CN101446471B - Lining structure of electrical calcination furnace - Google Patents
Lining structure of electrical calcination furnace Download PDFInfo
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- CN101446471B CN101446471B CN2007102027206A CN200710202720A CN101446471B CN 101446471 B CN101446471 B CN 101446471B CN 2007102027206 A CN2007102027206 A CN 2007102027206A CN 200710202720 A CN200710202720 A CN 200710202720A CN 101446471 B CN101446471 B CN 101446471B
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Abstract
The invention discloses a lining structure of an electrical calcination furnace. The lining structure comprises a furnace shell (6) and a furnace cover (7); a refractory brick layer which is close to the center of the furnace is divided into two parts, that is, an end refractory brick part (1) positioned in low-temperature areas of the upper end and the lower end and a middle refractory brick part (2) positioned in a high-temperature area; a refractory insulating particle layer (3) is positioned outside the end refractory brick part (1) and the middle refractory brick part (2), an insulating layer (4) is positioned outside the refractory insulating particle layer (3), a ceramic fiber layer (5) is positioned outside the insulating layer (4), and the furnace shell (6) is positioned outside the ceramic fiber layer (5); and an upper electrode (9) is positioned in the center of the upper part of the furnace body, and a lower electrode (10) is positioned in the center of the lower part of the furnace body. The lining structure has the advantages of simple construction, wide temperature operating range, stable service performance, long service life, guaranteed quality and capacity of the product, high utilization rate of the electrical heat energy as well as low operation and maintenance cost.
Description
Technical field
The present invention relates to a kind of carbon calcination production equipment, especially relate to a kind of lining structure of electrical calcination furnace.
Background technology
At present, the electrical calcination furnace production requirement is forged back Jiao with raw material and is calcined to high temperature more than 1300 ℃, and the structure of inner lining of furnace and selection are the most key problems.Three-deckers such as available technology adopting high-alumina brick, firebrick particle and asbestos board are as liner.The defective of this inner lining structure is: 1) furnace wall temperature is too high, and heat radiation is big, has both caused a large amount of losses of electric energy, has strengthened the temperature burden of steel furnace shell again, and operating environment is worsened; 2) because the inner lining of furnace material does not have difference vertically, and high-temperature region, stove stage casing liner serviceability temperature reaches capacity, and the low-temperature space at two ends reaches the liner maximum operation (service) temperature far away about the stove, causes inner lining material not obtain sufficient reasonable use.
Recently the furnace wall heat radiation is attempted to reduce merely with the inner lining of furnace thickening by some producer, but Yin Wendu is too high again subsequently the inner lining of furnace material is burnt out, and causes the blowing out accident.Obviously, existing lining structure of electrical calcination furnace is not ideal enough.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of novel lining structure of electrical calcination furnace is provided, and this structure simple structure, serviceability is stable, long service life, product quality and production capacity are guaranteed, electrical heat energy utilization rate height, operation and maintenance cost are low.
Technical scheme of the present invention is: it comprises furnace shell, bell, lean on most the fire brick layer at stove center to be divided into two parts, promptly be in the end refractory brick and the middle part refractory brick that is in the high-temperature region of two ends low-temperature space up and down, the refractory heat-insulating stratum granulosum is in outside end refractory brick and the middle part refractory brick, heat-insulation layer is in outside the refractory heat-insulating stratum granulosum, ceramic fiber layer is in outside the heat-insulation layer, and furnace shell is in outside the ceramic fiber layer; Upper electrode is in the middle of the top of body of heater, and lower electrode is in the middle of the body of heater bottom; End refractory brick is that high-alumina brick, middle part refractory brick are that mullite brick, refractory heat-insulating stratum granulosum are particle diameter 1～5mm graininess padding.
Obviously, the high-temperature region is the zone that is between upper electrode and the lower electrode.
Liner is outward cylindric furnace shell, and top is the castable refractory bell, with the asbestos cord sealing, stays on the bell and establishes the filling that plurality of holes is used for the refractory heat-insulating particle between bell and the fire brick layer.
Above-mentioned end refractory brick brick layer thickness 150～300mm, interior empty diameter is decided according to production capacity, generally at φ 1500～2500mm.
Aforesaid middle part refractory brick brick layer thickness 150～300mm, brick layer upper surface is concordant with the lower surface of upper electrode.
Aforesaid refractory heat-insulating stratum granulosum thickness is 40～50mm, along the axial elongated layout of stove.
Aforesaid heat-insulation layer is an insulating brick, and this layer thickness is 80～130mm, along the axial elongated layout of stove.
Aforesaid ceramic fiber layer is the ceramic beaverboard glued construction, and two-layer inside and outside being divided into, two interlayers are answered the fissure of displacement, and interior layered suture also will stagger with the heat-insulation layer brickwork joint.
Aforesaid bell is the castable refractory structure, should evenly stay in the bell circular annular region scope of refractory heat-insulating stratum granulosum vertical direction and establish plurality of holes, is convenient to replenishing of refractory heat-insulating particle, and the refractory fibre filling is used in this hole at ordinary times.
Fire brick layer and segmentation arrange, and each layer design serviceability temperature improves, make the stove operating temperature to extend to about 1700 ℃ from 1400 ℃ of general use, many liner damages that cause because of operate miss not only can be eliminated in about 300 ℃ of temperature operation spaces, and have created condition for the quality and yield of stove raising product.
Compared with prior art, the present invention constructs simply, and the temperature operation space is big, and serviceability is stable, high life, and product quality and production capacity are guaranteed, electrical heat energy utilization rate height, operation and maintenance cost are low.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Embodiments of the invention:
Liner is outward cylindric furnace shell 6, and top is castable refractory bell 7, seals with asbestos cord 8 between bell 7 and the fire brick layer.
End refractory brick 1 is positioned at the most inboard next-door neighbour of stove and calcines material, and a part is in the stove upper end, and another part is in the stove lower end, brick layer thickness 160mm, interior empty diameter phi 1930mm; Use material to be one-level high-alumina brick LZ-75, apparent porosity is not more than 23%, and the 0.2MPa loading softening begins 1520 ℃ of temperature, and cold crushing strength is greater than 53.9MPa.
The middle part refractory brick 2 that is in stove stage casing highest temperature zone also is positioned at the most inboard next-door neighbour of stove and calcines material, brick layer thickness 160mm, interior empty diameter phi 1930mm; Use material to be mullite brick, bulk density is not less than 2.55g/cm
3, apparent porosity is not more than 18%, and the 0.2MPa refractoriness under load is greater than 1700 ℃, and cold crushing strength is greater than 78.4MPa; Brick layer upper surface is concordant with the lower surface of upper electrode 9, and brick layer lower surface is lower than the upper surface 1400mm of lower electrode 10, the about 3640mm of brick layer height overall.
Refractory heat-insulating stratum granulosum 3 is a zirconia hollow ball particle, particle diameter 1～5mm, and 2200 ℃ of long-term serviceability temperatures, thermal conductivity factor is not more than 0.35W/m.K; This layer thickness is 44mm, along the axial elongated layout of stove; This layer can absorb fire brick layer and at high temperature produce radial expansion volume.
Heat-insulation layer 4 is the poly-light insulating brick structure of high alumina, and thermal conductivity factor is not more than 0.29W/m.K, and cold crushing strength is not less than 3MPa, and 1400 ℃ of x12h heavily burn the line variation and are not more than 2%; This layer thickness is 95mm, along the axial elongated layout of stove.
Castable refractory bell 7 is suspended on the furnace shell 6 by 8 blocks of angle steel that are welded on the top, be lined with asbestos cord 8 between bell and the end refractory brick 1, when fire brick layer at high temperature produced axial expansion, asbestos cord 8 was compacted, the wt part of bell 7 or all supported by fire brick layer.
Evenly stay in the circular annular region scope of the bell 7 of refractory heat-insulating stratum granulosum 3 vertical direction and established 16 φ, 40 holes 11, be convenient to replenishing of zirconia hollow ball particle, clog with refractory fibre in this hole at ordinary times.
The stove operating temperature extends to about 1700 ℃, about 300 ℃ of temperature operation spaces from 1400 ℃ of general use.
Claims (8)
1. lining structure of electrical calcination furnace, it comprises furnace shell (6), bell (7), it is characterized in that: lean on the fire brick layer at stove center to be divided into two parts most, promptly be in the end refractory brick (1) of two ends low-temperature space up and down and be in the middle part refractory brick (2) of high-temperature region, refractory heat-insulating stratum granulosum (3) is in outside end refractory brick (1) and the middle part refractory brick (2), heat-insulation layer (4) is in outside the refractory heat-insulating stratum granulosum (3), ceramic fiber layer (5) is in outside the heat-insulation layer (4), and furnace shell (6) is in outside the ceramic fiber layer (5); Upper electrode (9) is in the middle of the top of body of heater, and lower electrode (10) is in the middle of the body of heater bottom; End refractory brick (1) is that one-level high-alumina brick LZ-75, middle part refractory brick (2) are the poly-light insulating brick of high alumina for mullite brick, refractory heat-insulating stratum granulosum (3) for particle diameter 1～5mm zirconia hollow ball particle, heat-insulation layer (4).
2. lining structure of electrical calcination furnace according to claim 1 is characterized in that: seal with asbestos cord (8) between the fire brick layer of bell (7) and upper end low-temperature space.
3. lining structure of electrical calcination furnace according to claim 1 is characterized in that: described end refractory brick (1) brick layer thickness 150～300mm, interior empty diameter is φ 1500～2500mm.
4. lining structure of electrical calcination furnace according to claim 1 is characterized in that: described middle part refractory brick (2) brick layer thickness 150～300mm, brick layer upper surface is concordant with the lower surface of upper electrode (9).
5. lining structure of electrical calcination furnace according to claim 1 is characterized in that: described refractory heat-insulating stratum granulosum (3) thickness is 40～50mm, along the axial elongated layout of stove.
6. lining structure of electrical calcination furnace according to claim 1 is characterized in that: the thickness of described heat-insulation layer (4) is 80～130mm, along the axial elongated layout of stove.
7. lining structure of electrical calcination furnace according to claim 1 is characterized in that: described ceramic fiber layer (5) is the ceramic beaverboard glued construction, be divided into inside and outside two-layer, the two interlayer fissure of displacement, and interior layered suture and heat-insulation layer (4) brickwork joint stagger.
8. lining structure of electrical calcination furnace according to claim 1 is characterized in that: be installed with hole (11) on the bell (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007102027206A CN101446471B (en) | 2007-11-27 | 2007-11-27 | Lining structure of electrical calcination furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007102027206A CN101446471B (en) | 2007-11-27 | 2007-11-27 | Lining structure of electrical calcination furnace |
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| Publication Number | Publication Date |
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| CN101446471A CN101446471A (en) | 2009-06-03 |
| CN101446471B true CN101446471B (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007102027206A Active CN101446471B (en) | 2007-11-27 | 2007-11-27 | Lining structure of electrical calcination furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102979994B (en) * | 2012-11-30 | 2014-12-03 | 宁夏天纵泓光节能余热技术有限公司 | Method for manufacturing electric arc furnace fume heat insulating pipe and electric arc furnace fume heat insulating pipe |
| CN107238079A (en) * | 2017-06-27 | 2017-10-10 | 河南省登封市光大耐火材料有限公司 | A kind of incinerator of anti-thermal shock |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3837630A (en) * | 1972-03-20 | 1974-09-24 | Rheinstahl Ag | Method of lining metallurgical furnaces and a lining material |
| CN2066126U (en) * | 1989-06-10 | 1990-11-21 | 于善明 | Combined inside lining of cement kiln furnace |
| CN2708212Y (en) * | 2004-01-20 | 2005-07-06 | 山东鲁阳股份有限公司 | Heat insulating holding furnace liner for carbon element calcining kiln |
| CN2747529Y (en) * | 2004-11-02 | 2005-12-21 | 贵阳铝镁设计研究院 | Structure of liner for limestone kiln |
| CN200967831Y (en) * | 2006-08-17 | 2007-10-31 | 武汉威林炉衬材料有限责任公司 | Metal heat treating furnace lining |
-
2007
- 2007-11-27 CN CN2007102027206A patent/CN101446471B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3837630A (en) * | 1972-03-20 | 1974-09-24 | Rheinstahl Ag | Method of lining metallurgical furnaces and a lining material |
| CN2066126U (en) * | 1989-06-10 | 1990-11-21 | 于善明 | Combined inside lining of cement kiln furnace |
| CN2708212Y (en) * | 2004-01-20 | 2005-07-06 | 山东鲁阳股份有限公司 | Heat insulating holding furnace liner for carbon element calcining kiln |
| CN2747529Y (en) * | 2004-11-02 | 2005-12-21 | 贵阳铝镁设计研究院 | Structure of liner for limestone kiln |
| CN200967831Y (en) * | 2006-08-17 | 2007-10-31 | 武汉威林炉衬材料有限责任公司 | Metal heat treating furnace lining |
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| CN101446471A (en) | 2009-06-03 |
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Owner name: GUIYANG ALUMINUM AND MAGNESIUM DESIGN INSTITUTE CO Free format text: FORMER NAME: GUIYANG ALUMINIUM AND MAGNESIUM DESIGN INST. |
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Address after: 550081 Guiyang Province, Jinyang New District, Zhu Zhu Road, No. 2 Patentee after: Guiyang Aluminum & Magnesium Design Institute Co., Ltd. Address before: 550004 No. 208, Beijing Road, Guiyang, Guizhou Patentee before: Guiyang Aluminium and Magnesium Design Inst. |