CN102393142A - Low-heat conduction refractory brick for rotary kiln - Google Patents
Low-heat conduction refractory brick for rotary kiln Download PDFInfo
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- CN102393142A CN102393142A CN2011103640608A CN201110364060A CN102393142A CN 102393142 A CN102393142 A CN 102393142A CN 2011103640608 A CN2011103640608 A CN 2011103640608A CN 201110364060 A CN201110364060 A CN 201110364060A CN 102393142 A CN102393142 A CN 102393142A
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Abstract
The invention discloses a low-heat conduction refractory brick for a rotary kiln. A brick body comprises a large face, a cold face, a bottom face and a hot face, wherein a heat insulation groove is formed on the cold face, and a lot preventing groove is formed on the large face. According to the technical scheme adopted by the invention, the heat insulation groove is formed on the cold face of the brick, the lot preventing groove is formed on the large face, and bricks are bonded through high-strength fire clay, thus a structure with strong heat insulation performance and good stability can be formed, the service life of a kiln body can be obviously prolonged, and the heat radiation loss of the kiln body can be reduced.
Description
Technical field
The present invention relates to a kind of rotary kiln with low heat conduction refractory brick.
Background technology
The aluminum silica refractory lining body of cement rotary kiln is that wedge type refractory brick ring is built the brick circle that forms.Rely on the chamotte bonding between fragment of brick and the fragment of brick, squeeze into steel plate locking again.But this structure has the shortcoming of the big and poor stability of radiation loss.Up to now, people have adopted following 4 kinds of methods to reduce to turn round the radiation loss of kiln lining body, but not very successful:
1) uses the individual layer heat-barrier material.Though the heat-barrier material thermal conductivity is low, the porosity is big, and erosion resisting is poor.So though use the individual layer insulated lining can improve thermal insulation, the porosity is high, erosion resisting is poor.So, use the individual layer insulated lining will cause lining to suffer erosion and damage very soon.
2) design dual-layer lining, promptly the rotary kiln lining is made up of one deck compacted zone, one deck thermal insulation layer.This design is that shortcoming is the poor stability of kiln lining.Owing to have relative motion between kiln body and the kiln lining, damage very soon after the thermal insulation layer in the kiln lining is frayed, compacted zone collapses rapidly because of losing to support.
3) use composite brick, promptly a brick is made up of compacted zone and thermal insulation layer.For unburned refractory, this structure is successful; For sintered refractory, this structure is because of compacted zone has different chemical compositions with the thermal insulation layer refractory material, different physical properties goes wrong.For example, normal inconsistent because of the sintering temperature of compacted zone and thermal insulation layer, cause burning or underburnt to occur, composite brick damages because of quality is bad very soon.
4) use the stool brick, promptly the bottom of a brick is cut out a groove, filling fireclay insulating refractory in the groove.At this moment, usually irregular because of kiln cylinder body, two " legs " the stool brick are too thin, and " leg " that causes brick fractureed, and cause kiln lining to lose to support and collapse.
Behind gravitate, the kiln body section of cement rotary kiln no longer is the circle of a rule, and is deformed into the curved surface of a similar ellipse.Along with the rotation of kiln body, the refractory brick in the kiln lining will receive the effect of periodic pressure.On the other hand, kiln body and kiln lining occur becoming flexible because of thermal expansion coefficient difference.For example, the thermal coefficient of expansion of kiln body is 14 * 10-6/ ℃; The thermal coefficient of expansion of high-alumina brick is 7 * 10-6/ ℃.Like the kiln temperature is 350 ℃, the kiln of diameter 4.7M, and the gap of 31mm will appear in every circle brick and every circle kiln body in the tangential.Like this, along with the rotation of kiln, loosening laying bricks will receive the extruding of kiln body and damage.
Summary of the invention
Technical problem to be solved by this invention provides a kind of rotary kiln with low heat conduction refractory brick, makes the cement rotary kiln kiln lining have certain thermal insulation and good mechanical stability simultaneously.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: rotary kiln is with low heat conduction refractory brick, and the brick body comprises big face, huyashi-chuuka (cold chinese-style noodles), bottom surface, hot side, and said huyashi-chuuka (cold chinese-style noodles) is provided with heat insulation groove, and said big is provided with anti-lot groove.
As preferably, the height of said brick body is that 200 ± 20mm, length are 198mm.
As preferably, said heat insulation groove is parallel with said bottom surface, and the distance of the side of said heat insulation groove and two bottom surfaces is 50 ± 10mm.
As preferably, the degree of depth of said heat insulation groove is 20 ± 10mm.
As preferably, said anti-lot groove is a square groove, and the distance of the bottom surface of said anti-lot groove and said heat insulation groove is 20 ± 10mm.
As preferably, the height of said anti-lot groove is that 42 ± 10mm, length are 98 ± 20mm.
The present invention is owing to adopted technique scheme; The huyashi-chuuka (cold chinese-style noodles) of this brick has heat insulation groove, big face that anti-lot groove is arranged; By high-strength chamotte bonding, thermal insulation is strong, the structure of good stability thereby can form between brick and the brick, can obviously improve the service life of kiln body and reduce the radiation loss of kiln body.
Description of drawings
Fig. 1 is the structural representation of rotary kiln of the present invention with low heat conduction refractory brick
Fig. 2 is the cutaway view of A-A among Fig. 1
The specific embodiment
Further describe below in conjunction with the accompanying drawing specific embodiments of the invention.
Illustrated in figures 1 and 2ly is rotary kiln of the present invention with low heat conduction refractory brick, the brick body comprises big face 1, huyashi-chuuka (cold chinese-style noodles) 2, bottom surface 3, hot side 4, and said big be the plane (front of brick body among Fig. 1) of area maximum in the refractory brick; Said huyashi-chuuka (cold chinese-style noodles) is the lower plane (the top of brick body in the accompanying drawing) of refractory brick temperature in using, otherwise is hot side (bottom of brick body in the accompanying drawing).Said huyashi-chuuka (cold chinese-style noodles) 2 is provided with heat insulation groove 21, and said big 1 is provided with anti-lot groove 11.The height of said brick body is that 200 ± 20mm, length are 198mm.Said heat insulation groove 21 is parallel with said bottom surface 3, and the distance of the side of said heat insulation groove 21 and two bottom surfaces 3 is 50 ± 10mm.The degree of depth of said heat insulation groove 21 is 20 ± 10mm.Said anti-lot groove 11 is a square groove, and said anti-lot groove 11 is 20 ± 10mm with the distance of the bottom surface of said heat insulation groove 21.The height of said anti-lot groove 11 is that 42 ± 10mm, length are 98 ± 20mm, is 3.5 ± 3mm deeply.
When building kiln, any material of not filling in recessed of huyashi-chuuka (cold chinese-style noodles).The big face of brick is bonded to one another with high-strength chamotte, and making interosculates between the fragment of brick becomes to have the firm masonry of certain globality, and thermal insulation is strong, the structure of good stability thereby can form, and can obviously improve the service life of kiln body and reduce the radiation loss of kiln body.
The invention has the advantages that:
When 1) building kiln, any material of not filling in recessed of huyashi-chuuka (cold chinese-style noodles).On the one hand, simplified production; On the other hand, the space of reservation can be play a part to strengthen heat insulation.
2) " shank " of stool type refractory brick is that the width of the both sides boss of recessed of huyashi-chuuka (cold chinese-style noodles) is increased to 50 ± 10mm, significantly increased the support force of " shank ", prevented to damage because of " shank " kiln lining that causes that fractures.
3) big and recessed block high-strength chamotte of middle filling of refractory brick, recessed is worked to strengthen the chamotte bonding, has prevented that refractory brick blocks from coming off to be commonly called as " lot ".
Because above advantage, the present invention becomes a kind of low heat conduction refractory brick that is applied to cement rotary kiln, has to form that thermal insulation is strong, the characteristics of good stability structure the service life that can obviously reduce the radiation loss of kiln body and help improving kiln lining.
Claims (6)
1. rotary kiln is with low heat conduction refractory brick, and the brick body comprises big face (1), huyashi-chuuka (cold chinese-style noodles) (2), bottom surface (3), hot side (4), it is characterized in that: said huyashi-chuuka (cold chinese-style noodles) (2) is provided with heat insulation groove (21), and said big (1) is provided with anti-lot groove (11).
2. use low heat conduction refractory brick according to the said rotary kiln of claim 1, it is characterized in that: the height of said brick body is that 200 ± 20mm, length are 198mm.
3. use low heat conduction refractory brick according to the said rotary kiln of claim 2, it is characterized in that: said heat insulation groove (21) is parallel with said bottom surface (3), and the distance of the side of said heat insulation groove (21) and two bottom surfaces (3) is 50 ± 10mm.
4. use low heat conduction refractory brick according to the said rotary kiln of claim 2, it is characterized in that: the degree of depth of said heat insulation groove (21) is 20 ± 10mm.
5. use low heat conduction refractory brick according to the said rotary kiln of claim 2, it is characterized in that: said anti-lot groove (11) is a square groove, and said anti-lot groove (11) is 20 ± 10mm with the distance of the bottom surface of said heat insulation groove (21).
6. use low heat conduction refractory brick according to the said rotary kiln of claim 2, it is characterized in that: the height of said anti-lot groove (11) is that 42 ± 10mm, length are 98 ± 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103640608A CN102393142A (en) | 2011-11-16 | 2011-11-16 | Low-heat conduction refractory brick for rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103640608A CN102393142A (en) | 2011-11-16 | 2011-11-16 | Low-heat conduction refractory brick for rotary kiln |
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| CN102393142A true CN102393142A (en) | 2012-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103640608A Pending CN102393142A (en) | 2011-11-16 | 2011-11-16 | Low-heat conduction refractory brick for rotary kiln |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB735068A (en) * | 1951-11-03 | 1955-08-10 | Degussa | Ceramic structural unit resistant to high temperatures and to variations in temperature |
| WO2006111519A1 (en) * | 2005-04-19 | 2006-10-26 | Siemens Aktiengesellschaft | Heat shield element for lining a combustion chamber wall, combustion chamber and gas turbine |
| CN201092692Y (en) * | 2007-10-01 | 2008-07-30 | 陈永盛 | Concrete perforated brick |
| CN101424485A (en) * | 2008-11-26 | 2009-05-06 | 中冶焦耐工程技术有限公司 | Fire-resistant material heat insulation technology for inner liner of rotary kiln |
| CN202329157U (en) * | 2011-11-16 | 2012-07-11 | 范圣良 | Low-heat-conduction fire brick for rotary kiln |
-
2011
- 2011-11-16 CN CN2011103640608A patent/CN102393142A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB735068A (en) * | 1951-11-03 | 1955-08-10 | Degussa | Ceramic structural unit resistant to high temperatures and to variations in temperature |
| WO2006111519A1 (en) * | 2005-04-19 | 2006-10-26 | Siemens Aktiengesellschaft | Heat shield element for lining a combustion chamber wall, combustion chamber and gas turbine |
| CN201092692Y (en) * | 2007-10-01 | 2008-07-30 | 陈永盛 | Concrete perforated brick |
| CN101424485A (en) * | 2008-11-26 | 2009-05-06 | 中冶焦耐工程技术有限公司 | Fire-resistant material heat insulation technology for inner liner of rotary kiln |
| CN202329157U (en) * | 2011-11-16 | 2012-07-11 | 范圣良 | Low-heat-conduction fire brick for rotary kiln |
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Application publication date: 20120328 |