CN1654426A - Amorphous periclase-silicon carbide composite fireproof materials and method for preparing same - Google Patents
Amorphous periclase-silicon carbide composite fireproof materials and method for preparing same Download PDFInfo
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- CN1654426A CN1654426A CN 200510018155 CN200510018155A CN1654426A CN 1654426 A CN1654426 A CN 1654426A CN 200510018155 CN200510018155 CN 200510018155 CN 200510018155 A CN200510018155 A CN 200510018155A CN 1654426 A CN1654426 A CN 1654426A
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Abstract
The present invention relates to one kind of amorphous periclase-SiC refractory material and it production process. The technological scheme includes mixing fused magnesia or sintered magnesia in 50-90 wt%, silicon carbide in 10-50 wt% and fine silica powder in 3-8 wt%; adding water in 4-8 wt% and water reducing agent in 0.1-3 wt% during construction; and forming through stirring, vibration depositing, and roasting at 100-300 deg.c for 2-24 hr. The produced amorphous composite refractory material has high smelting point, high heat conductivity, and especially self-protecting oxidation characteristic, which is that the oxidized SiC forms one layer of protecting silica film to protect the inside from being further oxidized. The present invention substitutes SiC for graphite to raise the antioxidant performance of the material greatly and using fine silica powder as binding agent makes the material possess raised medium temperature strength.
Description
One, technical field
The invention belongs to the amorphous refractory technical field.Relate in particular to a kind of unsetting periclasite-carborundum refractory and production method thereof.
Two, background technology
Oxide compound-non-oxidized substance matrix material is the important directions of refractory materials development.The MgO-C refractory materials has become Iron And Steel Industry with important refractory materials, and it is that wedding agent is made with the resin by magnesia and graphite.Because graphite is not wetting by slag, the thermal conductivity height, thereby the carbon composite refractory has good slag resistance and thermal shock resistance.But the carbon composite refractory has the weakness that is difficult to overcome, promptly oxidation-resistance poor (Zhang Wenjie, Li Nan writes. the carbon composite refractory. Science Press .).Because the combined carbon that graphite and wedding agent carbonization form is easy to by airborne oxygen oxidation, this is one of major reason of carbon composite refractory damage.In addition, because the carbonization of resin, the middle temperature of the MgO-C material of resin-bonded (as 1000 ℃) intensity is lower.
Three, summary of the invention
The purpose of this invention is to provide a kind of both had higher heat-conductivity, good slag resistance and thermal shock resistance, have good oxidation-resistance and medium temperature intensity high indefinite form composite refractory and production method thereof again.
For achieving the above object, the technical solution adopted in the present invention is: with electric smelting or magnesite clinker, silicon carbide, ultrafine silica powder is raw material; Percentage composition is that 3～8% ultrafine silica powder mixes with 50～90% electric smelting or magnesite clinker, 10～50% silicon carbide and outer dosage by weight, add 4～8% water and 0.1～3% water reducer again, stir the after vibration castable, toasted 2～24 hours down at 100～300 ℃.
Wherein, electric smelting or magnesite clinker, silicon carbide or be particle or for fine powder or be the mixed form of particle and fine powder; The particle size of electric smelting or magnesite clinker between 8～12mm, the fine powder particle diameter between 4～100um, the particle size of silicon carbide at 2～15mm, fine powder particle diameter between 2～120um.The particle of electric smelting or magnesite clinker, silicon carbide and fine powder blended weight percentage be, particle is 30～80%, fine powder is 20～70%.
Owing to adopt technique scheme; the indefinite form composite refractory that the present invention produces has high-melting-point and high thermal; particularly have the self-shield oxidation characteristic, be i.e. form one deck silicon oxide protective membrane at the SiC particle surface after the SiC oxidation, the SiC of protection granule interior is not by further oxidation.The present invention replaces the oxidation-resistance that graphite can improve material greatly with SiC.Simultaneously, with the ultrafine silica powder be the medium temperature intensity that wedding agent can improve material.
Four, embodiment
A kind of production method of unsetting periclasite-silicon carbide composite fireproof materials is a raw material with electrosmelted magnesite clinker, silicon carbide, ultrafine silica powder; Percentage composition is 65～90% electrosmelted magnesite clinker particle and fine powders by weight, and 10～35% silicon-carbide particle and fine powder add 4～7% ultrafine silica powder and mix.Wherein, the particle size of electrosmelted magnesite clinker between 8～10mm, the fine powder particle diameter between 88～5um, the particle size of silicon carbide at 3～10mm, fine powder particle diameter between 100～3um.The particle of electrosmelted magnesite clinker, silicon carbide and fine powder blended weight percentage be, particle is 40～60%, fine powder is 40～60%.
Add 4～6% water and 0.2～0.8% water reducer during construction forming again, the back that stirs adopts the method for vibrating casting to be shaped.Shaping prod toasted under 110～180 ℃ temperature 20～24 hours, obtained the goods of cold crushing strength greater than 30MPa.
Claims (4)
1, a kind of production method of indefinite form periclasite-silicon carbide composite fireproof materials, it is characterized in that with electric smelting or magnesite clinker, silicon carbide, ultrafine silica powder be raw material, percentage composition is that 3～8% ultrafine silica powder mixes with 50～90% electric smelting or magnesite clinker, 10～50% silicon carbide and outer dosage by weight, add 4～8% water and 0.1～3% water reducer again, stir the after vibration castable, toasted 2～24 hours down at 100～300 ℃.
2, the production method of indefinite form periclasite-silicon carbide composite fireproof materials according to claim 1 is characterized in that described electric smelting or magnesite clinker, silicon carbide or for particle or for fine powder or be the mixed form of particle and fine powder; The particle size of electric smelting or magnesite clinker between 8～12mm, the fine powder particle diameter between 4～100um, the particle size of silicon carbide at 2～15mm, fine powder particle diameter between 2～120um.
3, the production method of indefinite form periclasite-silicon carbide composite fireproof materials according to claim 2, the particle and the fine powder blended weight percentage that it is characterized in that described electric smelting or magnesite clinker, silicon carbide be, particle is 30～80%, fine powder is 20～70%.
4, indefinite form periclasite-silicon carbide composite fireproof materials of producing according to the production method of the described indefinite form periclasite-silicon carbide composite fireproof materials of claim 1～2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510018155 CN1654426A (en) | 2005-01-17 | 2005-01-17 | Amorphous periclase-silicon carbide composite fireproof materials and method for preparing same |
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| CN 200510018155 CN1654426A (en) | 2005-01-17 | 2005-01-17 | Amorphous periclase-silicon carbide composite fireproof materials and method for preparing same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100369865C (en) * | 2006-07-06 | 2008-02-20 | 武汉科技大学 | Periclase-silicon carbide-carbon composite materials and method for preparing same |
| CN101811880A (en) * | 2010-04-20 | 2010-08-25 | 中民驰远实业有限公司 | Carbon-free refractory bricks and preparation method thereof |
| CN102295464A (en) * | 2011-06-13 | 2011-12-28 | 武汉科技大学 | Carbon composite fireproof material and preparation method thereof |
| CN102515804A (en) * | 2011-12-23 | 2012-06-27 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of MgO-C castable |
| EP2674407A1 (en) * | 2012-06-15 | 2013-12-18 | Refractory Intellectual Property GmbH & Co. KG | Refractory ceramic formulation and brick formed therefrom |
| CN115385673A (en) * | 2022-09-26 | 2022-11-25 | 武汉科技大学 | High-strength silica brick for hydrogen metallurgy and preparation method thereof |
| CN115466529A (en) * | 2022-09-02 | 2022-12-13 | 郴州市泰益表面涂层技术有限公司 | Coating for water-cooled wall of thermal power boiler and preparation and use methods thereof |
| CN115650703A (en) * | 2022-11-04 | 2023-01-31 | 辽宁利尔镁质合成材料股份有限公司 | Magnesium castable and preparation method thereof |
-
2005
- 2005-01-17 CN CN 200510018155 patent/CN1654426A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100369865C (en) * | 2006-07-06 | 2008-02-20 | 武汉科技大学 | Periclase-silicon carbide-carbon composite materials and method for preparing same |
| CN101811880A (en) * | 2010-04-20 | 2010-08-25 | 中民驰远实业有限公司 | Carbon-free refractory bricks and preparation method thereof |
| CN102295464A (en) * | 2011-06-13 | 2011-12-28 | 武汉科技大学 | Carbon composite fireproof material and preparation method thereof |
| CN102515804A (en) * | 2011-12-23 | 2012-06-27 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of MgO-C castable |
| CN104364221A (en) * | 2012-06-15 | 2015-02-18 | 里弗雷克特里知识产权两合公司 | Refractory ceramic batch and brick produced therefrom |
| WO2013185983A1 (en) * | 2012-06-15 | 2013-12-19 | Refractory Intellectual Property Gmbh & Co. Kg | Refractory ceramic batch and brick produced therefrom |
| EP2674407A1 (en) * | 2012-06-15 | 2013-12-18 | Refractory Intellectual Property GmbH & Co. KG | Refractory ceramic formulation and brick formed therefrom |
| US9334190B2 (en) | 2012-06-15 | 2016-05-10 | Refractory Intellectual Property Gmbh & Co Kg | Refractory ceramic batch and brick formed therefrom |
| AP3755A (en) * | 2012-06-15 | 2016-07-31 | Refractory Intellectual Prop | Refractory ceramic batch and brick produced therefrom |
| CN104364221B (en) * | 2012-06-15 | 2017-06-09 | 里弗雷克特里知识产权两合公司 | Refractory dispensing and the fragment of brick formed by it |
| CN115466529A (en) * | 2022-09-02 | 2022-12-13 | 郴州市泰益表面涂层技术有限公司 | Coating for water-cooled wall of thermal power boiler and preparation and use methods thereof |
| CN115385673A (en) * | 2022-09-26 | 2022-11-25 | 武汉科技大学 | High-strength silica brick for hydrogen metallurgy and preparation method thereof |
| CN115650703A (en) * | 2022-11-04 | 2023-01-31 | 辽宁利尔镁质合成材料股份有限公司 | Magnesium castable and preparation method thereof |
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