CN202083213U - Anti-falling structure for refractory material of rotary kiln - Google Patents
Anti-falling structure for refractory material of rotary kiln Download PDFInfo
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- CN202083213U CN202083213U CN2011201496824U CN201120149682U CN202083213U CN 202083213 U CN202083213 U CN 202083213U CN 2011201496824 U CN2011201496824 U CN 2011201496824U CN 201120149682 U CN201120149682 U CN 201120149682U CN 202083213 U CN202083213 U CN 202083213U
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- refractory material
- rotary kiln
- kiln
- preformed bricks
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Abstract
The utility model relates to the technical field of chain grating machine rotary kilns, in particular to an anti-falling structure for a refractory material of a rotary kiln. The anti-falling structure comprises a ring-shaped refractory protective layer, wherein the ring-shaped refractory protective layer consists of precast brick zones arranged in the axial direction of the rotary kiln, cast zones staggered with the precast brick zones, kiln body anchor nails and light insulating bricks; both the kiln head side and the kiln tail side on the inner surface of the ring-shaped refractory protective layer are low-temperature spaces; and the middle part is a high-temperature space. The anti-falling structure is characterized in that two layers of asphalt are applied to the surfaces of the kiln body anchor nails; fiber paper is arranged in the working space at the peripheries of precast bricks in the precast brick zone; expansion joints are formed in the working spaces of the cast zones at every 1-2 cm; expansion plates are arranged in and matched with the expansion joints; and the expansion plates are corrugated expansion plates. The anti-falling structure provided by the utility model eliminates thermal stress caused by inconsistent expansion between the refractory material and a steel structure, and prevents the refractory material from falling off.
Description
Technical field
The utility model relates to chain grate machine rotary kiln technical field, particularly a kind of anti-drop structure of rotary kiln refractory material.
Background technology
Service life at the refractory material of China's chain grate machine rotary kiln is very short, shows as mainly that refractory surface can peel off gradually under the condition of high temperature, finally exposes kiln body steel plate, causes and can't produce.Because the special construction of rotary kiln, refractory material axially is provided with along rotary kiln, and the preformed bricks band of being made up of one group of preformed bricks, the casting of watering that is crisscross arranged of preformed bricks band is formed therewith, water and be provided with kiln body anchor studs in the casting, China does not all consider to reserve the problem of dilatation joint in rotary kiln refractory material design and construction process.
Because rotary kiln is a tube structure, refractory material expansion radially can be heated by the cylindrical shell steel plate of rotary kiln outwards to expand and be eliminated in theory, and the steel plate of the axial expansion of refractory material by length direction expands and eliminate.But, in fact steel plate expanded by heating amount radially will be lower than refractory material high temperature swell increment, this will produce because the thermal stress that expands and cause at the refractory material working lining, when the intensity of refractory material itself can't overcome this thermal stress, will produce mutual extruding force between the adjacent refractory material, the working lining of refractory material will produce the phenomenon of peeling off; Because the Temperature Distribution of rotary kiln is that high two ends, middle part are low, this will cause the swell increment of the refractory material swell increment of high-temperature area greater than steel plate, thereby producing shearing force in the radial direction, and refractory material is being produced destruction, the flimsy main cause of high temperature section refractory material that Here it is.How effectively eliminating the refractory material swell increment is the key that improves the service life of rotary kiln refractory material.
Summary of the invention
The utility model provides a kind of anti-drop structure that prolongs the rotary kiln refractory material in rotary kiln refractory material service life.
The purpose of this utility model realizes by following technical proposals:
The anti-drop structure of rotary kiln refractory material of the present utility model; comprise the preformed bricks band that axially is provided with by along rotary kiln; the preformed bricks band is crisscross arranged therewith waters casting; the annular refractory material protective layer that kiln body anchor studs and lightweight thermal insulation brick are formed; the inner surface kiln hood side of this annular refractory material protective layer and kiln tail side are low-temperature space; the centre is the high-temperature region; described preformed bricks band is built by laying bricks or stones by preformed bricks and is formed; described preformed bricks is nonclient area with watering casting near kiln body anchor studs side; in the face of the rotary kiln inboard is the workspace; it is characterized in that the workspace around the preformed bricks of described preformed bricks band is equipped with fibrous paper; at the described every interval 1～2m in workspace that waters casting a dilatation joint is set; in this dilatation joint, be provided with expansion oplate; this expansion oplate and described dilatation joint are complementary, and smear two layers of pitch on the surface of described kiln body anchor studs.
The height of described fibrous paper is 100～120mm, and thickness is 1～2mm.
Described expansion oplate is the ripple expansion oplate, and it highly is 100～120mm, and thickness is 4～6mm.
Every interval 1m is provided with a dilatation joint in the workspace of watering casting of described high-temperature region, and every interval 1.5m is provided with a dilatation joint in the workspace of watering casting of described low-temperature space.
The characteristics of the method that the rotary kiln refractory material comes off that prevent of the present utility model are:
Refractory material expansion radially can be heated by the cylindrical shell steel plate of rotary kiln outwards to expand and be eliminated in theory, and the steel plate of the axial expansion of refractory material by length direction expands and eliminate.But, in fact steel plate expanded by heating amount radially will be lower than refractory material high temperature swell increment, this will produce at the inner surface of annular refractory material protective layer because the thermal stress that expands and cause, when the intensity of refractory material itself can't overcome thermal stress, will produce mutual extruding force between the adjacent refractory material, the inner surface of annular refractory material protective layer will produce the phenomenon of peeling off; Because the Temperature Distribution of rotary kiln is that high two ends, middle part are low, this will cause the swell increment of the refractory material swell increment of high-temperature area greater than steel plate, thereby is producing the destruction that shearing force produces refractory material in the radial direction.The utility model is at the high-temperature area of the inner surface of annular refractory material protective layer; swell increment according to refractory material is provided with expansion oplate; by the workspace (high-temperature area) around preformed bricks fibrous paper is set; every a segment distance dilatation joint is set at the workspace of building band (high-temperature area); this distance will be decided according to working temperature, and these dilatation joints do not connect.And in this dilatation joint, fill expansion oplate, this expansion oplate and fibrous paper are melted under the condition of high temperature or are burnt, and so just stay the slit, for the expansion leaving space of refractory material under the condition of high temperature, promptly eliminate thermal stress.
The utility model has the advantages that:
1) can effectively eliminate the thermal stress of inconsistent generation, prevent that the rotary kiln refractory material from coming off, guarantee the ordinary production of rotary kiln because refractory material and steel construction expand;
2) because dilatation joint does not run through whole refractory material protective layer, can not penetrate into steel plate along dilatation joint and cause " hot spot ", also can not corrode the lightweight thermal insulation brick of close kiln body steel plate owing to string wind because of high-temperature flue gas;
3) prolong service life of refractory material protective layer, reduced production cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
Below in conjunction with the description of drawings specific embodiment of the present utility model.
As shown in Figure 1, the anti-drop structure of rotary kiln refractory material of the present utility model comprises by axially establishing along rotary kiln
The preformed bricks band of putting; the preformed bricks band is crisscross arranged therewith waters casting 4; kiln body anchor studs 5 and lightweight thermal insulation brick 2; the 3 annular refractory material protective layers of forming; the inner surface kiln hood side of this annular refractory material protective layer and kiln tail side are low-temperature space; the centre is the high-temperature region; described preformed bricks band is built by laying bricks or stones by preformed bricks and is formed; described preformed bricks is nonclient area with watering casting near kiln body anchor studs side; in the face of the rotary kiln inboard is the workspace; it is characterized in that smearing two layers of pitch, make the anchoring of refractory material protective layer and rotary kiln body better on the surface of described kiln body anchor studs 5.Workspace (high-temperature area) around the preformed bricks 1 of described preformed bricks band is equipped with fibrous paper 7, and the height of described fibrous paper 7 is 100～120mm, and thickness is 1～2mm.At the described every interval 1～2m in workspace (high-temperature area) that waters casting 4 dilatation joint is set, is provided with expansion oplate 6 in this dilatation joint, this expansion oplate 6 is the ripple expansion oplate, and it highly is 100～120mm, and thickness is 4～6mm.This expansion oplate 6 is complementary with described dilatation joint.
Because the low-temperature space refractory material swell increment of rotary kiln is less than the refractory material swell increment of high-temperature region, the utility model is provided with a dilatation joint at the every interval 1m in the workspace of watering casting 4 of described high-temperature region (high-temperature area), and every interval 1.5m is provided with a dilatation joint in the workspace of watering casting 4 of described low-temperature space (high-temperature area).Can effectively eliminate the thermal stress of inconsistent generation like this, prevent that the rotary kiln refractory material from coming off, guarantee the ordinary production of rotary kiln because refractory material and steel construction expand.
This kind structure can make fibrous paper 7 expansion oplate 6 interior with being located at dilatation joint that is located at preformed bricks 1 workspace all around melt under the condition of high temperature or burn, and so just stays the slit, for the expansion leaving space of refractory material under the condition of high temperature, promptly eliminates thermal stress.
The operation principle of the anti-drop structure of rotary kiln refractory material of the present utility model is:
Be located at the fibrous paper 7 of the workspace around the preformed bricks 1 and be located at expansion oplate 6 in the dilatation joint and melts under the condition of high temperature or burn, so just stay the slit, the while dilation of the refractory material under the condition of high temperature has been filled the slit, has promptly eliminated thermal stress.
The utility model can effectively be eliminated the thermal stress of the inconsistent generation because refractory material and steel construction expand; simultaneously because dilatation joint does not run through whole refractory material protective layer; can not penetrate into steel plate along dilatation joint and cause " hot spot ", also can not corrode the lightweight thermal insulation brick 2,3 of close kiln body steel plate owing to string wind because of high-temperature flue gas.Prevented that the rotary kiln refractory material from coming off, prolonged the service life of refractory material protective layer, reduced production cost, guaranteed the ordinary production of rotary kiln.
Claims (4)
1. the anti-drop structure of a rotary kiln refractory material; comprise the preformed bricks band that axially is provided with by along rotary kiln; the preformed bricks band is crisscross arranged therewith waters casting; the annular refractory material protective layer that kiln body anchor studs and lightweight thermal insulation brick are formed; the inner surface kiln hood side of this annular refractory material protective layer and kiln tail side are low-temperature space; the centre is the high-temperature region; described preformed bricks band is built by laying bricks or stones by preformed bricks and is formed; described preformed bricks is nonclient area with watering casting near kiln body anchor studs side; in the face of the rotary kiln inboard is the workspace; it is characterized in that the workspace around the preformed bricks of described preformed bricks band is equipped with fibrous paper; at the described every interval 1～2m in workspace that waters casting a dilatation joint is set; in this dilatation joint, be provided with expansion oplate; this expansion oplate and described dilatation joint are complementary, and smear two layers of pitch on the surface of described kiln body anchor studs.
2. the anti-drop structure of rotary kiln refractory material according to claim 1, the height that it is characterized in that described fibrous paper is 100～120mm, thickness is 1～2mm.
3. the anti-drop structure of rotary kiln refractory material according to claim 1 is characterized in that described expansion oplate is the ripple expansion oplate, and it highly is 100～120mm, and thickness is 4～6mm.
4. the anti-drop structure of rotary kiln refractory material according to claim 1, it is characterized in that at the every interval 1m in the workspace of watering casting of described high-temperature region a dilatation joint being set, every interval 1.5m is provided with a dilatation joint in the workspace of watering casting of described low-temperature space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201496824U CN202083213U (en) | 2011-05-12 | 2011-05-12 | Anti-falling structure for refractory material of rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201496824U CN202083213U (en) | 2011-05-12 | 2011-05-12 | Anti-falling structure for refractory material of rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202083213U true CN202083213U (en) | 2011-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201496824U Expired - Fee Related CN202083213U (en) | 2011-05-12 | 2011-05-12 | Anti-falling structure for refractory material of rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202083213U (en) |
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2011
- 2011-05-12 CN CN2011201496824U patent/CN202083213U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20200512 |