CN103033057A - Combustor refractory lining prefabricated building block for cement kiln, production method and application of combustor refractory lining prefabricated building block - Google Patents
Combustor refractory lining prefabricated building block for cement kiln, production method and application of combustor refractory lining prefabricated building block Download PDFInfo
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- CN103033057A CN103033057A CN201210356204XA CN201210356204A CN103033057A CN 103033057 A CN103033057 A CN 103033057A CN 201210356204X A CN201210356204X A CN 201210356204XA CN 201210356204 A CN201210356204 A CN 201210356204A CN 103033057 A CN103033057 A CN 103033057A
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Abstract
The invention relates to a prefabricated building block which comprises a building block 1, an annular lug boss 2 and an annular groove 3, wherein the annular lug boss 2 and the annular groove 3 can be inserted and coincidently connected. A production method of the prefabricated block comprises the following steps of: pouring raw materials in a mould, curing at a 25 DEG C environment temperature and naturally curing for 48 hours after construction, baking in a shuttle kiln by modes of raising the temperature for 5 hours at a temperature raising speed of 25 DEG C/h under an environment of a room temperature 25 DEG C, insulating for 16 hours, and raising the temperature for 10 hours at a temperature raising rate of 25 DEG C/h, and insulating for 6 hours, and then demoulding to obtain the finished block. When the prefabricated building block is use, a high-temperature ceramic fiber blanket is spread on the outer surface of a combustor, and the prefabricated building block is sleeved on the combustor, the annular lug boss of the later building block is inserted into the annular groove of the former building block, and a circular seam is filled by using fire clay, and so on, a refractory lining wrapped outside the combustor is made. The prefabricated building block has the advantages of convenience and rapidness in construction, convenience for disassembly and good use effect during use.
Description
Affiliated technical field
The invention belongs to the refractory material application, is a kind of fire-resistant piece of building that is used in the cement industry privileged site, refers to that especially burner serves as a contrast body with refractory material.
Background technology
Burner is as the main thermal source of cement rotary kiln, its head has 1.5m length will stretch in the kiln, bear the heat effect from flame and grog, also to be subject to simultaneously the invasion and attack of the entrained dust of Secondary Air blower fan, therefore its refractory material lining body is usually owing to washing away of high heat effect and dust-contained airflow peeled off, life-span is generally 3-6 month, does not mate with the cement rotary kiln life cycle, stops separately kiln and overhauls to cement enterprise and bring larger economic loss.
Cement kiln burner refractory material lining body is to adopt the castable refractory cast-in-site to form at present, technical process comprises the weld anchor firmware, formwork, cast, maintenance, the making of burner refractory lining body is finished in baking etc., but because the ambient influnence of making at the scene, be difficult to accomplish sufficient maintenance and baking, capabilities of refractory materials can't reach designing requirement, and casting process optimum environment temperature is 5 ℃～25 ℃, crossing cold or overheated meeting brings the non-sclerous of castable or hardens the phenomenon such as too fast, because the environment of site operation is uncontrollable, therefore also affected the performance of capabilities of refractory materials, caused existing burner refractory lining body result of use undesirable, life-span is generally 3～5 months, even shorter.Burner low reason in service life is: 1) be subject to the invasion and attack of the entrained clinker dust of Secondary Air blower fan; 2) long-term work is about 1400 ℃, and its flame temperature is at 2000 ℃, and the thermic load that refractory material is subject to is huge; 3) flame temperature is unstable, and variations in temperature is frequent, the temperature difference is large; 4) in alkaline atmosphere, work for a long time.
Summary of the invention
The object of the invention is to design that a kind of burner refractory lining body for cement kiln is prefabricated builds piece and production method and application thereof, adopt the prefabricated mode of building piece of castable refractory to reach and guarantee that work progress is controlled, dismounting is convenient.Select the castable refractory of fire resistance excellence to provide the lining body the prefabricated superior fire resistance of building piece, material, pre-manufactured product are combined with construction technology solve the short problem of burner refractory lining body life time, easy construction was quick when the present invention used, and used effect good.
The present invention proposes following solution:
1, adopt high wear resistant castable refractory as material
Previously, the Chinese invention patent application 200610166441.4 of inventor's proposition discloses a kind of super intensified abrasion-proof pouring material.The main body composition of this castable is brown corundum, carborundum, pure calcium aluminate cement, in addition multiple high-purity fine powder, Ultramicro-powder and efficiently disperse water reducer, alkaline-resisting dose, flexibilizer etc., goes out according to rational grating allotment.
At first, brown corundum has hardness large (hardness 9), fusing point high (2050 ℃ of fusing points), and stable chemical nature is to performance sour, that alkali has good repellence.Carborundum also has hardness large (hardness 9.5), fusing point high (3400 ℃ of decomposition temperatures), even in hydrogen-oxygen acid also complete undissolved characteristics.So, make the material of matrix skeleton with brown corundum, carborundum, help to make product to obtain bulk density high, hot strength is large, is enough to resist the invasion and attack of the entrained clinker dust of Secondary Air blower fan.
Secondly, when improving the matrix skeleton, carefully adjust again matrix in conjunction with phase.Quality raw materials fine powder and Ultramicro-powder with abundant electric smelting sintering, cement, additive are combined into matrix by certain appropriate proportioning, thereby guarantee that it is in conjunction with at high temperature giving full play to mutually connection, the effect of cementing aggregate, filling aggregate hole effectively, obtain the higher characteristics such as hot strength, thereby improve the ability of refractory lining body opposing high temperature.
Adopt the in-situ synthesized reaction technology, generate the mullite phase at the matrix of materials partial reaction under the high temperature, can either decompose at hydrated product under the condition of high temperature like this, during the forfeiture of cement bond strength, form Ceramic bond, improve the high temperature hot strength of material, can improve again the institutional framework of material, mineral composition improves the anti-thermal shock stability of material, thereby can resist owing to peeling off that variations in temperature frequently causes.
2, adopt the prefabricated body structure of building, satisfy rapid construction and the replacing of burner refractory lining body.Namely adopt the fire-resistant piece of building of cylindrical shape, front and back are built body unit and are cooperated by emboss pit and splice.Need not cast-in-site, need not the weld anchor firmware, quick, excellent performance are installed, construction environment is not required.The strong castable of aforesaid superelevation is cast in the ganoid steel mold, bakes through abundant maintenance, the kilning of contracting formula, form the fire-resistant part of building after the demoulding.Building the body structure cell parameters is: construction unit length L 1=300～400mm, the fire-resistant body thickness of building is 80～100mm, external diameter is D1=610mm～800mm, inside diameter D 2=450mm～600mm, cellular construction front end boss height is 20～30mm, width is 20～30mm, and the rear end groove height is the same with the front end boss height, and width is 22～32mm.Spread the high-temperature ceramic fibre blanket being close to burner one deck during construction, thickness is 2mm, then will build the body structure unit is enclosed within on the burner, rear one boss of building the body structure unit is inserted in the previous groove of building the body structure unit, the middle approximately circumferential weld of 2mm is filled with chamotte, build body with two and link together, by that analogy, build one by one the continuous burner refractory lining body of making of body.Be pointed out that first builds body and do not have boss, last lining body does not have groove, and last is built body length and determines according to the burner actual size.
Because, adopted wear-resistant castable to significantly improve the fire resistance of burner lining body, adopt the prefabricated mode of castable refractory to guarantee performance performance and the Fast Installation of refractory lining body, therefore solved short problem in burner refractory lining body service life.
Description of drawings
Accompanying drawing 1 is built the block structure schematic diagram for burner refractory lining body of the present invention
Accompanying drawing 2 is the left diagram of accompanying drawing 1
The connection that accompanying drawing 3 is built piece for burner refractory lining body is coated on the application schematic diagram on the burner
Shown in accompanying drawing 1 and accompanying drawing 2, the prefabricated piece of building of burner refractory lining body of the present invention is made of super intensified abrasion-proof pouring material, the prefabricated piece of building of described burner refractory lining body is cylindrical shape, by building piece 1, annular boss 2, annular groove 3 consists of, wherein annular boss 2 is at the front end of building piece 1, annular groove 3 is in the rear end of building piece 1, described annular boss 2 and annular groove 3 can be pegged graft identical, wherein above-mentioned super intensified abrasion-proof pouring material is Chinese invention patent application 200610166441.4 disclosed super intensified abrasion-proof pouring materials, D1 is the prefabricated external diameter of building piece of refractory lining body, D1=610mm～800mm, D2 is the prefabricated internal diameter of building piece of refractory lining body, D2=450mm～600mm, the height of building piece 1 front end annular boss 2 is 20～30mm, width is 20～30mm, the height of building the annular groove 3 of piece 1 rear end is 22～32mm, width is 20～30mm mm, and the prefabricated length L 1 of building piece of refractory lining body is 300～400mm, and thickness L2 is 80～100mm.
As shown in Figure 3, the refractory lining body was built the outside that piece is coated on burner when the present invention used, and wherein D3 is the external diameter of burner, and 4 is the high-temperature ceramic fibre blanket, and 5 is burner.
The production method that burner refractory lining body of the present invention is built piece is: the strong castable of aforesaid superelevation is cast in the ganoid steel mold, through under 25 ℃ the environment temperature and the construction after 48 hours abundant maintenance of natural curing, then after under the environment of 25 ℃ of room temperatures, with 25 ℃/h heating rate, heating up 5 hours, insulation heated up with 25 ℃/h heating rate and toasts in 10 hours, 6 hours shuttle kiln of insulation in 16 hours again, form the refractory lining body after the demoulding and build piece.The construction unit parameter of building piece is: construction unit length L 1=300～400mm, thickness is 80～100mm, external diameter is D1=610mm～800mm, inside diameter D 2=450mm～600mm, cellular construction front end boss height is 20～30mm, building piece front end boss width is 20～30mm, and building piece rear end groove height is 22～32mm, and building piece rear end recess width is 20～30mm mm.
As shown in Figure 3, burner refractory lining body of the present invention is prefabricated to be built and is close at the construction field (site) burner appearance one deck first when piece is used and spreads the high-temperature ceramic fibre blanket, thickness is 2mm, then the prefabricated piece of building of refractory lining body of the present invention is enclosed within on the burner, rear one boss of building the block structure unit is inserted in the previous groove of building the block structure unit, the middle approximately circumferential weld of 2mm is filled with chamotte, can build piece with two and link together, build one by one by that analogy the continuous refractory lining body of making the burner outer cladding of piece.Be pointed out that first builds piece and do not have boss, last builds piece does not have groove, and last length of building piece is determined according to the burner actual size.
The specific embodiment
Embodiment:
Adopt aforesaid wear-resistant castable to make and build body.Burner D3=600mm, L=5715mm.Build 19 altogether of bodies, be pointed out that burner head first builds body unit and do not have boss, last does not have groove.Front 18 construction unit parameters are: length L 1=300mm, and the fire-resistant body thickness of building is 80mm, external diameter is D1=760mm, inside diameter D 2=600mm, cellular construction front end boss height 20mm, width 20mm, rear end groove height 22mm adds rear end recess width 20mm.The 19th construction unit parameter is except length L 1=315mm, and be all identical with front 18 parameters.Spread the high-temperature ceramic fibre blanket being close to burner one deck during construction, thickness is 2mm, tie up with iron wire, then each construction unit is enclosed within on the burner, the boss of a rear construction unit inserts in the groove of previous construction unit, build body unit with 19 and link together, the intermediate gap part is filled with chamotte.Above-mentioned design is after the burner application of certain 5000T/D cement rotary kiln, and the burner life-span was increased to 10 months from 4 months.Any unusual condition does not appear in the use.When building body wearing and tearing, directly change construction unit according to the quantity of breakage, easy for installation and save time.Facts have proved and select super intensified abrasion-proof pouring material, and the prefabricated body structure of building, burner short problem in service life is satisfactorily resolved.
Claims (3)
1. prefabricated piece of building of burner refractory lining body that is used for cement kiln, it is characterized in that: the prefabricated piece of building of described burner refractory lining body is made of super intensified abrasion-proof pouring material, wherein to build piece be cylindrical shape to burner refractory lining body, by building piece 1, annular boss 2, annular groove 3 consists of, wherein annular boss 2 is at the front end of building piece 1, annular groove 3 is in the rear end of building piece 1, described annular boss 2 and annular groove 3 can be pegged graft identical, above-mentioned super intensified abrasion-proof pouring material is Chinese invention patent application 200610166441.4 disclosed super intensified abrasion-proof pouring materials, the described external diameter of building piece 1 is 610mm～800mm, internal diameter is 450mm～600mm, the height of annular boss 2 is 20～30mm, width is 20～30mm, the height of annular groove 3 is 22～32mm, width is 20～30mm, the length L 1 of building piece 1 is 300～400mm, and thickness L2 is 80～100mm.
2. produce the prefabricated method of building piece of refractory lining body claimed in claim 1 for one kind, it is characterized in that: with the strong castable of aforesaid superelevation be cast in the ganoid steel mold, through under 25 ℃ the environment temperature and 48 hours abundant maintenance of natural curing after the construction, then after heating up 5 hours under the environment of 25 ℃ of room temperatures, with 25 ℃/h heating rate, insulation 16 hours, to toast in 25 ℃/h heating rate intensification 10 hours, 6 hours the shuttle kiln of insulation, form the prefabricated piece of building of refractory lining body after the demoulding again.
3. prefabricated using method of building piece of the described cement kiln burner of claim 1 refractory lining body, it is characterized in that: be close at the construction field (site) burner appearance one deck and spread the high-temperature ceramic fibre blanket, thickness is 2mm, then the prefabricated piece 1 of building of burner refractory lining body of the present invention is enclosed within on the burner, rear one annular boss of building piece is inserted in the previous annular groove of building piece, the middle approximately circumferential weld of 2mm is filled with chamotte, can build piece with two links together, build one by one by that analogy the continuous refractory lining body of making the burner outer cladding of piece, wherein first builds piece does not have annular boss, last builds piece does not have annular groove, and last length of building piece is determined according to the burner actual size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210356204.XA CN103033057B (en) | 2012-09-24 | 2012-09-24 | A kind of burner refractory lining body for cement kiln is prefabricated builds block and production method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210356204.XA CN103033057B (en) | 2012-09-24 | 2012-09-24 | A kind of burner refractory lining body for cement kiln is prefabricated builds block and production method and application thereof |
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| CN103033057A true CN103033057A (en) | 2013-04-10 |
| CN103033057B CN103033057B (en) | 2016-01-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235871A (en) * | 2014-09-03 | 2014-12-24 | 无锡雪桃集团有限公司 | Combustion chamber |
| CN106839778A (en) * | 2017-01-14 | 2017-06-13 | 安徽芜湖海螺建筑安装工程有限责任公司 | Castable preliminary drying roasting method and application apparatus in a kind of cement rotary kiln |
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| US5160256A (en) * | 1991-07-19 | 1992-11-03 | Robertshaw Controls Company | Burner construction, igniter assembly therefor and methods of making the same |
| CN2807178Y (en) * | 2005-07-25 | 2006-08-16 | 邯郸钢铁股份有限公司 | Combined casing brick for burner of gas-burnt lime shaft kiln |
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| CN102503472A (en) * | 2011-10-26 | 2012-06-20 | 河南省耕生耐火材料有限公司 | SiC (silicon carbide)-toughened corundum prefabricated part by means of in-situ formation and preparation method for same |
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3486533A (en) * | 1966-03-18 | 1969-12-30 | Rust Furnace Co | Pipe insulation jacket |
| GB1575602A (en) * | 1977-01-13 | 1980-09-24 | Didier Werke Ag | Refractory structures for outlet valves for metallurgical vessels |
| GB2236778A (en) * | 1989-10-10 | 1991-04-17 | Radex Heraklith | Keystone set |
| US5160256A (en) * | 1991-07-19 | 1992-11-03 | Robertshaw Controls Company | Burner construction, igniter assembly therefor and methods of making the same |
| CN2807178Y (en) * | 2005-07-25 | 2006-08-16 | 邯郸钢铁股份有限公司 | Combined casing brick for burner of gas-burnt lime shaft kiln |
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| DE202008007506U1 (en) * | 2008-06-04 | 2009-10-08 | Refratechnik Holding Gmbh | Fireproof outer lining for a burner lance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235871A (en) * | 2014-09-03 | 2014-12-24 | 无锡雪桃集团有限公司 | Combustion chamber |
| CN106839778A (en) * | 2017-01-14 | 2017-06-13 | 安徽芜湖海螺建筑安装工程有限责任公司 | Castable preliminary drying roasting method and application apparatus in a kind of cement rotary kiln |
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| CN103033057B (en) | 2016-01-20 |
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Application publication date: 20130410 Assignee: Zaozhuang Gai Ze stove Engineering Co., Ltd Assignor: Ruitai Technology Co., Ltd. Contract record no.: 2016990000370 Denomination of invention: Combustor refractory lining prefabricated building block for cement kiln, production method and application of combustor refractory lining prefabricated building block Granted publication date: 20160120 License type: Exclusive License Record date: 20160902 |
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Effective date of registration: 20190702 Address after: 277500 Residence of Jiehe Town, Tengzhou City, Zaozhuang City, Shandong Province Patentee after: Shandong Ruitai Gezer Engineering Co., Ltd. Address before: 100024 Dongli 1 # Guanzhuang, Chaoyang District, Beijing Patentee before: Ruitai Technology Co., Ltd. |
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Effective date of registration: 20210219 Address after: 100024 building 27, yard 1, Wuliqiao 1st Street, Chaoyang District, Beijing Patentee after: RUITAI TECHNOLOGY Co.,Ltd. Address before: 277500 Residence of Jiehe Town, Tengzhou City, Zaozhuang City, Shandong Province Patentee before: Shandong Ruitai Gezer Engineering Co.,Ltd. |
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