CN105347813A - Fireproof material for glass kiln furnaces, and preparation method thereof - Google Patents
Fireproof material for glass kiln furnaces, and preparation method thereof Download PDFInfo
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- CN105347813A CN105347813A CN201410412505.9A CN201410412505A CN105347813A CN 105347813 A CN105347813 A CN 105347813A CN 201410412505 A CN201410412505 A CN 201410412505A CN 105347813 A CN105347813 A CN 105347813A
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- glass kiln
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Abstract
The present invention relates to a fireproof material for glass kiln furnaces, and a preparation method thereof. According to the present invention, the method comprises material preparing, molding and firing; the components comprise, by weight, 80-90% of a crushing material adopting zirconium oxide melting re-curing product single crystal series ZrO2 as the main component and the balance of alumina powder, the components are subjected to mixing ball milling to achieve a particle size D50 of 5-15 [mu]m, spray drying granulation is performed, an isostatic molding method is performed, and the temperature change speed within the transition temperature range from the zirconium oxide monoclinic phase to the tetragonal phase is strictly and slowly controlled; and with the technical scheme, the good performance fireproof material can be obtained, has characteristics of uniform and compact structure, no crack, low porosity and good corrosion resistance, is suitable for glass kiln furnaces, does not generate sand in glass and other defects, and further has characteristics of glass production qualification rate improving and glass kiln furnace service life prolonging.
Description
Technical field
The present invention relates to technical field of refractory materials, particularly relate to refractory materials of a kind of suitable glass kiln use and preparation method thereof.
Background technology
Glass furnace refractory materials is in the past roughly divided into sintered refractory and fused refractory.Sintered refractory is because void content is generally about 10%, depart from for bubbling easy during glass furnace and aggregate, and cause glasswork to produce the defect such as bubble, sand grains (defect that the rear journey particulate state of aggregate disengaging enters glasswork and formed), so the significant points of glass furnace can not be used for; General high zirconia sintered refractory, there is the phase in version of oblique crystal and regular crystal in zirconium white, therefore, add Y between 900 DEG C and 1200 DEG C
2o
3, the stablizer such as MgO and CaO, to avoid its phase in version, when high zirconia sintered refractory like this containing stablizer is used on glass furnace, stablizer is dissolved in glass, and stabilizing zirconia is changing into astable zirconium white, and phase in version continues to occur, and cause tissue fragile, occur to occur the defects such as sand grains in glass, therefore, the high zirconia series sinter refractory materials containing stablizer can not be applied on glass furnace.Fused refractory is the refractory materials liquation with electric furnace melting, fully homogenizing, waters and casts from sand mold, become the refractory product of dense structure, crystallization prosperity after cooling curing.The fused refractory that zirconia content is higher, its solidity to corrosion is good, is suitable in glass melting kiln; Such refractory materials is divided into the A1 of zirconia content 33 ~ 41% substantially
2o
3the fused refractory of-ZrO2-SiO2 series and the high zirconia series fused refractory of zirconia content 85 ~ 95%.High zirconia series fused refractory has better solidity to corrosion, low to glass feed liquid contaminative, obtains popularization and application in recent years in high quality glass kiln.But existing high zirconia series refractory materials is because the glassy phase contained is fewer than electric fused zirconium corundum (AZS), speed of cooling difference during casting, have part occur void content high year colyliform tissue shortcoming, sometimes there is the shortcomings such as foaming from this part.The method, fierce raw material granularity slightly can not produce the high zirconia sintered refractory of compact structure, also has not enough compared with Higly oxidized zirconia fused refractory in resistance to glass metal erosion.
Summary of the invention
Refractory materials that the object of the present invention is to provide a kind of suitable glass kiln to use and preparation method thereof, the Higly oxidized zirconia sintered refractory product density produced is high, and solidity to corrosion is strong, low to the contaminative of glass feed liquid, is applicable to being applied on glass furnace.
The preparation method of Higly oxidized zirconia refractory of the present invention, comprises batching, shaping and burn till, it is characterized in that ingredients by weight percentage composition is: 80-90% is with zirconium oxide melting cured article monocrystalline series ZrO again
2for the crushed material of main component and the alumina powder of surplus.Zirconium oxide melting again cured article refers to the astable zirconium white of electric smelting X950.
In order to ensure the characteristic of Higly oxidized zirconia refractory, zirconium oxide melting again cured article monocrystalline series ZrO2 be the chemical weight percentage composition of the crushed material of main component control be: ZrO
285 ~ 95%, SiO
25 ~ 15%, surplus is inevitable dirt.Zirconium oxide melting is cured article monocrystalline series ZrO again
2for the crushed material of main component can synthesize voluntarily, also can directly buy, alumina powder has commercially available prod, directly buys.
Batching mixing and ball milling is reached 5-15um to material particular diameter D50, is conducive to obtaining good compactness, without be full of cracks, reduce void content, below 5%, strengthen solidity to corrosion, reduce the contaminative to glass feed liquid.Ball milling material particular diameter D50 control mode is the smashing fineness phraseology that industry is all known, is meant to the grain diameter of 50% within D50 numerical range.
Ball milling adopts wet ball-milling mode, and adopt polyester rubber ball milling liner, use the zirconium matter mill ball of zirconium white composition more than 90%, grinding medium many employings water also can be other grinding medium, as alcohol etc.
Batching after ball milling is carried out spraying dry and obtain spraying pellet, particle diameter is less than 0.5mm and is suitable for, and according to forming requirements, controls dry moisture content, custom requirements, without particular requirement, generally below 0.5%.Then granule filling is carried out in rubber mold isostatic pressing and obtain work in-process, forming pressure is 150 ~ 300MPa.
Work in-process after shaping are dried at the temperature of 110 ~ 200 DEG C, then carries out high temperature and burn till.In order to avoid changing the disadvantageous effect that the larger volume change brought causes between zirconium white oblique crystal and regular crystal crystalline phase, within the scope of crystal phase transition temperature, temperature variation will control slower, and calcining system controls as follows:
50～1000℃0.3～0.5℃/min:
1000～1200℃0.1～0.2℃/min:
1200～1000℃0.8～1.0℃/min;
1600～1200℃0.7～1.0℃/min:
1200～1000℃0.1～0.2℃/min;
1000～50℃0.3～0.5℃/min。
Product after burning till is carried out Final finishing, after the process such as cutting, grinding, obtains finished product.
Through analysis and research and test of many times, detection prove repeatedly, the technical scheme that the present invention determines can obtain the sintered refractory of superperformance, homogeneous microstructure is fine and close, flawless, void content is low, and solidity to corrosion is good, and suitable glass kiln uses, not easily there is the defects such as the sand grains in glass, the qualification rate of glass production can be improved and extend the work-ing life of glass furnace.The refractory products that preparation method of the present invention produces also can apply other suitable occasion and field.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
Refractory materials that a kind of suitable glass kiln of the present invention uses and preparation method thereof, carries out according to following requirements:
(1) to prepare burden raw materials used chemical weight percentage composition:
Higly oxidized zirconia melting cured article again: ZrO
291.5%, SiO
26.7%, A1
2o
30.95%, Na
2o0.75%.(a-A1
2o
3) alumina powder: A1
2o
398.60%, Na
2o1.40%.
(2) ball milling: by raw material according to 93% with zirconium oxide melting again cured article monocrystalline series ZrO
2for the crushed material of main component and the alumina powder of surplus are prepared burden, batching is put into ultra tiny wet-type ball mill and carry out being uniformly mixed pulverizing, grinding particle size control D50 reaches 3.0um.
(3) granulation: the mud obtained by wet ball-milling carries out dehydration granulation by sponging granulator, granulation material size controlling is less than 0.4mm, and it is 0.4% that the pellet pigment after granulation control.
(4) isostatic pressing: granulation material is filled in rubber mold and carries out isostatic pressing and make work in-process, forming pressure is 220MPa.
(5) dry: work in-process are dried in the drying oven of 110 ~ 150 DEG C.
(6) calcining system is:
50～1000℃0.35℃/min:
1000～1200℃0.1℃/min:
1200～1000℃1.0℃/min;
1600～1200℃1.0℃/min:
1200～1000℃0.2℃/min;
1000～50℃0.3℃/min。
(7) Final finishing: the goods after burning till are carried out cutting, grinding obtained finished product.
Embodiment 2
Refractory materials that a kind of suitable glass kiln of the present invention uses and preparation method thereof, carries out according to following requirements:
L () is prepared burden raw materials used chemical weight percentage composition:
Higly oxidized zirconia melting cured article again: ZrO
291.2%, SiO
26.8%, A1
2o
30.94%, Na
2o0.5%.(a-A1
2o
3) alumina powder: A1
2o
398.70%, Na
2o0.92%.
(2) ball milling: by raw material according to 90% with zirconium oxide melting again cured article monocrystalline series ZrO
2for the crushed material of main component and the alumina powder of surplus are prepared burden, batching is put into ultra tiny wet-type ball mill and carry out being uniformly mixed pulverizing, grinding particle size control D50 reaches 7.8um.
(3) granulation: the mud obtained by wet ball-milling carries out dehydration granulation by sponging granulator, granulation material size controlling is less than 0.35mm, and it is 0.5% that the pellet pigment after granulation control.
(4) isostatic pressing: granulation material is filled in rubber mold and carries out isostatic pressing and make work in-process, forming pressure is 200MPa.
(5) dry: work in-process are dried in the drying oven of 140 ~ 170 DEG C.
(6) calcining system is:
50～1000℃0.4℃/min:
1000～1200℃0.15℃/min:
1200～1000℃0.85℃/min;
1600～1200℃0.9℃/min:
1200～1000℃0.13℃/min;
1000～50℃0.42℃/min。
(7) Final finishing: the goods after burning till are carried out cutting, grinding obtained finished product.
Embodiment 3
Refractory materials that a kind of suitable glass kiln of the present invention uses and preparation method thereof, carries out according to following requirements:
(1) to prepare burden raw materials used chemical weight percentage composition:
Higly oxidized zirconia melting cured article again: ZrO
289.8%, SiO
8.4%, A1
2o
30.95%, Na
2o0.4%.(a-A1
2o
3) alumina powder: A1
2o
398.35%, Na
2o1.32%.
(2) ball milling: by raw material according to 87% with zirconium oxide melting again cured article monocrystalline series ZrO
2for the crushed material of main component and the alumina powder of surplus are prepared burden, batching is put into ultra tiny wet-type ball mill and carry out being uniformly mixed pulverizing, grinding particle size control D50 reaches 5um.
(3) granulation: the mud obtained by wet ball-milling carries out dehydration granulation by sponging granulator, granulation material size controlling is less than 0.3mm, and it is 0.35% that the pellet pigment after granulation control.
(4) isostatic pressing: granulation material is filled in rubber mold and carries out isostatic pressing and make work in-process, forming pressure is 180MPa.
(5) dry: work in-process are dried in the drying oven of 130 ~ 190 DEG C.
(6) calcining system is:
50～1000℃0.5℃/min:
1000～1200℃0.2℃/min:
1200～1000℃0.75℃/min;
1600～1200℃0.92℃/min:
1200～1000℃0.13℃/min;
1000～50℃0.42℃/min。
(7) Final finishing: the goods after burning till are carried out cutting, grinding obtained finished product.
Claims (8)
1. refractory materials of using of a suitable glass kiln and preparation method thereof, comprises batching, shaping and burn till, it is characterized in that ingredients by weight percentage composition is: 80-90% is with the zirconium oxide melting serial ZrO of cured article monocrystalline again
2for the crushed material of main component and the alumina powder of surplus.
2. refractory materials of using of suitable glass kiln according to claim 1 and preparation method thereof, is characterized in that zirconium oxide melting cured article monocrystalline series ZrO again
2for the weight percent of the crushed material of main component consists of: ZrO
285 ~ 95%, SiO
25 ~ 15%.
3. refractory materials of using of suitable glass kiln according to claim 1 and preparation method thereof, is characterized in that batching mixing and ball milling to reach 5-15um to particle diameter D50.
4. refractory materials of using of suitable glass kiln according to claim 3 and preparation method thereof, it is characterized in that shaping after the calcining system of refractory materials be:
50～1000℃0.3～0.5℃/min:
1000～1200℃0.1～0.2℃/min:
1200～1000℃0.8～1.0℃/min;
1600～1200℃0.7～1.0℃/min:
1200～1000℃0.1～0.2℃/min;
1000～50℃0.3～0.5℃/min。
5. refractory materials of using of suitable glass kiln according to claim 4 and preparation method thereof, is characterized in that forming method adopts isostatic pressing method.
6. refractory materials of using of suitable glass kiln according to claim 5 and preparation method thereof, is characterized in that isostatic pressing powder used is the spraying dry pellet after batching ball milling.
7. refractory materials of using of suitable glass kiln according to claim 6 and preparation method thereof, is characterized in that the particle diameter of spraying dry pellet is less than 0.8mm.
8. refractory materials of using of suitable glass kiln according to claim 7 and preparation method thereof, is characterized in that the forming pressure of isostatic pressing is 150 ~ 300MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410412505.9A CN105347813A (en) | 2014-08-21 | 2014-08-21 | Fireproof material for glass kiln furnaces, and preparation method thereof |
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|---|---|---|---|
| CN201410412505.9A CN105347813A (en) | 2014-08-21 | 2014-08-21 | Fireproof material for glass kiln furnaces, and preparation method thereof |
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| CN105347813A true CN105347813A (en) | 2016-02-24 |
Family
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113620704A (en) * | 2021-09-15 | 2021-11-09 | 郑州亿川复合新材料研究所有限公司 | Preparation process of high-zirconium ceramic for special glass molten pool |
-
2014
- 2014-08-21 CN CN201410412505.9A patent/CN105347813A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113620704A (en) * | 2021-09-15 | 2021-11-09 | 郑州亿川复合新材料研究所有限公司 | Preparation process of high-zirconium ceramic for special glass molten pool |
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Application publication date: 20160224 |