CN1884202A - Periclase-silicon carbide-carbon composite materials and method for preparing same - Google Patents
Periclase-silicon carbide-carbon composite materials and method for preparing same Download PDFInfo
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- CN1884202A CN1884202A CN 200610019553 CN200610019553A CN1884202A CN 1884202 A CN1884202 A CN 1884202A CN 200610019553 CN200610019553 CN 200610019553 CN 200610019553 A CN200610019553 A CN 200610019553A CN 1884202 A CN1884202 A CN 1884202A
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Abstract
The invention discloses a periclase-carborundum-carbon composite material and preparing method, which comprises the following steps: blending 60-90% electric melting or sintered magnesite, 5-35% carborundum, 2-15 % graphite, 0.5-5% carbon black and 0.5-6% additive; mixing 3-9% binder and 0-1%hexamethylenetetramine hardener; stirring; moulding; baking at 150-350 deg.c for 2-24 h. The invention improves oxidation resistance of material and penetrability and aggressivity resistance of melting waste and metal fusion, which fits melting furnace and container liner widely.
Description
Technical field
The invention belongs to technical field of refractory materials.Relate in particular to a kind of periclasite-silicon carbide-carbon composite and preparation method thereof.
Background technology
Oxide compound-non-oxidized substance matrix material is the important directions of refractory materials development.Magnesia carbon refractory 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 carbon composite has good slag resistance and thermal shock resistance, is widely used in the liner of metallurgical furnace and container.In the later stage in last century, the increasing substantially of refractory materials work-ing life, the carbon composite refractory has played vital role.Development along with Clean Steel, ultra low-carbon steel production, people's idea was transferred to from the long lifetime of simple pursuit refractory materials needs to consider the influence of refractory materials to steel quality simultaneously, can be to directly influence of steel quality generation as the refractory materials of smelting furnace and liner thereof.And the existence of carbon has also brought some new problems in traditional magnesium carbon material, mainly be carburetting problem (Li Nanzhu to molten steel, the reaction of refractory materials and iron and steel reaches the influence to steel quality, metallurgical industry press, 2005), because the carbon in the carbon composite at high temperature can be dissolved in the molten steel, cause the carbon content in the molten steel to increase, thereby influence the quality of steel.
In present magnesium carbon composite refractory; SiC adds as antioxidant; add-on is generally below 3%; its effect only is that the carbon in the protection carbon composite is not oxidized; and the carbon in the carbon composite can will have influence on the quality of the cleanliness factor and the steel of molten steel to molten steel recarburization in smelting process.
Summary of the invention
The purpose of this invention is to provide a kind of carbon composite that can reduce to periclasite-silicon carbide-carbon composite of the carbon content of molten steel in smelting process influence and preparation method thereof.
For achieving the above object, the technical solution adopted in the present invention is: percentage composition mixes 60～90% electric smelting or magnesite clinker, 5～35% silicon carbide, 2～15% graphite, 0.5～5% carbon black, 0.5～6% additive by weight, adding the wedding agent of said mixture weight 3～9% and 0～1% hexamethylenetetramine is solidifying agent, compression moulding after mixing was toasted 2～24 hours down at 150～350 ℃ then.
Wherein: electric smelting or magnesite clinker, or be particle or for fine powder or be the mixture of particle and fine powder, grain diameter is that 3～11mm, fine powder particle diameter are 3～95 μ m, the weight ratio of particle and fine powder is 30～80:20～70; Silicon carbide or be fine powder or be the mixture of particle and fine powder, grain diameter is that 1～7mm, fine powder particle diameter are 2～105 μ m, the weight ratio of particle and fine powder is 30～80: 20～70; Graphite or be particle or for fine powder or be the mixture of particle and fine powder, grain diameter is 0.1～1mm, fine powder particle diameter＜0.1mm, the weight ratio of particle and fine powder is 30～80: 20～70; The carbon black granules particle diameter is 0.1～1mm, fine powder particle diameter＜0.1mm, and the weight ratio of particle and fine powder is 30～80: 20～70.
Wedding agent or be resol or for pitch or for resol and bituminous mixture.
Additive or be metallic aluminium or for elemental silicon or for norbide or be the mixture of elemental silicon and norbide, the particle diameter of additive is equal≤fine powder of 1mm.
Because adopt technique scheme, the present invention introduces SiC as main component, to form the MgO-SiC-C series refractory material.SiC introducing amount is more than 5%, and the weight percentage of carbon in SiC has only 30%, so SiC is much smaller than carbon to the carburetting behavior of melting steel.Simultaneously, SiC has high-melting-point, not wetting by slag again, and thermal conductivity advantages of higher, these characteristics are very approaching with graphite again.Thereby the MgO-SiC-C series refractory material also has good slag resistance and thermal shock resistance.
The prepared matrix material of the present invention has high-melting-point and high thermal characteristics, particularly utilizes the characteristic of SiC self-shield oxidation, and the silicon dioxide protective film that the surface generates can be kept apart molten steel and silicon carbide.Simultaneously, in case silicon-dioxide is dissolved in slag or the liquid phase, can increase the viscosity of slag or liquid phase, both can alleviate the damage of slag to refractory materials, can hinder the dissolving in carbon and SiC and the molten steel again, reduce carbon in the refractory materials and SiC recarburization molten steel.
The prepared product of the present invention can be used as the liner of metallurgical furnace and container, and is more much lower than traditional carbon composite to the carburetting behavior of molten steel simultaneously, can satisfy the needs that Clean Steel is smelted.
Embodiment
[embodiment] 1 one kinds of periclasite-silicon carbide-carbon composites and preparation method thereof.Percentage composition is 70～80% electrosmelted magnesite clinker particle and fine powder, 5～20% silicon-carbide particle and fine powder, 2～10% graphite, 1～4% carbon black, 2～3% metallic aluminium powders by weight, adds 3～6% phenolic resin binder and mixes.
Wherein: the electrosmelted magnesite clinker grain diameter between 3～11mm, the fine powder particle diameter is 3～95 μ m, the weight ratio of electrosmelted magnesite clinker particle and fine powder is 40～60: 40～60; The grain diameter of silicon carbide is that 1～7mm, fine powder particle diameter are 50～100 μ m, and the weight ratio of particle and fine powder is 40～60: 40～60; The particle diameter of graphite is 50～500 μ m, and black grain diameter is 10～100 μ m, metallic aluminium powder particle diameter≤1mm.
Compression moulding on press after the mixing and stirring was toasted 16～24 hours down at 200～300 ℃.Can obtain cold crushing strength greater than 30MPa, apparent porosity is less than periclasite-silicon carbide-carbon composite refractory of 15%.
[embodiment] 2 one kinds of periclasite-silicon carbide-carbon composites and preparation method thereof.Percentage composition is 65～85% magnesite clinker particle and fine powder, 6～25% silicon-carbide particle and fine powder, 5～15% graphite, 1～3% carbon black, 1～3% elemental silicon by weight, adds 3～8% resol, 0.2～1% hexamethylenetetramine is that solidifying agent mixes.
Wherein: the electrosmelted magnesite clinker grain diameter is that 3～10mm, fine powder particle diameter are 50～95 μ m, and the grain diameter of silicon carbide is that 2～5mm, fine powder particle diameter are 5～100 μ m.The weight percentage of above-mentioned particle and fine powder is respectively: 30～80: 20～70; The particle diameter of graphite is 50～100 μ m, and the particle diameter of carbon black is 1～100 μ m, the particle diameter≤1mm of elemental silicon.
Compression moulding on press after the mixing and stirring was toasted 16～24 hours down at 150～250 ℃.Can obtain cold crushing strength greater than 30MPa, apparent porosity is less than periclasite-silicon carbide-carbon composite refractory of 18%.
[embodiment] 3 one kinds of periclasite-silicon carbide-carbon composites and preparation method thereof.By weight percentage composition with 75～90% electrosmelted magnesite clinker particles and fine powder, 5～15% silicon-carbide particles and fine powder, 2～10% graphite, 0.5～3% carbon black, 0.2～2% norbide, add 3～8% phenolic resin binder, 0.2～1% hexamethylenetetramine is that solidifying agent mixes.
Wherein: the electrosmelted magnesite clinker grain diameter is that 3～9mm, fine powder particle diameter are 10～90 μ m, and the grain diameter of silicon carbide is that 1～6mm, fine powder particle diameter are 50～100 μ m.The weight percentage of above-mentioned particle and fine powder is respectively to be 30～80: 20～70.The particle diameter of graphite is 50～200 μ m, and the particle diameter of carbon black is 10～80 μ m, the particle diameter≤1mm of norbide.
Compression moulding on press after the mixing and stirring was toasted 16～24 hours down at 150～250 ℃.Can obtain cold crushing strength greater than 30MPa, apparent porosity is less than periclasite-silicon carbide-carbon composite refractory of 15%.
Claims (8)
1, the preparation method of a kind of periclasite-silicon carbide-carbon composite, it is characterized in that percentage composition by weight mixes 60～90% electric smelting or magnesite clinker, 5～35% silicon carbide, 2～15% graphite, 0.5～5% carbon black, 0.5～6% additive, adding the wedding agent of said mixture weight 3～9% and 0～1% hexamethylenetetramine is solidifying agent, compression moulding after mixing was toasted 2～24 hours down at 150～350 ℃ then.
2, the preparation method of periclasite-silicon carbide according to claim 1-carbon composite, it is characterized in that described electric smelting or magnesite clinker, or be particle or for fine powder or be the mixture of particle and fine powder, grain diameter is that 3～11mm, fine powder particle diameter are 3～95 μ m, and the weight ratio of particle and fine powder is 30～80: 20～70.
3, the preparation method of periclasite-silicon carbide according to claim 1-carbon composite, its feature is at described silicon carbide or be fine powder or be the mixture of particle and fine powder, grain diameter is that 1～7mm, fine powder particle diameter are 2～105 μ m, and the weight ratio of particle and fine powder is 30～80: 20～70.
4, the preparation method of periclasite-silicon carbide according to claim 1-carbon composite, it is characterized in that described graphite or for particle or for fine powder or be the mixture of particle and fine powder, grain diameter is 0.1～1mm, fine powder particle diameter＜0.1mm, the weight ratio of particle and fine powder is 30～80: 20～70.
5, the preparation method of periclasite-silicon carbide according to claim 1-carbon composite is characterized in that described carbon black granules particle diameter is 0.1～1mm, fine powder particle diameter＜0.1mm, and the weight ratio of particle and fine powder is 30～80: 20～70.
6, the preparation method of periclasite-silicon carbide according to claim 1-carbon composite is characterized in that described wedding agent or for resol or for pitch or for resol and bituminous mixture.
7, the preparation method of periclasite-silicon carbide according to claim 1-carbon composite, it is characterized in that described additive or for metallic aluminium or for elemental silicon or for norbide or be the mixture of elemental silicon and norbide, the particle diameter of additive is equal≤fine powder of 1mm.
8, according to each described prepared periclasite-silicon carbide-carbon composite of preparation method in the claim 1～7 with periclasite-silicon carbide-carbon composite.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101357850B (en) * | 2007-07-31 | 2011-05-18 | 上海梅山钢铁股份有限公司 | Surface composite material of converter bottom gas supply brick |
| CN102584181A (en) * | 2012-03-20 | 2012-07-18 | 武汉科技大学 | Method for preparing periclase-silicon carbide-carbon composite powder through in-situ reaction |
| CN103964872A (en) * | 2014-05-05 | 2014-08-06 | 武汉科技大学 | Method for preparing periclase-silicon carbide-carbon composite powder by using mechanical method |
| CN104649694A (en) * | 2015-03-13 | 2015-05-27 | 河南省西保冶材集团有限公司 | Tapping hole brick for split assembled converter and production process of tapping hole brick |
| CN105036759A (en) * | 2015-06-10 | 2015-11-11 | 马鞍山金晟工业设计有限公司 | Low-carbon magnesia refractory material and preparation method thereof |
| CN105967703A (en) * | 2016-05-10 | 2016-09-28 | 武汉科技大学 | MgO-Si2N2O-C based refractory material and preparation method thereof |
| CN106495718A (en) * | 2016-10-27 | 2017-03-15 | 北京利尔高温材料股份有限公司 | One tank foundry ladle MgO SiC C working lining bricks and preparation method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654416A (en) * | 2005-01-17 | 2005-08-17 | 武汉科技大学 | Periclase-silicon carbide composite materials and method for preparing same |
| CN1654426A (en) * | 2005-01-17 | 2005-08-17 | 武汉科技大学 | Amorphous periclase-silicon carbide composite fireproof materials and method for preparing same |
-
2006
- 2006-07-06 CN CNB2006100195537A patent/CN100369865C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101357850B (en) * | 2007-07-31 | 2011-05-18 | 上海梅山钢铁股份有限公司 | Surface composite material of converter bottom gas supply brick |
| CN102584181A (en) * | 2012-03-20 | 2012-07-18 | 武汉科技大学 | Method for preparing periclase-silicon carbide-carbon composite powder through in-situ reaction |
| CN103964872A (en) * | 2014-05-05 | 2014-08-06 | 武汉科技大学 | Method for preparing periclase-silicon carbide-carbon composite powder by using mechanical method |
| CN104649694A (en) * | 2015-03-13 | 2015-05-27 | 河南省西保冶材集团有限公司 | Tapping hole brick for split assembled converter and production process of tapping hole brick |
| CN105036759A (en) * | 2015-06-10 | 2015-11-11 | 马鞍山金晟工业设计有限公司 | Low-carbon magnesia refractory material and preparation method thereof |
| CN105967703A (en) * | 2016-05-10 | 2016-09-28 | 武汉科技大学 | MgO-Si2N2O-C based refractory material and preparation method thereof |
| CN106495718A (en) * | 2016-10-27 | 2017-03-15 | 北京利尔高温材料股份有限公司 | One tank foundry ladle MgO SiC C working lining bricks and preparation method |
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| CN100369865C (en) | 2008-02-20 |
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