CN102778123A - Method for preventing fireproof material of rotary kiln from falling down - Google Patents
Method for preventing fireproof material of rotary kiln from falling down Download PDFInfo
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- CN102778123A CN102778123A CN2011101219277A CN201110121927A CN102778123A CN 102778123 A CN102778123 A CN 102778123A CN 2011101219277 A CN2011101219277 A CN 2011101219277A CN 201110121927 A CN201110121927 A CN 201110121927A CN 102778123 A CN102778123 A CN 102778123A
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- refractory material
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- rotary kiln
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Abstract
The invention relates to the technical field of chain grate machine rotary kilns, and in particular relates to a method for preventing a fireproof material of a rotary kiln from falling down. According to the method, an annular fireproof material protection layer consisting of a prefabricated brick band arranged along an axial direction of the rotary kiln, a pouring band staggered from the prefabricated brick band and a kiln body anchoring nail is involved; a kiln head side and a kiln tail side of the inner surface of the annular fireproof material protection layer are low-temperature regions, and the middle of the annular fireproof material protection layer is a high-temperature region; and the prefabricated brick band is built by prefabricated bricks. The method is characterized by comprising the following steps of: arranging fiber paper in a working region around the prefabricated bricks, wherein the fiber paper is 100 to 120 mm high and 1 to 2 mm thick; arranging an expansion slit in the working region of the pouring band at every 1 to 2 m; arranging an expansion board in each expansion slit, wherein the expansion board is 100 to 120 mm high and 4 to 6 mm thick; and smearing two layers of asphalt on the surface of the kiln body anchoring nail, so that the expansion board is matched with the expansion slit. By the method, thermal stress caused by expansion inconsistency of the fireproof material and a steel structure is eliminated; and the fireproof material can be prevented from falling down.
Description
Technical field
The present invention relates to chain grate machine rotary kiln technical field, particularly a kind of method that prevents that the rotary kiln refractory material from coming off.
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 through 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 through length direction expands and eliminate.But; In fact radially steel plate expanded by heating amount 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 present invention provides a kind of method that the rotary kiln refractory material comes off that prevents that prolongs rotary kiln refractory material service life.
The objective of the invention is to realize through following technical proposals:
The method that prevents that the rotary kiln refractory material from coming off of the present invention; Comprise by the preformed bricks band that axially is provided with along rotary kiln, therewith the preformed bricks band be crisscross arranged water the annular refractory material protective layer that casting and kiln body anchor studs 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, and described preformed bricks band is built by laying bricks or stones by preformed bricks and formed, and 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 concrete steps are following:
1) workspace around the preformed bricks of said preformed bricks band is equipped with fibrous paper, and the height of this fibrous paper is 100～120mm, and thickness is 1～2mm,
2) at the said every interval 1～2m in workspace that waters casting a dilatation joint is set,
3) in described dilatation joint, be provided with expansion oplate, the height of this expansion oplate is 100～120mm, and thickness is 4～6mm, and described expansion oplate and described dilatation joint are complementary,
4) smear two layers of pitch on the surface of described kiln body anchor studs.
Every interval 1m is provided with a dilatation joint in the workspace of watering casting of said high-temperature region, and every interval 1.5m is provided with a dilatation joint in the workspace of watering casting of said low-temperature space.
The characteristics of the method that the rotary kiln refractory material comes off that prevent of the present invention are:
Refractory material expansion radially can be heated through 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 through length direction expands and eliminate.But; In fact radially steel plate expanded by heating amount 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 present invention 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; Workspace (high-temperature area) through around preformed bricks is provided with fibrous paper; (high-temperature area) whenever is provided with a dilatation joint at a distance from a segment distance in the workspace of building band, and 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.
Advantage of the present invention is:
1) can effectively eliminate the thermal stress of inconsistent generation, prevent that the rotary kiln refractory material from coming off, the ordinary production of assurance 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 " because of high-temperature flue gas, can be owing to string wind corrodes the lightweight thermal insulation brick near kiln body steel plate yet;
3) prolong service life of refractory material protective layer, reduced production cost.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Below in conjunction with the description of drawings specific embodiment of the present invention.
As shown in Figure 1, the method that prevents that the rotary kiln refractory material from coming off of the present invention comprises by axially being provided with along rotary kiln
The preformed bricks band, therewith the preformed bricks band be crisscross arranged water the annular refractory material protective layer that casting 4 and kiln body anchor studs 5 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, and described preformed bricks band is built by laying bricks or stones by preformed bricks and formed, and 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 concrete steps are following:
1) workspace around the preformed bricks 1 of said preformed bricks band is equipped with fibrous paper 7, and the height of this fibrous paper 7 is 100～120mm, and thickness is 1～2mm;
2) at the said every interval 1～2m in workspace that waters casting 4 dilatation joint is set;
3) in described dilatation joint, be provided with expansion oplate 6, the height of this expansion oplate 6 is 100～120mm, and thickness is 4～6mm, and described expansion oplate 6 is complementary with described dilatation joint;
4) smear two layers of pitch on the surface of described kiln body anchor studs 5.Make the anchoring property of refractory material protective layer and rotary kiln body better.
Because the low-temperature space refractory material swell increment of rotary kiln is less than the refractory material swell increment of high-temperature region; Every interval 1m is provided with a dilatation joint in the workspace of watering casting 4 of said high-temperature region in the present invention, and every interval 1.5m is provided with a dilatation joint in the workspace of watering casting 4 of said low-temperature space.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.
The operation principle of the method that the rotary kiln refractory material comes off that prevents of the present invention is:
The fibrous paper 7 that is located at the workspace around the preformed bricks 1 be located at expansion oplate 6 in the dilatation joint and under the condition of high temperature, melt 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 present invention can effectively eliminate 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 " because of high-temperature flue gas, can be owing to string wind corrodes the lightweight thermal insulation brick 2,3 near kiln body steel plate yet.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 (2)
1. method that prevents that the rotary kiln refractory material from coming off; Comprise by the preformed bricks band that axially is provided with along rotary kiln, therewith the preformed bricks band be crisscross arranged water the annular refractory material protective layer that casting, 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, and described preformed bricks band is built by laying bricks or stones by preformed bricks and formed, and 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 concrete steps are following:
1) workspace around the preformed bricks of said preformed bricks band is equipped with fibrous paper, and the height of this fibrous paper is 100～120mm, and thickness is 1～2mm,
2) at the said every interval 1～2m in workspace that waters casting a dilatation joint is set,
3) in described dilatation joint, be provided with expansion oplate, the height of this expansion oplate is 100～120mm, and thickness is 4～6mm, and described expansion oplate and described dilatation joint are complementary,
4) smear two layers of pitch on the surface of described kiln body anchor studs.
2. the method that prevents that the rotary kiln refractory material from coming off according to claim 1; It is characterized in that every interval 1m is provided with a dilatation joint in the workspace of watering casting of said high-temperature region, every interval 1.5m is provided with a dilatation joint in the workspace of watering casting of said low-temperature space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101219277A CN102778123A (en) | 2011-05-12 | 2011-05-12 | Method for preventing fireproof material of rotary kiln from falling down |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101219277A CN102778123A (en) | 2011-05-12 | 2011-05-12 | Method for preventing fireproof material of rotary kiln from falling down |
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| CN102778123A true CN102778123A (en) | 2012-11-14 |
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| CN2011101219277A Pending CN102778123A (en) | 2011-05-12 | 2011-05-12 | Method for preventing fireproof material of rotary kiln from falling down |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206461A (en) * | 2013-03-21 | 2013-07-17 | 洛阳轴研科技股份有限公司 | Method for eliminating axial thermal expansion generated by high-speed matched angular contact ball bearing |
| CN103557695A (en) * | 2013-11-06 | 2014-02-05 | 长沙矿冶研究院有限责任公司 | Furnace building method for rotary kiln tube body inner liner |
| CN104792155A (en) * | 2015-04-27 | 2015-07-22 | 云南源鑫炭素有限公司 | Method for installing composite type refractory lining of rotary kiln |
| CN106679426A (en) * | 2016-12-24 | 2017-05-17 | 安徽芜湖海螺建筑安装工程有限责任公司 | Application method for adding anti-corrosion and thermal-insulation material into shell of cement rotary kiln |
| CN107356110A (en) * | 2017-08-11 | 2017-11-17 | 攀钢集团钒业有限公司 | Masonry of Rotary Kiln structure |
| CN107504816A (en) * | 2017-09-26 | 2017-12-22 | 中材建设有限公司 | The prefabricated refractory liner and its construction method of high-temperature service top structure |
Citations (4)
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|---|---|---|---|---|
| GB1200912A (en) * | 1967-07-14 | 1970-08-05 | Kaiser Aluminium Chem Corp | Improvements in or relating to refractory linings for rotary kilns |
| JP2001133158A (en) * | 1999-11-09 | 2001-05-18 | Sumitomo Heavy Ind Ltd | Method for operating rotary kiln |
| CN2795766Y (en) * | 2005-06-17 | 2006-07-12 | 徐向成 | Rotary kiln inner lining with support leg and inner lining prefabricated block |
| CN101706201A (en) * | 2009-09-16 | 2010-05-12 | 新兴铸管股份有限公司 | Kiln head structure and kiln tail structure of pelletizing rotary kiln |
-
2011
- 2011-05-12 CN CN2011101219277A patent/CN102778123A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1200912A (en) * | 1967-07-14 | 1970-08-05 | Kaiser Aluminium Chem Corp | Improvements in or relating to refractory linings for rotary kilns |
| JP2001133158A (en) * | 1999-11-09 | 2001-05-18 | Sumitomo Heavy Ind Ltd | Method for operating rotary kiln |
| CN2795766Y (en) * | 2005-06-17 | 2006-07-12 | 徐向成 | Rotary kiln inner lining with support leg and inner lining prefabricated block |
| CN101706201A (en) * | 2009-09-16 | 2010-05-12 | 新兴铸管股份有限公司 | Kiln head structure and kiln tail structure of pelletizing rotary kiln |
Non-Patent Citations (2)
| Title |
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| 张宇: "《回转窑施工技术》", 《天津冶金》, 31 December 2009 (2009-12-31) * |
| 柏登成: "《预制砖锚固焊砌筑与不定型浇注结合在回转窑中应用》", 《轻金属》, 31 December 2004 (2004-12-31) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206461A (en) * | 2013-03-21 | 2013-07-17 | 洛阳轴研科技股份有限公司 | Method for eliminating axial thermal expansion generated by high-speed matched angular contact ball bearing |
| CN103206461B (en) * | 2013-03-21 | 2015-06-17 | 洛阳轴研科技股份有限公司 | Method for eliminating axial thermal expansion generated by high-speed matched angular contact ball bearing |
| CN103557695A (en) * | 2013-11-06 | 2014-02-05 | 长沙矿冶研究院有限责任公司 | Furnace building method for rotary kiln tube body inner liner |
| CN103557695B (en) * | 2013-11-06 | 2015-07-15 | 长沙矿冶研究院有限责任公司 | Furnace building method for rotary kiln tube body inner liner |
| CN104792155A (en) * | 2015-04-27 | 2015-07-22 | 云南源鑫炭素有限公司 | Method for installing composite type refractory lining of rotary kiln |
| CN106679426A (en) * | 2016-12-24 | 2017-05-17 | 安徽芜湖海螺建筑安装工程有限责任公司 | Application method for adding anti-corrosion and thermal-insulation material into shell of cement rotary kiln |
| CN107356110A (en) * | 2017-08-11 | 2017-11-17 | 攀钢集团钒业有限公司 | Masonry of Rotary Kiln structure |
| CN107504816A (en) * | 2017-09-26 | 2017-12-22 | 中材建设有限公司 | The prefabricated refractory liner and its construction method of high-temperature service top structure |
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Application publication date: 20121114 |