CN106478118B - A kind of micro- closed pore clay refractory aggregate of light weight and preparation method thereof - Google Patents
A kind of micro- closed pore clay refractory aggregate of light weight and preparation method thereof Download PDFInfo
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- CN106478118B CN106478118B CN201610903994.7A CN201610903994A CN106478118B CN 106478118 B CN106478118 B CN 106478118B CN 201610903994 A CN201610903994 A CN 201610903994A CN 106478118 B CN106478118 B CN 106478118B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/04—Clay; Kaolin
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/661—Multi-step sintering
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- Chemical & Material Sciences (AREA)
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- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Ceramic Products (AREA)
Abstract
The present invention relates to micro- closed pore clay refractory aggregates of a kind of light weight and preparation method thereof.Its technical solution is: with 3 ~ 10 DEG C/min of heating rate, by lumpy clay raw material temperature-gradient method to final temperature to get the micro- closed pore clay refractory aggregate of light weight.The temperature-gradient method to final temperature is: when temperature rises to 300 DEG C, 400 DEG C, 500 DEG C, 600 DEG C, 800 DEG C, 900 DEG C, 1100 DEG C and final temperature respectively, respectively keeping the temperature 1 ~ 4 hour.The final temperature is 1200 ~ 1500 DEG C.The Al of the lumpy clay raw material2O3Content is 30 ~ 50wt%.Present invention process is simply and at low cost；The micro- closed pore clay refractory aggregate of prepared light weight has the characteristics that apparent porosity is low, closed porosity is high, intensity is high, average pore size is small and high-temperature resistant medium washes away erosion well.
Description
Technical field
The invention belongs to technical field of refractory materials.More particularly to a kind of micro- closed pore clay refractory aggregate of light weight and its preparation
Method.
Background technique
In recent years, energy-saving one of the important research direction as hot industry, heat preserving and insulating material have obtained rapidly
Development, light weight hot industry furnace lining also attract more and more attention, and work lining refractories lightweight is current refractory material
One important development direction of industry.Firstly, fireclay insulating refractory is closer to working face, heat-insulating and energy-saving effect is better, work
Heat loss can be effectively reduced in lining refractories lightweight, reduce production cost, have the function that energy-saving and emission-reduction；Secondly as
There is more stomata in light weight refractory material, thermal stress can be effectively accommodated in jump in temperature, promote material heat resistanceheat resistant and peel off
Performance.Therefore, extensive concern of the research of working lining light weight refractory material by refractories industry.
Refractory aggregate lightweight is to realize the light-weighted main path of work lining refractories.The light weight aggregate reported at present
Preparation method mainly has: the inorganic matters decomposition method such as organic matter decomposition method, foam in place hole creating technology and hydroxide.However it uses
Above-mentioned preparation method is all by raw material grinding reshaping, and on the one hand the process is more complicated, it is often more important that, prepared fire resisting
The usual apparent porosity of aggregate is higher, aperture is larger, and the erosion and infiltration of slag and high-temperature medium can not be resisted in use process.
Yellow Austria et al. research discovery microporous can significantly improve resistance to slag (the A. Huang, H. of lightweight refractory material
Z. Gu, Y. Zou, Towards efficient modeling on slag corrosion of lightweight
corundum spinel castable for ladle, in: Proceeding of the 13th Unified
International Technical Conference on Refractories (UNITECR), 2013, Victoria,
BC, Canada.), therefore, developing the refractory aggregate with low apparent porosity, tiny aperture is to promote light weight fireproof material slag resistance
The key of performance.
" a kind of micropore light weight alumina refractory aggregate and preparation method thereof " (ZL 201410447797.X) patented technology and
" a kind of micro- closed pore light-weight corundum fireproof aggregate and preparation method thereof " (ZL 201410405108.9) patented technology, using wet process
It is prepared for a kind of light weight alumina refractory aggregate and light-weight corundum fireproof aggregate containing a large amount of micro- holes of holding one's breath respectively, however, being adopted
Wet method preparation process is relatively complicated, it is more difficult to realize industrialized production.
Summary of the invention
The present invention is directed to overcome prior art defect, it is therefore an objective to provide a kind of simple process and the micro- closed pore of light weight at low cost
Clay refractory aggregate preparation method；Have apparent porosity low, silent with the micro- closed pore clay refractory aggregate of light weight prepared by this method
The porosity is high, intensity is high, average pore size is small and high-temperature resistant medium washes away the feature corroded.
To achieve the above object, the technical solution adopted by the present invention is that:, will be blocky with 3 ~ 10 DEG C/min of heating rate
The temperature-gradient method of clay raw material is to final temperature to get the micro- closed pore clay refractory aggregate of light weight.
The temperature-gradient method to final temperature is: when temperature rise to respectively 300 DEG C, 400 DEG C, 500 DEG C, 600 DEG C, 800 DEG C,
900 DEG C, 1100 DEG C and when final temperature, respectively keep the temperature 1 ~ 4 hour.
The final temperature is 1200 ~ 1500 DEG C.
The Al of the lumpy clay raw material2O3Content is 30 ~ 50wt%.
Due to the adoption of the above technical scheme, the present invention has following good effect compared with prior art:
1) for the present invention without carrying out other pretreatments to raw material, used lumpy clay raw material are raw for natural clay block
Mine, can be to natural clay block rawore dinectly bruning, simple production process.
2) present invention can be in different temperatures using the mineral such as kaolinite and montmorillonite contained in natural clay block rawore
A series of lower the characteristics of decomposition and crystal transfer occurs, isothermal holding is carried out at corresponding temperature, is made in above-mentioned mineral
Constitution water and the crystallization water can slowly be deviate from, so that hole caused by decomposition and crystal transfer is retained in inside blank.Separately
Outside, mullitization reaction can occur during heat treatment for natural clay rawore, the reaction process with certain volume expansion,
To form a certain number of holes in blank internal in-situ.The present invention carries out specific heat treatment under the conditions of high temperature, promotes
Crystal boundary rate travel makes the above-mentioned closing of pores that closed pore be formed in situ, to be made, bulk density is low, apparent porosity is low and closes
The micro- closed pore clay refractory aggregate of the high light weight of implication porosity.
The micro- closed pore clay refractory aggregate of light weight prepared by the present invention is through detecting: bulk density is 1.4 ~ 2.2g/cm3, show
The porosity is 2 ~ 10%, and average pore size is 0.1 ~ 1 μm.
Therefore, present invention process is simply and at low cost；The micro- closed pore clay refractory aggregate of prepared light weight has apparent pore
The characteristics of rate is low, closed porosity is high, intensity is high, average pore size is small and high-temperature resistant medium washes away erosion.
Specific embodiment
The invention will be further described With reference to embodiment, not to the limitation of its protection scope.
The Al of lumpy clay raw material described in present embodiment2O3Content is 30 ~ 50wt%, is repeated no more in embodiment.
Embodiment 1
A kind of micro- closed pore clay refractory aggregate of light weight and preparation method thereof.Preparation method described in the present embodiment is: with 3 ~ 7
DEG C/min heating rate, by lumpy clay raw material temperature-gradient method to final temperature to get the micro- closed pore clay fire resisting bone of light weight
Material.
The temperature-gradient method to final temperature is: when temperature rise to respectively 300 DEG C, 400 DEG C, 500 DEG C, 600 DEG C, 800 DEG C,
900 DEG C, 1100 DEG C and when final temperature, respectively keep the temperature 1 ~ 3 hour.
The final temperature is 1350 ~ 1500 DEG C.
The micro- closed pore clay refractory aggregate of light weight prepared by the present embodiment is through detecting: bulk density is 1.4 ~ 1.6g/cm3；
Apparent porosity is 6 ~ 10%；Average pore size is 0.6 ~ 1 μm.
Embodiment 2
A kind of micro- closed pore clay refractory aggregate of light weight and preparation method thereof.Preparation method described in the present embodiment is: with 3 ~ 7
DEG C/min heating rate, by lumpy clay raw material temperature-gradient method to final temperature to get the micro- closed pore clay fire resisting bone of light weight
Material.
The temperature-gradient method to final temperature is: when temperature rises to 300 DEG C, 400 DEG C, 500 DEG C, 600 DEG C, 800 DEG C respectively
When with 900 DEG C, respectively 1 ~ 3 hour is kept the temperature；When temperature rises to 1100 DEG C, 2 ~ 4 hours are kept the temperature；When temperature rises to final temperature,
Heat preservation 1 ~ 3 hour.
The final temperature is 1350 ~ 1500 DEG C.
The micro- closed pore clay refractory aggregate of light weight prepared by the present embodiment is through detecting: bulk density is 1.5 ~ 1.75g/cm3；
Apparent porosity is 5 ~ 10%；Average pore size is 0.5 ~ 1 μm.
Embodiment 3
A kind of micro- closed pore clay refractory aggregate of light weight and preparation method thereof.Preparation method described in the present embodiment is: with 3 ~ 7
DEG C/min heating rate, by lumpy clay raw material temperature-gradient method to final temperature to get the micro- closed pore clay fire resisting bone of light weight
Material.
The temperature-gradient method to final temperature is: when temperature rises to 300 DEG C, 400 DEG C, 500 DEG C, 600 DEG C, 800 DEG C respectively
When with 900 DEG C, respectively 1 ~ 3 hour is kept the temperature；When temperature rises to 1100 DEG C respectively and when final temperature, respectively 2 ~ 4 hours are kept the temperature.
The final temperature is 1350 ~ 1500 DEG C.
The micro- closed pore clay refractory aggregate of light weight prepared by the present embodiment is through detecting: bulk density is 1.6 ~ 1.8g/cm3；
Apparent porosity is 4 ~ 8%；Average pore size is 0.4 ~ 0.8 μm.
Embodiment 4
A kind of micro- closed pore clay refractory aggregate of light weight and preparation method thereof.Preparation method described in the present embodiment is: with 3 ~ 7
DEG C/min heating rate, by lumpy clay raw material temperature-gradient method to final temperature to get the micro- closed pore clay fire resisting bone of light weight
Material.
The temperature-gradient method to final temperature is: when temperature is risen to respectively as 300 DEG C, 400 DEG C, 500 DEG C, 600 DEG C, 800
DEG C, 900 DEG C when and at 1100 DEG C, respectively keep the temperature 2 ~ 4 hours；When being warming up to final temperature, 1 ~ 3 hour is kept the temperature.
The final temperature is 1350 ~ 1500 DEG C.
The micro- closed pore clay refractory aggregate of light weight prepared by the present embodiment is through detecting: bulk density is 1.7 ~ 1.95g/cm3；
Apparent porosity is 4 ~ 7%；Average pore size is 0.4 ~ 0.7 μm.
Embodiment 5
A kind of micro- closed pore clay refractory aggregate of light weight and preparation method thereof.Preparation method described in the present embodiment is: with 6 ~ 10
DEG C/min heating rate, by lumpy clay raw material temperature-gradient method to final temperature to get the micro- closed pore clay fire resisting bone of light weight
Material.
The temperature-gradient method to final temperature is: when temperature rise to respectively 300 DEG C, 400 DEG C, 500 DEG C, 600 DEG C, 800 DEG C,
At 900 DEG C and 1100 DEG C, respectively 1 ~ 3 hour is kept the temperature；When being warming up to final temperature, 2 ~ 4 hours are kept the temperature.
The final temperature is 1200 ~ 1350 DEG C.
The micro- closed pore clay refractory aggregate of light weight prepared by the present embodiment is through detecting: bulk density is 1.7 ~ 1.95g/cm3；
Apparent porosity is 4 ~ 9%；Average pore size is 0.5 ~ 0.8 μm.
Embodiment 6
A kind of micro- closed pore clay refractory aggregate of light weight and preparation method thereof.Preparation method described in the present embodiment is: with 6 ~ 10
DEG C/min heating rate, by lumpy clay raw material temperature-gradient method to final temperature to get the micro- closed pore clay fire resisting bone of light weight
Material.
The temperature-gradient method to final temperature is: when temperature rises to 300 DEG C, 400 DEG C, 500 DEG C, 600 DEG C, 800 DEG C respectively
When with 900 DEG C, respectively 1 ~ 3 hour is kept the temperature；When temperature rises to 1100 DEG C respectively and when final temperature, respectively 2 ~ 4 hours are kept the temperature.
The final temperature is 1200 ~ 1350 DEG C.
The micro- closed pore clay refractory aggregate of light weight prepared by the present embodiment is through detecting: bulk density is 1.75 ~ 2.05g/
cm3；Apparent porosity is 5 ~ 8%；Average pore size is 0.4 ~ 0.8 μm.
Embodiment 7
A kind of micro- closed pore clay refractory aggregate of light weight and preparation method thereof.Preparation method described in the present embodiment is: with 6 ~ 10
DEG C/min heating rate, by lumpy clay raw material temperature-gradient method to final temperature to get the micro- closed pore clay fire resisting bone of light weight
Material.
The temperature-gradient method to final temperature is: when temperature rise to respectively 300 DEG C, 400 DEG C, 500 DEG C, 600 DEG C, 800 DEG C,
At 900 DEG C, respectively 2 ~ 4 hours are kept the temperature；When temperature rises to 1100 DEG C, 1 ~ 3 hour is kept the temperature；When temperature rises to final temperature, protect
Temperature 2 ~ 4 hours.
The final temperature is 1200 ~ 1350 DEG C.
The micro- closed pore clay refractory aggregate of light weight prepared by the present embodiment is through detecting: bulk density is 1.85 ~ 2.05g/
cm3；Apparent porosity is 3 ~ 6%；Average pore size is 0.2 ~ 0.7 μm.
Embodiment 8
A kind of micro- closed pore clay refractory aggregate of light weight and preparation method thereof.Preparation method described in the present embodiment is: with 6 ~ 10
DEG C/min heating rate, by lumpy clay raw material temperature-gradient method to final temperature to get the micro- closed pore clay fire resisting bone of light weight
Material.
The temperature-gradient method to final temperature is: when temperature rise to respectively 300 DEG C, 400 DEG C, 500 DEG C, 600 DEG C, 800 DEG C,
900 DEG C and when final temperature, respectively keep the temperature 2 ~ 4 hours.
The final temperature is 1200 ~ 1350 DEG C.
The micro- closed pore clay refractory aggregate of light weight prepared by the present embodiment is through detecting: bulk density is 2.0 ~ 2.2g/cm3；
Apparent porosity is 2 ~ 5%；Average pore size is 0.1 ~ 0.3 μm.
Present embodiment has following good effect compared with prior art:
1) present embodiment is not necessarily to carry out raw material other pretreatments, and used lumpy clay raw material are natural viscous
Soil block material rawore, can be to natural clay block rawore dinectly bruning, simple production process.
2) present embodiment can be using the mineral such as kaolinite and montmorillonite contained in natural clay block rawore
A series of the characteristics of decomposition and crystal transfer occur under different temperatures, isothermal holding is carried out at corresponding temperature, is made above-mentioned
Constitution water and the crystallization water in mineral can slowly be deviate from, so that hole caused by decomposition and crystal transfer is retained in blank
It is internal.In addition, mullitization reaction can occur during heat treatment for natural clay rawore, the reaction process is with certain body
Product expansion, to form a certain number of holes in blank internal in-situ.Present embodiment carries out under the conditions of high temperature
Specific heat treatment promotes crystal boundary rate travel, makes the above-mentioned closing of pores that closed pore be formed in situ, so that bulk density be made
The micro- closed pore clay refractory aggregate of light weight low, that apparent porosity is low and closed porosity is high.
The micro- closed pore clay refractory aggregate of light weight prepared by present embodiment is through detecting: bulk density be 1.4 ~
2.2g/cm3, apparent porosity is 2 ~ 10%, and average pore size is 0.1 ~ 1 μm.
Therefore, present embodiment simple process and at low cost；The micro- closed pore clay refractory aggregate tool of prepared light weight
There is the characteristics of apparent porosity is low, closed porosity is high, intensity is high, average pore size is small and high-temperature resistant medium washes away erosion.
Claims (3)
1. a kind of preparation method of the micro- closed pore clay refractory aggregate of light weight, it is characterised in that with 3 ~ 10 DEG C/min of heating rate,
By lumpy clay raw material temperature-gradient method to final temperature to get the micro- closed pore clay refractory aggregate of light weight；
The temperature-gradient method to final temperature is: when temperature rises to 300 DEG C, 400 DEG C, 500 DEG C, 600 DEG C, 800 DEG C, 900 respectively
DEG C, 1100 DEG C and when final temperature, respectively keep the temperature 1 ~ 4 hour；
The final temperature is 1200 ~ 1500 DEG C.
2. the preparation method of the micro- closed pore clay refractory aggregate of light weight according to claim 1, it is characterised in that the bulk
The Al of clay raw material2O3Content is 30 ~ 50wt%.
3. a kind of micro- closed pore clay refractory aggregate of light weight, it is characterised in that the micro- closed pore clay refractory aggregate of the light weight is basis
The micro- closed pore of light weight prepared by the preparation method of the micro- closed pore clay refractory aggregate of light weight described in any one of claim 1 ~ 2
Clay refractory aggregate.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6096126A (en) * | 1998-08-10 | 2000-08-01 | Profile Products L.L.C. | Sports field soil conditioner |
| CN1390185A (en) * | 1999-11-10 | 2003-01-08 | 昂特玛有限公司 | Method for making expanded clay granules and resulting granules |
| CN101492276A (en) * | 2009-02-19 | 2009-07-29 | 广西大学 | Novel clay soil polyporous materials and method of producing the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080179254A1 (en) * | 2007-01-26 | 2008-07-31 | Kauppi Frederick J | Porous ceramics |
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2016
- 2016-10-17 CN CN201610903994.7A patent/CN106478118B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6096126A (en) * | 1998-08-10 | 2000-08-01 | Profile Products L.L.C. | Sports field soil conditioner |
| CN1390185A (en) * | 1999-11-10 | 2003-01-08 | 昂特玛有限公司 | Method for making expanded clay granules and resulting granules |
| CN101492276A (en) * | 2009-02-19 | 2009-07-29 | 广西大学 | Novel clay soil polyporous materials and method of producing the same |
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