CN220062576U - C-type double-chamber kiln inner ring masonry structure - Google Patents
C-type double-chamber kiln inner ring masonry structure Download PDFInfo
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- CN220062576U CN220062576U CN202321532387.6U CN202321532387U CN220062576U CN 220062576 U CN220062576 U CN 220062576U CN 202321532387 U CN202321532387 U CN 202321532387U CN 220062576 U CN220062576 U CN 220062576U
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- 239000011449 brick Substances 0.000 claims abstract description 115
- 239000000835 fiber Substances 0.000 claims abstract description 25
- 238000009413 insulation Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 72
- 238000004873 anchoring Methods 0.000 claims description 22
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 12
- 229910052863 mullite Inorganic materials 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 7
- 229920000742 Cotton Polymers 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010304 firing Methods 0.000 abstract 1
- 238000001354 calcination Methods 0.000 description 5
- 239000004927 clay Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000011094 fiberboard Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 101100491335 Caenorhabditis elegans mat-2 gene Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Abstract
The utility model discloses a C-type double-hearth kiln inner ring masonry structure, which relates to the field of steel manufacturing equipment and comprises two opposite mirror-image semicircular outer C-liners and inner C-liners, wherein the middle channel is arranged, the bottom of each inner C-liner is of a ring beam structure, a fiber felt is paved above the ring beam structure, a heat insulation plate is installed in the direction of a furnace shell, heat insulation bricks and special-shaped refractory bricks are sequentially built, the top end face and the bottom end face of each special-shaped refractory brick are regularly inclined and concave from two sides to the middle, a top surface convex rib is arranged on the top end face of each special-shaped refractory brick, and a bottom surface groove is arranged on the bottom end face of each special-shaped refractory brick; one of the two side surfaces of the special-shaped refractory brick is provided with a side surface convex rib, and the other side surface is provided with a side surface groove; compared with the prior art, the front and back of the special-shaped refractory brick are arranged in the radian structure in the same direction, the sealing of the brick from top to bottom and from left to right is realized by the firing structure, and the problems that the brick joint is enlarged, high-temperature air flows are strung into the heat insulation layer from the kiln and burn the heat insulation layer during expansion are avoided.
Description
Technical Field
The utility model relates to the technical field of steel manufacturing and equipment thereof, in particular to a C-shaped double-hearth kiln inner ring masonry structure.
Background
The double-hearth kiln has the advantages of low energy consumption, excellent product quality and the like, and the common double-hearth kiln comprises two opposite mirrored semicircular hearths with middle channels, wherein the furnace lining of the kiln is called an outer C-lining, the furnace lining of the middle channels is called an inner C-lining, the semicircular inner end straight line of the outer C-lining is connected with the inner C-lining to form a ring brick layer, and 8 vertically-arranged cooling struts are uniformly arranged at the joint of the outer C-lining and the inner C-lining and in a circle of the inner C-lining, and the common double-hearth kiln is generally called a double-C structure. The double-hearth kiln lining structure is divided into a cooling zone, a calcining zone and a preheating zone from bottom to top, and is built by insulating bricks of refractory materials with high temperature resistance, wear resistance and good heat preservation performance, so that a double-C structure, namely a multi-layer horizontal annular brick layer with inner C lining and outer C lining is formed. The outer ring brick layers of the kiln are 194 layers in total from the bottom of the kiln chamber.
The cooling belt and the bottom of the steel structure are leveled by adopting low cement casting materials, and then the cooling belt is built. From 1 to 40 layers, from the steel shell structure outwards, the brick is built by adopting coating materials, two layers of fiber boards, insulating bricks which are horizontally and orderly arranged side by side and high-strength clay bricks in sequence. Wherein the thickness of the fiber board is 30mm, the thickness of the insulating brick is 230mm, and the thickness of the high-strength clay insulating brick is 260mm. When each layer of bricks are built, expansion joints are reserved in the rings of the kiln ring brick layers at certain intervals. From 41 layers to 82 layers, the working temperature is correspondingly increased due to the gradual approach of the kiln height to the calcining zone area, and the brick lining working layer brick is changed into the opposite refractory brick. The middle channel is provided with a fire poking door for observing and cleaning the channel running and dust accumulation conditions in the kiln during kiln stopping, and a setting template is required to be built during masonry. The temperature of the burning zone can reach 1100 ℃, and from the aspects of calcining characteristics and temperature, bricks of the 83 th to 161 th rings of bricks of the outer ring of the kiln are constructed by adopting mullite bricks as the working layer bricks. From the steel shell structure to the outside, the coating, two layers of fiber plates, insulating bricks and mullite bricks are adopted in sequence. And anchoring parts and masonry castable are welded on the bottom of the steel structure at the inner side of the kiln and the strut structure and are used for protecting the steel structure part. Meanwhile, thermocouples are uniformly arranged in the inner ring area and the outer ring area of each kiln chamber for detecting the calcination condition of the kiln. The 162 th layer to the 194 th layer adopt high-strength clay bricks as working layers, and are used as a part of the preheating zone.
The whole kiln structure should be strictly symmetrical, and in order to ensure the construction period, the masonry of two kiln bores can be carried out simultaneously. In the masonry process, overlapping of brick seams of upper and lower adjacent brick layers should be avoided as much as possible, and the mortar should be smeared with sufficient quantity and uniformity.
The method comprises the steps of (1) building a double-hearth kiln calcined strip steel structure inner ring refractory brick structure, wherein an annular beam structure consisting of anchoring pieces and casting materials is built at the bottom of the inner ring steel structure, welding by adopting anchoring hooks from the outer surface of the kiln body to the center of the kiln on the annular beam structure, uniformly smearing by using paint, plugging by using a 2-layer thick common aluminum fiber board, building by using 2-layer light clay insulating bricks, and finally building by using special-shaped refractory bricks for the area of a calcined strip working layer for kiln calcination. The special-shaped refractory brick adopts a refractory brick with a structure shown in fig. 2 and 3, an upward protruding boss is arranged in the middle of the top end of the refractory brick, an inward concave table-shaped notch corresponding to the boss is arranged in the middle of the bottom end of the refractory brick, the boss is inserted into the table-shaped notch during masonry to form locking in the vertical direction, when the refractory brick is calcined at high temperature, the kiln inner ring is expanded, the special-shaped brick is expanded by heating and moves left and right, the brick joint is enlarged, hot air in the kiln flows into an insulating layer with lower refractoriness from the brick joint part, and the insulating brick and coating are burnt, so that the masonry structure is transformed to overcome the burning loss of the insulating brick at the inner ring part caused by high-temperature air flow in the kiln.
Disclosure of Invention
The utility model aims to solve the problem of providing a C-shaped double-hearth kiln inner ring masonry structure so as to solve the problem that a brick joint is enlarged and a heat-insulating brick at the inner ring part is burnt by high-temperature air flow in a kiln due to the fact that a double-hearth kiln refractory material is heated and expanded.
In order to solve the problems, the technical scheme of the utility model is as follows: the inner ring masonry structure of the C-type double-hearth kiln comprises two opposite mirror-image semicircular outer C-liners and inner C-liners, wherein the middle channel is arranged, the semicircular two ends of each outer C-liner are connected with each inner C-liner in a straight line to form a ring brick layer, the inner C-liner part is a ring beam structure formed by combining anchoring parts and mullite castable, a fiber felt is paved above the ring beam structure, a heat insulation plate is installed in the direction of a furnace shell, heat insulation bricks and special-shaped refractory bricks are sequentially built, the top end face and the bottom end face of each special-shaped refractory brick are regularly inclined and concave from two sides to the middle, the upper middle part of the top end face of each special-shaped refractory brick is provided with an upward-protruding top surface convex rib along the length direction, and a bottom surface groove which is concave into the brick is arranged at the position corresponding to the top surface convex rib on the bottom end face of each special-shaped refractory brick; the middle part of one of the two side surfaces of the special-shaped refractory brick is provided with a side convex rib which protrudes outwards, and the other side surface of the special-shaped refractory brick is provided with a side groove which is concave inwards; the front surface and the back surface of the special-shaped refractory brick are arranged in an arc structure in the same direction, and the arc section of the back surface is shorter than that of the front surface.
Among the above technical schemes, more specific schemes may be: the top surface convex rib is connected with the adjacent end of the side surface convex rib, and the bottom surface groove is communicated with the adjacent end of the side surface groove.
Further: and building two templates at least at intervals between the special-shaped refractory brick layers along the arc length direction of the inner C lining inner ring, wherein each template comprises an anchoring piece with one end welded on a furnace shell steel plate, the other end of each anchoring piece stretches inwards, and mullite castable is cast on each anchoring piece to form a casting layer.
Further: and paving a fiber cotton layer on the surface layer between the template and the adjacent special-shaped refractory brick layer.
Further: the height of the template is 2m-3m, and a fiber felt is paved between the upper layer and the lower layer of each brick segment layer, and the thickness of the fiber felt is 10mm; and a fiber felt is paved between the upper layer and the lower layer of each template, and the thickness of the fiber felt is 10mm.
Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:
the front and the back of the special-shaped refractory brick are arranged in an arc structure, so that the special-shaped refractory brick can be well attached to the arc structure of the inner ring of the double-chamber kiln, the top and the bottom of the special-shaped refractory brick are provided with corresponding top convex ribs and bottom grooves, and the side is provided with corresponding side convex ribs and side grooves, so that the sealing of the brick up, down, left and right is realized, and the problems that the brick joints are enlarged, high-temperature air flows are strung into the heat insulation layer from the kiln during expansion, and the heat insulation layer is burnt are avoided.
Drawings
FIG. 1 is a layer structure diagram of a prior art C-type double-hearth kiln inner ring masonry refractory structure;
FIG. 2 is a front view of a prior art profiled refractory block;
FIG. 3 is a bottom view of FIG. 2;
FIG. 4 is a top view of the inner ring structure of a C-type double-chamber kiln according to an embodiment of the utility model;
FIG. 5 is a side view of a template portion of an embodiment of the present utility model;
FIG. 6 is a block diagram of a side view of a double chamber kiln according to an embodiment of the utility model;
FIG. 7 is a front view of a profiled refractory block of the present utility model;
FIG. 8 is a left side view of FIG. 7;
FIG. 9 is a top view of FIG. 7;
fig. 10 is a bottom view of fig. 7.
Description of sequence number:
the ring beam structure 1, the fiber mat 2, the heat insulation board 3, the heat insulation brick 4, the special-shaped refractory brick 5, the top surface convex rib 5-1, the bottom surface groove 5-2, the side surface convex rib 5-3, the side surface groove 5-4, the template 6, the anchoring piece 7, the fiber cotton layer 8 and the anchoring piece 9.
Detailed Description
Embodiments of the utility model are described in further detail below with reference to the attached drawing figures:
the C-type double-hearth kiln inner ring masonry structure shown in fig. 4 and 5 comprises two opposite mirror-image semicircular outer C-liners and inner C-liners, wherein a middle channel is arranged between the two opposite mirror-image semicircular outer C-liners and the inner C-liners, two semicircular ends of each outer C-liner are connected with each other in a straight line mode to form a ring brick layer, the bottom of each inner C-liner B is a ring beam structure 1 formed by combining anchoring pieces 7 and mullite castable, a fiber felt 2 is paved above the ring beam structure, a heat insulation plate 3 is installed in the direction of a furnace shell, and two layers of heat insulation bricks 4 and special-shaped refractory bricks 5 are sequentially built; as shown in fig. 7-10, the top end face and the bottom end face of the special-shaped refractory brick 5 are both obliquely recessed in a manner that both sides face the middle part, the middle part on the top end face is provided with a top surface convex rib 5-1 protruding upwards along the length direction, and the bottom end face is provided with a bottom surface groove 5-2 recessed into the brick at a position corresponding to the top surface convex rib; the middle part of one of the two side surfaces of the special-shaped refractory brick 5 is provided with a side convex rib 5-3 which protrudes outwards, the other side surface of the special-shaped refractory brick 5 is provided with a side groove 5-4 which is concave towards the inside of the brick at the position corresponding to the side convex rib 5-3, so that the sealing of the special-shaped refractory brick 5 from top to bottom, left to right is realized, the brick joint caused during expansion is prevented from becoming large, high-temperature air flows are strung into the heat insulation layer from the kiln, and the heat insulation layer is burnt; the front and the back of the special-shaped refractory brick 5 are arranged in the same-direction radian structure, and the arc section of the back is shorter than that of the front, so that the special-shaped refractory brick 5 can be well attached to the radian structure of the inner ring of the double-hearth kiln; the top surface convex rib 5-1 is connected with the adjacent end of the side surface convex rib 5-3, and the bottom surface groove 5-2 is communicated with the adjacent end of the side surface groove 5-4; as shown in fig. 6, at least two templates 6 are constructed at intervals between the layers of the special-shaped refractory bricks 5 along the arc length direction of the inner ring of the inner C lining, each template comprises an anchoring piece 7 with one end welded on a steel plate of the furnace shell, the other end of each anchoring piece stretches inwards, mullite casting materials are cast on the anchoring piece to form a casting layer, and a fiber cotton layer 8 is paved on the surface layer between the templates 6 and the adjacent layers of the special-shaped refractory bricks 5; the height of the template 6 is 2m-3m equal to that of the brick segment layers of the special-shaped refractory bricks 5, a fiber felt 2 is paved between the upper layer and the lower layer of each brick segment layer, and the thickness of the fiber felt is 10mm; and a fiber felt 2 is paved between the upper layer and the lower layer of each template, and the thickness of the fiber felt is 10mm.
The method for building the inner ring of the C-shaped double-chamber kiln comprises the following steps of:
A. welding anchoring parts at the bottom of the annular steel structure in the double-hearth kiln, casting by using mullite castable in sections, and building the castable at the bottom of the double-hearth kiln in a mode of combining the anchoring parts and the mullite castable to form an annular beam structure;
B. laying a 10mm thick fiber felt above the ring beam structure, building a template on the inner ring structure at intervals, wherein the template comprises an anchoring piece with one end welded on a furnace shell steel plate, the other end of the anchoring piece extends inwards, mullite castable is poured on the anchoring piece, a heat insulation plate is mounted along the furnace shell direction, and two layers of heat insulation bricks are sequentially built;
C. building special-shaped refractory bricks on two sides of a template along the arc length direction of the inner ring, adhering one side of the insulating brick, enabling a bottom surface groove of the bottom end surface of the special-shaped refractory brick on the upper layer to be buckled on a top surface convex rib of the top end surface of the special-shaped refractory brick on the lower layer, enabling the special-shaped refractory brick on the upper layer to be staggered and buckled with the special-shaped refractory brick on the lower layer, enabling a side surface convex rib of the special-shaped refractory brick on the left side to be inserted into a side surface groove of the special-shaped refractory brick on the right side, and the like;
D. a layer of fiber cotton is paved on the surface layer between the adjacent layers of the template and the special-shaped refractory bricks, so that the expansion of castable and refractory bricks is eliminated, the special-shaped refractory bricks and the template are subjected to grouting pouring by using mullite castable, the castable is fully filled between the brick layers, and the sealing between brick joints can be better realized by combining the castable with the special-shaped refractory bricks, so that the service life of the refractory bricks of the heat preservation layer is prolonged;
E. leveling the brick layer after the brick layer is hardened, and paving a layer of 10mm thick fiber mat;
F. and (5) repeating the masonry according to the step B-E.
Claims (5)
1. The utility model provides a C type double-chamber kiln inner ring masonry structure, is including being equipped with the semicircular outer C lining and the interior C lining of two relative mirror images of intermediate channel, the semicircle both ends straight line of outer C lining with interior C lining is connected, forms ring brick layer, its characterized in that: the inner C-shaped lining bottom is of a ring beam structure formed by combining anchoring pieces and mullite castable, a fiber felt is paved above the ring beam structure, a heat insulation plate is installed along the direction of a furnace shell, then a heat insulation brick and a special-shaped refractory brick are sequentially built, the top end face and the bottom end face of the special-shaped refractory brick are regularly inclined and concave towards the middle part from both sides, the upper middle part of the top end face of the special-shaped refractory brick is provided with an upward convex top surface convex rib along the length direction, and a bottom surface groove which is concave towards the inside of the brick is arranged at the position corresponding to the top surface convex rib on the bottom end face of the special-shaped refractory brick; the middle part of one of the two side surfaces of the special-shaped refractory brick is provided with a side convex rib which protrudes outwards, and the other side surface of the special-shaped refractory brick is provided with a side groove which is concave inwards; the front surface and the back surface of the special-shaped refractory brick are arranged in an arc structure in the same direction, and the arc section of the back surface is shorter than that of the front surface.
2. The C-type double-chamber kiln inner ring masonry structure according to claim 1, wherein: the top surface convex rib is connected with the adjacent end of the side surface convex rib, and the bottom surface groove is communicated with the adjacent end of the side surface groove.
3. A C-type double-chamber kiln inner ring masonry structure according to claim 1 or 2, characterized by: and building two templates at least at intervals between the special-shaped refractory brick layers along the arc length direction of the inner C lining inner ring, wherein each template comprises an anchoring piece with one end welded on a furnace shell steel plate, the other end of each anchoring piece stretches inwards, and mullite castable is cast on each anchoring piece to form a casting layer.
4. A C-type double-chamber kiln inner ring masonry structure according to claim 3, wherein: and paving a fiber cotton layer on the surface layer between the template and the adjacent special-shaped refractory brick layer.
5. A C-type double-chamber kiln inner ring masonry structure according to claim 3, wherein: the height of the template is 2m-3m, and a fiber felt is paved between the upper layer and the lower layer of each brick segment layer, and the thickness of the fiber felt is 10mm; and a fiber felt is paved between the upper layer and the lower layer of each template, and the thickness of the fiber felt is 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321532387.6U CN220062576U (en) | 2023-06-15 | 2023-06-15 | C-type double-chamber kiln inner ring masonry structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321532387.6U CN220062576U (en) | 2023-06-15 | 2023-06-15 | C-type double-chamber kiln inner ring masonry structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220062576U true CN220062576U (en) | 2023-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321532387.6U Active CN220062576U (en) | 2023-06-15 | 2023-06-15 | C-type double-chamber kiln inner ring masonry structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220062576U (en) |
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2023
- 2023-06-15 CN CN202321532387.6U patent/CN220062576U/en active Active
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