CN109336575A - One kind re-sintering electric cast mullite brick and preparation method thereof containing zirconium - Google Patents

One kind re-sintering electric cast mullite brick and preparation method thereof containing zirconium Download PDF

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CN109336575A
CN109336575A CN201811257748.4A CN201811257748A CN109336575A CN 109336575 A CN109336575 A CN 109336575A CN 201811257748 A CN201811257748 A CN 201811257748A CN 109336575 A CN109336575 A CN 109336575A
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containing zirconium
micro mist
mullite brick
sinter
temperature
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张晓峰
孙文礼
李玉强
张瑛
李志军
史永鹏
李凯
李芳�
王倩倩
杨舒琪
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ZIBO INDUSTRIAL CERAMIC REFRACTORY MATERIAL Co Ltd
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ZIBO INDUSTRIAL CERAMIC REFRACTORY MATERIAL Co Ltd
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    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
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    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract

The invention belongs to technical field of function materials, are related to one kind containing zirconium and re-sinter electric cast mullite brick and preparation method thereof.It includes the raw material of following mass percent: electrofused mullite 70-95%, 2-12% containing zirconium material, Al2O3Micro mist 0-27%, SiO2Micro mist 0-10%, additive 0.1-5%.It adds zirconium oxide in electrofused mullite, while guaranteeing that load softening point temperature is high, improves alkali resistant vapours attack ability and thermal stress resistance impact capacity；Invention also provides a kind of simple and easy, energy-saving and environment-friendly preparation methods that electric cast mullite brick is re-sintered containing zirconium.

Description

One kind re-sintering electric cast mullite brick and preparation method thereof containing zirconium
Technical field
The invention belongs to technical field of function materials, are related to one kind containing zirconium and re-sinter electric cast mullite brick and its preparation side Method.
Background technique
With the development of material technology, the requirement of the Thermal Equipment used to material industry is higher and higher.High temperature, superhigh temperature The increasingly harshness of Thermal Equipment, all-oxygen combustion and use condition, it is desirable that the capabilities of refractory materials of Thermal Equipment also will be mentioned constantly It is high.Re-sinter electric cast mullite brick is high with load softening point temperature, volume stability under high temperature is good, high temperature creep rate is low etc. Advantage is widely used in the positions such as the high temperature position of thermal kiln furnace and the flame space of glass furnace, arch top.But it is invaded in alkali vapor Lose more serious, Thermal Stress is larger and the positions such as all-oxygen combustion burner, re-sinter the service life of electric cast mullite brick by It influences.
Chinese patent application 201310431067.6 (103496992 A of CN) discloses a kind of chromium zirconium mullite fire proofed wood Material and preparation method thereof, manufacturing method are as follows: the use of electrofused mullite or fused mullite is aggregate, with zirconium English powder, schmigel, Chrome oxide green is article substrate, mullite 65%, schmigel 10%, zirconium English powder 15%, chrome oxide green 10%, according to matching above Side, stirrer for mixing is uniform, 3% or so pulp liquor is added as binder, after mixing evenly 8 hours of ageing mixture, directly It is formed with press machine, keeps the temperature 4 hours after dry in 1650 DEG C or so of high temperature and be burnt into.Compared in conjunction with electrofused mullite Brick improves alkali resistant aggressivity, but introduces chrome oxide green, is easy to impact environment.
Chinese patent application 201410098338.5 (103833398 A of CN) discloses a kind of low zirconium mullite and pours steel brick Preparation method, preparation method be by 50% electrofused mullite, 20% zirconium oxide, 20% andalusite and 3% kyanite press than It is crushed after example mixing, obtains hybrid particles, 5% Guangxi white clay and 2% lignin are respectively crushed into 200 targeted fine powders, it is wooden Element is prepared as being mixed to get blended stock with hybrid particles, Guangxi white clay fine powder after aqueous solution.It is pressed into after adobe at 1450 DEG C Sintering obtains low zirconium mullite in 4 hours and pours steel brick.With excellent antiscour and heat-resisting quantity, creep is small, compressive resistance is high, hot The features such as stability is good, large steel ingot casting uses suitable for nuclear power product.But the product uses andalusite and Guangxi white clay, 1450 DEG C of firings, if firing temperature is excessively high, soaking time is too long will lead to andalusite and mullite partial melting, glass phase and Stomata increases, and influences the overall performances such as elevated temperature strength, therefore, firing temperature cannot be excessively high, can not be excessively high using temperature.
Summary of the invention
The purpose of the present invention is to provide one kind to re-sinter electric cast mullite brick containing zirconium, and oxygen is added in electrofused mullite Change zirconium, while guaranteeing that load softening point temperature is high, improves alkali resistant vapours attack ability and thermal stress resistance impact capacity；This hair It is bright while providing a kind of simple and easy, energy-saving and environment-friendly preparation method that electric cast mullite brick is re-sintered containing zirconium.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
One kind re-sintering electric cast mullite brick containing zirconium comprising the raw material of following mass percent:
Further, described containing zirconium material is the natural minerals containing zirconium oxide or artificial synthesized substance, preferably zirconium One of diamond stone, zirconium oxide, yttrium stable zirconium oxide are a variety of.
Further, the Al2O3Micro mist is alpha-aluminium oxide micro mist, in electro-corundum micro mist, Reactive alumina It is one or more；When it is described containing zirconium re-sinter electric cast mullite brick be moulding by casting when, the Al2O3Micro mist is that alpha-aluminium oxide is micro- The mixture of one or both of powder, electro-corundum micro mist and Reactive alumina or only Reactive alumina.
Further, the SiO2Micro mist is one of natural quartz micro mist, vitreous silica micro mist, high purity silica powder Or it is a variety of；When it is described containing zirconium re-sinter electric cast mullite brick be moulding by casting when, the SiO2Micro mist is natural quartz micro mist, melts The mixture of one or both of fused silica micro mist and high purity silica powder or only high purity silica powder.
Further, the additive includes organic bond and water-reducing agent, and the organic bond is liquid binder With the mixture of solid binder, liquid binder is polyvinyl alcohol and/or epoxy resin, and solid binder is cellulose, institute Stating water-reducing agent is ammonium polyacrylate.
A kind of preparation method as described above re-sintering electric cast mullite brick containing zirconium, comprising the following steps:
(1) by electrofused mullite fine powder, fine powder containing zirconium material, Al2O3Micro mist is uniformly mixed with solid binder fine powder, is obtained To premix fine powder；
(2) by the electrofused mullite particulate material investment batch mixer of partial size > 0.1mm, it is equal to add liquid binder mixing After even, step (1) premix fine powder obtained is added, mixes 10~20min, pug, 4~5h of ageing mixture is made；
(3) it forms, drying；The drying temperature is 80~120 DEG C, keeps the temperature 12~48h；
(4) it is burnt into；Firing temperature is 1500~1750 DEG C, keeps the temperature 8~10h.
A kind of preparation method as described above re-sintering electric cast mullite brick containing zirconium, includes the following steps:
(1) by electrofused mullite, containing zirconium material, Al2O3Micro mist, silicon powder be added in blender it is dry-mixed uniformly, then by its It is added in kneading machine, additive is added and water is kneaded, obtains pug；
(2) it forms, pug is injected into model, obtains green body by the way of vibration moulding or moulding by casting；
(3) it demoulds, is dried after green body is conserved, the drying temperature is 80~120 DEG C, keeps the temperature 12~48h；
(4) it is burnt into, firing temperature is 1500~1750 DEG C, keeps the temperature 8~10h.
It is prepared by the present invention to re-sinter the chemical composition of electric cast mullite brick by mass percentage containing zirconium as Al2O3 70- 80%, Fe2O30-0.5%, ZrO22-10%, SiO217-28%；Its physical property is as follows: the porosity≤17%, volume are close Degree >=2.60g/cm3, cold crushing strength >=100MPa, 0.6 >=1700 DEG C of T of load softening point temperature (0.2MPa).
The present invention has the advantage that compared with the existing technology
(1) CaO, MgO, K all are avoided using high pure raw material2O、Na2The introducing of the impurity such as O influences to re-sinter electricity containing zirconium The high-temperature behavior of molten mullite brick；
(2) ZrO of 2-10% is introduced in matrix2, pyroreaction generation zirconium mullite, reduction coefficient of thermal expansion, raising heat resistanceheat resistant Pinking, corrosion resistance；
(3) mechanical pressing or isostatic pressing are reasonably combined using organic bond, guarantee processability, use organic knot Mixture replaces clay, does not add the more natural minerals of impurity, avoids introducing impurity, guarantees high-temperature behavior；
(4) moulding by casting replaces cement using activated alumina, and CaO is avoided to introduce, and reduces high-temperature behavior；
(5) react sintering between sintering process mesostroma fine powder, and product strength is high；
(6) preparation method is simple, energy conservation and environmental protection, is conducive to large-scale industrial production, is suitable for thermal kiln furnace high temperature Region, the big region of thermal shock, alkali vapours attack intense regions and burner block of pure oxygen burning etc..
Specific embodiment
The invention will be further described below.
Embodiment 1-20
Described to re-sinter electric cast mullite brick containing zirconium, the type of constitutive material, size specification and parts by weight are as follows:
Table 1
Table 2
Table 3
The embodiment 1-16 re-sinters the preparation method of electric cast mullite brick containing zirconium, comprising the following steps:
(1) by electrofused mullite fine powder, fine powder containing zirconium material, Al2O3Micro mist, SiO2Micro mist and solid binder fine powder are mixed It closes uniformly, obtains premix fine powder；
(2) semidry method mixing: first the electrofused mullite particulate material investment batch mixer of partial size > 0.1mm is mixed, is added After mixing, step (1) resulting premix fine powder is added in liquid binder, mixes 10-20min, and semidry method pug is made, and is stranded Expect 4-5h；
(3) machine pressure or isostatic pressing, drying, drying temperature are 80~120 DEG C, keep the temperature 12~48h；
(4) firing, firing temperature are 1500~1750 DEG C, keep the temperature 8~10h, and the zirconium that contains for being made described re-sinters electric smelting not Carry out stone brick.
The embodiment 17-20 re-sinters the preparation method of electric cast mullite brick containing zirconium, comprising the following steps:
(1) by electrofused mullite, containing zirconium material, Al2O3Micro mist, SiO2Micro mist etc. be added in blender it is dry-mixed uniformly, then It adds it in kneading machine, additive is added and water is kneaded, obtains pug；
(2) it forms, pug is injected in assembled model, obtains base by the way of vibration moulding or moulding by casting Body；
(3) it demoulds, drying box is put into after maintenance, drying temperature is 80~120 DEG C, keeps the temperature 12~48h；
(4) firing, firing temperature are 1500~1750 DEG C, keep the temperature 8~10h, and the zirconium that contains for being made described re-sinters electric smelting not Carry out stone brick.
Table 4 Examples 1 to 2, the 0 physical index testing result obtained for re-sintering electric cast mullite brick containing zirconium is as follows:
5 embodiment 1-20 of the table chemical component composition obtained for re-sintering electric cast mullite brick containing zirconium is as follows:
As above data as can be seen that re-sintering the best performance of electric cast mullite brick made from embodiment 1 containing zirconium.

Claims (10)

1. one kind re-sinters electric cast mullite brick containing zirconium, which is characterized in that described to re-sinter electric cast mullite brick by quality containing zirconium The chemical composition of percentage includes Al2O370-80%, Fe2O30-0.5%, ZrO22-10%, SiO217-28%.
2. according to claim 1 re-sinter electric cast mullite brick containing zirconium, which is characterized in that described to re-sinter electric smelting containing zirconium The porosity≤17% of mullite brick, bulk density >=2.60g/cm3, cold crushing strength >=100MPa, load softening point temperature 0.6 >=1700 DEG C of T of degree.
3. according to claim 1 or 2 re-sinter electric cast mullite brick containing zirconium, which is characterized in that it includes following quality The raw material of percentage:
4. according to claim 3 re-sinter electric cast mullite brick containing zirconium, which is characterized in that it is described containing zirconium material be containing There are the natural minerals or artificial synthesized substance of zirconium oxide, preferably one of zircon, zirconium oxide, yttrium stable zirconium oxide or more Kind.
5. according to claim 3 re-sinter electric cast mullite brick containing zirconium, which is characterized in that the Al2O3Micro mist is α One of alumina powder, electro-corundum micro mist, Reactive alumina are a variety of；Electric smelting is re-sintered not containing zirconium when described When stone brick is moulding by casting, the Al2O3Micro mist is one or both of alpha-aluminium oxide micro mist, electro-corundum micro mist and active oxygen The mixture of change aluminium micro mist or only Reactive alumina.
6. according to claim 3 re-sinter electric cast mullite brick containing zirconium, which is characterized in that the SiO2Micro mist is day One of right quartz micropowder, vitreous silica micro mist, high purity silica powder are a variety of；Electric cast mullite brick is re-sintered containing zirconium when described When for moulding by casting, the SiO2Micro mist is that one or both of natural quartz micro mist, vitreous silica micro mist are micro- with HIGH-PURITY SILICON The mixture of powder or only high purity silica powder.
7. according to claim 3 re-sinter electric cast mullite brick containing zirconium, which is characterized in that the additive includes organic Bonding agent and water-reducing agent, the organic bond are the mixture of liquid binder and solid binder, and liquid binder is poly- Vinyl alcohol and/or epoxy resin, solid binder are cellulose, and the water-reducing agent is ammonium polyacrylate.
8. a kind of preparation method for re-sintering electric cast mullite brick containing zirconium as described in claim 1-7 any one, feature It is, comprising the following steps:
(1) by electrofused mullite fine powder, fine powder containing zirconium material, Al2O3Micro mist, SiO2Micro mist mixes with solid binder fine powder It is even, obtain premix fine powder；
(2) it by the electrofused mullite particulate material investment batch mixer of partial size > 0.1mm, adds liquid binder and is uniformly mixed Afterwards, step (1) premix fine powder obtained is added, mixes 10~20min, pug, 4~5h of ageing mixture is made；
(3) it forms, drying；The drying temperature is 80~120 DEG C, keeps the temperature 12~48h；
(4) it is burnt into；Firing temperature is 1500~1750 DEG C, keeps the temperature 8~10h.
9. a kind of preparation method for re-sintering electric cast mullite brick containing zirconium as described in claim 1-7 any one, feature It is, includes the following steps:
(1) by electrofused mullite, containing zirconium material, Al2O3Micro mist, SiO2Micro mist be added in blender it is dry-mixed uniformly, then added Enter into kneading machine, additive is added and water is kneaded, obtains pug；
(2) it forms, pug is injected into model, obtains green body by the way of vibration moulding or moulding by casting；
(3) it demoulds, is dried after green body is conserved, the drying temperature is 80~120 DEG C, keeps the temperature 12~48h；
(4) it is burnt into, firing temperature is 1500~1750 DEG C, keeps the temperature 8~10h.
10. a kind of re-sinter electric cast mullite brick in thermal kiln furnace high-temperature region containing zirconium as described in claim 1-7 any one Domain, the big region of thermal shock, the application in the violent area of alkali vapours attack.
CN201811257748.4A 2018-10-26 2018-10-26 One kind re-sintering electric cast mullite brick and preparation method thereof containing zirconium Pending CN109336575A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
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CN111548175A (en) * 2020-06-22 2020-08-18 焦作诺尔曼炉业有限公司 Low-expansion-rate thermal-shock-resistant erosion-resistant high-strength castable
CN112573932A (en) * 2020-12-16 2021-03-30 淄博工陶新材料集团有限公司 Homogeneous body re-sintered fused zirconia mullite brick and preparation method thereof
CN112759407A (en) * 2021-03-09 2021-05-07 广州市白云区石井特种耐火材料厂 Refractory material and preparation method and application thereof
CN114133227A (en) * 2021-12-08 2022-03-04 湖南仁海科技材料发展有限公司 Long-life wire laying plate and preparation method thereof
CN115417682A (en) * 2022-09-30 2022-12-02 安徽瑞泰新材料科技有限公司 Refractory brick for industrial kiln and preparation method thereof
CN115448709A (en) * 2022-10-21 2022-12-09 湖南旗滨医药材料科技有限公司 Anti-erosion rotating pipe for glass kiln pipe drawing machine and preparation method thereof
CN115448739A (en) * 2022-11-14 2022-12-09 长兴华泰高温窑具股份有限公司 Corrosion-resistant zirconium mullite product for soft magnetic ferrite nitrogen kiln and preparation method thereof

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JPH1110321A (en) * 1997-06-26 1999-01-19 Shinagawa Refract Co Ltd Casting nozzle
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CN111548175A (en) * 2020-06-22 2020-08-18 焦作诺尔曼炉业有限公司 Low-expansion-rate thermal-shock-resistant erosion-resistant high-strength castable
CN112573932A (en) * 2020-12-16 2021-03-30 淄博工陶新材料集团有限公司 Homogeneous body re-sintered fused zirconia mullite brick and preparation method thereof
CN112759407A (en) * 2021-03-09 2021-05-07 广州市白云区石井特种耐火材料厂 Refractory material and preparation method and application thereof
CN114133227A (en) * 2021-12-08 2022-03-04 湖南仁海科技材料发展有限公司 Long-life wire laying plate and preparation method thereof
CN115417682A (en) * 2022-09-30 2022-12-02 安徽瑞泰新材料科技有限公司 Refractory brick for industrial kiln and preparation method thereof
CN115417682B (en) * 2022-09-30 2023-10-03 安徽瑞泰新材料科技有限公司 Refractory brick for industrial kiln and preparation method thereof
CN115448709A (en) * 2022-10-21 2022-12-09 湖南旗滨医药材料科技有限公司 Anti-erosion rotating pipe for glass kiln pipe drawing machine and preparation method thereof
CN115448739A (en) * 2022-11-14 2022-12-09 长兴华泰高温窑具股份有限公司 Corrosion-resistant zirconium mullite product for soft magnetic ferrite nitrogen kiln and preparation method thereof

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