CN106083136A - A kind of silicon carbide large size ceramic heat storage and preparation technology thereof - Google Patents
A kind of silicon carbide large size ceramic heat storage and preparation technology thereof Download PDFInfo
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- CN106083136A CN106083136A CN201610426165.4A CN201610426165A CN106083136A CN 106083136 A CN106083136 A CN 106083136A CN 201610426165 A CN201610426165 A CN 201610426165A CN 106083136 A CN106083136 A CN 106083136A
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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
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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
- C04B2235/9669—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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Abstract
A kind of silicon carbide 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, wherein inorganic powder is made up of the component of following weight proportion: carborundum 60 weight portion~70 weight portions, silica flour 10 weight portion~30 weight portions, silicon nitride 5 weight portion~10 weight portions, alumina powder 2 weight portion~8 weight portions, silicon dioxide 2 weight portion~5 weight portions, calcium oxide 1.0 weight portion~2.5 weight portions, boron nitride 1.0 weight portion~2.5 weight portions.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 silicon carbide 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 silicon carbide large size ceramic heat storage and preparation technology thereof, in order to solve existing honeycomb pottery
Porcelain anti-wear 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
Blocking flue, thermal waste are 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 silicon carbide 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: carborundum 60-70
Weight portion, silica flour 10-30 weight portion, silicon nitride 5-10 weight portion, alumina powder 2-8 weight portion, silicon dioxide 2-5 weight
Part, calcium oxide 1.0-2.5 weight portion, boron nitride 1.0-2.5 weight portion.
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.
A kind of silicon carbide large size ceramic heat storage and preparation technology, 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 polyethylene glycol oxide (having another name called poly(ethylene oxide), PEG etc.), polyvinyl alcohol
Compositions.
As preferably, described wetting agent is glycerol, butanediol, propylene glycol, hexylene glycol, xylitol, polypropylene glycol, sorbose
One or more combinations in alcohol.
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 processability and conformal performance.Using inventive formulation and production method, heat storage is strong
Degree height, and 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,
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.After installation permissible
The airflow hole inconsistent phenomenon being greatly decreased between two honeycomb ceramics is the most unimpeded along the passage of airflow direction.And heat storage stores
Exothermicity, anti-wear performance, corrosion resistance and good, thermal shock resistance is good, heat exchange efficiency is high, thus be economize on resources, green
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 silicon carbide 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: carborundum 61
Weight portion, silica flour 11 weight portion, silicon nitride 6 weight portion, alumina powder 3 weight portion, silicon dioxide 3 weight portion, calcium oxide 1.5
Weight portion, boron nitride 1.0 weight portion;(2) doping, additive component is hydroxyethyl cellulose 4 weight portion, polyvinyl alcohol 1
Weight portion, polyethylene glycol oxide 1 weight portion, (PEG400) 2 weight portion;(3) mediate, add while stirring in kneader
Water and lubricating oil, during kneading, after adding 400kg material, divide 5 times while stirring and add water, and water continues stirring 5 minutes and one after adding
Secondary property adds Oleum Verniciae fordii, stops stirring after 20 minutes;(4) just practice, carry out pug just practicing on vacuum deairing machine, pugging when just practicing
Machine vacuum is-0.09MPa, practices into closely knit pug block, and pug block moisture content is 28~32%, extrusion force plasticity be 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 put
Carry out old in the ageing silo that environment is 8 DEG C, old time 26h;(6) refine, filters, then after vacuum extruding machine refine,
It is in-0.09MPa at relative vacuum degree and carries out, then filter through filter;(7) extrusion molding, is extruded at horizontal extruder
The wet base of 750mm length;(8) fumigate 2 hours initially with steam, be then placed in microwave oven, microwave drying 15 minutes, be re-fed into heat
Wind furnace uses hot air drying 1 hour;(9) cutting, sintering: cut blank, then burns till, first in nitridation room
It is 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 from 1400 DEG C
1550~1600 DEG C: programming rate 25 DEG C/min, it is incubated 2.5-3 hour at 1550~1600 DEG C, prepares after firing time 96h
Finished product.
Performance indications: the size of finished product is 150mm × 150mm × 700mm.Resistant to sulfur acid attack rate 0.30wt%(GB/
T17601-2008);Specific heat capacity 858J/Kg;Water absorption rate 4%;Heat shock resistance temperature 460 DEG C;Compressive resistance (axially): 62MPa;Resistance to
Mill property 0.5 cm3.Finished product sectional dimension is big, and draw ratio is high, installs tailing edge airflow direction channels open, and resistance is little, and dust stratification is few.Real
Border uses and shows: because of this, honeycomb ceramic heat accumulator size is big, shape is regular, and after installation, the duct 1 between honeycomb ceramics is to level
Really, as long as along generally 12 pieces honeycomb ceramic heat accumulators series connection of airflow direction it is ensured that airway patency, allow whole regenerative apparatus
Storage exothermicity, high-temperature behavior and thermal shock resistance be not fully exerted.
Embodiment two:
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 6 hours, cross the screen cloth of 80 mesh, inorganic powder is made up of the component of following weight proportion: carborundum 65 weight
Amount part, silica flour 18 weight portion, silicon nitride 7 weight portion, alumina powder 4 weight portion, silicon dioxide 4 weight portion, calcium oxide 2 weight
Part, boron nitride 1.5 weight portion;(2) doping, additive component is methylcellulose 1 weight portion, hydroxyethyl cellulose 1 weight
Amount part, cyanethyl cellulose 3 weight portion, polyvinyl alcohol 1 weight portion, polyethylene glycol oxide 1 weight portion, polypropylene glycol 2 weight portion;
(3) mediate, kneader adds water and lubricating oil while stirring, during kneading, after adding 400kg material, divide 3 times while stirring and add
Entering water, water continues stirring after adding and within 2 minutes, adds Oleum Verniciae fordii at twice, stops stirring after 30 minutes;(4) just practice, by pug very
Carrying out on empty pug mill just practicing, when just practicing, pug mill vacuum is-0.09MPa, practices into closely knit pug block, pug block moisture content
Being 28~32%, extrusion force plasticity is 1700~2200N;(5) old pug block is placed in the ageing silo that environment is 3 DEG C in carry out
Old, old time 5h, then carry out in pug block is placed in the ageing silo that environment is 12 DEG C old, old time 24h;(6) essence
Refining, filters, then after vacuum extruding machine refine, is in-0.08MPa at relative vacuum degree and carries out;(7) extrusion molding, sleeping
Formula extruder is extruded into the wet base of 1050mm length;(8) fumigate 2 hours initially with steam, be then placed in microwave oven, microwave drying 15
Minute, it is re-fed into air stove and uses hot air drying 1 hour;(9) cutting, sintering: cut blank, then in nitridation room
Burn till, be first 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/min, is incubated 2.5-3 hour at 1550~1600 DEG C, when burning till
Between prepare finished product after 96h.
Performance indications: the size of finished product is 150mm × 150mm × 1000mm.Resistant to sulfur acid attack rate 0.32wt%(GB/
T17601-2008);Specific heat capacity 859J/Kg;Water absorption rate 3%;Heat shock resistance temperature 460 DEG C;Compressive resistance (axially): 63MPa;Resistance to
Mill property 0.6 cm3.Finished product sectional dimension is big, and draw ratio is high, installs tailing edge airflow direction channels open, and resistance is little, and dust stratification is few.Real
Border uses and shows: because of this, honeycomb ceramic heat accumulator size is big, shape is regular, and after installation, the duct 1 between honeycomb ceramics is to level
Really, as long as along generally 12 pieces honeycomb ceramic heat accumulators series connection of airflow direction it is ensured that airway patency, allow whole regenerative apparatus
Storage exothermicity, high-temperature behavior and thermal shock resistance be not fully exerted.
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: carborundum 65 weight portion, silica flour 20 weight portion, silicon nitride 8 weight portion, alumina powder 6 weight portion, dioxy
SiClx 4 weight portion, calcium oxide 2 weight portion, boron nitride 2 weight portion;(2) doping, additive component is methylcellulose 2 weight
Amount part, cyanethyl cellulose 3 weight portion, polyvinyl alcohol 1 weight portion, polyethylene glycol oxide 1 weight portion, butanediol 3 weight portion;(3)
Mediate, kneader adds water and lubricating oil while stirring, during kneading, after adding 400kg material, be initially charged after stirring 15min
The water of half, adds the Oleum Brassicae campestris of half after continuing stirring 5 minutes, add remaining water and Oleum Brassicae campestris, after 20 after spending 5 minutes
Stirring is stopped after minute;(4) just practice, carry out pug just practicing on vacuum deairing machine, when just practicing pug mill vacuum be-
0.09MPa, practices into closely knit pug block, and pug block moisture content is 28~32%, and extrusion force plasticity is 1700~2200N;(5) old
Corruption, carries 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 20
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 880mm 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 × 210mm × 800mm.Resistant to sulfur acid attack rate 0.34wt%(GB/
T17601-2008);Specific heat capacity 856J/Kg;Water absorption rate 4%;Heat shock resistance temperature 460 DEG C;Compressive resistance (axially): 62MPa;Resistance to
Mill property 0.7cm3.Finished product sectional dimension is big, and draw ratio is high, installs tailing edge airflow direction channels open, and resistance is little, and dust stratification is few.Real
Border uses and shows: because of this, honeycomb ceramic heat accumulator size is big, shape is regular, and after installation, the duct 1 between honeycomb ceramics is to level
Really, as long as along generally 12 pieces honeycomb ceramic heat accumulators series connection of airflow direction it is ensured that airway patency, allow whole regenerative apparatus
Storage exothermicity, high-temperature behavior and thermal shock resistance be not fully exerted.
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: carborundum 70 weight portion, silica flour 30 weight portion, silicon nitride 10 weight portion, alumina powder 8 weight portion,
Silicon dioxide 5 weight portion, calcium oxide 2.5 weight portion, boron nitride 2.5 weight portion;(2) doping, additive component is methyl
Cellulose 1 weight portion, cyanethyl cellulose 2 weight portion, polyvinyl alcohol 1 weight portion, polyethylene glycol oxide 2 weight portion, (Polyethylene Glycol
400) 3 weight portion;(3) mediate, kneader adds water and lubricating oil while stirring, during kneading, after adding 400kg material, stir
Disposably add water after mixing 20min, after continuing stirring 5 minutes, add all of Oleum Brassicae campestris, after mediating 30 minutes, stop stirring;
(4) just practicing, carry out pug just practicing on vacuum deairing machine, when just practicing, pug mill vacuum is-0.09MPa, practices into closely knit
Pug block, pug block moisture content is 28~32%, and extrusion force plasticity is 1700~2200N;(5) old, pug block is placed in environment
Be carry out in the ageing silo of 3 DEG C old, old time 5h, then carry out in pug block is placed in the ageing silo that environment is 25 DEG C old
Corruption, old time 29h;(6) refine, filters, then after vacuum extruding machine refine, is in-0.06MPa at relative vacuum degree
OK, then through filter filter;(7) extrusion molding, the wet base of 1080mm length it is extruded at horizontal extruder;(8) initially with steam
Stifling 2 hours, 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) cut
Cut, sintering: blank is cut, then burn till in nitridation room, be first 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, prepares finished product after firing time 96h.
Performance indications: the size of finished product is 300mm(diameter d) × 1000mm.Resistant to sulfur acid attack rate 0.34wt%(GB/
T17601-2008);Specific heat capacity 859J/Kg;Water absorption rate 4%;Heat shock resistance temperature 460 DEG C;Compressive resistance (axially): 62MPa;Resistance to
Mill property 0.6 cm3.Finished product sectional dimension is big, and draw ratio is high, installs tailing edge airflow direction channels open, and resistance is little, and dust stratification is few.Real
Border uses and shows: because of this, honeycomb ceramic heat accumulator size is big, shape is regular, and after installation, the duct 1 between honeycomb ceramics is to level
Really, as long as along generally 12 pieces honeycomb ceramic heat accumulators series connection of airflow direction it is ensured that airway patency, allow whole regenerative apparatus
Storage exothermicity, high-temperature behavior and thermal shock resistance be not fully exerted.
Comparative example 1: the production method of novel heat-storing material comprises the following steps:
To ceramic powder (potassium feldspar 25%, mullite 65%, Kaolin 6%, α-Al2032%, boron nitride 2%) 75.5 parts add silicon
Colloidal sol 4 parts, carboxymethyl cellulose 2 parts, ammonium chloride solution 0.2 part, glycerol 2 parts, polyvinyl alcohol 0.4 part, butyl silicate 5 parts, vinegar
Vinyl acetate resin 4 parts and 12 parts of water carry out mixing, make pug;By pug by mould extrusion molding, make blank;By blank
After drying, fire 12 hours in 1400 DEG C in sending into tunnel cave, get 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. a silicon carbide 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: carborundum 60-70 weight portion, silica flour 10-30 weight portion, silicon nitride 5-10 weight portion, aluminium oxide
Micropowder 2-8 weight portion, silicon dioxide 2-5 weight portion, calcium oxide 1.0-2.5 weight portion, boron nitride 1.0-2.5 weight portion.
Silicon carbide 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 silicon carbide 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 silicon carbide 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 silicon carbide 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 silicon carbide 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 silicon carbide 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.
Silicon carbide large size ceramic heat storage the most according to claim 3 and preparation technology, 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。
Silicon carbide 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.
Silicon carbide large size ceramic heat storage the most according to claim 2, is characterized in that described heat storage sidepiece also sets
There is 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 |
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 |
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 |
CN201610425786.0A Withdrawn CN106431383A (en) | 2015-06-27 | 2016-06-16 | Spinel large-specification ceramic heat accumulator 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 |
CN201610426172.4A Withdrawn CN106083138A (en) | 2015-06-27 | 2016-06-16 | A kind of quartziferous large size ceramic heat storage and preparation technology thereof |
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 |
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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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 |
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 |
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CN201610425786.0A Withdrawn CN106431383A (en) | 2015-06-27 | 2016-06-16 | Spinel large-specification ceramic heat accumulator 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 |
CN201610426172.4A Withdrawn CN106083138A (en) | 2015-06-27 | 2016-06-16 | A kind of quartziferous large size ceramic heat storage and preparation technology thereof |
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 |
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 CN201610426736.4A patent/CN106083142A/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 CN201610425786.0A patent/CN106431383A/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 CN201610426172.4A patent/CN106083138A/en not_active Withdrawn
- 2016-06-16 CN CN201610426731.1A patent/CN106083140A/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
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107266079A (en) * | 2016-03-31 | 2017-10-20 | 日本碍子株式会社 | The manufacture method and honeycomb structured body of porous material and porous material |
CN107879752A (en) * | 2017-11-21 | 2018-04-06 | 常州市好利莱光电科技有限公司 | A kind of preparation method of the low apparent porosity honeycomb ceramic heat accumulator of high temperature resistant |
CN117720334A (en) * | 2024-01-30 | 2024-03-19 | 山东奥福环保科技股份有限公司 | High-porosity, thin-wall and high-strength honeycomb ceramic and preparation method and application thereof |
CN117720334B (en) * | 2024-01-30 | 2024-05-14 | 山东奥福环保科技股份有限公司 | High-porosity, thin-wall and high-strength honeycomb ceramic and preparation method and application thereof |
Also Published As
Publication number | Publication date |
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CN104987077A (en) | 2015-10-21 |
CN106083134A (en) | 2016-11-09 |
CN106083142A (en) | 2016-11-09 |
CN106431383A (en) | 2017-02-22 |
CN106083140A (en) | 2016-11-09 |
CN106083135A (en) | 2016-11-09 |
CN106083137A (en) | 2016-11-09 |
CN106083139A (en) | 2016-11-09 |
CN106083138A (en) | 2016-11-09 |
CN106083141A (en) | 2016-11-09 |
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