CN114279222A - Building method of vault structure of high-temperature shuttle kiln - Google Patents
Building method of vault structure of high-temperature shuttle kiln Download PDFInfo
- Publication number
- CN114279222A CN114279222A CN202210019102.2A CN202210019102A CN114279222A CN 114279222 A CN114279222 A CN 114279222A CN 202210019102 A CN202210019102 A CN 202210019102A CN 114279222 A CN114279222 A CN 114279222A
- Authority
- CN
- China
- Prior art keywords
- brick
- arch
- center
- vault
- arch crown
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention belongs to the field of building of shuttle kilns, and relates to a vault center brick of a high-temperature shuttle kiln vault structure and a building method, which is a heavy brick and replaces a traditional alumina hollow ball brick; the arch crown center longitudinal dry joint belt is positioned on one side of the center arch crown brick and is arranged between the center arch crown brick and the adjacent arch crown brick on one side; the base is connected with the arch top brick and the steel shells at two ends of the side wall of the kiln body; according to the invention, the heavy brick is adopted to replace an alumina bubble brick, so that the high-temperature performance is greatly improved, the compression resistance and tensile strength of the arch crown center brick are greatly improved, and the arch crown center brick is reduced from being broken under the action of stress; the vault structure is directly built by adopting the vault center dry seam belt, the base and the steel shell, and the problems of vault center brick fracture and vault overall sinking can be solved simultaneously. By adopting the technology of the invention, the service life of the shuttle kiln is greatly prolonged, the vault begins to break and fall off after the previous 50 times of kiln firing, and obvious broken bricks do not appear after the current 150 times of kiln operation.
Description
Technical Field
The invention belongs to the field of building of shuttle kilns, and particularly relates to a building method of a vault structure of a high-temperature shuttle kiln.
Background
The shuttle kiln as an intermittent kiln has the characteristics of flexible production, convenient operation and the like, and is widely applied; the highest service temperature of the shuttle kiln can reach 1650-1750 ℃, the arch top bricks are heated to expand towards two ends of the side wall of the kiln body when the temperature is raised, the arch top central bricks can bear the extrusion from the arch top bricks at the left side and the right side to form extrusion stress, and the central bricks are jacked up to enter the upper heat-insulating layer; when the kiln is stopped and the temperature is reduced, the arch-top bricks shrink towards the two ends of the kiln body, the arch-top central bricks fall under the gravity, and simultaneously, the arch-top central bricks are drawn by the arch-top bricks at the left and right sides to form tensile stress; the intermittent operation of the shuttle kiln is frequent, the arch crown central brick is in a state of expansion with heat and contraction with cold for a long time, the compression stress and the tensile stress are repeatedly acted, the central brick is repeatedly jacked up and falls down, the stress is accumulated to a certain degree, cracks are generated until the arch crown brick is broken, and the arch crown brick falls off, so the arch crown central brick has higher compression resistance and tensile resistance; at present, the vault is built by the alumina hollow ball bricks generally, the vault has the effects of light weight and high strength, but the alumina hollow ball bricks in the central part cannot meet the requirements, the phenomenon of fracture and shedding is easy to occur, and the service life of the kiln is shortened.
Another problem with the intermittent operation of the shuttle kiln is that the vault sinks as a whole; the middle of a traditional base and steel shells on two sides of a kiln body are provided with heat preservation layers, and heat preservation fiber felts or fiber blankets with certain thicknesses are filled in the traditional base and the steel shells on the two sides of the kiln body; the base can't get back to the primary position, when the kiln is stopped and the temperature is reduced, when the kiln heaies up once more, the hunch crown brick expands once more, the base is further expanded, the further grow of arch center angle, the vault height continues to descend, accumulates to a certain extent after, causes the vault to wholly sink, finally leads to the hunch crown brick to drop because of gravity.
Disclosure of Invention
The invention aims to provide a building method of a vault structure of a high-temperature shuttle kiln, which solves the problems of breaking of a vault center brick and falling of the whole vault, and prolongs the service life of the kiln.
The invention adopts the following technical scheme for achieving the purpose:
a high-temperature shuttle kiln vault structure masonry method, the high-temperature shuttle kiln vault structure has heavy bricks as the central brick of vault; the heavy brick is a wedge-shaped brick, the wedge-shaped brick is of a wedge-shaped structure with a larger upper end and a smaller lower end, and the thickness difference between the larger end and the smaller end is not less than 10 mm; a vault center longitudinal dry seam belt is built between the center arch top brick and the adjacent arch top brick on one side; the central longitudinal dry seam belt of the vault is a fireless mud dry seam belt arranged along the length direction of the kiln arch; when the arch crown center longitudinal dry seam belt is built, the larger end of the arch crown center brick in the transverse direction of the arch crown is arranged above, the smaller end of the arch crown center brick is arranged below, fire clay is smeared between one side in the width direction and the adjacent arch crown brick, and the two bricks are connected together through wet building; the other side of the arch crown central brick in the width direction is not coated with fire clay, and the larger end of the arch crown central brick is connected with the larger end of the adjacent arch crown brick to lock the large ends of the two bricks, so that the bricks are prevented from falling off due to the influence of gravity; a gap is reserved between the lower parts of the two bricks, the width of the gap is 1-2 mm, and a longitudinally-penetrating dry seam belt is formed in the center of the arch top; and a base is directly built on the steel shell at the two ends of the side wall of the kiln body, and the base is connected with the arch-top brick.
The heavy brick is one of corundum mullite brick, zirconium corundum brick, chromium corundum brick or corundum brick.
Al in the heavy brick2O3Not less than 80% and not less than 2.9kg/cm3Compressive strength at 110 ℃ for 16h≧100MPa。
The width of heavy brick is 170 ~ 200mm, and the height is 300 ~ 350 mm.
The masonry method of the vault structure of the high-temperature shuttle kiln, which is provided by the invention, has the following beneficial effects by adopting the technical scheme:
1. the vault center brick adopts heavy bricks to replace alumina bubble bricks, and the body density is improved to 2.9kg/cm3The normal-temperature compressive strength is improved from 10MPa to more than 100MPa, the high-temperature performance is greatly improved, the compressive and tensile capacities of the arch crown center brick are greatly improved, and the arch crown center brick is reduced from being broken due to stress;
2. the vault structure is directly built by adopting the vault center dry seam belt, the base and the steel shell, and the problems of vault center brick fracture and vault overall sinking are solved simultaneously; the specific analysis is as follows:
1) because the base and the steel shell are directly built together, the middle of the base is not provided with a heat insulation layer, the base is fixed, when the kiln body is heated, the arch top bricks cannot expand towards the two ends of the base and only expand towards the center of the arch top, the base is fixed without displacement, the arch center angle is ensured not to change, the height of the arch top is kept unchanged, and the problem of integral sinking of the arch top is well solved;
2) a 1-2 mm longitudinal dry seam belt is reserved in the center of the vault, so that a partial expansion space is provided for the vault bricks, the extrusion stress is buffered, and the probability that the vault center bricks are extruded and jacked into the upper heat-insulating layer is reduced;
3) when the kiln is stopped and the temperature is reduced, the side of the arch crown center brick without the fire clay is not drawn by the adjacent arch crown bricks, so that the arch crown center brick is prevented from being broken due to drawing stress;
3. the invention greatly prolongs the service life of the shuttle kiln, the vault begins to break and fall off after the previous 50 times of kiln firing, and obvious broken bricks do not appear after the current 150 times of kiln operation.
Drawings
FIG. 1 is a schematic diagram of the structure of a vault of a shuttle kiln.
In the figure, 1, a vault center brick, 2, a vault center longitudinal dry seam belt, 3 and a base.
Detailed Description
The invention is further described below with reference to the accompanying drawings;
example 1:
as shown in FIG. 1, the present invention comprises a center brick of a dome 1 corundum mullite brick, Al2O385% or more, 11 or less of SiO2, and 3.0kg/cm or more of bulk density3The compressive strength is more than or equal to 130MPa at 110 ℃ for 16 h; the brick size is 345X 172X 85/75;
the building method of the arch crown center longitudinal dry seam belt 2 comprises the following steps: the arch crown brick is an alumina hollow ball brick, the arch crown center brick is a corundum mullite brick, the big end is arranged above, the small end is arranged below, fire clay is smeared between one side in the width direction and the adjacent alumina hollow ball brick, and the two bricks are connected together by wet masonry; the other side of the corundum-mullite brick in the width direction is not coated with fire clay, and the big end of the corundum-mullite brick is connected with the larger end of the adjacent alumina hollow ball brick to lock the big ends of the two bricks, so that the corundum-mullite brick is prevented from falling off due to the influence of gravity; a gap is reserved between the lower parts of the two bricks, the width of the gap is about 2mm, and a longitudinally-penetrating dry seam belt is formed in the center of the arch top;
one side of the base 3 is connected with the steel shell at the two ends of the side wall of the kiln body and is directly built on the steel shell, and the other side of the base is connected with the arch top brick.
The use effect is as follows: after 150 kiln times, no obvious broken bricks appear.
Example 2:
as shown in figure 1, the present invention comprises a vault center brick 1 of chrome corundum brick, Al2O382% or more, 5% or more of Cr2O3, and 3.05kg/cm of bulk density3The compressive strength is not less than 110MPa at 110 ℃ for 16 h; the brick size is 345X 114X 76/65;
the building method of the arch crown center longitudinal dry seam belt 2 comprises the following steps: the arch crown brick is an alumina bubble brick, the center brick of the arch crown is a chromium corundum brick, the big end is arranged above, the small end is arranged below, fire clay is smeared between one side in the width direction and the adjacent alumina bubble brick, and the two bricks are connected together by wet masonry; the other side of the corundum-mullite brick in the width direction is not coated with fire clay, and the big end of the corundum-mullite brick is connected with the larger end of the adjacent alumina hollow ball brick to lock the big ends of the two bricks, so that the corundum-mullite brick is prevented from falling off due to the influence of gravity; a gap is reserved between the lower parts of the two bricks, the width of the gap is about 1.5mm, and a longitudinally penetrating dry seam belt is formed in the center of the arch top;
one side of the base 3 is connected with the steel shell at the two ends of the side wall of the kiln body and is directly built on the steel shell, and the other side of the base is connected with the arch top brick.
The use effect is as follows: no significant brick breakage occurred after 153 kilns were used.
Example 3:
as shown in FIG. 1, the present invention comprises a vault center brick 1 zircon corundum brick, Al2O385% or more, 8% or more of ZrO2, and 2.95kg/cm of bulk density3The compressive strength is not less than 120MPa at 110 ℃ for 16 h; the brick size is 345X 172X 85/75;
the building method of the arch crown center longitudinal dry seam belt 2 comprises the following steps: the arch crown brick is an alumina hollow ball brick, the arch crown center brick is a zirconia-corundum brick, the big end is arranged above, the small end is arranged below, fire clay is smeared between one side in the width direction and the adjacent alumina hollow ball brick, and the two bricks are connected together by wet masonry; the other side of the corundum-mullite brick in the width direction is not coated with fire clay, and the big end of the corundum-mullite brick is connected with the larger end of the adjacent alumina hollow ball brick to lock the big ends of the two bricks, so that the corundum-mullite brick is prevented from falling off due to the influence of gravity; a gap is reserved between the lower parts of the two bricks, the width of the gap is about 2mm, and a longitudinally-penetrating dry seam belt is formed in the center of the arch top;
one side of the base 3 is connected with the steel shell at the two ends of the side wall of the kiln body and is directly built on the steel shell, and the other side of the base is connected with the arch top brick.
The use effect is as follows: after 155 times of kiln usage, no obvious broken bricks appear.
Claims (4)
1. A building method of a vault structure of a high-temperature shuttle kiln is characterized by comprising the following steps: the high-temperature shuttle kiln arch crown structure is provided with heavy bricks serving as arch crown center bricks; the heavy brick is a wedge-shaped brick, the wedge-shaped brick is of a wedge-shaped structure with a larger upper end and a smaller lower end, and the thickness difference between the larger end and the smaller end is not less than 10 mm; a vault center longitudinal dry seam belt is built between the center arch top brick and the adjacent arch top brick on one side; the central longitudinal dry seam belt of the vault is a fireless mud dry seam belt arranged along the length direction of the kiln arch; when the arch crown center longitudinal dry seam belt is built, the larger end of the arch crown center brick in the transverse direction of the arch crown is arranged above, the smaller end of the arch crown center brick is arranged below, fire clay is smeared between one side in the width direction and the adjacent arch crown brick, and the two bricks are connected together through wet building; the other side of the arch crown central brick in the width direction is not coated with fire clay, and the larger end of the arch crown central brick is connected with the larger end of the adjacent arch crown brick to lock the large ends of the two bricks, so that the bricks are prevented from falling off due to the influence of gravity; a gap is reserved between the lower parts of the two bricks, the width of the gap is 1-2 mm, and a longitudinally-penetrating dry seam belt is formed in the center of the arch top; and a base is directly built on the steel shell at the two ends of the side wall of the kiln body, and the base is connected with the arch-top brick.
2. A method of constructing a high temperature shuttle kiln dome structure according to claim 1, wherein: the heavy brick is one of corundum mullite brick, zirconium corundum brick, chromium corundum brick or corundum brick.
3. A method of constructing a high temperature shuttle kiln dome structure according to claim 1, wherein: al in the heavy brick2O3Not less than 80% and not less than 2.9kg/cm3The compressive strength is ≧ 100MPa at 110 ℃ for 16 h.
4. A method of constructing a high temperature shuttle kiln dome structure according to claim 1, wherein: the width of heavy brick is 170 ~ 200mm, and the height is 300 ~ 350 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210019102.2A CN114279222A (en) | 2022-01-10 | 2022-01-10 | Building method of vault structure of high-temperature shuttle kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210019102.2A CN114279222A (en) | 2022-01-10 | 2022-01-10 | Building method of vault structure of high-temperature shuttle kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114279222A true CN114279222A (en) | 2022-04-05 |
Family
ID=80880614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210019102.2A Pending CN114279222A (en) | 2022-01-10 | 2022-01-10 | Building method of vault structure of high-temperature shuttle kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114279222A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115353896A (en) * | 2022-08-23 | 2022-11-18 | 五冶集团上海有限公司 | Method for controlling flatness of vault of heat recovery combustion chamber |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190011798A (en) * | 1900-06-29 | 1900-08-25 | Eduard Boettger | New and Useful Improvement in Building Arches with New Bricks. |
| CN2215668Y (en) * | 1994-11-25 | 1995-12-20 | 冶金工业部建筑研究总院 | Arc shape furnace top with turnable joint |
| JPH11287565A (en) * | 1998-03-31 | 1999-10-19 | Asahi Glass Co Ltd | Refractory brick |
| CN206496652U (en) * | 2017-01-25 | 2017-09-15 | 江苏宝石耐热科技发展有限公司 | A kind of key brick of domeshape industrial high temperature stove |
-
2022
- 2022-01-10 CN CN202210019102.2A patent/CN114279222A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190011798A (en) * | 1900-06-29 | 1900-08-25 | Eduard Boettger | New and Useful Improvement in Building Arches with New Bricks. |
| CN2215668Y (en) * | 1994-11-25 | 1995-12-20 | 冶金工业部建筑研究总院 | Arc shape furnace top with turnable joint |
| JPH11287565A (en) * | 1998-03-31 | 1999-10-19 | Asahi Glass Co Ltd | Refractory brick |
| CN206496652U (en) * | 2017-01-25 | 2017-09-15 | 江苏宝石耐热科技发展有限公司 | A kind of key brick of domeshape industrial high temperature stove |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115353896A (en) * | 2022-08-23 | 2022-11-18 | 五冶集团上海有限公司 | Method for controlling flatness of vault of heat recovery combustion chamber |
| CN115353896B (en) * | 2022-08-23 | 2024-04-05 | 五冶集团上海有限公司 | Heat recovery combustion chamber vault flatness control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102191066B (en) | Coke dry quenching slope air course supporting brick overhaul construction process | |
| CN114279222A (en) | Building method of vault structure of high-temperature shuttle kiln | |
| CN102241995B (en) | Dry quenching expansion joint firebrick structure construction technology | |
| CN106812240B (en) | Bridge-cut-off type self-insulation concrete block and manufacturing process thereof | |
| CN205279716U (en) | Plain rotary kiln lining that calcines of charcoal is with prefabricated brick | |
| CN208671682U (en) | A kind of refractory brick of breakage-proof crack resistence | |
| CN202182612U (en) | Lining structure of vertical lime pit | |
| CN206666139U (en) | New Ai Qixun graphitizing furnaces burner | |
| CN202329157U (en) | Low-heat-conduction fire brick for rotary kiln | |
| CN201317993Y (en) | Z-shaped concrete hollow block with functions of thermal and sound insulation and shock resistance | |
| CN202329156U (en) | Low-heat-conducting refractory brick for combined rotary kiln | |
| CN207095298U (en) | A kind of inner lining structure of fire-proof | |
| CN210506044U (en) | Novel regenerator grate arch T-shaped brick | |
| CN214950534U (en) | Novel energy-saving rotary kiln | |
| CN206073716U (en) | Kiln mouth upper limb wall combination brick structure | |
| CN102767954B (en) | High-temperature box type electric furnace lining precast body and precasting method thereof | |
| CN212390832U (en) | Novel high temperature kiln car platform refractory lining structure | |
| CN217782556U (en) | Insulation block with insulation structure | |
| CN204824765U (en) | Durable coal gasification stove oven keeps warm | |
| CN201031450Y (en) | Concrete small-sized hollow building block | |
| CN2892859Y (en) | Mechanical coke side oven head structure for coke oven combustion chamber-carbonization chamber unit | |
| CN217330707U (en) | Long service life's cement kiln cooler is with sintering multiphase brick | |
| CN219454786U (en) | Solid energy storage body structure | |
| CN215211837U (en) | Heat-insulating corundum-mullite brick | |
| CN212431764U (en) | Refractory composite clay brick for blast furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |