4 is continuously increased, so that the contact speed of the fired expansion material and the hot air can be increased, and the hot air can be rapidly expanded to push out the arc-shaped plate 5 and the vacuum heat-insulating plate 3; when hot air enters the heat collecting holes 4, the fireproof strips 8 in the heat collecting holes 4 can adsorb dust in the hot air after roughening treatment, so that the condition that the heat collecting holes 4 are blocked due to excessive dust brought by the hot air in the heat collecting holes 4 is reduced, and the heat insulation of the whole refractory brick body 1 is influenced.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A refractory brick for a rotary kiln is characterized in that: the fireproof brick comprises a fireproof brick body (1), wherein a group of blind holes (2) are formed in the fireproof brick body (1) in the vertical direction, the blind holes (2) are formed and used for reducing stress of the fireproof brick body (1), the opening of each blind hole (2) is located on the working face of the fireproof brick body (1), one end, far away from the opening, of each blind hole (2) is filled with a firing expansion material, the volume of the firing expansion material is about one half of that of each blind hole (2), and a vacuum insulation board (3) is placed in each blind hole (2); the vacuum heat insulation plate is characterized in that a heat collecting hole (4) is additionally formed in the refractory brick body (1), the heat collecting hole (4) is communicated with the blind hole (2) where the sintering expansion material is placed, hot air enters the heat collecting hole (4) and then the sintering expansion material expands to push the vacuum heat insulation plate (3) out to seal the opening of the blind hole (2).
2. The refractory brick for the rotary kiln as claimed in claim 1, wherein: the vacuum heat insulation plate is characterized in that an arc-shaped plate (5) is fixedly connected to one end, far away from the end where the expansion material is fired, of the vacuum heat insulation plate (3), the arc-shaped plate (5) is made of polycrystalline alumina fibers, the diameter of the arc-shaped plate (5) is larger than the inner diameter of the blind hole (2) by 5-6 mm, and the arc-shaped plate (5) is used for being matched with the vacuum heat insulation plate (3) to.
3. The refractory brick for the rotary kiln as claimed in claim 2, wherein: the arc-shaped plate (5) is of a hollow structure, and fire-resistant clay is filled in the arc-shaped plate; the L-shaped limiting blocks (6) symmetrically arranged are placed at the opening of the blind hole (2), and the arc-shaped plate (5) is protruded after being contacted with the L-shaped limiting blocks (6).
4. The refractory brick for the rotary kiln as claimed in claim 3, wherein: the inner wall of the blind hole (2) needs to be polished to reduce the roughness of the inner wall of the blind hole (2), and the roughness is used for reducing the adsorption of dust in the blind hole (2) and accelerating the pushing speed of the vacuum heat insulation plate (3) and the arc-shaped plate (5).
5. The refractory brick for the rotary kiln as claimed in claim 1, wherein: the section structure of the heat collecting holes (4) is in a step shape, the inner diameters of the heat collecting holes (4) from the working surface to the non-working surface of the refractory brick body (1) are sequentially reduced, and the sequentially reduced heat collecting holes (4) are used for increasing the pressure of hot air entering the interior of the refractory brick body.
6. The refractory brick for the rotary kiln as claimed in claim 5, wherein: the heat collecting device is characterized in that one end of the heat collecting hole (4) close to the working surface is fixedly connected with an inclined rod (6) inside, a wavy fire-resistant strip (7) is arranged on the inclined rod (6), the surface of the fire-resistant strip (7) is subjected to roughening treatment, and the fire-resistant strip (7) is used for adsorbing dust entering from the heat collecting hole (4).
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| CN201910403564.2A CN110207495B (en) | 2019-05-15 | 2019-05-15 | Refractory brick for rotary kiln |
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| CN110207495B true CN110207495B (en) | 2020-11-20 |
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| DE3725069A1 (en) * | 1987-07-29 | 1989-02-09 | Haessler Andreas | Honeycomb fibre lining |
| JP2015057577A (en) * | 2013-08-12 | 2015-03-26 | 三菱樹脂株式会社 | Lining for radiant tube bottom support receiver part |
| CN204730651U (en) * | 2015-05-21 | 2015-10-28 | 靳亲国 | A kind of porous cross structure insulating fire brick |
| CN106187248B (en) * | 2016-07-26 | 2018-09-18 | 济源市耐火炉业有限公司 | A kind of MULTILAYER COMPOSITE runner brick and its production method |
| CN207831931U (en) * | 2017-12-29 | 2018-09-07 | 宜兴摩根热陶瓷有限公司 | A kind of exchangeable lightweight furnace roof brick |
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