CN1169744C - Formular and process for preparing heat-accumulating ceramic balls and honeycomb body - Google Patents
Formular and process for preparing heat-accumulating ceramic balls and honeycomb body Download PDFInfo
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- CN1169744C CN1169744C CNB011052740A CN01105274A CN1169744C CN 1169744 C CN1169744 C CN 1169744C CN B011052740 A CNB011052740 A CN B011052740A CN 01105274 A CN01105274 A CN 01105274A CN 1169744 C CN1169744 C CN 1169744C
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- raw material
- ceramic balls
- honeycomb
- sio
- gatch
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Abstract
The present invention relates to a raw material formula and a forming process of heat accumulation ceramic balls and honeycomb bodies for heat accumulation devices. According to weight percentages, the raw material formula comprises 40 to 70% of cordierite, 5 to 15% of sillimanite, 10 to 20% of andalusite and 15 to 35% of zirconite. The forming process adopts a hot-press slurry forming process. The product performance of the present invention is superior to the existing common alumina balls, and the forming process is suitable for producing ceramic balls and ceramic honeycomb bodies.
Description
The present invention relates to a kind of heat accumulating element and production technique thereof that is used for heat accumulating burner capable, the composition of raw materials and the moulding process of particularly a kind of preparing heat-accumulating ceramic balls and honeycomb.
As everyone knows, heat accumulating burner capable is made up of heat-accumulating burner, heat storage and four-way change-over valve etc.Heat storage plays accumulation of heat and exothermic effects, and it settles heat accumulating element to constitute by metal shell.Heat accumulating element has two kinds of Ceramic Balls and ceramic honeycomb bodies.
The stupalith that U.S. Pat P4598054 has introduced a kind of honeycomb is mixed and made into by 20～80% trichroite powder and 20～80% solid solution crystallization phases powders, and its Chemical Composition is: SiO
215.7～44%, Al
2O
329.8～41.9%, Fe
2O
30.9～8.3%, TiO
270～35.9% and MgO4.9～16.1%.Wherein contain Fe
2O
3Too high, easily slagging scorification; TiO
2Content increases raw materials cost greatly up to 35.9%.Extensively adopt the common alumina balls of manual assembly in many middle-size and small-size metallurgical enterprises, its water-cooled number of times (resistance to thermal shocks index) only has 12～18 times.
The object of the present invention is to provide the composition of raw materials and the moulding process of a kind of preparing heat-accumulating ceramic balls and honeycomb, improve the product performance of heat accumulating element, both be applicable to the production ceramic heat-storing sphere, be applicable to the production ceramic honeycomb body again.
For achieving the above object, the present invention adopts following technical proposals:
The composition of raw materials of a kind of preparing heat-accumulating ceramic balls and honeycomb is characterized in that by weight percentage, and composition of raw materials is: trichroite 40～50%, sillimanite 5～15%, andaluzite 10～15%, zircon 15～35%, mullite 5～10% and kaolin 2～8%.
The chemical ingredients of above-mentioned raw materials is by weight percentage:
Trichroite: Al
2O
333～36%, MgO12～16%, SiO
248～52%, Fe
2O
3≤ 0.5%;
Sillimanite: Al
2O
353～57%, SiO
238～42%, Fe
2O
3≤ 1.0%;
Andaluzite: Al
2O
356～60%, SiO
235～40%, Fe
2O
3≤ 1.5%;
Zircon ZrO
260～65%, SiO
230～35%, Al
2O
3≤ 1.0%.
Mullite: Al
2O
370～72%, SiO
226～28%, Fe
2O
3≤ 1.0%;
Kaolin: Al
2O
335～38%, SiO
246～50%, Fe
2O
3≤ 1.5%.
The moulding process of a kind of above-mentioned preparing heat-accumulating ceramic balls and honeycomb is characterized in that processing step is: (1) feedstock production: each raw material is formed and is finely ground to particle diameter≤0.0645mm respectively, forms by selected proportioning each raw material after with fine grinding then and mixes; (2) in 120 ℃ baking oven, dry by the fire powder; (3) and wax to make gatch standby; (4) gatch hot die-casting molding; (5) biscuiting dewaxing; (6) sintering.
In the above-mentioned raw materials step of preparation process, the ballstone that the raw material fine grinding is used is 95
#Pottery, the ratio of raw material and ballstone are 1: 1.2～1.8; Each raw material is formed when mixing, and adds 0.2～0.4% oleic acid by weight, mixing and ball milling 2.5～3.5 hours; The baking powder time is 3.5～4.5 hours in 120 ℃ of baking ovens.
The above-mentioned gatch processing step of making is: paraffin is endured to more than 160 ℃, and the wax ratio is 14～18%, adds 0.4～0.8% oleic acid, places on the paraffin mixer with raw material to stir fast, is cooled to gatch.
Above-mentioned gatch hot die-casting molding processing step is: gatch is heated to about 70 ℃ and stirred at a slow speed 0.8～1.2 hour after the fusing, is added to the casting machine slurry bucket of 65～70 ℃ of insulations, under 0.5～0.8MPa air pressure, die cast, slurry-feeding hole is repaiied in the demoulding after 5 seconds, rejects not enough product.
Above-mentioned biscuiting dewaxing technique step is: the blank of hot die-casting molding is is fully mixed and stirred sorbent material, in the auxiliary high alumina alms bowl of packing into, through 1000～1100 ℃ of biscuitings 50～70 hours, get rid of the paraffin wedding agent, remove sorbent material behind the kiln discharge; The sintering process step is: the work in-process after dewaxing treatment, go into kiln in the saggar of packing into, and at 1350 ± 20 ℃ of following sintering, be incubated 3～5 hours postcooling kiln discharges.
Above-mentioned inspection after construction technology step is: by kiln is that the heat-shock resistance test is carried out in unit sample, if 90% sample thermal shock number 〉=35 time are arranged, then this batch product is salable product, and refractoriness, load softening point, volume density, specific heat and the thermal conductivity of testing product according to a conventional method.
The present invention compared with prior art, have following outstanding feature and remarkable advantage: it is main raw material that the raw material of (1) product of the present invention adopts trichroite, sillimanite and the andaluzite that thermal expansivity is little and heat impact strength is good, make this product resistance to heat shocks can be much better than common alumina balls, the common alumina balls number of times of anti-the rapid heat cycle is 12～18 times, and the product number of times of anti-rapid heat cycle of the present invention 〉=35 times even up to 60 times.The specific heat capacity of product of the present invention will be higher than common alumina balls, when temperature is 1200 ℃, and the Cp=0.2672Kcal/kg of high aluminium ball ℃, and product of the present invention is surveyed Cp=0.299Kcal/kg ℃.Product of the present invention is applicable to 1000～1200 ℃ of hot conditionss uses, especially is suitable for doing the high-temperature heat accumulation element in the Regenerative Combustion Technology.(2) product of the present invention is hot pressing slurry molding, and its cold crushing strength is far above the common alumina balls of rolling moulding.Ceramic Balls of the present invention and honeycomb all rely on mould compression moulding, and the product size tolerance range is more much higher than common alumina balls, and this product sphere diameter tolerance only is ± 0.2mm, and common aluminum oxide sphere diameter tolerance is ± 1.5mm.The present invention both had been applicable to the production Ceramic Balls, also was applicable to the production ceramic honeycomb body, and except moulding mould difference, composition of raw materials and production technique are just the same, and the raw material of alumina balls and production technique only are suitable for producing the thermal storage ceramic ball, can not make honeycomb.
Embodiment:
The preparing heat-accumulating ceramic balls that this is routine and the composition of raw materials of honeycomb are trichroite 50%, sillimanite 10%, andaluzite 15%, zircon 15%, mullite 6% and kaolin 4% by weight percentage.The quality of raw material is its chemical ingredients of control, and the chemical ingredients of promptly controlling raw material is by weight percentage: trichroite: Al
2O
333～36%, MgO12～16%, SiO
248～52%, Fe
2O
a≤ 0.5%; Sillimanite: Al
2O
353～57%, SiO
238～42%, Fe
2O
a≤ 1.0%; Andaluzite: Al
2O
356～60%, SiO
235～40%, Fe
2O
3≤ 1.5%; Zircon ZrO
260～65%, SiO
230～35%, Al
2O
3≤ 1.0%; Mullite: Al
2O
370～72%, SiO
226～28%, Fe
2Oa≤1.0%; Kaolin: Al
2O
335～38%, SiO
246～50%, Fe
2Oa≤1.5%;
The moulding process of this preparing heat-accumulating ceramic balls and honeycomb is: undertaken by following processing step: (1) feedstock production: each raw material composition is finely ground to particle diameter≤0.0645mm respectively, and the ballstone that the raw material fine grinding is used is 95
#Pottery, the ratio of raw material and ballstone are 1: 1.5; Form by selected proportioning each raw material after with fine grinding and to mix, add 0.3% oleic acid by weight, mixing and ball milling 3 hours; (2) dry by the fire powder in 120 ℃ of baking ovens, the baking powder time is 4 hours.(3) and wax to make gatch standby: paraffin is endured to more than 160 ℃, and the wax ratio is 16%, adds 0.6% oleic acid, places on the paraffin mixer with raw material to stir fast, is cooled to gatch.(4) gatch hot die-casting molding: gatch is heated to about 70 ℃ and stirred at a slow speed 1 hour after the fusing, is added to the casting machine slurry bucket of 65～70 ℃ of insulations, under the 0.6MPa air pressure, and die cast, slurry-feeding hole is repaiied in the demoulding after 5 seconds, rejects not enough product.(5) biscuiting dewaxing: the blank of hot die-casting molding is is fully mixed and stirred sorbent material, in the auxiliary high alumina alms bowl of packing into,, get rid of the paraffin wedding agent, remove sorbent material behind the kiln discharge through 1100 ℃ of biscuitings 60 hours.(6) sintering: the work in-process after dewaxing treatment, go into kiln in the saggar of packing into, at 1350 ± 20 ℃ of following sintering, be incubated 4 hours postcooling kiln discharges.(7) inspection after construction: after rejecting the outward appearance unacceptable product, by kiln is unit, heat-shock resistance test (1100 ℃ of water-cooleds or air-cooled) is done in sampling, 100 samples of each sampling are divided into 2 parts, a test, portion keeps sample, after tested, if 90% sample thermal shock number 〉=35 time are arranged, then this batch product is qualified.And refractoriness, load softening point, volume density, specific heat and the thermal conductivity of test products according to a conventional method.
The result is as follows after tested for this routine product: resistance to thermal shocks number of times (being heated to 1100 ℃ of water-cooleds)＞35 times, and refractoriness is 1730 ℃, and apparent porosity is 33.9%, and volume density is 1.97g/cm
3, normal temperature ultimate compression strength is: φ 20mm ball 6520N, φ 16mm ball 5940N, φ 10mm ball 4520N.Its thermal conductivity, thermal diffusivity and its specific heat see the following form:
| Experimental temperature (℃) | Thermal conductivity λ (W/mK) | Thermal diffusivity a (centimetre 2/ second) | Specific heat Cp kcal/kg ℃ | |
| 100 | 0.920 | 0.00610 | 0.205 | |
| 200 | 0.984 | 0.00573 | 0.234 | |
| 300 | 1.0 | 0.00548 | 0.249 | |
| 400 | 1.013 | 0.00536 | 0.258 | |
| 500 | 1.021 | 0.00524 | 0.266 | |
| 600 | 1.030 | 0.00519 | 0.271 | |
| 700 | 1.038 | 0.00515 | 0.275 | |
| 800 | 1.047 | 0.00513 | 0.278 | |
| 900 | 1.067 | 0.00511 | 0.285 | |
| 1000 | 1.083 | 0.00510 | 0.290 | |
| 1100 | 1.097 | 0.00509 | 0.294 | |
| 1200 | 1.114 | 0.00508 | 0.299 |
Claims (6)
1. the composition of raw materials of preparing heat-accumulating ceramic balls and honeycomb is characterized in that by weight percentage,
Composition of raw materials is:
Trichroite 40～50%,
Sillimanite 5～15%,
Andaluzite 10～15%,
Zircon 15～35%,
Mullite 5～10%,
Kaolin 2～8%;
The chemical ingredients of raw material is by weight percentage:
Trichroite: Al
2O
333～36%, MgO12～16%, SiO
248～52%, Fe
2O
3≤ 0.5%;
Sillimanite: Al
2O
353～57%, SiO
238～42%, Fe
2O
3≤ 1.0%;
Andaluzite: Al
2O
356～60%, SiO
235～40%, Fe
2O
3≤ 1.5%;
Zircon: ZrO
260～65%, SiO
230～35%, Al
2O
3≤ 1.0%;
Mullite: Al
2O
370～72%, SiO
226～28%, Fe
2O
3≤ 1.0%;
Kaolin: Al
2O
335～38%, SiO
246～50%, Fe
2O
3≤ 1.5%.
2. one kind is used for the preparing heat-accumulating ceramic balls of the described composition of raw materials of claim 1 and the moulding process of honeycomb, it is characterized in that processing step is: (1) feedstock production: each raw material is formed and is finely ground to particle diameter≤0.0645mm respectively, forms by selected proportioning each raw material after with fine grinding then and mixes; (2) in 120 ℃ of baking ovens, dry by the fire powder; (3) and wax to make gatch standby; (4) gatch hot die-casting molding; (5) biscuiting dewaxing; (6) sintering.
3. according to the moulding process of described preparing heat-accumulating ceramic balls of claim 2 and honeycomb, it is characterized in that in the feedstock production processing step that the ballstone that the raw material fine grinding is used is the 95# pottery, the ratio of raw material and ballstone is 1: 1.2～1.8; Each raw material is formed when mixing, and adds 0.2～0.4% oleic acid by weight, mixing and ball milling 2.5～3.5 hours; The baking powder time is 3.5～4.5 hours in 120 ℃ of baking ovens.
4. according to the moulding process of described preparing heat-accumulating ceramic balls of claim 2 and honeycomb, it is characterized in that making the gatch processing step with wax is: paraffin is endured to more than 160 ℃, the wax ratio is 14～18%, the oleic acid of adding 0.4～0.8%, place on the paraffin mixer with raw material to stir fast, be cooled to gatch.
5. according to the moulding process of described preparing heat-accumulating ceramic balls of claim 2 and honeycomb, it is characterized in that gatch hot die-casting molding processing step is: gatch is heated to about 70 ℃ and stirred at a slow speed 0.8～1.2 hour after the fusing, be added to the casting machine slurry bucket of 65～70 ℃ of insulations, under 0.5～0.8MPa air pressure, die cast, slurry-feeding hole is repaiied in the demoulding after 5 seconds, rejects not enough product.
6. according to the moulding process of described preparing heat-accumulating ceramic balls of claim 2 and honeycomb, it is characterized in that biscuiting dewaxing technique step is: the blank of hot die-casting molding is is fully mixed and stirred sorbent material, pack into and assist in the high alumina alms bowl, through 1000～1100 ℃ of biscuitings 50～70 hours, get rid of the paraffin wedding agent, remove sorbent material behind the kiln discharge; The sintering process step is: the work in-process after dewaxing treatment, go into kiln in the saggar of packing into, and at 1350 ± 20 ℃ of following sintering, be incubated 3～5 hours postcooling kiln discharges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011052740A CN1169744C (en) | 2001-01-22 | 2001-01-22 | Formular and process for preparing heat-accumulating ceramic balls and honeycomb body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011052740A CN1169744C (en) | 2001-01-22 | 2001-01-22 | Formular and process for preparing heat-accumulating ceramic balls and honeycomb body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1316400A CN1316400A (en) | 2001-10-10 |
| CN1169744C true CN1169744C (en) | 2004-10-06 |
Family
ID=4654358
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011052740A Expired - Fee Related CN1169744C (en) | 2001-01-22 | 2001-01-22 | Formular and process for preparing heat-accumulating ceramic balls and honeycomb body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042609B (en) * | 2009-10-21 | 2013-03-06 | 上海锅炉厂有限公司 | Rotary high-temperature air preheater |
| US11845243B2 (en) | 2014-12-19 | 2023-12-19 | Dow Global Technologies Llc | Multilayer structure, a method of producing the same, and a packaging comprising the same |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009076985A1 (en) * | 2007-12-17 | 2009-06-25 | Imerys Services | Ceramic honeycomb structures |
| CN101857447B (en) * | 2010-06-01 | 2012-05-23 | 刘光文 | Andalusite honeycomb heat accumulator and preparation method |
| CN101829572B (en) * | 2010-06-01 | 2011-10-19 | 刘光文 | Engine tail gas catalyzed honeycomb carrier taking andalusite as principal component and preparation method |
| CN102910929A (en) * | 2011-08-04 | 2013-02-06 | 晋城市富基新材料股份有限公司 | Cordierite-mullite honeycomb ceramic heat accumulator and preparation method thereof |
| US10557393B2 (en) * | 2016-10-24 | 2020-02-11 | Ngk Insulators, Ltd. | Porous material, honeycomb structure, and method of producing porous material |
| US11365665B2 (en) | 2016-10-24 | 2022-06-21 | Ngk Insulators, Ltd. | Porous material, honeycomb structure, and method of producing porous material |
| US11428138B2 (en) | 2016-10-24 | 2022-08-30 | Ngk Insulators, Ltd. | Porous material, honeycomb structure, and method of producing porous material |
-
2001
- 2001-01-22 CN CNB011052740A patent/CN1169744C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042609B (en) * | 2009-10-21 | 2013-03-06 | 上海锅炉厂有限公司 | Rotary high-temperature air preheater |
| US11845243B2 (en) | 2014-12-19 | 2023-12-19 | Dow Global Technologies Llc | Multilayer structure, a method of producing the same, and a packaging comprising the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1316400A (en) | 2001-10-10 |
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Granted publication date: 20041006 Termination date: 20140122 |