CN106083142A

CN106083142A - A kind of aluminum-titanate-based large size ceramic heat storage and preparation technology thereof

Info

Publication number: CN106083142A
Application number: CN201610426736.4A
Authority: CN
Inventors: 吴道君; 周守洪; 李军营; 姜朝兴; 杨晓波
Original assignee: Hubei Shenwu Thermal Energy Technology Co Ltd; Beijing Shenwu Power Technology Co Ltd
Current assignee: Beijing Shenwu Environmental and Energy Technology Co Ltd; Hubei Shenwu Thermal Energy Technology Co Ltd; Beijing Shenwu Power Technology Co Ltd
Priority date: 2015-06-27
Filing date: 2016-06-16
Publication date: 2016-11-09
Also published as: CN106083141A; CN106083135A; CN106083134A; CN106083138A; CN106083136A; CN106083140A; CN106431383A; CN106083137A; CN104987077A; CN106083139A

Abstract

A kind of aluminum-titanate-based 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: aluminium titanates 30 50 parts, Al₂O₃40 50 parts, mullite 38 parts, zirconium oxide 39 parts, silicon nitride 24 parts, boron nitride 35 parts, silica flour 39 parts, niobium pentaoxide 13 parts, lanthana 13 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

A kind of aluminum-titanate-based large size ceramic heat storage and preparation technology thereof

Technical field

The invention belongs to industrial energy saving, emission abatement device field, particularly relate to a kind of aluminum-titanate-based 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 aluminum-titanate-based 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 aluminum-titanate-based 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 includes that the component of following weight proportion forms: aluminium titanates 30-50 part, Al₂O₃40-50 part, mullite 3-8 part, zirconium oxide 3-9 part, silicon nitride 2-4 part, boron nitride 3-5 part, silica flour 3-9 Part.

As preferably, described inorganic powder also has the component of following weight proportion: niobium pentaoxide 1-3 part, lanthana 1-3 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 aluminum-titanate-based 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 processability and conformal performance.Using inventive formulation and production method, heat storage resists Thermal shock and compressive property highlight, 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, and length is up to more than 1000mm, and it is little that all ducts have resistance, and dust stratification is few, is not easily blocked, dust-exhausting property Can well wait feature.Airflow hole inconsistent phenomenon two honeycomb ceramics between can be greatly decreased, leading to along airflow direction after installation Road is the most unimpeded.And heat storage stores exothermicity, anti-wear performance, corrosion resistance and good, heat exchange efficiency is high, thus is to save money Source, 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 aluminum-titanate-based large size ceramic heat storage is square, rectangular The polygonal one such as shape, 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: aluminium titanates 31 Part, Al₂O₃41 parts, mullite 4 parts, zirconium oxide 4 parts, silicon nitride 2 parts, boron nitride 3 parts, silica flour 3 parts；(2) doping, adds Adding agent composition is methylcellulose 2 weight portion, hydroxyethyl cellulose 1 weight portion, cyanethyl cellulose 1 weight portion, polyvinyl alcohol 1 Weight portion, polyethylene glycol oxide 1 weight portion, propylene glycol 2 weight portion；(3) mediate, kneader adds water and lubrication while stirring Oil, during kneading, after adding 400kg material, divides 5 times while stirring and adds water, and water continues stirring 5 minutes after adding and disposably adds Oleum Verniciae fordii, 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, the duct para-position between honeycomb ceramics is accurate, as long as along airflow direction generally 12 pieces of honeycomb ceramic heat accumulators Series connection, it is ensured that airway patency, allows storage exothermicity, high-temperature behavior and the thermal shock resistance of whole regenerative apparatus be filled Distribution is waved.

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: aluminium titanates 33 Part, Al₂O₃42 parts, mullite 5 parts, zirconium oxide 5 parts, silicon nitride 3 parts, boron nitride 4 parts, silica flour 6 parts；(2) doping, adds Agent composition is methylcellulose 3 weight portion, cyanethyl cellulose 1 weight portion, polyvinyl alcohol 2 weight portion, polypropylene glycol 2 weight Part；(3) mediate, kneader adds water and lubricating oil while stirring, during kneading, after adding 400kg material, divide 3 while stirring Secondary addition 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 Carrying out just practicing on vacuum deairing machine, when just practicing, pug mill vacuum is-0.08MPa, practices into closely knit pug block, and pug block contains Water rate is 28～32%, and extrusion force plasticity is 1700～2200N；(5) old pug block is placed in the ageing silo that environment is 3 DEG C 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) refine, filters, then after vacuum extruding machine refine, is in-0.08MPa at relative vacuum degree and carries out；(7) extrusion molding, The wet base of 1050mm length it is extruded at horizontal extruder；(8) fumigating 2 hours initially with steam, be then placed in microwave oven, microwave is done Dry 15 minutes, it is re-fed into air stove and uses hot air drying 1 hour；(9) cutting, sintering: cut blank, then in nitridation Room is burnt till, is 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, burn Finished product is prepared after one-tenth time 96h.

Performance indications: the size of finished product is 150mm × 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: aluminium titanates 35 parts, Al₂O₃45 parts, mullite 6 parts, zirconium oxide 5 parts, silicon nitride 4 parts, boron nitride 4 parts, silicon 6 parts of powder；(2) doping, additive component is hydroxyethyl cellulose 5 weight portion, polyvinyl alcohol 2 weight portion, polyethylene glycol oxide 1 Weight portion, (PEG400) 3 weight portion；(3) mediate, kneader adds water and lubricating oil while stirring, during kneading, After adding 400kg material, it is initially charged the water of half after stirring 15min, after continuing stirring 5 minutes, adds the Oleum Brassicae campestris of half, cross 5 points Add remaining water and Oleum Brassicae campestris after clock, after 20 minutes, stop stirring；(4) just practice, pug is enterprising at vacuum deairing machine Row is just practiced, and when just practicing, pug mill vacuum is-0.08MPa, practices into closely knit pug block, and pug block moisture content is 28～32%, squeezes Plasticity of exerting oneself is 1700～2200N；(5) old, carry out old, time old in pug block is placed in the ageing silo that environment is 3 DEG C Between 5h, then carry out in pug block is placed in the ageing silo that environment is 20 DEG C old, old time 26h；(6) refine, filters, then warp After vacuum extruding machine refine, it is in-0.09MPa at relative vacuum degree and carries out, then filter through filter；(7) extrusion molding, Horizontal extruder is extruded into the wet base of 880mm length；(8) fumigate 2 hours initially with steam, be then placed in microwave oven, microwave drying 15 minutes, it is re-fed into air stove and uses hot air drying 1 hour；(9) cutting, sintering: cut blank, then in nitridation room In burn till, be first raised to 1400 DEG C from room temperature, programming rate 50 DEG C/min, 1400 DEG C be incubated 2～2.5 hours；So After be raised to 1550～1600 DEG C from 1400 DEG C: programming rate 25 DEG C/min, 1550～1600 DEG C be incubated 2.5-3 hour, burn till Finished product is prepared after time 96h.

Performance indications: the size of finished product is 200mm × 150mm × 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: aluminium titanates 38 parts, Al₂O₃49 parts, mullite 8 parts, zirconium oxide 9 parts, silicon nitride 3 parts, boron nitride 5 parts, Silica flour 9 parts, lanthana 2 parts, niobium pentaoxide 2 parts；(2) doping, additive component is methylcellulose 3 weight portion, hydroxyl Ethyl cellulose 1 weight portion, polyvinyl alcohol 2 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, disposable after stirring 20min Add water, after continuing stirring 5 minutes, add all of Oleum Brassicae campestris, after mediating 30 minutes, stop stirring；(4) just practice, by pug Carrying out just practicing on vacuum deairing machine, when just practicing, pug mill vacuum is-0.08MPa, practices into closely knit pug block, and pug block contains Water rate is 28～32%, and extrusion force plasticity is 1700～2200N；(5) old, pug block is placed in the ageing silo that environment is 3 DEG C 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, 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 filter mistake Filter；(7) extrusion molding, is extruded into the wet base of 1080mm length at horizontal extruder；(8) fumigate 2 hours initially with steam, then put Enter microwave oven, microwave drying 15 minutes, be re-fed into air stove and use hot air drying 1 hour；(9) cutting, sintering: blank is carried out Cutting, then burns till in nitridation room, is first raised to 1400 DEG C from room temperature, and programming rate 50 DEG C/min, at 1400 DEG C It is incubated 2～2.5 hours；Then it is raised to 1550～1600 DEG C from 1400 DEG C: programming rate 25 DEG C/min, at 1550～1600 DEG C It is incubated 2.5-3 hour, after firing time 96h, prepares finished product.

Performance indications: the size of finished product is 300mm (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.

Embodiment five:

The large size ceramic heat storage made, cross section is circular；Its preparation technology is: (1) is dry mixed, and is first added by inorganic powder In ball mill, adding in ball mill by required powder, be dry mixed 6 hours, cross the screen cloth of 120 mesh, inorganic powder is joined by following weight The component composition of ratio: aluminium titanates 38 parts, Al₂O₃49 parts, mullite 8 parts, zirconium oxide 9 parts, silicon nitride 3 parts, boron nitride 5 parts, silicon 9 parts of powder, lanthana 2.8 parts, niobium pentaoxide 2.8 parts；(2) doping, additive component be methylcellulose 3 weight portion, Hydroxyethyl cellulose 1 weight portion, polyvinyl alcohol 2 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 20min once Property add water, continue stirring 5 minutes after add all of Oleum Brassicae campestris, after mediating 30 minutes stop stirring；(4) just practice, by mud Material carries out just practicing on vacuum deairing machine, and when just practicing, pug mill vacuum is-0.08MPa, 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 the ageing silo that environment is 3 DEG C Inside 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, 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 filter mistake Filter；(7) extrusion molding, is extruded into the wet base of 1080mm length at horizontal extruder；(8) fumigate 2 hours initially with steam, then put Enter microwave oven, microwave drying 15 minutes, be re-fed into air stove and use hot air drying 1 hour；(9) cutting, sintering: blank is carried out Cutting, then burns till in nitridation room, is first raised to 1400 DEG C from room temperature, and programming rate 50 DEG C/min, at 1400 DEG C It is incubated 2～2.5 hours；Then it is raised to 1550～1600 DEG C from 1400 DEG C: programming rate 25 DEG C/min, at 1550～1600 DEG C It is incubated 2.5-3 hour, after firing time 96h, prepares finished product.

Comparative example 1: the production method of novel heat-storing material comprises the following steps:

1) white fused alumina 25 parts, alpha-aluminium oxide 15 parts, Kaolin 20 parts, silica flour 10 parts, 6.5 parts of Talcum, potassium feldspar 5 parts, nitrogen are weighed Change boron 5 parts, barium carbonate powder 3.5 parts, pour in powder body batch mixing homogenizer (Yi Neng Science and Technology Ltd. of Zhengzhou City product)；

2) 2.5 parts of water are weighed；

3) 0.4 part of Oleum Verniciae fordii is 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 drying machine sizing, be dried, fire prepared finished 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

1. an aluminum-titanate-based 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, wherein inorganic powder include with The component composition of lower weight proportion: aluminium titanates 30-50 part, Al₂O₃40-50 part, mullite 3-8 part, zirconium oxide 3-9 part, nitridation Silicon 2-4 part, boron nitride 3-5 part, silica flour 3-9 part.

Aluminum-titanate-based large size ceramic heat storage the most according to claim 1, it is characterized in that described inorganic powder also have with The component of lower weight proportion: niobium pentaoxide 1-3 part, lanthana 1-3 part.

Aluminum-titanate-based large size ceramic heat storage the most according to claim 1 and 2, is characterized in that the cross section of described heat storage Being shaped as polygon, semicircle, circle, arch, fan-shaped one, 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.

4. prepare a preparation technology for aluminum-titanate-based large size ceramic heat storage described in claim 3, 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 aluminum-titanate-based large size ceramic heat storage the most according to claim 4, 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 aluminum-titanate-based large size ceramic heat storage the most according to claim 4, 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 aluminum-titanate-based large size ceramic heat storage the most according to claim 4, is characterized in that described organic Plasticizer is the compositions of polyethylene glycol oxide, polyvinyl alcohol；Described wetting agent be Polyethylene Glycol, glycerol, butanediol, propylene glycol, One or more combinations in hexylene glycol, xylitol, polypropylene glycol, Sorbitol；Described lubricant be vegetable oil, mineral oil, One or more combinations of vaseline.

The preparation technology of aluminum-titanate-based large size ceramic heat storage the most according to claim 4, 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。

Aluminum-titanate-based large size ceramic heat storage the most according to claim 3, 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.

Aluminum-titanate-based large size ceramic heat storage the most according to claim 3, is characterized in that described heat storage sidepiece also sets There is axial notch.