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NO325204B1 - Dry exothermic composition for making refractory products - Google Patents

Dry exothermic composition for making refractory products Download PDF

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Publication number
NO325204B1
NO325204B1 NO20050614A NO20050614A NO325204B1 NO 325204 B1 NO325204 B1 NO 325204B1 NO 20050614 A NO20050614 A NO 20050614A NO 20050614 A NO20050614 A NO 20050614A NO 325204 B1 NO325204 B1 NO 325204B1
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weight
aluminum
composition
refractory
composition according
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NO20050614A
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Norwegian (no)
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NO20050614L (en
NO20050614D0 (en
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Stephane Bouteiller
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Elkem As
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Priority to NO20050614A priority Critical patent/NO325204B1/en
Publication of NO20050614D0 publication Critical patent/NO20050614D0/en
Priority to PCT/NO2006/000040 priority patent/WO2006091105A1/en
Publication of NO20050614L publication Critical patent/NO20050614L/en
Publication of NO325204B1 publication Critical patent/NO325204B1/en

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/1328—Waste materials; Refuse; Residues without additional clay
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/135—Combustion residues, e.g. fly ash, incineration waste
    • C04B33/1355—Incineration residues
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/138—Waste materials; Refuse; Residues from metallurgical processes, e.g. slag, furnace dust, galvanic waste
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • 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
    • C04B35/10—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 based on aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
    • C04B35/62209—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse using woody material, remaining in the ceramic products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • 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
    • C04B35/63—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 using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303—Inorganic additives
    • C04B35/6316—Binders based on silicon compounds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials
    • C04B2111/00551—Refractory coatings, e.g. for tamping
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Ceramic Products (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

Ildfast sammensetning for fremstilling av ildfaste gjenstander så som ovnsforinger, øseforinger og foringer for metallurgiske kar. Sammensetningen innbefatter aluminiumaske som virker som et eksotermisk materiale og som et ildfast materiale.Refractory composition for the preparation of refractory objects such as furnace liners, ladle liners and metallurgical vessel linings. The composition includes aluminum ash which acts as an exothermic material and as a refractory material.

Description

Dem foreliggende oppfinnelse vedrører ildfaste sammensetninger for bruk ved fremstilling av ildfaste produkter så som ovnsforinger, øseforinger og foringer for metallurgiske kar. The present invention relates to refractory compositions for use in the manufacture of refractory products such as furnace linings, ladle linings and linings for metallurgical vessels.

Ildfaste produkter fremstilles vanligvis ved bruk av våte ildfaste sammensetninger. Slike ildfaste sammensetninger er blant annet kjent fra GB 1117977, JPA 61261256 og JPA 11130515. Refractory products are usually manufactured using wet refractory compositions. Such refractory compositions are known, among other things, from GB 1117977, JPA 61261256 and JPA 11130515.

GB 1117977 vedrører en sammensetning for foring av den indre overflaten av en støpeform for metallstøping. Sammensetningen inneholder minst 50 vekt % av aluminiumaske og er fri for oksidasjonsmidler. I tillegg til aluminiuimaske kan sammensetningen inneholde 2-30 vekt % organisk fibermateriale, 1-10 vekt % ildfast fibermateriale og 1-10 vekt % bindemiddel. De ildfaste sammensetningene fremstilles ved at komponentene blandes i en vanndig slurry som filtreres for å danne ildfaste komponenter. GB 1117977 relates to a composition for lining the inner surface of a mold for metal casting. The composition contains at least 50% by weight of aluminum ash and is free of oxidizing agents. In addition to aluminum mask, the composition can contain 2-30% by weight of organic fiber material, 1-10% by weight of refractory fiber material and 1-10% by weight of binder. The refractory compositions are produced by mixing the components in an aqueous slurry which is filtered to form refractory components.

JPA 61261256 vedrører varmeisolerende ildfaste blokker inneholdende mer enn 50 vekt % Al203-basert aske og mindre enn 50 vekt % bindemiddel. Komponentene blandes med vann, presses og sintres for å oppnå blokker. JPA 61261256 relates to heat-insulating refractory blocks containing more than 50% by weight of Al203-based ash and less than 50% by weight of binder. The components are mixed with water, pressed and sintered to obtain blocks.

JPA 11130515 vedrører et keramisk produkt som er spesielt godt egnet som bygningsmateriale, hvor ca 50 vekt % aluminiumaske blandes med et vannløselig bindemiddel som natriumsilikat, samt silika og eventuelt andre komponenter, et vannløselig organisk bindemiddel samt vann. Blandingen knuses, avgasses og presses under trykk hvoretter de formede produktene tørkes og brennes. JPA 11130515 relates to a ceramic product which is particularly well suited as a building material, where approx. 50% by weight of aluminum ash is mixed with a water-soluble binder such as sodium silicate, as well as silica and possibly other components, a water-soluble organic binder and water. The mixture is crushed, degassed and pressed under pressure, after which the shaped products are dried and burned.

Det er imidlertid foretrukket å benytte en tørr teknikk hvor den ildfaste sammensetning anvendes i tørr tilstand. Dette gjør at nødvendigheten for et separat tørketrinn unngås. Slik teknikk er kjent for eksempel fra EP-A-64863. However, it is preferred to use a dry technique where the refractory composition is used in a dry state. This means that the necessity for a separate drying step is avoided. Such technique is known, for example, from EP-A-64863.

Det er ofte ønskelig å forlenge tiden den ildfaste sammensetningen forblir i flytende tilstand under formingen av det ønskede produktet. Dette kan gjøres ved å tilsette et eksotermisk material til den ildfaste sammensetningen. Slik teknikk er kjent for eksempel fra WO 97/35677. It is often desirable to extend the time the refractory composition remains in a liquid state during the forming of the desired product. This can be done by adding an exothermic material to the refractory composition. Such technique is known, for example, from WO 97/35677.

Et eksotermt materiale som er kjent for å være anvendbart for tilsetning til en ildfast sammensetning er aluminiumpulver. Et eksempel på en slik sammensetning er beskrevet i EP-A-675862 hvor sammensetningen omfatter 70 til 95 vekt % partikkelformet ildfast materiale, 1 til 15 vekt % uorganisk bindemiddel med kjemisk eller fysisk bundet vann og 1 til 15 vekt % av et eksotermt materiale. An exothermic material known to be useful for addition to a refractory composition is aluminum powder. An example of such a composition is described in EP-A-675862 where the composition comprises 70 to 95% by weight particulate refractory material, 1 to 15% by weight inorganic binder with chemically or physically bound water and 1 to 15% by weight of an exothermic material.

Mens aluminium er effektivt har det den ulempe at det i elementær form er vanskelig å oppnå en homogen fordeling av aluminiumpulveret i den ildfaste blandingen og derved en jevn temperatur og herding av blandingen når den oppvarmes. Det er derfor et formål med den foreliggende oppfinnelse å fremskaffe et eksotermt material som vil være mer enkelt å blande homogent med andre ildfaste materialer og med bindemidler. While aluminum is effective, it has the disadvantage that in elementary form it is difficult to achieve a homogeneous distribution of the aluminum powder in the refractory mixture and thereby a uniform temperature and hardening of the mixture when it is heated. It is therefore an aim of the present invention to provide an exothermic material which will be easier to mix homogeneously with other refractory materials and with binders.

I henhold til den foreliggende oppfinnelsen er det fremskaffet en tørr, eksoterm sammensetning for fremstilling av ildfaste produkter hvilken sammensetning omfatter 60-75 vekt % aluminiumaske, 10-30 vekt % partikkelformet ildfast materiale, 2-10 vekt % uorganisk bindemiddel og opptil 8 vekt % pulver av aluminiumfolie opptil en total på 100 vekt %. According to the present invention, a dry, exothermic composition for the production of refractory products has been provided, which composition comprises 60-75% by weight aluminum ash, 10-30% by weight particulate refractory material, 2-10% by weight inorganic binder and up to 8% by weight aluminum foil powder up to a total of 100% by weight.

Aluminiumasken kan være pulver eller granulært materiale omfattende elementært aluminium og andre ildfaste materialer slik som alumina. De enkelte partiklene omfatter en intim blanding av disse komponentene. Vanligvis består aluminiumasken av aluminiumpartikler omgitt av alumina. I sammenheng med den ildfaste sammensetning er denne asken eksoterm. The aluminum ash can be powder or granular material comprising elemental aluminum and other refractory materials such as alumina. The individual particles comprise an intimate mixture of these components. Generally, the aluminum ash consists of aluminum particles surrounded by alumina. In the context of the refractory composition, this ash is exothermic.

Det skal bemerkes at aluminiumasken er et vanskelig biprodukt fra aluminiumfremstilling som forekommer når smeltet aluminium behandles med salter, hovedsakelig fluorider, for å raffinere smeltet aluminium På grunn av saltinnholdet er dette materialet miljømessig uønsket og kostbare tiltak må tas for å sikre en sikker deponering. Bruk av aluminiumasken i den ildfaste sammensetningen er derfor meget ønsket. Aluminiumasken kan anvendes i den foreliggende oppfinnelse med saltinnholdet, men fortrinnsvis reduseres eller fjernes saltinnholdet. Passende bindemidler omfatter silikater, sulfater, karbonater, nitrater og borater. Særlig foretrukne bindemidler er natriumsalter, slik som metasilikater. It should be noted that the aluminum ash is a difficult by-product of aluminum production that occurs when molten aluminum is treated with salts, mainly fluorides, to refine molten aluminum. Due to the salt content, this material is environmentally undesirable and expensive measures must be taken to ensure a safe disposal. The use of aluminum ash in the refractory composition is therefore highly desirable. The aluminum ash can be used in the present invention with the salt content, but preferably the salt content is reduced or removed. Suitable binders include silicates, sulphates, carbonates, nitrates and borates. Particularly preferred binders are sodium salts, such as metasilicates.

De partikkelformige ildfaste materialene kan være ethvert passende material så som bauxitt, chamotte, alumina, silika, zirkonia, fosteritt, mulitt, magnesia, kyanitt, andalusitt, silisiumkarbid og en hvilken som helst kombinasjon av disse. Bauxitt og chamotte er spesielt foretrukket. The particulate refractories may be any suitable material such as bauxite, chamotte, alumina, silica, zirconia, fosterite, mullite, magnesia, kyanite, andalusite, silicon carbide and any combination thereof. Bauxite and chamotte are particularly preferred.

Asken omfatter hovedsakelig elementært aluminium og alumina. Det elementære aluminium kan utgjøre fra 10 til 30 vekt % av asken, fortrinnsvis ca. 15 til 25 vekt %, for eksempel ca. 20 vekt %. The ash mainly comprises elemental aluminum and alumina. The elemental aluminum can make up from 10 to 30% by weight of the ash, preferably approx. 15 to 25% by weight, for example approx. 20% by weight.

Sammensetningen inneholder fortrinnsvis 3 til 7 vekt % aluminiumsfolie. Det totale innhold av elementært aluminium er minst 15 vekt % av den totale sammensetningen. The composition preferably contains 3 to 7% by weight of aluminum foil. The total content of elemental aluminum is at least 15% by weight of the total composition.

I det minste en av komponentene inneholder fortrinnsvis kjemisk eller fysisk bundet vann. Vannet kan være bundet til det partikkelformige materialet eller kan være bundet til bindemiddelet. Mest foretrukket er vann bundet til bindemiddelet i form av krystallvann, slik at bindemiddelet fortrinnsvis er et hydratisert krystallinsk salt. At least one of the components preferably contains chemically or physically bound water. The water may be bound to the particulate material or may be bound to the binder. Most preferably, water is bound to the binder in the form of crystal water, so that the binder is preferably a hydrated crystalline salt.

Sammensetningen kan også inkludere andre komponenter som kan være organiske, slik som trepulver, cellulose, fibre, granuler og partikler. The composition may also include other components which may be organic, such as wood powder, cellulose, fibres, granules and particles.

Oppfinnelsen kan utføres i praksis på forskjellige måter og en måte vil bli beskrevet i det etterfølgende ikke-begrensende eksempel. The invention can be carried out in practice in different ways and one way will be described in the following non-limiting example.

Eksempel Example

En ildfast sammensetning ble fremstilt ved å blande de følgende komponenter. A refractory composition was prepared by mixing the following components.

Det totale innhold av elementært aluminium var 18 vekt %. The total content of elemental aluminum was 18% by weight.

Claims (7)

1. En tørr, eksoterm sammensetning for fremstilling av ildfaste produkter, karakterisert ved at den omfatter 60-75 vekt % aluminiumaske 10-30 vekt % partikkelformet ildfast materiale 2-10 vekt % uorganisk bindemiddel og opptil 8 vekt % pulver av aluminiumsfolie opp til en total på 100 vekt %.1. A dry, exothermic composition for the production of refractory products, characterized in that it comprises 60-75% by weight aluminum ash 10-30% by weight particulate refractory material 2-10% by weight inorganic binder and up to 8% by weight of aluminum foil powder up to a total of 100% by weight. 2. Sammensetning ifølge krav 1,karakterisert ved at det partikkelforminge ildfaste materialet er bauxitt og/eller chamotte.2. Composition according to claim 1, characterized in that the particle-forming refractory material is bauxite and/or chamotte. 3. Sammensetning ifølge krav 1, karakterisert ved at aluminiumasken omfatter elementært aluminium og oksid.3. Composition according to claim 1, characterized in that the aluminum ash comprises elemental aluminum and oxide. 4. Sammensetning ifølge krav 3, karakterisert ved at innholdet av elementært aluminium i asken er mellom 10 og 25 vekt %.4. Composition according to claim 3, characterized in that the content of elemental aluminum in the ash is between 10 and 25% by weight. 5. Sammensetning ifølge krav 1, karakterisert ved at den totale mengde av elementært aluminium er minst 15 vekt % av den totale sammensetningen.5. Composition according to claim 1, characterized in that the total amount of elemental aluminum is at least 15% by weight of the total composition. 6. Sammensetning ifølge krav 1, karakterisert ved at bindemiddelet er natriummetasilikat.6. Composition according to claim 1, characterized in that the binder is sodium metasilicate. 7. Sammensetning ifølge krav 1,karakterisert ved at minst en av komponentene inneholder vann som enten er kjemisk eller fysisk bundet.7. Composition according to claim 1, characterized in that at least one of the components contains water which is either chemically or physically bound.
NO20050614A 2005-02-03 2005-02-03 Dry exothermic composition for making refractory products NO325204B1 (en)

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NO20050614A NO325204B1 (en) 2005-02-03 2005-02-03 Dry exothermic composition for making refractory products
PCT/NO2006/000040 WO2006091105A1 (en) 2005-02-03 2006-01-30 Refractory compositions

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NO20050614A NO325204B1 (en) 2005-02-03 2005-02-03 Dry exothermic composition for making refractory products

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NO20050614L NO20050614L (en) 2006-08-04
NO325204B1 true NO325204B1 (en) 2008-02-25

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO20065188L (en) * 2006-11-13 2008-05-14 Elkem As Refractory compositions
NO20065286L (en) * 2006-11-17 2008-05-19 Elkem As Refractory dry powder for ladle and furnace linings for metallurgical vessels
CN109111234A (en) * 2018-08-10 2019-01-01 河南弘盛再生资源利用有限公司 Aluminium scrap ash reprocesses the formula and preparation method that homogeneous refractory raw material is made
CN114229859A (en) * 2022-01-18 2022-03-25 大连易舜绿色科技有限公司 Method for producing electrofused mullite by using industrial aluminum ash
CN116573921B (en) * 2023-07-10 2023-10-13 中国环境科学研究院 Large-size, high-strength lightweight ceramsite based on solid waste and preparation method thereof

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US3326273A (en) * 1965-12-28 1967-06-20 Foseco Int Exothermic hot top
JPS5418224B2 (en) * 1973-07-10 1979-07-05
JPS61261256A (en) * 1985-05-14 1986-11-19 三新産業株式会社 Alumina refractory heat insulating brick and manufacture
GB9226662D0 (en) * 1992-12-22 1993-02-17 Foseco Int Refractory compositions
JP4021021B2 (en) * 1997-10-21 2007-12-12 株式会社大紀アルミニウム工業所 Method for producing ceramic products from aluminum ash

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