CN101255062B - Low-cost energy-saving high heat-shake resistant kiln appliance and preparation method thereof - Google Patents
Low-cost energy-saving high heat-shake resistant kiln appliance and preparation method thereof Download PDFInfo
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- CN101255062B CN101255062B CN2008100156508A CN200810015650A CN101255062B CN 101255062 B CN101255062 B CN 101255062B CN 2008100156508 A CN2008100156508 A CN 2008100156508A CN 200810015650 A CN200810015650 A CN 200810015650A CN 101255062 B CN101255062 B CN 101255062B
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Abstract
The invention relates to a low-cost, energy-saving kiln furniture with high thermal shock resistance and a preparation method for products thereof, belonging to the technical field of refractory materials. The invention is mainly for products like saggers with a crystal phase composition by weight as follows: 10.21-58.29% of cordierite crystal phase, 11.5-40% of mullite and 30-51.51% of liquid phase and with a chemistry composition by weight as follows: 40.3-52% of SiO2, 34-48% of Al2O3, 0.29-0.95% of Fe2O3, 0.18-1.36% of TiO2, 0.25-0.77% of CaO, 6.18-13% of MgO and 0.1-2.01% of KNaO. The products are produced by the following steps in turn: burdening, wet ball-milling and fine grinding, iron removing and screening, mud filtering, vacuum mud refining, rolling molding or pulp-slip casting and sintering with reducing flame. The products with high strength and good thermal shock resistance are provided with a long service life and a low application cost and the preparation method is scientific, simple and easy.
Description
Technical field
The present invention relates to a kind of low cost, energy-conservation, high heat-shake resistant kiln appliance and preparation method thereof, belong to technical field of refractory materials, be primarily aimed at products such as saggar.
Background technology
In the domestic ceramics industry, be applicable to the kiln furniture materials such as saggar below 1300 ℃, present domestic trichroite lightweight grog refractory, its preparation technology is after utilizing wedding agent and grog to add the water mixing, through vacuum pugging, moulding, carrying out oxydizing flame again burns till, these material access times only 60～90 times, the thermal shock resistance in later stage sharply descends, and kiln furnitures begin phenomenon to occur bursting, causes ceramic product the slag defective to occur falling, the pug preparation is dealt with improperly again, very easily cause the pollution to the biscuit ware product, these two defectives directly influence the ceramic product quality and reach more than 10%, and saggar weak strength, certainly will strengthen the wall thickness of saggar goods, both increase the raw material use cost, the energy is burnt till in waste again.External existing mullite-cordierite kiln furniture report, its access times have only 60～80 times, not as good as domestic kiln furnitures product.
Summary of the invention
The object of the present invention is to provide a kind of low cost, energy-conservation, high heat-shake resistant kiln appliance, the intensity height, thermal shock resistance is good, long service life, use cost is low; The present invention provides scientific and reasonable, simple preparation method simultaneously.
Low cost of the present invention, energy-conservation, high heat-shake resistant kiln appliance, its crystalline phase weight percent consists of: trichroite crystalline phase 10.21～58.29%, mullite crystalline phase 11.5～40% and liquid phase 30～51.51%.
The invention belongs to trichroite, mullite crystalline phase system, from MgO-Al
2O
3-SiO
2Searched out trichroite and mullite crystalline phase best joint in the phasor, the trichroite crystalline phase is more relatively, and the mullite crystalline phase is moderate, has improved access times significantly, can reduce raw materials cost, and save energy increases the service life.
Its chemical weight percentage composition is: SiO
240.3 Al～52%,
2O
334～48%, Fe
2O
30.29 TiO～0.95%,
20.18～1.36%, CaO 0.25～0.77%, MgO 6.18～13% and KNaO 0.1～2.01%.
Its ingredients by weight percentage composition is: Laiwu clay 5～15%, Mashan soil 9～20%, north county clay 20～40%, ripe flint clay 10～35%, lane clay 10～20%, green coke jewel 10～35% and talcum 10～30%.
The preparation method that it is scientific and reasonable, simple, comprise batching, moulding and burn till, it is characterized in that successively through batching, wet ball grinding fine grinding, except that iron sieves, pass through filter mud, vacuum pugging, roll forming or blowing injection forming again after, burn till through reducing flame again and make.
The present invention has thoroughly removed the thicker high alumina of particle, utilize the daily-use fine production technique to make kiln furnitures, roll forming technology is arranged: successively through batching, wet ball grinding, remove that iron sieves, blowing, filter mud, vacuum pugging, old after, roll forming, after passing through repaired biscuit, drying again, burn till through the high temperature reduction flame; Slip-casting shaping process is arranged: successively through batching, wet ball grinding, remove that iron sieves, the moulding of blowing post slip-casting, pass through repaired biscuit, drying again after, burn till through reducing flame high temperature.
Among the present invention, control proportion material particle diameter is less than 0.5mm, and wherein particle diameter accounts for 55～78% less than the raw material of 10 μ m, helps obtaining the new crystalline phase binding site of trichroite and mullite, the saggar kiln furnitures that obtained performance is good.The raw material grating of present domestic kiln furnitures preparation control is: particle diameter 1～2.5mm account for 25%, particle diameter 0.5～1mm account for 25%, particle diameter accounts for 50% less than 0.5mm's.
The present invention can burn till with oxydizing flame, but performance not as reducing flame burn till good, so, change original oxydizing flame and burn till to reducing flame burns till (conventional general knowledge control), calcining system is as follows:
Go into kiln---1020～1050 ℃ of oxydizing flame (free oxygen level 4～10%)
1020～1050 ℃---1200～1220 ℃ heavy reducing flame (CO content 4～6% O
2Content＜1%)
1200～1220 ℃---reducing flame (CO content 2～3%) a little less than 1330～1335 ℃
Be incubated cooling in 2～3 hours.
Facts have proved that saggar kiln furnitures product of the present invention has the following advantages:
＜1〉utilize the production technique of daily-use fine to make, adopt reducing atmosphere once sintered, goods have reached half porcelainization or near the porcelain state, the liquid content height, and trichroite-mullite crystalline phase is grown more complete, and the product thermal shock resistance is good, and intensity is big.
＜2〉because the later stage thermal shock resistance is good, and the coefficient of expansion is low, 2.7～3.26 * 10
-6/ ℃, in 1310～1300 ℃ of scopes, access times reach more than 300 times, are more than 3～4 times of present domestic ceramics industry kiln furnitures access times, are more than 4～5 times of external mullite-a cordierite kiln furniture.
＜3〉owing to taked the raw material fine grinding, remove that iron sieves, reducing flame burns till novel process, this kiln furnitures life-time service does not fall the saggar chip, can not cause the slag defective; The mechanical iron spot overwhelming majority in the blank removes the Fe in the pug
2O
3Be reduced to FeO, can have thoroughly solved because of the pollution problem of kiln furnitures iron spot to ceramic product, the only reduction of this binomial defective can be improved the quality of products more than 10%.
＜4〉because the raising of access times, can make enterprise not change the saggar kiln furnitures in 1 year, cooperate in the blank and do not add high alumina, can reduce use cost more than 30%.
＜5〉because the intensity height can be made into the thin-walled saggar, thickness can reduce 1/5～1/4, can increase the transfer efficiency of heat, be used in combination the raising of number of times, but save energy is more than 25%.
＜6〉the existing kiln furnitures of regional domestic ceramics enterprise to the north of China the Changjiang river be can substitute fully, refractory slab, support etc. comprised, remarkable benefit.
Preparation method of the present invention is scientific and reasonable, and is simple.
Embodiment
The invention will be further described below in conjunction with embodiment.
Raw materials used chemical weight percentage composition sees Table 1.
Table 1, raw materials used chemical weight percentage composition table
Embodiment 1
Low cost of the present invention, energy-conservation, high heat-shake resistant kiln appliance, its ingredients by weight percentage composition is: Laiwu clay 6%, Mashan soil 10%, north county clay 28%, ripe flint clay 21%, lane clay 10%, green coke jewel 13% and talcum 12%.
Its crystalline phase weight percent consists of: trichroite crystalline phase 40%, mullite crystalline phase 25% and liquid phase 35%.
The preparation method:
Sieve through batching, wet ball grinding fine grinding, deironing successively, pass through filter mud, vacuum pugging, roll forming or blowing injection forming again after, burn till through reducing flame again and make.
Proportion material control particle diameter is less than 0.5mm, and wherein particle diameter accounts for 60% of total raw material weight less than the raw material of 10 μ m.
Calcining system is as follows:
Go into kiln---1040 ℃ of oxydizing flame
1040 ℃---1210 ℃ heavy reducing flames
1210 ℃---reducing flame a little less than 1330 ℃
Be incubated cooling in 2.5 hours
The production control method that other uses daily-use fine repeats no more.
Embodiment 2
Low cost of the present invention, energy-conservation, high heat-shake resistant kiln appliance, its ingredients by weight percentage composition is: Laiwu clay 5%, Mashan soil 11%, north county clay 22%, ripe flint clay 12%, lane clay 12%, green coke jewel 18% and talcum 20%.
Its crystalline phase weight percent consists of: trichroite crystalline phase 42%, mullite crystalline phase 26% and liquid phase 32%.
The preparation method:
Successively through batching, wet ball grinding fine grinding, except that iron sieves, pass through filter mud, vacuum pugging, roll forming or blowing injection forming again after, burn till through reducing flame again and make.
Proportion material control particle diameter is less than 0.5mm, and wherein particle diameter accounts for 70% of total raw material weight less than the raw material of 10 μ m.
Calcining system is as follows:
Go into kiln---1040 ℃ of oxydizing flame
1040 ℃---1220 ℃ heavy reducing flames
1220 ℃---reducing flame a little less than 1335 ℃
Be incubated cooling in 2 hours
The production control method that other uses daily-use fine repeats no more.
Embodiment 3
Low cost of the present invention, energy-conservation, high heat-shake resistant kiln appliance, its ingredients by weight percentage composition is: Laiwu clay 8%, Mashan soil 15%, north county clay 20%, ripe flint clay 16%, lane clay 10%, green coke jewel 17 and talcum 14%.
Its crystalline phase weight percent consists of: trichroite crystalline phase 25%, mullite crystalline phase 32% and liquid phase 43%.
The preparation method:
Successively through batching, wet ball grinding fine grinding, except that iron sieves, pass through filter mud, vacuum pugging, roll forming or blowing injection forming again after, burn till through reducing flame again and make.
Proportion material control particle diameter is less than 0.5mm, and wherein particle diameter accounts for 57% of total raw material weight less than the raw material of 10 μ m.
Calcining system is as follows:
Go into kiln---1020 ℃ of oxydizing flame
1020 ℃---1200 ℃ heavy reducing flames
1200 ℃---reducing flame a little less than 1335 ℃
Be incubated cooling in 3 hours
The production control method that other uses daily-use fine repeats no more.
Embodiment 4
Low cost of the present invention, energy-conservation, high heat-shake resistant kiln appliance, its ingredients by weight percentage composition is: Laiwu clay 12%, Mashan soil 16%, north county clay 22%, ripe flint clay 18%, lane clay 10%, green coke jewel 12% and talcum 10%.
Its crystalline phase weight percent consists of: trichroite crystalline phase 22%, mullite crystalline phase 28% and liquid phase 50%.
The preparation method:
Successively through batching, wet ball grinding fine grinding, except that iron sieves, pass through filter mud, vacuum pugging, roll forming or blowing injection forming again after, burn till through reducing flame again and make.
Proportion material control particle diameter is less than 0.5mm, and wherein particle diameter accounts for 60% of total raw material weight less than the raw material of 10 μ m.
Calcining system is as follows:
Go into kiln-1050 ℃ oxydizing flame
1050 ℃---1220 ℃ heavy reducing flames
1220 ℃---reducing flame a little less than 1335 ℃
Be incubated cooling in 2 hours
The production control method that other uses daily-use fine repeats no more.
Embodiment 5
Low cost of the present invention, energy-conservation, high heat-shake resistant kiln appliance, its chemical weight percentage composition is: SiO
247%, Al
2O
340%, Fe
2O
30.49%, TiO
20.85%, CaO 0.65%, MgO 10.89% and KNaO 0.12%.
Its crystalline phase weight percent consists of: trichroite crystalline phase 42%, mullite crystalline phase 23% and liquid phase 35%.
The preparation method:
Successively through batching, wet ball grinding fine grinding, except that iron sieves, pass through filter mud, vacuum pugging, roll forming or blowing injection forming again after, burn till through reducing flame again and make.
Proportion material control particle diameter is less than 0.5mm, and wherein particle diameter accounts for 63% of total raw material weight less than the raw material of 10 μ m.
Calcining system is as follows:
Go into kiln---1030 ℃ of oxydizing flame
1030 ℃---1220 ℃ heavy reducing flames
1220 ℃---reducing flame a little less than 1330 ℃
Be incubated cooling in 2.5 hours
The production control method that other uses daily-use fine repeats no more.
Claims (2)
1. a low cost, energy-conservation, high heat-shake resistant kiln appliance is characterized in that its crystalline phase weight percent consists of: trichroite crystalline phase 10.21～58.29%, mullite crystalline phase 11.5～40% and liquid phase 30～51.51%;
Its chemical weight percentage composition is: SiO
240.3 Al～52%,
2O
334～48%, Fe
2O
30.29 TiO～0.95%,
20.18～1.36%, CaO 0.25～0.77%, MgO 6.18～13% and KNaO 0.1～2.01%;
Its ingredients by weight percentage composition is: Laiwu clay 5～15%, Mashan soil 9～20%, north county clay 20～40%, ripe flint clay 10～35%, lane clay 10～20%, green coke jewel 10～35% and talcum 10～30%.
2. the preparation method of the described low cost of claim 1, energy-conservation, high heat-shake resistant kiln appliance, comprise batching, moulding and burn till, it is characterized in that successively sieving through batching, wet ball grinding fine grinding, except that iron, after passing through filter mud, vacuum pugging, roll forming or blowing injection forming again, burn till through reducing flame again and make, wherein:
The proportion material particle diameter is less than 0.5mm, and wherein particle diameter accounts for 55～78% less than the raw material of 10 μ m;
Calcining system is as follows:
Go into kiln---1020～1050 ℃ of oxydizing flame
1020～1050 ℃---1200～1220 ℃ heavy reducing flames
1200～1220 ℃---reducing flame a little less than 1330～1335 ℃
Be incubated cooling in 2～3 hours.
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|---|---|---|---|
| CN2008100156508A CN101255062B (en) | 2008-03-29 | 2008-03-29 | Low-cost energy-saving high heat-shake resistant kiln appliance and preparation method thereof |
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|---|---|---|---|
| CN2008100156508A CN101255062B (en) | 2008-03-29 | 2008-03-29 | Low-cost energy-saving high heat-shake resistant kiln appliance and preparation method thereof |
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| CN101255062A CN101255062A (en) | 2008-09-03 |
| CN101255062B true CN101255062B (en) | 2011-06-22 |
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|---|---|---|---|
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102381883B (en) * | 2011-07-29 | 2014-02-19 | 兴化市华伦达铸钢有限公司 | Method for preparing ceramic inner cylinder hanging tile |
| CN103383192B (en) * | 2013-05-14 | 2014-12-31 | 潮州市荣昌陶瓷工艺实业有限公司 | Method for producing sagger product by waste saggers |
| CN109095891A (en) * | 2018-09-07 | 2018-12-28 | 刘淑臣 | The method for making ceramic mold pug as raw material using coal ash and its ceramics being made |
| CN109081687B (en) * | 2018-09-26 | 2021-07-16 | 景德镇陶瓷大学 | High thermal shock resistance ceramic crucible suitable for calcining lithium battery anode material and preparation method thereof |
| CN112209624B (en) * | 2019-07-11 | 2023-03-31 | 广东金意陶陶瓷集团有限公司 | Foamed ceramic with high thermal stability and fire resistance and preparation method thereof |
| CN111233497A (en) * | 2020-02-27 | 2020-06-05 | 辽宁科技大学 | Method for synthesizing cordierite refractory raw material by solid-phase reaction sintering method |
| CN113773067B (en) * | 2021-11-11 | 2022-01-18 | 长沙中瓷新材料科技有限公司 | Sagger based on cordierite and production process thereof |
-
2008
- 2008-03-29 CN CN2008100156508A patent/CN101255062B/en not_active Expired - Fee Related
Non-Patent Citations (3)
| Title |
|---|
| 张文丽，陈嘉庚.陶瓷窑具用堇青石基质料的研究.耐火材料28 3.1994,28(3),143-146. |
| 张文丽,陈嘉庚.陶瓷窑具用堇青石基质料的研究.耐火材料28 3.1994,28(3),143-146. * |
| 王铁军.莫来石-堇青石复相耐火材料的制备及机理研究.河北理工学院硕士学位论文.2003,20、21、22、39、40、44、. * |
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