CN109206151A - A kind of light thermal-insulation shale brick and preparation method thereof - Google Patents
A kind of light thermal-insulation shale brick and preparation method thereof Download PDFInfo
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- CN109206151A CN109206151A CN201811372938.0A CN201811372938A CN109206151A CN 109206151 A CN109206151 A CN 109206151A CN 201811372938 A CN201811372938 A CN 201811372938A CN 109206151 A CN109206151 A CN 109206151A
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/068—Carbonaceous materials, e.g. coal, carbon, graphite, hydrocarbons
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- C—CHEMISTRY; METALLURGY
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- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/0675—Vegetable refuse; Cellulosic materials, e.g. wood chips, cork, peat, paper
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
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- 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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- 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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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The present invention provides a kind of weight sintered shale bricks to be related to the technical field that solid waste resource recovery utilizes, and according to parts by weight, is prepared by following raw material: 85~95 parts of shale；5~15 parts of municipal sludge；2.7~5.5 parts of pore creating material；Interior coal-fired 3~4 parts；3~10 parts of water；The calorific value of the interior fire coal is 6100~6800 kcal/kg.The present invention makees that the heavy metal in municipal sludge can be solidified using municipal sludge, and the organic matter in sludge can provide energy for the sintering procedure of shale brick；Addition pore creating material can make to generate a large amount of disordered arrangements and each other disconnected hole in shale brick, improve the thermal insulation property of brick body, while can also mitigate brick body self weight.The compression strength of record according to the embodiment, shale brick provided by the invention can reach the requirement of MU5.0, and heat transfer coefficient can reach 0.48w/m2K, bulk density are less than 1.53gcm‑3。
Description
Technical field
The present invention relates to solid waste resource recoveries to utilize technical field more particularly to a kind of shale brick and its preparation side
Method.
Background technique
Municipal sludge is a kind of composition and its complicated non-uniform matter mixture, basic composition is most organic point
Sub- relic, microbial bacterial thallus, inorganic phase particle and colloid etc..The state of municipal sludge mainly between liquid and solid it
Between, the thick liquid that is mixed in the two.
It is filled by stablizing dehydration rear guard life currently, being concentrated mainly on for the processing mode of municipal sludge, is agricultural
With the mode of burning.Sanitary landfills is the major way of current Treatment of Sludge, but there are problems that secondary pollution；Agricultural sludge meeting
So that soil is agglomerated, is unfavorable for permanent land resourceization and utilizes；Sludge incineration processing can achieve the purpose that minimizing, innoxious,
But the cost of sludge incineration processing is very high while can generate a large amount of smoke pollution；Preparing construction material using sludge is that sludge provides
Source by it is a kind of in the way of, be the inexorable trend of sustainable development.Meanwhile the materials for wall that shale brick is novel as one kind,
, moderate strength small with density, energy saving advantage.It is applied to municipal sludge in the preparation of shale brick and also becomes a kind of sludge
The development trend of comprehensive utilization of resources.
Fan Yingru etc. " experimental study that sewage sludge prepares shale sintered brick " one be disclosed herein using municipal sludge,
Shale is the shale brick that raw material is prepared, but the shale brick quality is big, poor thermal insulation property.
Summary of the invention
The purpose of the present invention is to provide a kind of brick body light weight, the sintering shale brick of good heat insulating and its preparation side
Method.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of shale bricks, according to parts by weight, are prepared by the raw material for including following components:
The calorific value of the interior fire coal is 6100~6800 kcal/kg.
Preferably, the pore-creating is calculated as sawdust and/or stalk.
Preferably, the water content of the municipal sludge is 60%~80%.
The present invention also provides the preparation methods of the shale brick, comprising the following steps:
By shale, municipal sludge, pore creating material and interior coal-fired mixing, mixture is obtained；
The mixture and water are mixed successively slightly refined, be aged, being refined, extrusion forming and firing, obtain shale brick.
Preferably, the ageing is to carry out under conditions of constant temperature and humidity；The temperature of the ageing is 10~35 DEG C；It is described
The humidity of ageing is 60~90%；The time of the ageing is 3~5 days.
Preferably, the pressure of the extrusion forming is 20~30MPa, and the time of the extrusion forming is 10~20s.
Preferably, the temperature of the firing is 900~1050 DEG C, and the time of the firing is 60~120min.
Preferably, moisture content of the mixture in the thick refining, ageing and refining process independently is 12~15%.
Preferably, the time slightly refined is 1~3min.
Preferably, the time of the refining is 1~3min.
The present invention provides a kind of shale bricks, according to parts by weight, are prepared by following raw material: 85~95 parts of shale；
5~15 parts of municipal sludge；2.7~5.5 parts of pore creating material；Interior coal-fired 3~4 parts；3~10 parts of water；The calorific value of the interior fire coal is
6100~6800 kcal/kg.The present invention can solidify city dirt using municipal sludge as one of the raw material for preparing shale brick
Heavy metal in mud, meanwhile, the organic matter in sludge can provide energy for the sintering procedure of shale brick；Adding pore creating material can be with
Make to generate a large amount of disordered arrangements and each other disconnected hole in shale brick, improve the thermal insulation property of brick body, at the same also from
Fundamentally mitigate brick body self weight.The compression strength of record according to the embodiment, shale brick provided by the invention can reach MU5.0's
It is required that heat transfer coefficient can reach 0.48w/m2K, bulk density are less than 1.53gcm-3。
Specific embodiment
The present invention provides a kind of shale bricks, according to parts by weight, including are prepared by following raw material:
The calorific value of the interior fire coal is 6100~6800 kcal/kg.
According to parts by weight, the present invention prepares the shale that the raw material of the shale brick includes 85~95 parts, preferably 88~
92 parts；The present invention does not have any special restriction to the source of the shale, using shale well known to those skilled in the art come
Source.
In the present invention, the chemical component of the shale preferably includes silica, aluminium oxide, iron oxide, calcium oxide, oxygen
Change magnesium, sulfur trioxide, sodium oxide molybdena, lost article matter and other impurity can be burnt.In the present invention, the silica accounts for the shale
Mass percentage is preferably 50~60%, and more preferably 52~58%, most preferably 54~56%；In the present invention, described
The mass percentage that aluminium oxide accounts for the shale is preferably 20~30%, more preferably 22~28%, most preferably 24~
26%；In the present invention, it is preferably 2.0~10% that the iron oxide, which accounts for the mass percentage of the shale, more preferably 4~
6%；In the present invention, it is preferably 0.01~0.5% that the calcium oxide, which accounts for the mass percentage of the shale, more preferably
0.2~0.3%；In the present invention, it is preferably 0.1~2.0% that the magnesia, which accounts for the mass percentage of the shale, more excellent
It is selected as 0.5~1.5%, most preferably 0.8~1.2%；In the present invention, the sulfur trioxide accounts for the quality percentage of the shale
Content is preferably 1.0~10.0%, and more preferably 2.0~8.0%, most preferably 4.0~6.0%；In the present invention, the oxygen
Changing sodium to account for the mass percentage of the shale is preferably 0.1~3.0%, and more preferably 1~2%；In the present invention, described can
Burning the organic matter lost to account for the mass percentage of the dry mud is preferably 5~150%, and more preferably 7~12%.
In terms of the parts by weight of shale, the raw material that the present invention prepares the shale brick further includes 5~15 parts of municipal sludge,
Preferably 8~12 parts；In the present invention, the water content of the municipal sludge is preferably 60%~80%, more preferably 61%~
65%；In the present invention, the municipal sludge is preferably in neutrality；The municipal sludge goes the heat of the dry mud obtained after moisture removal
Value is preferably 3000~4000kJkg-1。
In the present invention, the chemical component for the dry mud that the municipal sludge is gone after moisture removal preferably includes silica, oxygen
Change aluminium, iron oxide, calcium oxide, magnesia, sulfur trioxide, sodium oxide molybdena, the organic matter that mistake can be burnt and other impurity.In the present invention
In, the mass percentage that the silica accounts for the dry mud is preferably 15~25%, and more preferably 18~22%；In this hair
In bright, the mass percentage that the aluminium oxide accounts for the dry mud is preferably 5~10%, and more preferably 6~8%, most preferably
6.5~7.5%；In the present invention, the mass percentage that the iron oxide accounts for the dry mud is preferably 1.0~5.0%, more excellent
It is selected as 2.0~4.0%；In the present invention, the mass percentage that the calcium oxide accounts for the dry mud is preferably 1.0~5.0%,
More preferably 2.0~4.0%；In the present invention, the magnesia account for the mass percentage of the dry mud be preferably 2.0~
3.0%, more preferably 2.2~2.8%, most preferably 2.4~2.6%；In the present invention, the sulfur trioxide accounts for the dry mud
Mass percentage be preferably 2.0~3.0%, more preferably 2.2~2.8%, most preferably 2.4~2.6%；In the present invention
In, the mass percentage that the sodium oxide molybdena accounts for the dry mud is preferably 0.1~2.0%, and more preferably 0.5~1.5%；At this
In invention, the mass percentage that the organic matter for burning mistake accounts for the dry mud is preferably 40~50%, more preferably 44~
48%.
In terms of the parts by weight of shale, the raw material that the present invention prepares the shale brick further includes 2.7~5.5 parts of pore-creating
Agent, preferably 3~5 parts, more preferably 3.5~4.5 parts；In the present invention, the pore creating material is preferably sawdust and/or stalk；
When the pore creating material is the mixture of sawdust and stalk, the present invention is no any special to the proportion of the sawdust and stalk
It limits, can be mixed by any proportion.The present invention does not have any special restriction to the type of the sawdust, using this field
Sawdust known to technical staff；The present invention does not have any special restriction to the type of the stalk, using this field skill
Crop material known to art personnel.
In the present invention, the pore creating material can make to generate a large amount of disordered arrangements and mutual non-intercommunicating pore in shale brick
Hole improves the thermal insulation property of brick body, while also fundamentally mitigating brick body self weight, simultaneously because few vector of sludge is higher,
Small stomata can also be generated in brick body after sintered, improves the thermal insulation property of brick body.
In terms of the parts by weight of shale, the raw material that the present invention prepares the shale brick further includes 3~4 parts of interior fire coal, excellent
It is selected as 3.2~3.8 parts, more preferably 3.4~3.6 parts；The calorific value of the interior fire coal is 6100~6800 kcal/kg, preferably
It is 6200~6700 kcal/kg, more preferably 6300~6600 kcal/kg；The present invention does not have the source of the interior fire coal
There is any special restriction, using source well known to those skilled in the art.
In the present invention, the effect of the interior fire coal is so that adobe is fired speed when firing and accelerate and be heated equal
It is even, energy consumption of the product in sintering procedure can be reduced.
In terms of the parts by weight of shale, the raw material that the present invention prepares the shale brick further includes 3~10 parts of water, preferably
5~8 parts, more preferably 6~7 parts.
In the present invention, the effect of the water is to make powder and water molecules to improve pug by adding water and stirring
Plasticity index, facilitate embryo processed.
The present invention also provides the preparation methods of the shale brick, comprising the following steps:
By shale, municipal sludge, pore creating material and interior coal-fired mixing, mixture is obtained；
The mixture is slightly refined, is aged, is refined, extrusion forming and firing, obtains shale brick.
Shale, municipal sludge, pore creating material and interior coal-fired mixing are obtained mixture by the present invention.In the present invention, the page
It rock and interior coal-fired preferably independent be successively crushed, crushed and be sieved using preceding.The present invention does not have the broken and crushing
There is any special restriction, is carried out using broken and crushing process well known to those skilled in the art；In the present invention, institute
It states to be crushed and be carried out preferably in jaw crusher；The crushing preferably carries out in double rod pulverizers.In the present invention, the mistake
Sieve preferably uses the sieve of model 3mm.In the present invention, the pore creating material using it is preceding be preferably successively dried, grinding
And sieving；The present invention any special restriction no to the drying is using drying means well known to those skilled in the art
It can；The present invention does not have any special restriction to the grinding, using grinding method well known to those skilled in the art；?
In the present invention, the sieving preferably uses the sieve of model 0.1mm.
The present invention to the no any special restriction of the mixing, using mixed process well known to those skilled in the art into
Row mixing.
After obtaining mixture, the present invention, which mixes the mixture and water, successively slightly to be refined, is aged, being refined, is squeezed into
Type and firing, obtain shale brick.In the present invention, the moisture content of mixed slurry is preferably 12%~15% after the thick refining, more
Preferably 13%~14%；In the present invention, the mixed time is preferably 1~3min, more preferably 1.5~2min.This
Invention preferably carries out the mixing under stirring conditions, and the present invention does not have any special limit to the condition of the stirring
It is fixed, it is mixed using stirring condition well known to those skilled in the art.
In the present invention, the ageing preferably carries out under conditions of constant temperature and humidity；In the present invention, the ageing
Temperature is preferably 10~35 DEG C, more preferably 15~30 DEG C, most preferably 20~25 DEG C；In the present invention, the ageing is wet
Degree preferably 60~90%, more preferably 65~85%, most preferably 70~80%；In the present invention, the time of the ageing
Preferably 3~5 days, more preferably 3.5~4.5 days.In the present invention, the moisture content of mixed slurry is preferably after the ageing
12%~15%, more preferably 13%~14%.
In the present invention, the purpose of the ageing is to be released the moisture being locked in microbial cell in sludge,
Hydrone and powder adequately merge, and improve the plasticity index of powder, are conducive to the molding of idiosome.
In the present invention, the refining is preferably two-stage screw stirring；The present invention is to two-stage screw stirring without appointing
What special restriction, is carried out using condition known to those skilled in the art.In the present invention, the time of the refining is preferred
For 1~3min, more preferably 1.5~2.5min.In the present invention, the moisture content of mixed slurry is preferably during the pugging
12%~15%, more preferably 13%~14%.
In the present invention, the effect of the refining is to mix powder and water uniformly, controls the aqueous of pug
Rate prevents idiosome after molding from cracking or collapsing in the natural air drying stage because mixing is uneven or moisture content is too low.
In the present invention, the pressure of the extrusion forming is preferably 20~30MPa, more preferably 22~28MPa, most preferably
For 24~26MPa；The time of the extrusion forming is preferably 10~20s, more preferably 12~18s, most preferably 14~16s.
After extrusion forming, the present invention preferably cuts and dries to the idiosome obtained after extrusion forming；The present invention is to institute
The no any special restriction of cutting is stated, the idiosome is cut by ability using cutting process well known to those skilled in the art
The size of shale brick known to field technique personnel；In the present invention, the drying is preferably natural air drying；In the present invention
In, the time of the drying is preferably 60~80h, more preferably 65~75h.
The present invention is preferably first dried before the firing；In the present invention, the temperature of the drying is preferably 200~250
DEG C, more preferably 210~240 DEG C, most preferably 220~230 DEG C；The time of the drying is preferably 10~20h, more preferably
12~18h, most preferably 14~16h.
In the present invention, the temperature of the firing is preferably 900~1050 DEG C, and more preferably 950~980 DEG C；The burning
The time of system is preferably 60~120min, more preferably 80~100min.In the present invention, the firing is preferably in tunnel oven
It carries out.The present invention preferably cools down after firing；In the present invention, the cooling is preferably with kiln natural cooling.
In order to further illustrate the present invention, below with reference to embodiment to shale brick provided by the invention and preparation method thereof into
Row describes in detail, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
Municipal sludge selected by the present embodiment come from Guilin City Qili shop sewage treatment plant, the municipal sludge it is aqueous
Rate is in neutrality between 75~80%, and dewatered sludge calorific value is 3600kJkg-1, wherein the chemical component of dewatered sludge such as 1 institute of table
Show；
Shale selected by the present embodiment come from the Guilin City Yongfu county town Su Qiao black stone ridge village, wherein shale chemistry at
Divide as shown in table 1；
The interior coal-fired jaw crusher that passes through respectively of the shale of 85 parts by weight and 3 parts by weight is crushed and double rod pulverizer powder
After broken, 3mm sieve is crossed, it is spare；
By the rice straw drying of 5 parts by weight, grinding, 0.1mm sieve is crossed, it is spare；
By the municipal sludge of above-mentioned 15 parts by weight, smashed shale, pore creating material and interior coal-fired mixing, mixture is obtained；
Above-mentioned mixture is mixed with the water of 3 parts by weight, is stirred, thick refining is carried out and obtains the mixing slurry that moisture content is 12%
Material；
By the mixed slurry at 25 DEG C, humidity is aged 3 days, pugging 6min under conditions of being 75%, keeps mixed slurry
Moisture content be 14%, squeeze 15s under conditions of 20MPa, obtain idiosome；
The idiosome is cut, after natural air drying 72h, tunnel oven is sent into, first dries 15h under the conditions of 250 DEG C, so
22h is fired under conditions of 950 DEG C afterwards, furnace cooling obtains shale brick.The apparent porosity of the shale brick is 28.5%, body
Product density is 1.53gcm-3, compression strength 6.0MPa, heat transfer coefficient 0.48w/m2·k。
Embodiment 2
Municipal sludge selected by the present embodiment comes from Guilin City Lingui water treatment plant, and the moisture content of the municipal sludge exists
It between 80-85%, is in neutrality, dewatered sludge calorific value is 3500kJkg-1, wherein the chemical component of dewatered sludge is as shown in table 1；
Shale selected by the present embodiment come from the Guilin City Yongfu county town Su Qiao black stone ridge village, wherein shale chemistry at
Divide as shown in table 1；
The interior coal-fired jaw crusher that passes through respectively of the shale of 85 parts by weight and 3 parts by weight is crushed and double rod pulverizer powder
After broken, 3mm sieve is crossed, it is spare；
By the rice straw drying of 5 parts by weight, grinding, 0.1mm sieve is crossed, it is spare；
By the municipal sludge of above-mentioned 15 parts by weight, pretreated shale, pore creating material and interior coal-fired mixing, mixed
Material；
Above-mentioned mixture is mixed with the water of 3 parts by weight, is stirred, thick refining is carried out and obtains the mixing slurry that moisture content is 13.5%
Material；
The mixed slurry is aged 3 days under conditions of 30 DEG C, 80% humidity, 2min is refined, keeps mixed slurry
Moisture content is 14%, squeezes 15s under conditions of 20MPa, obtains idiosome；
The idiosome is cut, after natural air drying 72h, tunnel oven is sent into, first dries 15h under the conditions of 250 DEG C, so
22h is fired under conditions of 950 DEG C afterwards, furnace cooling obtains shale brick.The apparent porosity of the shale brick is 29.6%, body
Product density is 1.61gcm-3, compression strength 6.0MPa, heat transfer coefficient 0.5w/m2·k。
Table 1: the chemical component table of dewatered sludge and shale
As seen from the above embodiment, the shale brick provided by the invention meets the requirement of building energy-saving, apparent density
Low, porosity increases, and heat transfer coefficient is low, and heat insulation effect is good.
Myopia the preferred embodiment of the present invention described above, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of shale brick is prepared by the raw material for including following components according to parts by weight:
The calorific value of the interior fire coal is 6100~6800 kcal/kg.
2. shale brick as described in claim 1, which is characterized in that the pore creating material is sawdust and/or stalk.
3. shale brick as described in claim 1, which is characterized in that the water content of the municipal sludge is 60%~80%.
4. the preparation method of the described in any item shale bricks of claims 1 to 3, comprising the following steps:
By shale, municipal sludge, pore creating material and interior coal-fired mixing, mixture is obtained；
The mixture and water are mixed successively slightly refined, be aged, concise, extrusion forming and firing, obtain shale brick.
5. preparation method as claimed in claim 4, which is characterized in that the ageing carries out under conditions of constant temperature and humidity；Institute
The temperature for stating ageing is 10~35 DEG C；The humidity of the ageing is 60~90%；The time of the ageing is 3~5 days.
6. preparation method as claimed in claim 4, which is characterized in that the pressure of the extrusion forming is 20~30MPa, described
The time of extrusion forming is 10~20s.
7. preparation method as claimed in claim 4, which is characterized in that the temperature of the firing is 900~1050 DEG C, the burning
The time of system is 60~120min.
8. preparation method as claimed in claim 4, which is characterized in that the mixture is in the thick refining, ageing and pugging
Moisture content in journey independently is 12~15%.
9. preparation method as claimed in claim 4, which is characterized in that the time slightly refined is 1~3min.
10. preparation method as claimed in claim 4, which is characterized in that the time of the refining is 1~3min.
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