DE868275C - Highly refractory mass with increased thermal conductivity - Google Patents

Highly refractory mass with increased thermal conductivity

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Publication number
DE868275C
DE868275C DEC3306A DEC0003306A DE868275C DE 868275 C DE868275 C DE 868275C DE C3306 A DEC3306 A DE C3306A DE C0003306 A DEC0003306 A DE C0003306A DE 868275 C DE868275 C DE 868275C
Authority
DE
Germany
Prior art keywords
thermal conductivity
highly refractory
magnesium aluminate
highly
mass
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.)
Expired
Application number
DEC3306A
Other languages
German (de)
Inventor
Paul Colmerauer
Friedrich Wilhelm Dr Gaertner
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Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DEC3306A priority Critical patent/DE868275C/en
Application granted granted Critical
Publication of DE868275C publication Critical patent/DE868275C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
    • C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
    • 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
    • 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
    • C04B35/12—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 chromium oxide
    • 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
    • C04B35/42—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 chromites
    • 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
    • C04B35/44—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 aluminates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B29/00—Other details of coke ovens
    • C10B29/02—Brickwork, e.g. casings, linings, walls

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Description

Hochfeuerfeste Masse mit erhöhter Wärmeleitfähigkeit Die Erfindung bez!ieht sich auf hochfeuerfeste Massen mit höherer Wärmeleitfähigkeit und auf ihre Herstelltingsverfahren.Highly refractory mass with increased thermal conductivity The invention relates to highly refractory masses with higher thermal conductivity and to their Manufacturing process.

Derartige wärmeleitende hochfeuerfeste Massen werden auf vielen verschiedenen Gebieten der che#-mischen und metallurgischen Industrie!' z,. B. in Kokereien, Gasanstalten, Zinkhutten usw., benötigt, wo das zu behandelnde #Gut, z. B. Brenn-, Destillier-oder Sublimiergut, in, Behältern oder Kammern indirekter Hitze ausgesetzt werden muß.Such thermally conductive highly refractory masses are used on many different Areas of chemical and metallurgical industries! ' z ,. B. in coking plants, gas stations, Zinc hats, etc., are required where the #good to be treated, e.g. B. burning, distilling or Items to be sublimated, in, containers or chambers must be exposed to indirect heat.

Es ist bekannt, daß die bisher in der Technik verwendeten hochfeuerfesten Materialien im allgemeinen. eine sehr geringe, Wärmeleitfähigkeit besitzen, die überdies einen negativen Temperaturkoeffizienten besitzt. Beispielsweise besitzt Siliciumcarbid bei 40o' eine Wärmeleitzahl (kcal/m2h) = 10,5 und bei i--,ool von nur 6,5. Dieentsprechenden Zahlen für Magnesiumoxyd sind 2,7 und 1,6 und für Aluminiumoxyd i,g#5 und 1,78. Es wurde nun gefunden, daß hochfeuorfeste Massen mit vorher bestimmbarer, insbesondere temperaturkonstanter Wärmeleitfähigkeit durch Verwendung eines Magnesiumaluminates bestimmter Zusammensetzung als Gemischanteil erzeugbar sind. Diese Magnesiumaluminatmasslen werden in einem nicht zum Stande der Technik gehörigen Vorschlag beschrieben. Sie werden durch Fällung von Magnesiumhydroxyd und Aluminaten in wäßrigen Lösungen hergestellt. Das Verfahren wird dabei vorzugsweise derart durchgeführt, daß ein hochfeuerfestes, Material entsteht, welches in seiner Zusammensetzung der Formel 4 Mgl 0 - A12 0, entspricht.It is known that the highly refractory materials heretofore used in the art generally. have a very low thermal conductivity, which also has a negative temperature coefficient. For example, silicon carbide has a coefficient of thermal conductivity (kcal / m2h) = 10.5 at 40o 'and only 6.5 at i -, ool. The corresponding numbers for magnesia are 2.7 and 1.6 and for alumina i, g # 5 and 1.78. It has now been found that highly refractory masses with a previously determinable, in particular temperature-constant thermal conductivity can be produced by using a magnesium aluminate of a certain composition as a mixture component. These magnesium aluminate materials are described in a proposal that does not belong to the state of the art. They are produced by the precipitation of magnesium hydroxide and aluminates in aqueous solutions. The method is preferably carried out in such a way that a highly refractory material is produced which, in its composition , corresponds to the formula 4 Mgl 0 -A12 0.

Dieses Verfahren und das aus ihm gewonnene hochfeuerfeste Material ist neuartig und. technisch ,vertvoll. Der Erweichungspunkt liegt bereits über 2000', der Schmelzpunkt also noch wenig höher, und die Masse behält bis zum Schmelzen ihren basischen bzw. neutralen Charalzter, so daß sie weder von sauren noch insbesondere von basischen Schlacken angegriffen wird.This process and the highly refractory material obtained from it is novel and. technical, thorough. The softening point is already over 2000 ', the melting point is therefore a little higher, and the mass retains its own until it melts basic or neutral character, so that they are neither acidic nor especially basic Slag is attacked.

Es wurde gefunden, daß diese vorteilhaften Eigenschaften auch dann erhalten bleiben, wenn die Magnesiumaluminatmassen mit gut wärmeleitenden Stoffen an sich bekannter Zusammensetzung, wie Kupfer, Aluminium oder anderen zerkleinerten Metallen, vermischt wird.It has been found that these beneficial properties also are retained if the magnesium aluminate masses with substances that conduct heat well known composition, such as copper, aluminum or other crushed Metals, is mixed.

Die vor-liegende Erfindung betrifft demgemäß eine hochfeuerfeste Masse mit höherer Wärmeleitfähigkeit und kennzeichnet sich dadurch, daß sie neben wä#rmeleitf5,higen Stoffen bekannter Zusa,mmensetzung Magnes#iumalu#minatmasse-n enthält, deren Mg O-Gehalt größer ist als der Al.O.-Gehalt. Vorzugsweise wird als Gemisehanteil eine Magnesiumalurninatmasse der Zusammensetzung 4 Mg 0 - A12 0, verwendet.The present invention accordingly relates to a highly refractory mass with higher thermal conductivity and is characterized in that, in addition to thermally conductive substances with a known composition, it contains magnesium aluminate masses, the MgO content of which is greater than the Al .O.-content. A magnesium aluminate mass of the composition 4 Mg 0 - A12 0 is preferably used as the mixture.

Die Erfindung betrifft fernerhin das Verfahren zur Herstellung solcher hochfeuerfester Massen mit höherer Wärmeleitfähigkeit, dessen Eigenart darin besteht, daß gut wärmeleitende Stoffe und Ma,-gnesiumaluminatmasse der vorgenannten Zusammensetz-ung in Mischmaschinen in äußerst feiner Form vermischt und bei entsprechenderTemperatur gebrannt werden. Die quantitative und qualitative', Zusammensetzung des. Gemisches hängt dabei von den Anforderungen an die thertnischen und chemischen Eigenschaften des Fertigerzeugnisses ab. Die jeweils erforderlichen Mischungsverhältnisse lassen sich ohne erfinderisches Zutun mit den in der keramischen Technik üblichen Versuchsmethoden feststellen, Entscheidend ist in jedem Fall die Verwendung des im vorstehenden gekennzeichneten besonderen Magnesiumaluminates, dessen günstige thermische und chemische Eigenschaften im Gesamtgemisch vorherrschen.The invention also relates to the method for producing such highly refractory masses with higher thermal conductivity, the peculiarity of which is that that highly thermally conductive substances and magnesium aluminate mass of the aforementioned composition mixed in extremely fine form in mixing machines and at the appropriate temperature to be burned. The quantitative and qualitative 'composition of the mixture depends on the requirements for the thermal and chemical properties of the finished product. Leave the required mixing ratios in each case without any inventive effort using the experimental methods customary in ceramic technology determine, the use of the above is decisive in any case special magnesium aluminates, its favorable thermal and chemical properties predominate in the overall mix.

Die hochfeuerfesten Massen nach der Erfindung sind beispielsweise fü-r Muffeln, Retorten, Steine und andere Bauteile- zu verwenden, um in Kokereien, Gasanstalten, Zinkhütten usw. das in Behältern oder Kammern eingeschlossene Brenn-, Destillier- oder Sublimiergut in#dir#kter Hitze auszusetzen.The highly refractory masses according to the invention are for example for muffles, retorts, stones and other components - to be used in coking plants, Gas stations, zinc works, etc. the combustion, Exposing the goods to be distilled or sublimed to intense heat.

Claims (2)

PATENTANSPRÜGIIF- i. Hochfeuerfeste Masse mit höherer Wärmeleitfähigkeit, dadurch gekennzeichnet, daß sie neben gut wärmeleitenden Stoffen, wie Kupfer, Aluminium oder anderen zerkleinerten Metallen, Magnesiumaluminatmassen enthält, deren Mg 0-Gehalt größer als der Al.o.-Gehalt ist. PATENT CLAIM- i. Highly refractory mass with higher thermal conductivity, characterized in that it contains, in addition to highly thermally conductive materials such as copper, aluminum or other comminuted metals, magnesium aluminate masses whose Mg 0 content is greater than the Al.o. content. 2. Hochf euerf estes Material na-ch Anspruch i, dadurch gekennzeichnet, daß es eine Magnesiurnaluminatmasse der Zusammensetzung 4 Mg 0 - A12 Q, als Gemischanteil enthält. 3-. Verfahren zur Herstellung von hochfeuerfestem Material nach Anspruch i oder 2, dadurch gekennzeichnet, daß gut wärmeleitende Stoffe und Magnesiumaluminatrnasse der vorgenannten Zusammensetzung in Mischmaschinen in äußerst feiner F&rm vermischt und bei entsprechender Temperatur gebrannt werden.2. Hochf euerfestes material according to claim i, characterized in that it contains a magnesium aluminate mass of the composition 4 Mg 0 - A12 Q, as a mixture portion. 3-. Process for the production of highly refractory material according to claim 1 or 2, characterized in that highly thermally conductive substances and magnesium aluminate wet of the aforementioned composition are mixed in mixing machines in an extremely fine form and fired at the appropriate temperature.
DEC3306A 1949-04-14 1949-04-14 Highly refractory mass with increased thermal conductivity Expired DE868275C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC3306A DE868275C (en) 1949-04-14 1949-04-14 Highly refractory mass with increased thermal conductivity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC3306A DE868275C (en) 1949-04-14 1949-04-14 Highly refractory mass with increased thermal conductivity

Publications (1)

Publication Number Publication Date
DE868275C true DE868275C (en) 1953-02-23

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092028A2 (en) * 1982-04-20 1983-10-26 Alcoa Chemie GmbH Process for the winning of refractory raw materials with simultaneous elimination of organic substances from alkaline mother liquor of the Bayer process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092028A2 (en) * 1982-04-20 1983-10-26 Alcoa Chemie GmbH Process for the winning of refractory raw materials with simultaneous elimination of organic substances from alkaline mother liquor of the Bayer process
EP0092028A3 (en) * 1982-04-20 1984-12-05 Alcoa Chemie Gmbh Process for the winning of refractory raw materials with simultaneous elimination of organic substances from alkaline mother liquor of the bayer process

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