CN102249707A - Composite refractory material - Google Patents
Composite refractory material Download PDFInfo
- Publication number
- CN102249707A CN102249707A CN2011101202223A CN201110120222A CN102249707A CN 102249707 A CN102249707 A CN 102249707A CN 2011101202223 A CN2011101202223 A CN 2011101202223A CN 201110120222 A CN201110120222 A CN 201110120222A CN 102249707 A CN102249707 A CN 102249707A
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- thermofin
- raw material
- flame retardant
- retardant coating
- composite fire
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Abstract
The invention provides composite refractory material, which is formed by two layers and the adhesive force and the corrosion resistance of the material between the two layers are improved. The two layers are a refractory layer with a best corrosion resistance at 1300 DEG C and a heat insulation layer capable of reducing the heat loss. The composite refractory material (1) is formed by the integration of the refractory layer (2) and the heat insulation layer (4) by pre-casting technique or by the adhering with an adhesive. The refractory layer (2) is made of basic refractory material and the heat insulation layer (4) is formed by indefinite material of low thermal conductivity at 0.2-1 w/m*k. The thermal expansion coefficient difference of the two layers is 0 to 6*10-6/K.
Description
Technical field
The present invention relates to the composite fire thing that uses on a kind of furnace lining at rotary oven etc.
Background technology
The rotary oven that uses in cement factory or pulp factories has the structure that is lined with refractory walls in the inside of cylinder shell.In the past, the technology as the thermosteresis that reduces rotary oven adopted following method: 2 layers of structure liner being made the thermofin of flame retardant coating and low heat conductivity in the refractory walls of enclosure interior.
When having adopted 2 layers of such structure, in rotary oven, owing in housing, moved vertically by burned material, therefore on this direction, produce stress easily for backup lining brick, when stove moves, have because of the problem of two-layerly peeling off from being made to the frictional force of 2 layers of structural portion generation effect of refractory walls, flame retardant coating comes off by burned material.As the technology that addresses this problem, the application's applicant discloses the technology (patent documentation 1) of two-layer interface being made waveform morphology.In addition, about its manufacture method, following precast technology is disclosed: at first, with the corresponding molding box of the peripheral shape of refractory body in the casting forming material of pouring heat insulating material, pressing mold with waveform shape applies waveform in the above, after treating that insulation material layer to a certain degree solidifies, the casting forming material of pouring fireproof material thereon carries out the demoulding after it is solidified.In addition, recording in the patent documentation 1: for for the situation of flame retardant coating and thermofin being carried out simultaneously the tile product that press molding forms under same pressure, can not use Bulk Specific Gravity material very inequality as two layers of material, and with respect to this, according to the precast technology, therefore the Bulk Specific Gravity difference that can make two layers of material is greater than tile product,, the thermal conductivity of thermofin reduces, and can obtain good energy-saving effect.
But, viewpoint from chemical ingredients, the flame retardant coating of patent documentation 1 and thermofin all are by same constituting (two-layer be neutral refractory or two-layer for alkaline refractory body), and with respect to this, when rotary oven for example is used under the hot environment more than 1300 ℃, from the viewpoint of erosion resistance, flame retardant coating is preferably by alkaline refractory body (for example MgO, MgOAl
2O
3Raw material) constitute, and thermofin wishes to be the low heat conductivity below the 1W/mk from energy-conservation viewpoint, preferably mainly by acid or neutral raw material (Al for example
2O
3, SiO
2Raw material) constitutes.
Owing to the thermal expansivity that the bond strength to flame retardant coating and thermofin exerts an influence is greatly different with acidity or neutral raw material because of alkaline refractory body, therefore easily chap, in addition, constituting flame retardant coating by alkaline refractory body, constituting the situation of thermofin by acid or neutral raw material, at solid burning (the baked I of alkaline refractory body
め) under the required hot conditions, and can dissolve on the interface of acid or neutral raw material, by high temperature burn till make two-layer integrated be very difficult technically.
With respect to this, though known have a technology that attaches low thermal conduction lagging material (so-called geta formula brick (ゲ タ ば I レ Application ガ)) between flame retardant coating that is made of alkaline refractory body and the thermofin that is made of acid or neutral raw material, but problem is, for joint by geta formula brick, the clinging power of two interlayers a little less than, can not obtain the desired clinging power of using as the furnace lining material of rotary oven of composite fire thing.
Patent documentation 1: the special fair 6-103153 communique of Japan
Summary of the invention
The objective of the invention is to address the above problem, a kind of composite fire thing is provided, it has following 2 layers: the flame retardant coating that has optimum corrosion resistance when using under the hot environment more than 1300 ℃; With reducing thermofin best on the thermosteresis, and realized the raising of clinging power of this 2 interlayer and the raising of erosion resistance.
The composite fire thing of the present invention that is used to address the above problem is for making flame retardant coating and the incorporate composite fire thing of thermofin by the precast technology or by the attaching by bonding raw material, it is characterized in that, this flame retardant coating is made of alkaline refractory body, this thermofin is made of the indefinite form material of the low heat conductivity with 0.2～1W/mk, and the coefficient of thermal expansion differences of flame retardant coating and thermofin is 0～6 * 10
-6/ K.
According to scheme 1 described composite fire thing, scheme 2 described inventions are characterised in that: thermofin contains Al
2O
3, SiO
2With among the MgO any as main constituent.
According to scheme 1 described composite fire thing, scheme 3 described inventions are characterised in that: contain one of hollow raw material and porous raw material or both sides in the manufacturing raw material of thermofin, it adds up to amount for making 10～60 quality % scopes in the raw material.
According to scheme 1 or 2 described composite fire things, scheme 4 described inventions are characterised in that: contain fibrous raw material in the manufacturing raw material of thermofin, it adds up to amount for making 1～20 quality % scope in the raw material.
According to scheme 1 described composite fire thing, scheme 5 described inventions are characterised in that: have the inter coat of 0.1～2mm between flame retardant coating and thermofin, this inter coat contains Al
2O
3, MgOAl
2O
3, ZrO
2, SiO
2In any as main constituent.
According to scheme 1 described composite fire thing, scheme 6 described inventions are characterised in that: the interface of flame retardant coating and thermofin is a concaveconvex shape.
The invention effect
In composite fire thing involved in the present invention, by having constituting of the flame retardant coating that constitutes by the superior alkaline refractory body of erosion resistance, optimum corrosion resistance when having realized under the hot environment more than 1300 ℃, using, constituting of the thermofin that constitutes by the indefinite form material by the low heat conductivity with 0.2～1W/mk realized the best thermofin that thermosteresis reduces.
Because alkaline refractory body is greatly different with the thermal expansivity of acid or neutral raw material, therefore, in the prior art, clinging power between these 2 layers of flame retardant coating that constitutes by alkaline refractory body and the thermofins that mainly constitute by acid or neutral raw material a little less than, the refractory walls of using as the furnace lining material of rotary oven has the problem that can not obtain satisfied clinging power, but in the present invention, by thermofin being made the formation of indefinite form material, can be not do not make flame retardant coating and thermofin integrated by burning till, be specially, can make flame retardant coating and thermofin integrated by the precast technology or by attaching, by having the formation of waveform interface between these 2 layers and the coefficient of thermal expansion differences of flame retardant coating and thermofin is 0～6 * 10 by bonding raw material
-6The formation of/K can realize the clinging power between these 2 layers.
Like this, by not making flame retardant coating and thermofin integrated by burning till, be specially, make flame retardant coating and thermofin integrated by the precast technology or by attaching by bonding raw material, owing to need not to burn till cost, therefore, have and to make more at an easy rate than burnt brick, and can be used as the advantage of the lagging material of low-thermal conductivity.
Thermofin is preferably with Al
2O
3, SiO
2, among the MgO any be constituent, adds one of hollow raw material and porous raw material or both sides with the total amount, in the scope of 10～60 quality % and the thermofin that forms.In addition, also can with this hollow raw material or porous raw material at least any or individually, in the scope of 1～20 quality %, add fibrous raw material and form.Thus, can form the thermofin of low heat conductivity with 0.2～1W/mk.In addition, by between flame retardant coating and thermofin, forming with Al
2O
3, MgOAl
2O
3, ZrO
2, SiO
2In any be the inter coat of 0.1～2mm of constituent, can realize further having improved the clinging power of erosion resistance and each interlayer.And then, by the interface of flame retardant coating and thermofin is made concaveconvex shape, can further improve the connectivity of 2 interlayers.
Description of drawings
Fig. 1 is the side-view of the composite fire thing of embodiment.
Fig. 2 is the front view of the composite fire thing of liner Fig. 1 on rotary oven.
Fig. 3 is the side-view of the interface of flame retardant coating and thermofin.
Fig. 4 is the side-view of the interface of flame retardant coating and thermofin.
Nomenclature
1 composite fire thing;
2 flame retardant coatings;
3 inter coats;
4 thermofins;
5 housings;
11 fronts
Embodiment
Below show preferred embodiment of the present invention.
In Fig. 1～Fig. 2,1 expression composite fire thing, 2 expression flame retardant coatings, 3 expression inter coats, 4 expression thermofins, the cylinder shell of 5 expression rotary ovens.As shown in Figure 1, the composite fire thing 1 of present embodiment has roughly rectangular blocks shape, be made of following three-decker in the stove inboard of being moved by burned material: flame retardant coating 2, at the thermofin 4 of furnace wall side has inter coat in the centre of flame retardant coating 2 and thermofin 4.Flame retardant coating 2 is made of alkaline refractory body, and thermofin 4 is to be constituent with acid or neutral raw material, and is made of the indefinite form material of the low heat conductivity with 0.2～1W/mk.
As mentioned above, constituting flame retardant coating by alkaline refractory body, constitute the situation of thermofin by acid or neutral raw material, under the required hot conditions of the solid burning of alkaline refractory body, with can dissolve on the interface of acid or neutral raw material, by high temperature burn till make two-layer integrated be very difficult technically, and then, known have a technology that is pasted with low thermal conduction lagging material (so-called geta formula brick) between flame retardant coating that is made of alkaline refractory body and the thermofin that is made of acid or neutral raw material, but the bounding force that has two interlayers for such structure a little less than, can not get the problem of the desired clinging power of composite fire thing used as the furnace lining material of rotary oven.With respect to this, among the present invention, by except adopting not by burning till that the thermofin that makes the flame retardant coating that is made of alkaline refractory body and be made of acid or neutral raw material is incorporate and constituting, the coefficient of thermal expansion differences that makes flame retardant coating and thermofin is 0～6 * 10
-6/ K, and adopt thermofin to constitute by the indefinite form material of low heat conductivity with 0.2～1W/mk, solve the problems referred to above, have the flame retardant coating of optimum corrosion resistance when using and reducing these 2 layers of thermofins best on the thermosteresis, and realized the composite fire thing of the raising of the raising of clinging power of this 2 interlayer and erosion resistance for realizing having under the hot environment more than 1300 ℃.In addition, in the present invention, " not integrated by burning till " not only is meant integrated by the precast technology, and comprise that the flame retardant coating that will be separately be shaped in advance with the bonding raw material and thermofin attach and make it integrated, this precast technology is, at first with the corresponding molding box of the peripheral shape of refractory body in the casting forming material of pouring heat insulating material, pressing mold with waveform shape applies waveform in the above, after insulation material layer to a certain degree solidifies, the casting forming material of pouring fireproof material more thereon carries out the demoulding after it is solidified.As this bonding raw material, can use for example with Al
2O
3, MgOAl
2O
3, ZrO
2, SiO
2In any be the raw material of constituent.
And then, also by the interface of each interlayer being made the formation of concaveconvex shape, realized the raising of each interlayer clinging power among the present invention.Under situation about making as the waveform shape of Fig. 1, if the height height of ripple, then stress is concentrated in its base portion, and interlayer might be peeled off, and therefore, the height of preferred ripple is below the 20mm.In addition, if make half wave type shown in Figure 3, making it highly is 10～20mm, then splitting can not take place, and can access good clinging power.In addition, also can form quadrate projection as shown in Figure 4, but this occasion, for fear of stress concentration, preference is as carrying out the chamfer machining precedent as 45 ° to base portion.
As shown in Figure 1, the front 11 of refractory body 1 is made into the shape of approximate isosceles trapezoid.
Flame retardant coating
The alkaline indefinite form material that flame retardant coating 2 can be pressurized construction or casting and constructing or any in the basic brick, the wave head portion of the interface of waveform can be a housing direction, also can be axial.
(thermofin)
Thermofin 4 is with Al
2O
3, SiO
2, among the MgO at least one be the indefinite form material of constituent.For thermofin 4 being become the low heat conductivity of 0.2～1W/mk, preferably by the total amount, be that the scope of 10～60 quality % is added one of hollow raw material and porous raw material or both sides in whole raw material, perhaps being that the scope of 1～20 quality % is with hollow raw material and porous raw material or add fibrous raw material individually and form in whole raw material.At this, can use for example mullite hollow ball (mullite bubble), grog hollow ball (chamotte bubble) etc. as the hollow raw material, as the porous raw material, can use for example light weight brick fragment, perlite etc.In addition, as fibrous raw material, can use for example sepiolite etc.If addition is lower than above-mentioned scope, then becoming is difficult to guarantee the low heat conductivity of 0.2～1W/mk, otherwise, if too much, then intensity can reduce.
The middle layer
Preferably by between flame retardant coating 2 and thermofin 4, forming with Al
2O
3, MgOAl
2O
3, ZrO
2, SiO
2In at least one be the inter coat 3 of constituent, relax the thermal expansivity between thermofin 4 and the flame retardant coating 2, thus the further raising of the clinging power of realization erosion resistance and each interlayer.The thickness of inter coat 3 is preferably 0.1～2mm.
Embodiment
Table 1
The meaning that the mark of value column is represented is as follows:
◎: excellent
Zero: good
△: qualified
*: defective
With the corresponding molding box of the peripheral shape of flame retardant coating 2 in heat insulation casting forming material of forming of cast each shown in the table 1, form waveform in the above with the pressing mold of waveform shape.After insulation material layer to a certain degree solidifies, inter coat shown in the table 1 is set thereon, after inter coat to a certain degree solidifies, further pour into a mould fire-resistant casting forming material that each shown in the table 1 formed, after being solidified, it carries out the demoulding, integrated by what can't help to burn till, make the composite fire matter sample of the size of JISR2103 regulation, following assessment item is estimated.Table 1 has shown the evaluation of relevant following project and the chemical ingredients of each layer, and the physicals of thermofin (thermal expansion difference of the thermal conductivity of thermofin, flame retardant coating and thermofin).In addition, in table 1, the remainder of the remainder of flame retardant coating, the remainder of thermofin and inter coat is a binder constituents.In addition, each shown in the table 1 that consist of of each casting forming material formed.
Embodiment 11
The flame retardant coating and the thermofin that will be shaped respectively in advance attach with bonding raw material, and be integrated by what can't help to burn till, makes the composite fire matter sample of the size of JISR2103 regulation, and following assessment item is estimated.In the table 1, except the chemical constitution of the evaluation of relevant following project and each layer, also shown the physical property (thermal expansion difference of the thermal conductivity of thermofin, flame retardant coating and thermofin) of thermofin.As this bonding raw material, used with Al
2O
3, MgOAl
2O
3, ZrO
2, SiO
2In any be the raw material of constituent.In addition, in embodiment 11, though flame retardant coating has used the brick that is shaped by burning till, thermofin has used the castable thing that is shaped by not burning till, but be not particularly limited the method that flame retardant coating and thermofin are formed respectively in advance, can all serve as reasons and burn till the layer that forms, also can all be by the non-layer that forms that burns till.
Plasticity is estimated
In the casting forming material, if mobile poor, then can not form in a conventional manner, " be full of cracks " problem for example can take place.Therefore, in each casting forming material, add the construction moisture of regulation, in the cast progressive die, confirm by the outward appearance behind the mould of pulling down the demoulding thereafter, estimated the plasticity of each layer.In addition, the plasticity evaluation among the embodiment 11 is that the plasticity of thermofin is estimated.
Intensity evaluation
The thermofin of the composite fire matter sample that cuts out integrated has been estimated intensity based on JISR2553.
Fire-resistant/heat insulation cohesiveness
The binding part of the fire-resistant/thermofin of the composite fire matter sample that cuts out integrated has been estimated intensity based on JISR2553.
Anti-reactivity
The binding part of the fire-resistant/thermofin of the composite fire matter sample that cuts out integrated has been estimated the reaction condition of burning till the back binding part at 1300 ℃.
The thermofin of the composite fire matter sample that cuts out integrated carries out corrosion test and has made evaluation based on JISR2214.
Investigation about inter coat:
Investigation about the addition of hollow raw material and porous raw material or fibrous raw material:
Comparative example 1, comparative example 3
Comparative example 1 is the few example of addition of hollow raw material, porous raw material and fibrous raw material, and comparative example 3 is the examples that all do not add hollow raw material, porous raw material and fibrous raw material.This situation, (" coefficient of thermal expansion differences of flame retardant coating and thermofin is 0～6 * 10 can not to obtain the coefficient of thermal expansion differences of thermofin of the present invention
-6/ K ") and heat conductivity (" low heat conductivity of 0.2～1W/mk ").As comparative example 3, if coefficient of thermal expansion differences surpasses 6 * 10
-6/ K then can not obtain fire-resistant fully/heat insulation cohesiveness.
Comparative example 2
For coefficient of thermal expansion differences surpasses 6 * 10
-6The example of/K can not obtain fire-resistant fully/heat insulation cohesiveness.
Comparative example 4
For the heat conductivity of thermofin surpasses the example of 1W/mk, can not obtain fire-resistant fully/heat insulation cohesiveness.
Embodiment 12
For excessively having added the example of hollow raw material, porous raw material, though can durable, fire-resistant/heat insulation cohesiveness be in low-level in the use.
Embodiment 13, embodiment 14
For the thickness of inter coat surpasses the example of 2mm, though can durable, fire-resistant/heat insulation cohesiveness be in low-level in the use.
Embodiment 15
For excessively having added the example of fibrous raw material, though can durable, fire-resistant/heat insulation cohesiveness be in low-level in the use.
Table 1
Claims (6)
1. composite fire thing, for making flame retardant coating and the incorporate composite fire thing of thermofin by the precast technology or by attaching by bonding raw material, it is characterized in that, described flame retardant coating is made of alkaline refractory body, described thermofin is made of the indefinite form material of the low heat conductivity with 0.2～1W/mk
The coefficient of thermal expansion differences of flame retardant coating and thermofin is 0～6 * 10
-6/ K.
2. composite fire thing according to claim 1 is characterized in that thermofin contains Al
2O
3, SiO
2With among the MgO any as main constituent.
3. composite fire thing according to claim 1 is characterized in that, contains one of hollow raw material and porous raw material or both sides in the manufacturing raw material of thermofin, and it adds up to amount for making 10～60 quality % scopes in the raw material.
4. composite fire thing according to claim 1 and 2 is characterized in that, contains fibrous raw material in the manufacturing raw material of thermofin, and it adds up to amount for making 1～20 quality % scope in the raw material.
5. composite fire thing according to claim 1 is characterized in that, has the inter coat of 0.1～2mm between flame retardant coating and thermofin, and this inter coat contains Al
2O
3, MgOAl
2O
3, ZrO
2And SiO
2In any as main constituent.
6. composite fire thing according to claim 1 is characterized in that, the interface of flame retardant coating and thermofin is a concaveconvex shape.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-106890 | 2010-05-07 | ||
| JP2010106890 | 2010-05-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102249707A true CN102249707A (en) | 2011-11-23 |
| CN102249707B CN102249707B (en) | 2015-04-08 |
Family
ID=44977328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110120222.3A Expired - Fee Related CN102249707B (en) | 2010-05-07 | 2011-05-09 | Composite refractory material |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5553793B2 (en) |
| KR (1) | KR101758926B1 (en) |
| CN (1) | CN102249707B (en) |
| TW (1) | TWI527698B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445081A (en) * | 2012-01-04 | 2012-05-09 | 洛阳洛华窑业有限公司 | High-strength energy-saving combined furnace wall |
| CN111225889A (en) * | 2017-10-17 | 2020-06-02 | Lg电子株式会社 | Sagger for sintering positive electrode active material of lithium secondary battery and manufacturing method thereof |
| CN113773111A (en) * | 2021-08-18 | 2021-12-10 | 洛阳九久耐磨材料制造有限公司 | Temperature-resistant corrosion-resistant composite coating for surface of steel casting |
| CN117399598A (en) * | 2023-12-14 | 2024-01-16 | 钢铁研究总院有限公司 | Method for improving solidification quality of large-size vacuum induction ingot |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101601955B1 (en) * | 2014-08-26 | 2016-03-09 | (주)케이알 | Inner fireproof material for furnace |
| JP6482957B2 (en) * | 2015-06-04 | 2019-03-13 | 日本碍子株式会社 | Compound refractory |
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| JPH06103153B2 (en) * | 1989-05-16 | 1994-12-14 | 日本碍子株式会社 | Refractory for rotary kiln |
| JP2008007341A (en) * | 2006-06-27 | 2008-01-17 | Nippon Steel Materials Co Ltd | Low thermal expansion ceramic joined body and method for manufacturing the same |
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| CN201407902Y (en) * | 2009-05-18 | 2010-02-17 | 北京京诚凤凰工业炉工程技术有限公司 | Complex fiber furnace lining and annular furnace with same |
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| JP4373691B2 (en) * | 2003-03-18 | 2009-11-25 | ニチアス株式会社 | Heat-resistant structure for firing electronic parts and method for producing the same |
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2011
- 2011-04-15 KR KR1020110035324A patent/KR101758926B1/en active IP Right Grant
- 2011-04-19 TW TW100113486A patent/TWI527698B/en not_active IP Right Cessation
- 2011-04-27 JP JP2011099453A patent/JP5553793B2/en not_active Expired - Fee Related
- 2011-05-09 CN CN201110120222.3A patent/CN102249707B/en not_active Expired - Fee Related
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| JPH06103153B2 (en) * | 1989-05-16 | 1994-12-14 | 日本碍子株式会社 | Refractory for rotary kiln |
| JP2008007341A (en) * | 2006-06-27 | 2008-01-17 | Nippon Steel Materials Co Ltd | Low thermal expansion ceramic joined body and method for manufacturing the same |
| CN101412629A (en) * | 2008-08-29 | 2009-04-22 | 瑞泰科技股份有限公司 | Periclase-magnesium aluminate spinel composite refractory brick and technique for producing the same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445081A (en) * | 2012-01-04 | 2012-05-09 | 洛阳洛华窑业有限公司 | High-strength energy-saving combined furnace wall |
| CN102445081B (en) * | 2012-01-04 | 2016-03-23 | 洛阳洛华窑业有限公司 | A kind of high-strength energy-saving combined furnace wall |
| CN111225889A (en) * | 2017-10-17 | 2020-06-02 | Lg电子株式会社 | Sagger for sintering positive electrode active material of lithium secondary battery and manufacturing method thereof |
| CN113773111A (en) * | 2021-08-18 | 2021-12-10 | 洛阳九久耐磨材料制造有限公司 | Temperature-resistant corrosion-resistant composite coating for surface of steel casting |
| CN117399598A (en) * | 2023-12-14 | 2024-01-16 | 钢铁研究总院有限公司 | Method for improving solidification quality of large-size vacuum induction ingot |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5553793B2 (en) | 2014-07-16 |
| KR20110123656A (en) | 2011-11-15 |
| JP2011252696A (en) | 2011-12-15 |
| TW201139143A (en) | 2011-11-16 |
| TWI527698B (en) | 2016-04-01 |
| CN102249707B (en) | 2015-04-08 |
| KR101758926B1 (en) | 2017-07-17 |
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