CN106083134A - A kind of alpha-aluminium oxide matter large size ceramic heat storage and preparation technology thereof - Google Patents
A kind of alpha-aluminium oxide matter large size ceramic heat storage and preparation technology thereof Download PDFInfo
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- CN106083134A CN106083134A CN201610425765.9A CN201610425765A CN106083134A CN 106083134 A CN106083134 A CN 106083134A CN 201610425765 A CN201610425765 A CN 201610425765A CN 106083134 A CN106083134 A CN 106083134A
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- heat storage
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- aluminium oxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
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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
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9692—Acid, alkali or halogen resistance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
A kind of alpha-aluminium oxide matter large size ceramic heat storage, it is characterized in that described heat storage is column structure, the duct of multiple through cylinder it is provided with inside heat storage, described heat storage is sintered by inorganic powder and additive and forms, and wherein inorganic powder is made up of the component of following weight proportion: alpha-aluminium oxide 20 30 parts, silica flour 35 parts, Kaolin 7 13 parts, potassium feldspar 12 20 parts, cordierite 10 20 parts, silicon nitride 8 15 parts, boron nitride 25 parts.The present invention has good processability and conformal performance.Using inventive formulation and production method, heat storage duct is intensive, and wall thickness is thin, and wall thickness is only 1mm, and sectional dimension is big, and sectional dimension is more than 100cm2, draw ratio is high, and length reaches 1000mm, the features such as it is little that all ducts have resistance, and dust stratification is few, is not easily blocked, and dust discharge is functional.
Description
Technical field
The invention belongs to industrial energy saving, emission abatement device field, particularly relate to a kind of alpha-aluminium oxide matter large size ceramic heat storage
And preparation technology.
Background technology
Regenerative combustion technology has obtained extensively application on industrial furnace, and one of its technological core is high-temperature heat accumulation honeycomb
Body.Heat accumulating type ceramic honey comb, due to good storage exothermicity, high-temperature behavior and thermal shock resistance, instead of traditional accumulation of heat
Formula bead, checker brick.During use, make high-temperature flue gas and cryogenic gas (such as air gas) the most in turn by commutation
By heat storage, make heat storage constantly absorb heat heat release, medium as heat exchange, reach the mesh of flue gas and air gas heat exchange
's.Detailed process is: when high-temperature flue gas is by heat storage, heat storage is heated to high temperature, and flue-gas temperature is through being greatly reduced heel row
Putting, now accumulation of heat is in heat storage;After commutation, Cryogenic air or coal gas flow through heat storage from opposite direction, heated paramount
Temperature, heat storage heat release is also lowered the temperature;Again after commutation, flue gas passes through heat storage, is heated by heat storage.So move in circles, it is achieved
The discharged at lower temperature of flue gas and heat energy recycle.
The heat exchange area of ceramic honey comb has direct relation with ceramic honey comb aperture and wall thickness.Ceramic honey comb product aperture is more
Little, wall thickness is the thinnest, surface area is the biggest, and heat exchange area is the biggest, and heat exchange efficiency is the highest.But in application process, there is a lot of reasons
Making heat storage to use, trace it to its cause, the most existing ceramic honey comb formula and processing technology are unreasonable, after causing burning till
Honeycomb ceramics anti-wear performance, decay resistance are the highest, size is little, length is short, aperture compared with big, wall thickness, global shape are irregular, mechanical
Intensity is the highest, the life-span is short.
When honeycomb ceramic body size is little, length in short-term, regenerator is assembled, between honeycomb ceramics by multiple little honeycomb ceramics
There is certain interval.Thus cause that the airflow hole between any two honeycomb ceramics is off and there is serious inconsistent phenomenon.
Dust in flue gas and the particulate matter staggered site deposition between honeycomb ceramics, last blocking airflow through hole.And existing honeycomb
Ceramic body is undesirable because of material, causes heat exchange efficiency to be also affected.
Summary of the invention
The present invention provides a kind of alpha-aluminium oxide matter large size ceramic heat storage and preparation technology thereof, in order to solve existing honeycomb
Ceramic wear-resisting performance, decay resistance are the highest, and shape is irregular, size is little, length is short, aperture is relatively big, wall thickness, during use
Easily block that flue, thermal waste be big, heat changes the technical problems such as efficiency is low, mechanical strength is the highest, the life-span is short.
In order to solve above technical problem, the technical solution used in the present invention is: a kind of alpha-aluminium oxide matter large size ceramic
Heat storage, is characterized in that described heat storage is column structure, is provided with the duct of multiple through cylinder, described accumulation of heat inside heat storage
Body is sintered by inorganic powder and additive and forms, and wherein inorganic powder is made up of the component of following weight proportion: alpha-aluminium oxide 20-
30 parts, silica flour 3-5 part, Kaolin 7-13 part, potassium feldspar 12-20 part, cordierite 10-20 part, silicon nitride 8-15 part, boron nitride
2-5 part, calcium sulfate crystal whiskers 2-5 part.
As preferably, the cross sectional shape of described heat storage is polygon, semicircle, circle, arch, fan-shaped one, institute
The cross sectional shape stating duct is polygon, semicircle, circle, arch, one or more fan-shaped combinations, described heat storage cross section
Circumscribed circle diameter >=150mm, cylinder length and cross section circumscribed circle diameter ratio >=3.
The preparation technology of a kind of alpha-aluminium oxide matter large size ceramic heat storage, its preparation technology is: (1) is dry mixed: first by nothing
Machine powder adds in ball mill, is dry mixed 6~8 hours, crosses the screen cloth of 80 mesh;(2) doping, described additive component includes
Machine binding agent, plasticizer and wetting agent, by 100 parts of listed as parts by weight of inorganic powder, wherein organic binder bond is 2.0~5.0 weights
Amount part, plasticizer is 0.5~3.0 weight portions, and wetting agent is 0.5~3.0 weight portions;(3) mediate, in kneader while stirring
Add water and lubricant;(4) just practice: carry out pug on vacuum deairing machine just practicing, pug mill vacuum when just practicing >=-
0.05MPa, practices into closely knit pug block, detects the moisture content of pug block, index of plasticity;(5) old: pug block is placed in ring
Border be carry out in the ageing silo of 3 DEG C old, old time 5h, then enter in pug block is placed in the ageing silo that environment is 8~25 DEG C
Row is old, old time >=24h;(6) refine filtering: after vacuum extruding machine refine, relative vacuum degree be-
0.09MPa is carried out, then filters through filter;(7) horizontal vacuum extruder for shaping is used;(8) it is dried: initially with steaming
Vapour is fumigated 2 hours, can produce by pre-Anti-cracking, is then placed in microwave oven, microwave drying 15 minutes, is re-fed into air stove and uses heat
Air-dry dry 1 hour;(9) cutting, sintering: cut blank, then burns till, maximum sintering temperature in nitridation room
1600 DEG C, after firing time 96h, prepare finished product.
As preferably, the described process that carries out burning till in nitridation room is: be raised to 1400 DEG C from room temperature, programming rate 50
DEG C/min, it is incubated 2~2.5 hours at 1400 DEG C;Then it is raised to 1550~1600 DEG C from 1400 DEG C: programming rate 25 DEG C/minute
Clock, is incubated 2.5-3 hour at 1550~1600 DEG C.
As preferably, described organic binder bond is methylcellulose, hydroxyethyl cellulose, cyanethyl cellulose, hydroxypropyl
In cellulose, carboxymethyl cellulose, ethyl cellulose, polyvinyl alcohol, butyl silicate, vinyl acetate resin, modified starch one
Plant or multiple combination.
As preferably, described organic plasticizers is the compositions of polyethylene glycol oxide, polyvinyl alcohol.
As preferably, described wetting agent be Polyethylene Glycol, glycerol, butanediol, propylene glycol, hexylene glycol, xylitol, poly-the third two
One or more combinations in alcohol, Sorbitol.
As preferably, described lubricant is one or more combinations of vegetable oil, mineral oil, vaseline.
As preferably, during described step (4) is just practiced, the moisture content of described pug block, index of plasticity be: moisture content 28~
32%, extrusion force plasticity 1700~2200N.
As preferably, described heat storage upper surface is provided with at least one detent, described heat storage lower surface be provided with
The positioning convex strip that detent coordinates.
As preferably, described heat storage sidepiece is additionally provided with axial notch.
Organic binder bond, polyethylene glycol oxide, polyvinyl alcohol, the addition of wetting agent, and the old process of secondary, can allow pottery
Ceramic powder forms mixing pug network the finest and close, uniform.
In dry run, first steam is fumigated 2 hours, can produce by pre-Anti-cracking, is then placed in microwave oven, microwave drying
Air stove can be re-fed into and uses hot air drying 1 hour with overall reduction pug moisture content, it is thus achieved that most suitable moisture content.This
Sample both can prevent wet base from not ftractureing in dry run as far as possible, plays a part again to reduce mud material forming pressure in molding.
The positioning convex strip of honeycomb ceramics coordinates with detent, is possible to prevent airflow hole between two honeycomb ceramics upper and lower end faces wrong
Position phenomenon occurs.The axial notch set up adds somewhat to the heat storage porosity, improves heat storage heat exchanger effectiveness.
The present invention has good molding, conformal performance and prominent mechanical strength property.Use inventive formulation and life
Product method, heat storage duct is intensive, wall thickness is thin, thermal shock resistance is good, and its wall thickness is only 1mm, and sectional dimension is big, sectional dimension
More than 100cm2, draw ratio is high, and length reaches 1000mm, and it is little that all ducts have resistance, and dust stratification is few, is not easily blocked, dust discharge performance
The feature such as good.Airflow hole inconsistent phenomenon two honeycomb ceramics between can be greatly decreased, along the passage of airflow direction after installation
The most unimpeded.And heat storage stores exothermicity, anti-wear performance, corrosion resistance and good, and thermal shock resistance is good, heat exchange efficiency
Height, thus be economize on resources, the novel product of environmental protection.
Accompanying drawing explanation
Shown in Fig. 1 be cross section of the present invention be foursquare structural representation;
Shown in Fig. 2 be cross section of the present invention be rectangle, cross section, duct be hexagonal structural representation;
Shown in Fig. 3 be cross section of the present invention be the structural representation of arch;
Shown in Fig. 4 be cross section of the present invention be trapezoidal structural representation;
Shown in Fig. 5 be cross section of the present invention be rectangle, cross section, duct be foursquare structural representation;
Shown in Fig. 6 be cross section of the present invention be circular structural representation;
It it is structural representation during perpendicular positioning of the present invention shown in Fig. 7;
It it is structural representation during horizontal location of the present invention shown in Fig. 8.
Detailed description of the invention
Below in conjunction with detailed description of the invention, technical scheme is described in further detail.
As shown in Fig. 1,2,3,4,5,6, the cross sectional shape of this alpha-aluminium oxide matter large size ceramic heat storage is square, length
The polygonal one such as square, or the one of the shape such as semicircle, circle, arch, sector.Heat storage sectional dimension >=
150mm, draw ratio >=3(i.e. cylinder length L and cross section circumscribed circle diameter d ratio >=3), be provided with inside heat storage size uniformly and
In parallel or staggered duct 1, the shape in cross section, duct 1 selects according to the actual requirements: can be square, triangle, five
Limit shape, hexagon etc. are polygonal a kind of or semicircle, circular, the combination of one or more various shapes of arch, sector.
As it is shown in fig. 7, heat storage upper surface is provided with at least one detent 2, described heat storage lower surface is provided with fixed
The positioning convex strip 3 that position groove 2 coordinates.Positioning convex strip 3 coordinates with detent 2, can allow upper and lower two pieces of heat storage accurate positionings,
Prevent airflow hole inconsistent phenomenon between two honeycomb ceramics upper and lower end faces from occurring.
Additionally, as shown in Figure 8, also can arrange axial notch 4 at heat storage sidepiece, allow between two honeycomb ceramics is the most recessed
Forming exhaust gases passes after groove 4 docking, this adds somewhat to the heat storage porosity, improves heat storage heat exchanger effectiveness.
Embodiment one:
The large size ceramic heat storage made, cross section is square;Its preparation technology is: (1) is dry mixed, and is first added by inorganic powder
Entering in ball mill, be dry mixed 4 hours, cross the screen cloth of 100 mesh, inorganic powder is made up of the component of following weight proportion: alpha-aluminium oxide 28
Part, silica flour 3 parts, Kaolin 8 parts, silicon nitride 9 parts, potassium feldspar 13 parts, cordierite 11 parts, boron nitride 3 parts, calcium sulfate crystal whiskers 2
Part;(2) doping, additive component is methylcellulose 1 weight portion, cyanethyl cellulose 2 weight portion, polyvinyl alcohol 1 weight
Amount part, polyethylene glycol oxide 1 weight portion, glycerol 2 weight portion;(3) mediate, kneader add water and lubricating oil while stirring,
During kneading, after adding 400kg material, dividing 5 times while stirring and add water, water continues stirring 5 minutes after adding and disposably adds paulownia
Oil, stops stirring after 20 minutes;(4) just practice, carry out pug just practicing on vacuum deairing machine, pug mill vacuum when just practicing
For-0.09MPa, practicing into closely knit pug block, pug block moisture content is 28~32%, and extrusion force plasticity is 1700~2200N;(5)
Old, carry out old in pug block is placed in the ageing silo that environment is 3 DEG C, old time 5h, then pug block is placed in environment is 8
DEG C ageing silo in carry out old, old time 26h;(6) refine, filters, then after vacuum extruding machine refine, in relative vacuum
Degree is in-0.09MPa and carries out, then filters through filter;(7) extrusion molding, is extruded into the wet of 750mm length at horizontal extruder
Base;(8) fumigate 2 hours initially with steam, be then placed in microwave oven, microwave drying 15 minutes, be re-fed into air stove and use heat
Air-dry dry 1 hour;(9) cutting, sintering: cut blank, then burns till in nitridation room, is first raised to from room temperature
1400 DEG C, programming rate 50 DEG C/min, it is incubated 2~2.5 hours at 1400 DEG C;Then it is raised to 1550~1600 from 1400 DEG C
DEG C: programming rate 25 DEG C/min, it is incubated 2.5-3 hour at 1550~1600 DEG C, after firing time 96h, prepares finished product.
Performance indications: the size of finished product is 150mm × 150mm × 700mm.Finished product sectional dimension is big, and draw ratio is high, installs
Tailing edge airflow direction channels open, resistance is little, and dust stratification is few.Actually used show: because this honeycomb ceramic heat accumulator size is big, shape
Shape is regular, and after installation, duct 1 para-position between honeycomb ceramics is accurate, as long as along airflow direction generally 12 pieces of ceramic honey comb accumulation of heats
Body is connected it is ensured that airway patency, allows storage exothermicity, high-temperature behavior and the thermal shock resistance of whole regenerative apparatus obtain
Give full play to.
Embodiment two:
The large size ceramic heat storage made, cross section is rectangle;Its preparation technology is: (1) is dry mixed, and is first added by inorganic powder
Entering in ball mill, be dry mixed 6 hours, cross the screen cloth of 80 mesh, inorganic powder is made up of the component of following weight proportion: alpha-aluminium oxide 24
Part, silica flour 4 parts, Kaolin 10 parts, silicon nitride 10 parts, potassium feldspar 16 parts, cordierite 14 parts, boron nitride 4 parts, calcium sulfate crystal whiskers 5
Part;(2) doping, additive component is hydroxyethyl cellulose 4 weight portion, polyvinyl alcohol 1 weight portion, polyethylene glycol oxide 1 weight
Amount part, (PEG400) 2 weight portion;(3) mediate, kneader adds water and lubricating oil while stirring, during kneading, adds
After entering 400kg material, dividing 3 times while stirring and add water, water continues stirring after adding and within 2 minutes, adds Oleum Verniciae fordii at twice, after 30 minutes
Stop stirring;(4) just practicing, carry out pug just practicing on vacuum deairing machine, when just practicing, pug mill vacuum is-0.08MPa, practices
Becoming closely knit pug block, pug block moisture content is 28~32%, and extrusion force plasticity is 1700~2200N;(5) old by pug block
Carry out old in being placed in the ageing silo that environment is 3 DEG C, old time 5h, then pug block is placed in the ageing silo that environment is 12 DEG C
Carry out old, old time 24h;(6) refine, filters, then after vacuum extruding machine refine, relative vacuum degree be-
0.08MPa is carried out;(7) extrusion molding, is extruded into the wet base of 1050mm length at horizontal extruder;(8) 2 are fumigated initially with steam
Hour, it is then placed in microwave oven, microwave drying 15 minutes, is re-fed into air stove and uses hot air drying 1 hour;(9) cutting, burns
Knot: cut blank, then burns till in nitridation room, is first raised to 1400 DEG C from room temperature, programming rate 50 DEG C/minute
Clock, is incubated 2~2.5 hours at 1400 DEG C;Then it is raised to 1550~1600 DEG C from 1400 DEG C: programming rate 25 DEG C/min,
1550~1600 DEG C are incubated 2.5-3 hour, prepare finished product after firing time 96h.
Performance indications: the size of finished product is 200mm × 150mm × 1000mm.Finished product sectional dimension is big, and draw ratio is high, peace
Dress tailing edge airflow direction channels open, resistance is little, and dust stratification is few.Actually used show: because this honeycomb ceramic heat accumulator size is big,
Shape is regular, and after installation, duct 1 para-position between honeycomb ceramics is accurate, as long as storing along generally 12 pieces ceramic honey combs of airflow direction
Hot body is connected it is ensured that airway patency, allows storage exothermicity, high-temperature behavior and the thermal shock resistance of whole regenerative apparatus obtain
To giving full play to.
Embodiment three:
The large size ceramic heat storage made, cross section is rectangle;Its preparation technology is: (1) is dry mixed, and is first added by inorganic powder
Entering in ball mill, add in ball mill by required powder, be dry mixed 3 hours, cross the screen cloth of 80 mesh, inorganic powder is joined by following weight
The component composition of ratio: alpha-aluminium oxide 25 parts, silica flour 4 parts, Kaolin 11 parts, silicon nitride 11 parts, potassium feldspar 18 parts, cordierite 15
Part, boron nitride 4 parts, calcium sulfate crystal whiskers 3 parts;(2) doping, additive component is methylcellulose 1 weight portion, ethoxy fibre
Tie up plain 3 weight portions, polyvinyl alcohol 1 weight portion, polyethylene glycol oxide 1 weight portion, (PEG400) 2 weight portion;(3) mediate,
Kneader adds water and lubricating oil while stirring, during kneading, after adding 400kg material, after stirring 15min, is initially charged half
Water, adds the Oleum Brassicae campestris of half after continuing stirring 5 minutes, add remaining water and Oleum Brassicae campestris, after 20 minutes after spending 5 minutes
Stop stirring;(4) just practicing, carry out pug just practicing on vacuum deairing machine, when just practicing, pug mill vacuum is-0.08MPa, practices
Becoming closely knit pug block, pug block moisture content is 28~32%, and extrusion force plasticity is 1700~2200N;(5) old, by pug block
Carry out old in being placed in the ageing silo that environment is 3 DEG C, old time 5h, then pug block is placed in the ageing silo that environment is 20 DEG C
Carry out old, old time 26h;(6) refine, filters, then after vacuum extruding machine refine, relative vacuum degree be-
0.09MPa is carried out, then filters through filter;(7) extrusion molding, is extruded into the wet base of 880mm length at horizontal extruder;(8) first
First use steam to fumigate 2 hours, be then placed in microwave oven, microwave drying 15 minutes, be re-fed into air stove and use hot air drying 1 little
Time;(9) cutting, sintering: cut blank, then burns till in nitridation room, is first raised to 1400 DEG C from room temperature, rise
Temperature speed 50 DEG C/min, is incubated 2~2.5 hours at 1400 DEG C;Then it is raised to 1550~1600 DEG C from 1400 DEG C: programming rate
25 DEG C/min, it is incubated 2.5-3 hour at 1550~1600 DEG C, after firing time 96h, prepares finished product.
Performance indications: the size of finished product is 150mm × 135mm × 800mm.Finished product sectional dimension is big, and draw ratio is high, installs
Tailing edge airflow direction channels open, resistance is little, and dust stratification is few.Actually used show: because this honeycomb ceramic heat accumulator size is big, shape
Shape is regular, and after installation, duct 1 para-position between honeycomb ceramics is accurate, as long as along airflow direction generally 12 pieces of ceramic honey comb accumulation of heats
Body is connected it is ensured that airway patency, allows storage exothermicity, high-temperature behavior and the thermal shock resistance of whole regenerative apparatus obtain
Give full play to.
Embodiment four:
The large size ceramic heat storage made, cross section semicircular in shape;Its preparation technology is: (1) is dry mixed, and is first added by inorganic powder
Entering in ball mill, add in ball mill by required powder, be dry mixed 6 hours, cross the screen cloth of 120 mesh, inorganic powder is by following weight
The component composition of proportioning: alpha-aluminium oxide 28 parts, silica flour 5 parts, Kaolin 12 parts, silicon nitride 15 parts, potassium feldspar 20 parts, cordierite 18
Part, boron nitride 5 parts, calcium sulfate crystal whiskers 3 parts;(2) doping, additive component is methylcellulose 3 weight portion, ethoxy fibre
Tie up plain 1 weight portion, cyanethyl cellulose 1 weight portion, polyvinyl alcohol 2 weight portion, polyethylene glycol oxide 1 weight portion, hexylene glycol 2 weight
Part;(3) mediate, kneader adds water and lubricating oil while stirring, during kneading, after adding 400kg material, after stirring 20min
Disposably add water, after continuing stirring 5 minutes, add all of Oleum Brassicae campestris, after mediating 30 minutes, stop stirring;(4) just practice,
Carrying out pug on vacuum deairing machine just practicing, when just practicing, pug mill vacuum is-0.08MPa, practices into closely knit pug block, mud
Material block moisture content is 28~32%, and extrusion force plasticity is 1700~2200N;(5) old, it is 3 DEG C old that pug block is placed in environment
Rotten indoor carry out old, old time 5h, then carry out in pug block is placed in the ageing silo that environment is 25 DEG C old, the old time
29h;(6) refine, filters, then after vacuum extruding machine refine, is in-0.06MPa at relative vacuum degree and carries out, then through filtering
Machine filters;(7) extrusion molding, is extruded into the wet base of 1080mm length at horizontal extruder;(8) 2 hours are fumigated initially with steam, so
After put into microwave oven, microwave drying 15 minutes, be re-fed into air stove and use hot air drying 1 hour;(9) cutting, sintering: to blank
Cut, then burn till in nitridation room, be first raised to 1400 DEG C from room temperature, programming rate 50 DEG C/min,
1400 DEG C are incubated 2~2.5 hours;Then be raised to 1550~1600 DEG C from 1400 DEG C: programming rate 25 DEG C/min, 1550~
1600 DEG C are incubated 2.5-3 hour, prepare finished product after firing time 96h.
Performance indications: the size of finished product is 260mm(diameter) × 1000mm.Finished product sectional dimension is big, and draw ratio is high, installs
Tailing edge airflow direction channels open, resistance is little, and dust stratification is few.Actually used show: because this honeycomb ceramic heat accumulator size is big, shape
Shape is regular, and after installation, duct 1 para-position between honeycomb ceramics is accurate, as long as along airflow direction generally 12 pieces of ceramic honey comb accumulation of heats
Body is connected it is ensured that airway patency, allows storage exothermicity, high-temperature behavior and the thermal shock resistance of whole regenerative apparatus obtain
Give full play to.
Comparative example 1: the production method of novel heat-storing material comprises the following steps:
1) white fused alumina 30 parts, alpha-aluminium oxide 20 parts, Kaolin 15 parts, silica flour 15 parts, 7 parts of Talcum, K-feldspar powder 13 parts are weighed
Pour in powder body batch mixing homogenizer;
2) 3 parts of water are weighed;
3) 0.4 part of Oleum Sesami or other oils and fats are weighed;
4) open powder body batch mixing homogenizer, above-mentioned material is mediated in powder body batch mixing homogenizer, then material is delivered to
Vacuum deairing machine is carried out just practice, old, refine, after extrusion forming, send into microwave dryer sizing, be dried, fire and prepare into
Product.
Ceramic honey comb embodiment 1-4 obtained and existing product carry out contrast test, and experimental result is as shown in the table:
Finally it is pointed out that above detailed description of the invention is only the more representational example of the present invention.Obviously, the present invention does not limits
In above-mentioned detailed description of the invention, it is also possible to there are many deformation.Every technical spirit according to the present invention is to above specific embodiment party
Any simple modification, equivalent variations and the modification that formula is made, is all considered as belonging to protection scope of the present invention.
Claims (10)
1. an alpha-aluminium oxide matter large size ceramic heat storage, is characterized in that described heat storage is column structure, sets inside heat storage
Having the duct of multiple through cylinder, described heat storage is sintered by inorganic powder and additive and forms, and wherein inorganic powder is by following
The component composition of weight proportion: alpha-aluminium oxide 20-30 part, silica flour 3-5 part, Kaolin 7-13 part, potassium feldspar 12-20 part, cordierite
10-20 part, silicon nitride 8-15 part, boron nitride 2-5 part, calcium sulfate crystal whiskers 2-5 part.
Alpha-aluminium oxide matter large size ceramic heat storage the most according to claim 1, is characterized in that the cross section shape of described heat storage
Shape is polygon, semicircle, circle, arch, fan-shaped one, and the cross sectional shape in described duct is polygon, semicircle, circle
Shape, arch, one or more fan-shaped combinations, described heat storage cross section circumscribed circle diameter >=150mm, outside cylinder length is with cross section
Connect circular diameter ratio >=3.
3. produce a preparation technology for alpha-aluminium oxide matter large size ceramic heat storage described in claim 2, it is characterized in that described system
Standby technique is: (1) is dry mixed: first add in ball mill by inorganic powder, is dry mixed 6~8 hours, crosses the screen cloth of 80 mesh;(2) attach
Adding agent, described additive component includes organic binder bond, plasticizer and wetting agent, by 100 parts of listed as parts by weight of inorganic powder, its
Middle organic binder bond is 2.0~5.0 weight portions, and plasticizer is 0.5~3.0 weight portions, and wetting agent is 0.5~3.0 weight portions;
(3) mediate, kneader adds water and lubricant while stirring;(4) just practice: at the beginning of pug is carried out on vacuum deairing machine
Practicing, pug mill vacuum >=-0.05MPa when just practicing, practice into closely knit pug block, the detection moisture content of pug block, plasticity refer to
Mark;(5) old: to carry out old in pug block is placed in the ageing silo that environment is 3 DEG C, old time 5h, then pug block is placed in
Environment be carry out in the ageing silo of 8~25 DEG C old, old time >=24h;(6) refine filtering: through vacuum extruding machine refine
After, it is in-0.09MPa at relative vacuum degree and carries out, then filter through filter;(7) horizontal vacuum extruder is used to be extruded into
Type;(8) it is dried: fumigate 2 hours initially with steam, can produce by pre-Anti-cracking, be then placed in microwave oven, microwave drying 15 points
Clock, is re-fed into air stove and uses hot air drying 1 hour;(9) cutting, sintering: cut blank, then enters in nitridation room
Row burns till, maximum sintering temperature 1600 DEG C, prepares finished product after firing time 96h.
The preparation technology of alpha-aluminium oxide matter large size ceramic heat storage the most according to claim 3, is characterized in that described at nitrogen
Changing the process carrying out burning till in room is: be raised to 1400 DEG C from room temperature, and programming rate 50 DEG C/min is incubated 2~2.5 at 1400 DEG C
Hour;Then it is raised to 1550~1600 DEG C from 1400 DEG C: programming rate 25 DEG C/min, little at 1550~1600 DEG C of insulation 2.5-3
Time.
The preparation technology of alpha-aluminium oxide matter large size ceramic heat storage the most according to claim 3, is characterized in that described organic
Binding agent is methylcellulose, hydroxyethyl cellulose, cyanethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, ethyl fibre
One or more combinations in dimension element, polyvinyl alcohol, butyl silicate, vinyl acetate resin, modified starch.
The preparation technology of alpha-aluminium oxide matter large size ceramic heat storage the most according to claim 3, is characterized in that described organic
Plasticizer is the compositions of polyethylene glycol oxide, polyvinyl alcohol.
The preparation technology of alpha-aluminium oxide matter large size ceramic heat storage the most according to claim 3, is characterized in that described moisturizing
Agent is one or more in Polyethylene Glycol, glycerol, butanediol, propylene glycol, hexylene glycol, xylitol, polypropylene glycol, Sorbitol
Combination;Described lubricant is one or more combinations of vegetable oil, mineral oil, vaseline.
The preparation technology of alpha-aluminium oxide matter large size ceramic heat storage the most according to claim 3, is characterized in that described step
(4) in just practicing, the moisture content of described pug block, index of plasticity be: moisture content 28~32%, extrusion force plasticity 1700~
2200N。
Alpha-aluminium oxide matter large size ceramic heat storage the most according to claim 2, is characterized in that described heat storage upper surface sets
At least one detent, described heat storage lower surface is had to be provided with the positioning convex strip coordinated with detent.
Alpha-aluminium oxide matter large size ceramic heat storage the most according to claim 2, is characterized in that described heat storage sidepiece also
It is provided with axial notch.
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CN201510375899.XA Pending CN104987077A (en) | 2015-06-27 | 2015-06-27 | Novel honeycomb ceramic heat accumulator and preparation technology |
CN201610426731.1A Withdrawn CN106083140A (en) | 2015-06-27 | 2016-06-16 | A kind of large size ceramic heat storage adding chopped fiber and preparation technology thereof |
CN201610425765.9A Withdrawn CN106083134A (en) | 2015-06-27 | 2016-06-16 | A kind of alpha-aluminium oxide matter large size ceramic heat storage and preparation technology thereof |
CN201610426165.4A Withdrawn CN106083136A (en) | 2015-06-27 | 2016-06-16 | A kind of silicon carbide large size ceramic heat storage and preparation technology thereof |
CN201610426736.4A Withdrawn CN106083142A (en) | 2015-06-27 | 2016-06-16 | A kind of aluminum-titanate-based large size ceramic heat storage and preparation technology thereof |
CN201610426172.4A Withdrawn CN106083138A (en) | 2015-06-27 | 2016-06-16 | A kind of quartziferous large size ceramic heat storage and preparation technology thereof |
CN201610425796.4A Withdrawn CN106083135A (en) | 2015-06-27 | 2016-06-16 | A kind of metallic large size ceramic heat storage and preparation technology thereof |
CN201610426182.8A Withdrawn CN106083139A (en) | 2015-06-27 | 2016-06-16 | A kind of TiC matter large size ceramic heat storage and preparation technology thereof |
CN201610425786.0A Withdrawn CN106431383A (en) | 2015-06-27 | 2016-06-16 | Spinel large-specification ceramic heat accumulator and preparation technology thereof |
CN201610426734.5A Withdrawn CN106083141A (en) | 2015-06-27 | 2016-06-16 | A kind of zirconium oxide large size ceramic heat storage and preparation technology thereof |
CN201610426171.XA Withdrawn CN106083137A (en) | 2015-06-27 | 2016-06-16 | A kind of spodumene matter large size ceramic heat storage and preparation technology thereof |
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CN201610426731.1A Withdrawn CN106083140A (en) | 2015-06-27 | 2016-06-16 | A kind of large size ceramic heat storage adding chopped fiber and preparation technology thereof |
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CN201610426165.4A Withdrawn CN106083136A (en) | 2015-06-27 | 2016-06-16 | A kind of silicon carbide large size ceramic heat storage and preparation technology thereof |
CN201610426736.4A Withdrawn CN106083142A (en) | 2015-06-27 | 2016-06-16 | A kind of aluminum-titanate-based large size ceramic heat storage and preparation technology thereof |
CN201610426172.4A Withdrawn CN106083138A (en) | 2015-06-27 | 2016-06-16 | A kind of quartziferous large size ceramic heat storage and preparation technology thereof |
CN201610425796.4A Withdrawn CN106083135A (en) | 2015-06-27 | 2016-06-16 | A kind of metallic large size ceramic heat storage and preparation technology thereof |
CN201610426182.8A Withdrawn CN106083139A (en) | 2015-06-27 | 2016-06-16 | A kind of TiC matter large size ceramic heat storage and preparation technology thereof |
CN201610425786.0A Withdrawn CN106431383A (en) | 2015-06-27 | 2016-06-16 | Spinel large-specification ceramic heat accumulator and preparation technology thereof |
CN201610426734.5A Withdrawn CN106083141A (en) | 2015-06-27 | 2016-06-16 | A kind of zirconium oxide large size ceramic heat storage and preparation technology thereof |
CN201610426171.XA Withdrawn CN106083137A (en) | 2015-06-27 | 2016-06-16 | A kind of spodumene matter large size ceramic heat storage and preparation technology thereof |
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2015
- 2015-06-27 CN CN201510375899.XA patent/CN104987077A/en active Pending
-
2016
- 2016-06-16 CN CN201610426731.1A patent/CN106083140A/en not_active Withdrawn
- 2016-06-16 CN CN201610425765.9A patent/CN106083134A/en not_active Withdrawn
- 2016-06-16 CN CN201610426165.4A patent/CN106083136A/en not_active Withdrawn
- 2016-06-16 CN CN201610426736.4A patent/CN106083142A/en not_active Withdrawn
- 2016-06-16 CN CN201610426172.4A patent/CN106083138A/en not_active Withdrawn
- 2016-06-16 CN CN201610425796.4A patent/CN106083135A/en not_active Withdrawn
- 2016-06-16 CN CN201610426182.8A patent/CN106083139A/en not_active Withdrawn
- 2016-06-16 CN CN201610425786.0A patent/CN106431383A/en not_active Withdrawn
- 2016-06-16 CN CN201610426734.5A patent/CN106083141A/en not_active Withdrawn
- 2016-06-16 CN CN201610426171.XA patent/CN106083137A/en not_active Withdrawn
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Also Published As
Publication number | Publication date |
---|---|
CN106083142A (en) | 2016-11-09 |
CN106083141A (en) | 2016-11-09 |
CN106083138A (en) | 2016-11-09 |
CN106083137A (en) | 2016-11-09 |
CN106083139A (en) | 2016-11-09 |
CN106083136A (en) | 2016-11-09 |
CN106083135A (en) | 2016-11-09 |
CN106431383A (en) | 2017-02-22 |
CN104987077A (en) | 2015-10-21 |
CN106083140A (en) | 2016-11-09 |
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