CN101007730A - Alumina-spinel flame-proof material for refining aluminium furnace and its production method - Google Patents
Alumina-spinel flame-proof material for refining aluminium furnace and its production method Download PDFInfo
- Publication number
- CN101007730A CN101007730A CN 200710036553 CN200710036553A CN101007730A CN 101007730 A CN101007730 A CN 101007730A CN 200710036553 CN200710036553 CN 200710036553 CN 200710036553 A CN200710036553 A CN 200710036553A CN 101007730 A CN101007730 A CN 101007730A
- Authority
- CN
- China
- Prior art keywords
- alumina
- spinel
- aluminium
- proof material
- flame
- 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
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a manufacturing method of corundum-spinel flameproof material, which comprises the following steps: allocating raw material with 55-60% white corundum, 10%-30% magnesium aluminate spinel, 5-10% fused magnesia sand and 10%-20% alpha-alumina powder; stirring white corundum with grain size at 3-1mm and 1-0.5mm and magnesium aluminate spinel with grain size at 1-0.5mm; adding 2% wood calcium sulfonate as additive; blending 180-order white corundum with grain size at 0.5-0mm, 180-order magnesium aluminate spinel, fused magnesia sand and alpha-alumina powder evenly; pressing; moulding; drying; insulating; obtaining the product with high-aluminium purity.
Description
Technical field
The present invention relates to a kind of production method of technical field of refractory materials, particularly a kind of alumina-spinel flame-proof material for refining aluminium furnace and production method thereof.
Background technology
Aluminium is the second largest metallic substance that consumption is only second to iron and steel, is widely used in fields such as aerospace, communications and transportation, electric, light industry building materials.China's aluminium quality product is not high at present, now uses the main dependence on import of high-performance aluminium.Wherein, the purity level of molten aluminium is not high, and the metallurgical quality of material is poor, and the decontamination effect improving instability is one of China's aluminium performance major reason of being difficult to improve.The gap of home products and external product quality is that mainly impurity element in the product, gas and nonmetal inclusion content are higher.
Inclusion in the molten aluminium is mainly derived from the N in molten aluminium and the furnace gas
2, O
2, H
2The contact reacts of gas such as O, CO and refractory materials and flux.Contact reactss such as refractory materials and molten aluminium and flux are one of main sources that is mingled with in the molten aluminium, and the existence that is mingled with in the molten aluminium can have influence on the quality product of aluminium or aluminium alloy.The refining of molten aluminium is with molded article and the unshape refractory of refractory materials great majority based on high alumina matter, these high alumina refractories be mainly used in molten aluminium with smelting furnace, leave standstill positions such as stove (holding furnace), chute.
Find through literature search prior art, Zhao Shiming etc. were " refractory materials " (2006, the fifth phase, 392-394 page or leaf) " aluminium melting furnace with the resistance to fouling research of extraordinary high alumina brick " delivered proposes the erosion-resisting characteristics that high alumina brick is used for the aluminium melting and has studied high alumina brick in this article.Its deficiency is: high alumina brick contains silicon-dioxide, can be reduced by metallic aluminium in the use, influences the Chemical Composition of metal aluminium liquid.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of alumina-spinel flame-proof material for refining aluminium furnace and production method thereof are provided, make it be difficult for being reduced, thereby reduce the inclusion in the molten aluminium, improve aluminium purity by molten aluminium.
The present invention is achieved by the following technical solutions, described alumina-spinel flame-proof material for refining aluminium furnace, its component and weight percent thereof are as follows: white fused alumina 55～60%, magnesium-aluminium spinel 10%～30%, electrosmelted magnesite clinker 5～10%, Alpha-alumina micro mist 10%～20%.
Described white fused alumina, its grain graininess have three kinds: 3～1mm, 1～0.5mm and 180 orders.
Described magnesium-aluminium spinel, its grain graininess are 1～0.5mm, 0.5～0mm and 180 orders.
Described electrosmelted magnesite clinker, its grain graininess are 180 orders.
Described white fused alumina, component that it comprises and weight percent: Al
2O
3〉=98.5, SiO
2≤ 0.25, Fe
2O
3≤ 0.3, K
2O+Na
2O≤0.3.
Described magnesium-aluminium spinel, component that it comprises and weight percent: Al
2O
3〉=60, MgO 〉=27.
Described electrosmelted magnesite clinker, component that it comprises and weight percent: MgO 〉=98, CaO≤1.2, SiO
2≤ 0.6.
Described Alpha-alumina micro mist, component that it comprises and weight percent: Al
2O
3〉=98.5, SiO2≤0.2, Fe
2O
3≤ 0.08, K
2O+Na
2O≤0.55.
The present invention also provides the production method of above-mentioned alumina-spinel flame-proof material for refining aluminium furnace, be specially: with white fused alumina, magnesium-aluminium spinel, electrosmelted magnesite clinker, the Alpha-alumina micro mist is a raw material, weight percent batch mixing according to above-mentioned raw materials, adding earlier grain graininess in the raw material during batch mixing and be the white fused alumina of 3～1mm and 1～0.5mm and magnesium-aluminium spinel that grain graininess is 1～0.5mm stirs, add simultaneously and account for the lignin sulfonic acid calcium solution of proportioned material 2% weight percent as additive, mix and add 180 purpose white fused aluminas after 2～3 minutes, 0.5～0mm and 180 purpose magnesium-aluminium spinels, electrosmelted magnesite clinker and Alpha-alumina micro mist, add the lignin sulfonic acid calcium solution that accounts for proportioned material 3% weight percent again, continue to mix, compression moulding then, oven dry, insulation obtains described alumina-spinel flame-proof material for refining aluminium furnace.
Described wooden calcium sulfonate solution density is 1.15～1.20g/cm
3
Described continuation mixes, and its time is 8～10 minutes.
Described compression moulding is meant: with the batten of 150Mpa pressure compacting wide 25mm of growth 125mm and high 25mm.
Described oven dry was meant: 110 ℃～120 ℃ oven dry 24 hours.
Described insulation is meant: be incubated 3 hours down at 1650 ℃.
The present invention adds magnesium-aluminium spinel in advance, generates a part of magnesium-aluminium spinel by electrosmelted magnesite clinker and alumina powder reaction in the sintering process, forms the corundum-spinel fire resistant materials.Magnesium-aluminium spinel has the fusing point height, normal temperature hot strength height, and thermal expansivity is low, good heat conductivity, the characteristics that the chemical resistance of concrete ability is strong are a kind of fine raw material for refractory.Our experiments show that the strength at normal temperature of gained sample is all greater than 26.5Mpa, cold crushing strength is greater than 70Mpa, and void content is less than 20%, and volume density is greater than 2.95g/cm
3, linear expansivity is less than 1.2%.
Embodiment
Below embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1:
The weight percentages of components of alumina-spinel flame-proof material for refining aluminium furnace: white fused alumina: 3～1mm45%, 1～0.5mm5%, 180 orders 5%, magnesium-aluminium spinel: 1～0.5mm5%, 0.5～0mm10%; Alpha-alumina micro mist 20%; Electrosmelted magnesite clinker 180 orders 10%.
Batch mixing at first, during batch mixing, add earlier that to account for the proportioned material weight percent be the above particle of 2% the solution additive combination grain 0.5mm of wooden calcium sulfonate, to be mixed evenly after, adding the following raw material of grain graininess 0.5mm again and accounting for the proportioned material weight percent is wooden calcium sulfonate's solution additive of 3%, continues to mix about 8～10 minutes, after mixed, be pressed into the batten of 125mm * 25mm * 25mm with 150Mpa pressure, 120 ℃ of oven dry are after 24 hours, 1650 ℃ down insulation burnt till in three hours.
The normal temperature physicals of gained sample: strength at normal temperature is 29.50MPa, and cold crushing strength is 102.93MPa, and void content is 20.17%, and volume density is 2.95g/cm
3, the line velocity of variation is 1.07%.
Embodiment 2:
The weight percentages of components of alumina-spinel flame-proof material for refining aluminium furnace: take by weighing white fused alumina: 3～1mm45%, 1～0.5mm10%, 180 orders 5%; Magnesium-aluminium spinel: 1～0.5mm5%, 0.5～0mm5%; Alpha-alumina micro mist 20%; Electrosmelted magnesite clinker 180 orders 10%.
Batch mixing at first, during batch mixing, add earlier that to account for the proportioned material weight percent be the above particle of 2% the solution additive combination grain 0.5mm of wooden calcium sulfonate, to be mixed evenly after, adding the following raw material of grain graininess 0.5mm again and accounting for the proportioned material weight percent is wooden calcium sulfonate's solution additive of 3%, continues to mix about 8～10 minutes.Be pressed into the batten of 125mm * 25mm * 25mm after mixed with 150Mpa pressure, 120 ℃ of oven dry were incubated three hours down at 1650 ℃ and burn till after 24 hours.
The normal temperature physicals of gained sample: strength at normal temperature is 21.55MPa, and cold crushing strength is 63.77MPa, and void content is 19.53%, and volume density is 2.93g/cm
3, the line velocity of variation is 0.98%.
Embodiment 3:
The weight percentages of components of alumina-spinel flame-proof material for refining aluminium furnace: take by weighing white fused alumina: 3～1mm45%, 1～0.5mm5%, 180 orders 5%; Magnesium-aluminium spinel: 1～0.5mm5%, 0.5～0mm10%, 180 orders 5%; Alpha-alumina micro mist 16.5%; Electrosmelted magnesite clinker 180 orders 8.5%.
Batch mixing at first, during batch mixing, add earlier that to account for the proportioned material weight percent be the above particle of 2% the solution additive combination grain 0.5mm of wooden calcium sulfonate, to be mixed evenly after, adding the following raw material of grain graininess 0.5mm again and accounting for the proportioned material weight percent is wooden calcium sulfonate's solution of 3%, continues to mix about 8～10 minutes.Be pressed into the batten of 125mm * 25mm * 25mm after mixed with 150Mpa pressure, 120 ℃ of oven dry were incubated three hours down at 1650 ℃ and burn till after 24 hours.
The normal temperature physicals of gained sample: strength at normal temperature is 27.27MPa, and cold crushing strength is 91.30MPa, and void content is 19.42%, and volume density is 2.99g/cm
3, the line velocity of variation is 1.11%.
Embodiment 4:
The weight percentages of components of alumina-spinel flame-proof material for refining aluminium furnace: take by weighing white fused alumina: 3～1mm45%, 1～0.5mm5%, 180 orders 5%; Magnesium-aluminium spinel: 1～0.5mm5%, 0.5～0mm10%, 180 orders 15%; Alpha-alumina micro mist 10%; Electrosmelted magnesite clinker 180 orders 5%.
Batch mixing at first, during batch mixing, add earlier that to account for the proportioned material weight percent be the above particle of 2% the solution additive combination grain 0.5mm of wooden calcium sulfonate, to be mixed evenly after, adding the following raw material of grain graininess 0.5mm again and accounting for the proportioned material weight percent is wooden calcium sulfonate's solution additive of 3%, continues to mix about 8～10 minutes.Be pressed into the batten of 125mm * 25mm * 25mm after mixed with 150Mpa pressure, 120 ℃ of oven dry were incubated three hours down at 1650 ℃ and burn till after 24 hours.
The normal temperature physicals of gained sample: strength at normal temperature is 28.11MPa, and cold crushing strength is 79.70MPa, and void content is 19.31%, and volume density is 3.05g/cm
3, the line velocity of variation is 0.88%.
Claims (10)
1, a kind of alumina-spinel flame-proof material for refining aluminium furnace is characterized in that, its component and weight percent thereof are as follows: white fused alumina 55～60%, magnesium-aluminium spinel 10%～30%, electrosmelted magnesite clinker 5～10%, Alpha-alumina micro mist 10%～20%.
2, alumina-spinel flame-proof material for refining aluminium furnace according to claim 1 is characterized in that, described white fused alumina, its grain graininess have three kinds: 3～1mm, 1～0.5mm and 180 orders;
Described white fused alumina, component that it comprises and weight percent: Al
2O
3〉=98.5, SiO
2≤ 0.25, Fe
2O
3≤ 0.3, K
2O+Na
2O≤0.3.
3, alumina-spinel flame-proof material for refining aluminium furnace according to claim 1 is characterized in that, described magnesium-aluminium spinel, its grain graininess are 1～0.5mm, 0.5～0mm and 180 orders;
Described magnesium-aluminium spinel, component that it comprises and weight percent: Al
2O
3〉=60, MgO 〉=27.
4, alumina-spinel flame-proof material for refining aluminium furnace according to claim 1 is characterized in that, described electrosmelted magnesite clinker, its grain graininess are 180 orders;
Described electrosmelted magnesite clinker, component that it comprises and weight percent: MgO 〉=98, CaO≤1.2, SiO
2≤ 0.6.
5, alumina-spinel flame-proof material for refining aluminium furnace according to claim 1 is characterized in that,
Described Alpha-alumina micro mist, component that it comprises and weight percent: Al
2O
3〉=98.5, SiO
2≤ 0.2, Fe
2O
3≤ 0.08, K
2O+Na
2O≤0.55.
6, a kind of preparation method who gets alumina-spinel flame-proof material for refining aluminium furnace according to claim 1, it is characterized in that, with white fused alumina, magnesium-aluminium spinel, electrosmelted magnesite clinker, the Alpha-alumina micro mist is a raw material, weight percent batch mixing according to raw material, adding earlier grain graininess in the raw material during batch mixing and be the white fused alumina of 3～1mm and 1～0.5mm and magnesium-aluminium spinel that grain graininess is 1～0.5mm stirs, add simultaneously and account for the lignin sulfonic acid calcium solution of proportioned material 2% weight percent as additive, mix the back and add 180 purpose white fused aluminas, 0.5～0mm and 180 purpose magnesium-aluminium spinels, electrosmelted magnesite clinker and Alpha-alumina micro mist, add the lignin sulfonic acid calcium solution that accounts for proportioned material 3% weight percent again, continue to mix, compression moulding then, oven dry, insulation obtains described alumina-spinel flame-proof material for refining aluminium furnace.
7, refined aluminum stove according to claim 1 is characterized in that with the preparation method of corundum～spinel refractory materials described wooden calcium sulfonate solution density is 1.15～1.20g/cm
3
8, the preparation method of alumina-spinel flame-proof material for refining aluminium furnace according to claim 1 is characterized in that, described compression moulding is meant: with the batten of 150Mpa pressure compacting wide 25mm of growth 125mm and high 25mm.
9, the preparation method of alumina-spinel flame-proof material for refining aluminium furnace according to claim 1 is characterized in that, described oven dry is meant: 110 ℃～120 ℃ oven dry 24 hours.
10, the preparation method of alumina-spinel flame-proof material for refining aluminium furnace according to claim 1 is characterized in that, described insulation is meant: be incubated 3 hours down at 1650 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710036553 CN101007730A (en) | 2007-01-18 | 2007-01-18 | Alumina-spinel flame-proof material for refining aluminium furnace and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710036553 CN101007730A (en) | 2007-01-18 | 2007-01-18 | Alumina-spinel flame-proof material for refining aluminium furnace and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101007730A true CN101007730A (en) | 2007-08-01 |
Family
ID=38696436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710036553 Pending CN101007730A (en) | 2007-01-18 | 2007-01-18 | Alumina-spinel flame-proof material for refining aluminium furnace and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101007730A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948300A (en) * | 2010-08-26 | 2011-01-19 | 武汉科技大学 | Corundum-spinel lightweight heat-insulating material and preparation method thereof |
| CN103030410A (en) * | 2012-12-14 | 2013-04-10 | 河南瑞泰耐火材料科技有限公司 | Aluminum magnesium chromium composited spinel brick |
| TWI394842B (en) * | 2009-05-20 | 2013-05-01 | China Steel Corp | Insulation material |
| CN103964879A (en) * | 2014-05-29 | 2014-08-06 | 张婷 | Gunning mix for medium-sized steel ladle |
| CN104177109A (en) * | 2014-09-12 | 2014-12-03 | 青岛润鑫伟业科贸有限公司 | Process for producing corundum-magnesia-alumina spinel refractory |
| CN106431438A (en) * | 2016-09-28 | 2017-02-22 | 武汉钢铁股份有限公司 | Castable for tundish slag wall and preparation method of castable |
| CN106747528A (en) * | 2017-03-10 | 2017-05-31 | 天津纳诺泰克科技有限公司 | A kind of magnesium aluminum spinel pouring material of the anti-aluminium liquid pollution of the resistive connection knurl for aluminum i ndustry |
-
2007
- 2007-01-18 CN CN 200710036553 patent/CN101007730A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI394842B (en) * | 2009-05-20 | 2013-05-01 | China Steel Corp | Insulation material |
| CN101948300A (en) * | 2010-08-26 | 2011-01-19 | 武汉科技大学 | Corundum-spinel lightweight heat-insulating material and preparation method thereof |
| CN103030410A (en) * | 2012-12-14 | 2013-04-10 | 河南瑞泰耐火材料科技有限公司 | Aluminum magnesium chromium composited spinel brick |
| CN103964879A (en) * | 2014-05-29 | 2014-08-06 | 张婷 | Gunning mix for medium-sized steel ladle |
| CN104177109A (en) * | 2014-09-12 | 2014-12-03 | 青岛润鑫伟业科贸有限公司 | Process for producing corundum-magnesia-alumina spinel refractory |
| CN106431438A (en) * | 2016-09-28 | 2017-02-22 | 武汉钢铁股份有限公司 | Castable for tundish slag wall and preparation method of castable |
| CN106431438B (en) * | 2016-09-28 | 2020-01-07 | 武汉钢铁有限公司 | Castable for tundish slag-stopping wall and preparation method thereof |
| CN106747528A (en) * | 2017-03-10 | 2017-05-31 | 天津纳诺泰克科技有限公司 | A kind of magnesium aluminum spinel pouring material of the anti-aluminium liquid pollution of the resistive connection knurl for aluminum i ndustry |
| CN106747528B (en) * | 2017-03-10 | 2020-08-28 | 天津纳诺泰克科技有限公司 | Anti-nodulation and aluminum liquid pollution-proof magnesium aluminate spinel castable for aluminum industry |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101851103B (en) | Production method of environment-friendly and energy-saving type regenerative magnesia-carbon brick | |
| CN102765953B (en) | Magnesia carbon brick containing composite antioxidant and preparation thereof | |
| CN103539467B (en) | Mechanically-pressed carbon-free corundum spinel ladle brick as well as preparation method thereof | |
| CN101525245B (en) | High strength non-cement corundum castable material used in heating furnace | |
| CN102627463B (en) | Aluminum-spinel-corundum composite refractory material and preparation method as well as application thereof | |
| CN105585322A (en) | Slag-corrosion-resistant magnesite-spinel brick and preparation method thereof | |
| CN101007730A (en) | Alumina-spinel flame-proof material for refining aluminium furnace and its production method | |
| CN102030545A (en) | MgAl2O4-CaAl12O19 composite-phase high-temperature resistant material and preparation method thereof | |
| CN102093065B (en) | Magnesia carbon brick taking composite magnesia as major raw material and preparation method thereof | |
| CN101244940A (en) | Metallic composite low carbon magnesium carbon brick for ladle slag wire and manufacture method thereof | |
| CN110128154A (en) | A kind of low carbon magnesia carbon brick and preparation method adding titanium carbonitride | |
| CN102674866B (en) | Pleonaste heat-insulation composite brick | |
| CN102701759B (en) | Pleonaste brick | |
| CN103332940A (en) | Semi-rebonded magnesite-chrome brick for copper smelter and preparation method thereof | |
| CN105622121A (en) | Low carbon magnesia-alumina-carbon brick combining ceramics at high temperature and preparation method thereof | |
| CN110683851A (en) | Environment-friendly acid furnace lining dry type vibration material | |
| CN106747510A (en) | One kind is without silicon powder iron runner castable and preparation method thereof | |
| CN105174983A (en) | Magnesite-spinel brick for RH inner liner and preparation method of magnesite-spinel brick | |
| CN101591190B (en) | Novel Si3N4-SiC-C refractory brick for sidewall of aluminum electrolysis bath and preparation method thereof | |
| CN105218116B (en) | A kind of chromium-free brick and preparation method thereof | |
| CN102167607B (en) | Dolomite non-burning carbon brick and preparation method thereof | |
| CN104478455A (en) | Low-carbonmagnesia carbon brick with non-oxidereinforcing and toughening structure and preparation method of low-carbonmagnesia carbon brick | |
| CN101429044B (en) | Alumina hollow ball product containing magnesia | |
| CN106866126A (en) | A kind of corundum spinelle refractory brick and preparation method thereof | |
| CN104193363B (en) | A kind of method improving MgO-C brick intensity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |