CN102757250A - Antioxidant used for refractory material - Google Patents
Antioxidant used for refractory material Download PDFInfo
- Publication number
- CN102757250A CN102757250A CN2012102732058A CN201210273205A CN102757250A CN 102757250 A CN102757250 A CN 102757250A CN 2012102732058 A CN2012102732058 A CN 2012102732058A CN 201210273205 A CN201210273205 A CN 201210273205A CN 102757250 A CN102757250 A CN 102757250A
- Authority
- CN
- China
- Prior art keywords
- aluminium
- alloy
- powder
- zinc
- carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to an antioxidant used for a refractory material, specifically relates to an antioxidant used for a carbon-containing refractory product, and belongs to the technical field of fire resistance. The antioxidant used for refractory material comprises the formula by weight percent: 1-100 parts of aluminum zinc alloy and 0-100 parts of routine antioxidant, wherein the aluminum zinc alloy contains 3%-97% of aluminum element and the balance of zinc element; the aluminum zinc alloy is of a powdery shape or a long fiber shape; and the maximum particle size of the alloy of the powdery shape and the maximum diameter of the alloy of the long fiber shape are both 0.2mm. The prepared antioxidant containing the aluminum zinc alloy has the advantages that the temperature range of preventing carbon oxidation is wide, the side effect is little, and the thermal expansion of the refractory material can be regulated.
Description
Technical field
A kind of used for refractory material additive of the present invention, specifically a kind of inhibitor that is used for carbon-containing refractory article belongs to fire-resistant technical field.
Background technology
Carbon containing refractory is meant that important component is the refractory materials of carbon.The carbon materials that with graphite is representative has very high fusing point, boiling point, and its thermal expansivity is low, and heat-shock resistance is very excellent, at high temperature be difficult for soaking into molten steel, slag, and be one type of special refractory materials.Frequent and the compound composition carbon of other material composite refractory of carbon element.These carbon composite refractories have some advantages of carbon element concurrently, and the advantage of other mixture is also arranged.Main carbon containing refractory has magnesia carbon brick, aluminium carbonaceous article, magnesia-alumina-carbon brick, Al2O3MgOC Bricks, magnesia-calcium-carbon brick, magnesium zirconium carbon brick etc.The main weakness of carbon containing refractory is exactly can oxidized damage under high temperature air atmosphere.The inhibitor that present carbon containing refractory generally uses is a kind of or combination in aluminium powder, aluminium-magnesium alloy powder, magnesium powder, silica flour, carborundum powder, the boron carbide powder.Each inhibitor all has its effect and deficiency.Wherein the most frequently used inhibitor is an aluminium powder.Aluminium powder is a good antioxidant, be more than 600 ℃ but aluminium powder plays the temperature of antioxygenation, and carbon element is just beginning oxidation more than 400 ℃.Silica flour, carborundum powder need could effectively play antioxidant effect more than 1000 ℃.Norbide is excellent middle low temperature inhibitor, but its oxidation products fusing point is lower, is unfavorable for the high-temperature behavior of refractory product.Magnesium powder and aluminium-magnesium alloy powder are then because inflammable and explosive characteristics can only limit use.
The most frequently used carbon containing refractory inhibitor is an aluminium powder.Aluminium powder is a good antioxidant, but aluminium powder has following defective.1, the oxidation onset temperature of carbon element is about 400 ℃.The fusing point of metallic aluminium is 660 ℃.Aluminium powder has good antioxidant effect more than melting temperature, but not obvious in aluminium powder antioxygenation below 600 ℃; 2, aluminium powder uses the back metallic aluminium to absorb the verivate that oxygen becomes aluminum oxide or aluminum oxide and other material as the refractory materials of inhibitor through high temperature.Weight increases when absorbing oxygen, and volume increases, and causes refractory materials to produce unwanted expansion, influences volume stability, the heat-shock resistance of refractory materials, also can destroy the metal furnace shell of steel-making converter, electric furnace, refining furnace etc.; 3, aluminium powder is heated back in carbon containing refractory and carbon element reaction generation aluminium carbide.Aluminium carbide can make refractory product become fragile, and reduces the heat-shock resistance of refractory product.Aluminium carbide chance steam can react and cause volumetric expansion, destroys the structure of refractory product.Facts have proved that content of aluminium powder reaches 2% when above, the destruction that the aluminium carbide that refractory product at high temperature produces produces is apparent in view.
Summary of the invention
The object of the present invention is to provide a kind of antioxidant combination of used for refractory material, this inhibitor can effectively improve the oxidation-resistance of carbon containing refractory, and has some characteristics that present common inhibitor does not possess.
According to technical scheme provided by the invention, a kind of used for refractory material inhibitor, formula rate is following by weight percentage: 1 ~ 100 part of aluminium-zinc alloy, 0 ~ 100 part of conventional inhibitor.
Aluminium element content is 3% ~ 97% in the said aluminium-zinc alloy, and all the other are zinc element and small amount of impurities.
Said aluminium-zinc alloy is powdery or macrofiber shape; The maximum diameter of powdered maximum particle diameter and macrofiber shape is 0.2mm.
Said conventional inhibitor is one or more the mixture in aluminium powder, aluminium-magnesium alloy powder, magnesium powder, silica flour, carborundum powder, boron carbide powder, the silicon nitride.
The oxidation onset temperature of carbon element is about 400 ℃.The fusing point of metallic aluminium is 660 ℃.The fusing point of metallic zinc is 419.5 ℃, and boiling point is 907 ℃.The boiling point of metallic zinc is lower, and vp is bigger, just can absorb oxygen more than 200 ℃.This moment, carbon element also was less than oxidizing temperature.Metallic zinc absorbs oxygen in advance, is consumed.
According to the aluminium-zinc alloy binary phase diagram, the liquidus temperature line of aluminium-zinc alloy is between 381 ~ 660 ℃.Compare as inhibitor with independent aluminium powder, the eutectic point of aluminium-zinc alloy is low, and is lower than aluminium powder as the acting temperature of the inhibitor of carbon containing refractory.The oxidation onset temperature of different carbon elements is different in the carbon containing refractory.The fusing point of the aluminium-zinc alloy of different element ratios is also different, and the starting temperature that obviously plays antioxygenation is also different.Can select different element ratios to reach best antioxidant effect according to these characteristics of different carbon elements.
Metallic zinc is in gasification effusion from carbon containing refractory more than 900 ℃.The carbon containing refractory that adds zinc powder is in thermal treatment more than 1200 ℃ after 3 hours, the metallic zinc of wherein retaining just seldom, the antioxygenation of zinc powder has also just lost, and also can stay the cavity in refractory materials inside, influences the follow-up use of refractory materials.
The boiling point of metallic aluminium is 2520 ℃, far above 907 ℃ of metallic zinc.The azeotropic point of aluminium-zinc alloy also falls between.The volatility of aluminium-zinc alloy is weaker than metallic zinc.Compare as inhibitor with zinc powder,, also have part aluminium zinc element to stay and continue to play antioxygenation in the refractory materials even aluminium-zinc alloy has volatilized at part metals zinc in high temperature more than 1000 ℃ uses.
Metallic aluminium adds in the carbon containing refractory, and after using through high temperature, aluminium absorbs oxygen, and producing big quality and volume increases, and causes refractory product to expand, rupture, peel off.After the zinc evaporation in the aluminium-zinc alloy, can increase vacating space, prevent the unusual expansion of refractory materials for the volume after the aluminaization.
Metallic zinc is heated and is evaporated to the surface of carbon-containing refractory article easily, absorbs oxygen again, prevents the surface oxidation of carbon-containing refractory article.Use through high temperature, the metallic zinc major part in the carbon-containing refractory article can evaporate, and can avoid the pollution to refractory product.Zinc element evaporation back in the alloy stays the room in the refractory product tissue.Generate Al after the aluminaization in the alloy
2O
3, produce volumetric expansion, just in time can fill up the room after zinc evaporates in position, prevent the defective that the room causes.
Utilize These characteristics, can control the swell increment after carbon containing refractory uses through high temperature through the aluminium zinc ratio in the control alloy.
Play antioxygenation simultaneously owing to contain two kinds of metallic elements of aluminium zinc in this inhibitor, so when reaching same antioxidant effect, the ratio of metallic aluminium element has just reduced in the refractory materials.The aluminium carbide that refractory product generates in high temperature uses also reduces the spinoff that can reduce or avoid aluminium carbide to bring.
Silit, norbide, Pure Silicon Metal, aluminum magnesium alloy, silicon nitride etc. also respectively have characteristics as the refratory material antioxidant agent.Aluminium-zinc alloy can make up with above-mentioned substance, adapts to the carbon containing refractory of different sorts, different request for utilizations.
The present invention has following advantage: the inhibitor that contains aluminium-zinc alloy of the present invention's preparation prevents that the temperature of carbon element oxidation is lower than aluminium powder; Its TR that plays antioxygenation is big, can also utilize the ratio of aluminium zinc content in the aluminium-zinc alloy to change the volumetric expansion of controlling after refractory materials uses through high temperature.
Description of drawings
Fig. 1 aluminium-zinc alloy binary phase diagram.
Embodiment
Content among the following embodiment is weight percentage.
Embodiment 1
This inhibitor is an aluminium zinc, and wherein the content of metallic zinc is 50%, and the content of metallic aluminium is 50%, the long 6mm of alloy fiber, diameter 0.2mm.
A kind of magnesia carbon brick, proportioning are the electrosmelted magnesite clinker of 10%-198 graphite, 84% 97% purity, 3% phenolic resin binder, 3% above-mentioned aluminium zinc.The temperature that graphite begins oxidation is 500 ℃ approximately, sees that from phasor this alloy promptly produces liquid phase about 470 ℃.The alloy melting afterreaction is active to be improved, can be rapidly and oxygen reaction, and play antioxidant effect, thereby delay the oxidation of carbon element.After the anti-oxidant test in 1000 ℃ * 3 hours, practical decarburized depth is 2.5mm in this magnesia carbon brick process air.
It is 1.2% that this magnesia carbon brick sample buried the volumetric expansion that produces after the carbon thermal treatment through 1500 ℃ * 3 hours.Magnesia, graphite, wedding agent are constant, and it is 3% that the magnesia carbon brick sample that adds 3% aluminium powder buried the volumetric expansion that produces after the carbon thermal treatment through 1500 ℃ * 3 hours.
Embodiment 2
This inhibitor is an aluminium zinc, and wherein the content of metallic zinc is 10%, and the content of metallic aluminium is 90%, the long 6mm of alloy fiber, diameter 0.2mm.
A kind of magnesia carbon brick, proportioning are the electrosmelted magnesite clinker of 10%-198 graphite, 84% 97% purity, 3% phenolic resin binder, 3% above-mentioned aluminium zinc.After the anti-oxidant test in 1000 ℃ * 3 hours, practical decarburized depth is 3mm in this magnesia carbon brick process air.It is 2.5% that this magnesia carbon brick sample buried the volumetric expansion that produces after the carbon thermal treatment through 1500 ℃ * 3 hours.
Embodiment 3
Contain 1 part of aluminium zinc powder, 99 parts of carborundum powders in this inhibitor.The content of metallic zinc is 97% in the aluminium-zinc alloy, and the content of metallic aluminium is 3%, and particle diameter is 200 orders.
A kind of aluminum-silicon carbide brick, proportioning be 3%-N330 carbon black, 32% alumina particle, 30% brown corundum in granules, 17% white fused alumina fine powder, 3% phenolic resin binder, 15% above-mentioned inhibitor.Carbon black in air approximately since 400 ℃ of remarkable oxidations.See that from the binary phase diagram of alloy this alloy promptly produces liquid phase at about about 400 ℃.Alloy melted by heat afterreaction is active to be improved, can be rapidly and oxygen reaction, and play antioxidant effect, thereby delay the sooty oxidation.This refractory brick is using more than 1400 ℃, and silit has good antioxidant effect.So this antioxidant combination from 400 ℃ to playing good antioxidant effect more than 1400 ℃.After the anti-oxidant test in 1000 ℃ * 3 hours, practical decarburized depth is 0.5mm in this goods process air.
Embodiment 4
Contain 60 parts of aluminium zinc powder, 25 parts of silica flours, 5 parts of norbides, 10 parts of silicon nitrides in this inhibitor.The content of metallic zinc is 3% in the aluminium-zinc alloy, and the content of metallic aluminium is 97%, and particle diameter is 200 orders.
A kind of aluminum-carbon brick, proportioning are 25%-197 graphite, 5% N990 carbon black, 50% plate diamond spar particle, 10 % white fused alumina fine powder, 3% phenolic resin binder, 7% above-mentioned inhibitor.After the anti-oxidant test in 1000 ℃ * 3 hours, practical decarburized depth is 1mm in this goods process air.
Test process: downcut 140 * 40 * 40 rectangular parallelepiped sample with diamond custting machine from fire resistive material product.Put into electric furnace to this rectangular parallelepiped sample, vertically place.It is 5 ℃/min that heating curve is set, and 1000 ℃ * 3 hours, turns off electric furnace then.Take out sample after 12 hours.Be cut into isometric 4 sections to sample.Measure practical decarburized depth from 3 cross sections, averaging is net result.
Claims (4)
1. a used for refractory material inhibitor is characterized in that formula rate is following by weight percentage: 1 ~ 100 part of aluminium-zinc alloy, 0 ~ 100 part of conventional inhibitor.
2. used for refractory material inhibitor according to claim 1, it is characterized in that: aluminium element content is 3% ~ 97% in the said aluminium-zinc alloy, all the other are zinc element.
3. used for refractory material inhibitor according to claim 1, it is characterized in that: said aluminium-zinc alloy is powdery or macrofiber shape; The maximum diameter of powdered maximum particle diameter and macrofiber shape is 0.2mm.
4. used for refractory material inhibitor according to claim 1 is characterized in that: said conventional inhibitor is one or more the mixture in aluminium powder, aluminium-magnesium alloy powder, magnesium powder, silica flour, carborundum powder, boron carbide powder, the silicon nitride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102732058A CN102757250A (en) | 2012-08-02 | 2012-08-02 | Antioxidant used for refractory material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102732058A CN102757250A (en) | 2012-08-02 | 2012-08-02 | Antioxidant used for refractory material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102757250A true CN102757250A (en) | 2012-10-31 |
Family
ID=47051935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102732058A Pending CN102757250A (en) | 2012-08-02 | 2012-08-02 | Antioxidant used for refractory material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102757250A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107266053A (en) * | 2017-06-28 | 2017-10-20 | 安徽华飞机械铸锻有限公司 | A kind of Refractory For Steelmaking and preparation method |
| CN111875357A (en) * | 2020-07-30 | 2020-11-03 | 海城市金福锋科技有限公司 | Anti-oxidation high-fracture-resistance hearth castable and production method thereof |
| CN116496094A (en) * | 2023-04-07 | 2023-07-28 | 南京联合荣大工程材料有限责任公司 | Preparation method of carbon source containing targeted antioxidant, carbon source and preparation method of refractory material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03205350A (en) * | 1989-12-28 | 1991-09-06 | Kawasaki Refract Co Ltd | Carbon-containing unburned refractory |
| CN1237562A (en) * | 1999-02-25 | 1999-12-08 | 宝山钢铁(集团)公司 | Anti-oxidizing agent for carbon-contained fireproof material |
-
2012
- 2012-08-02 CN CN2012102732058A patent/CN102757250A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03205350A (en) * | 1989-12-28 | 1991-09-06 | Kawasaki Refract Co Ltd | Carbon-containing unburned refractory |
| CN1237562A (en) * | 1999-02-25 | 1999-12-08 | 宝山钢铁(集团)公司 | Anti-oxidizing agent for carbon-contained fireproof material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107266053A (en) * | 2017-06-28 | 2017-10-20 | 安徽华飞机械铸锻有限公司 | A kind of Refractory For Steelmaking and preparation method |
| CN111875357A (en) * | 2020-07-30 | 2020-11-03 | 海城市金福锋科技有限公司 | Anti-oxidation high-fracture-resistance hearth castable and production method thereof |
| CN116496094A (en) * | 2023-04-07 | 2023-07-28 | 南京联合荣大工程材料有限责任公司 | Preparation method of carbon source containing targeted antioxidant, carbon source and preparation method of refractory material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100534954C (en) | Non-oxide composite low-carbon magnesia-carbon brick | |
| CN107879753B (en) | Silicon carbide-magnesium aluminate spinel composite refractory material | |
| CN100393669C (en) | Titanium nitride magnesia carbon brick containing carbon and its preparing method | |
| CN102452836A (en) | Cement-free aluminum-magnesium castable for rapidly baking ladle | |
| CN101429040A (en) | Composite baking-free stopper rod of magnesium aluminate spinel and production process thereof | |
| CN102603322A (en) | Unfired aluminum-zirconium-carbon slide plate added with silica micro-powder and method for preparing unfired aluminum-zirconium-carbon slide plate | |
| CN102180685A (en) | Air-permeable brick for converter | |
| CN102757250A (en) | Antioxidant used for refractory material | |
| CN104402468B (en) | A kind of ladle deslagging position composite and preparation technology thereof | |
| CN104926323A (en) | Refractory material containing silicon carbide | |
| JP2015044734A (en) | Cement-free refractory | |
| CN102775171B (en) | Resin-bonded aluminum-magnesium refractory material | |
| US2599185A (en) | Refractory body | |
| JP2010280540A (en) | Chromia-enriched castable refractory substance, and precast block using the same | |
| CN103214256B (en) | Al23O27N5-combined corundum composite slide plate and preparation method thereof | |
| CN109279904A (en) | A kind of non-oxide composite low-carbon magnesia-carbon brick | |
| JP2012066986A (en) | Aluminum oxycarbide composition and method for producing the same | |
| CN103693979A (en) | Zirconium oxide composite boron nitride refractory product | |
| CN102015160A (en) | Vessel for molten metal | |
| JP6266968B2 (en) | Blast furnace hearth lining structure | |
| JP2002220290A (en) | Castable refractory | |
| WO2020174719A1 (en) | High-alumina melt-casted refractory and method for manufacturing same | |
| JP2000086360A (en) | Ramming material for induction furnace | |
| JP2019137561A (en) | Monolithic refractory composition | |
| JP2010059037A (en) | Unfired refractory containing carbon |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121031 |