DE1099428B - Process for the production of unfired carbon-rich refractory moldings and masses - Google Patents

Process for the production of unfired carbon-rich refractory moldings and masses

Info

Publication number
DE1099428B
DE1099428B DED30715A DED0030715A DE1099428B DE 1099428 B DE1099428 B DE 1099428B DE D30715 A DED30715 A DE D30715A DE D0030715 A DED0030715 A DE D0030715A DE 1099428 B DE1099428 B DE 1099428B
Authority
DE
Germany
Prior art keywords
carbon
stabilized
dolomite
production
percent
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
Application number
DED30715A
Other languages
German (de)
Inventor
Dr Friedrich Bischoff
Dr Josef Wuhrer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dolomitwerke GmbH
Original Assignee
Dolomitwerke GmbH
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 Dolomitwerke GmbH filed Critical Dolomitwerke GmbH
Priority to DED30715A priority Critical patent/DE1099428B/en
Priority to GB1791160A priority patent/GB906122A/en
Publication of DE1099428B publication Critical patent/DE1099428B/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
    • 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
    • C04B2/00—Lime, magnesia or dolomite
    • C04B2/10—Preheating, burning calcining or cooling
    • C04B2/102—Preheating, burning calcining or cooling of magnesia, e.g. dead burning
    • 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
    • C04B28/02—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 hydraulic cements other than calcium sulfates
    • C04B28/10—Lime cements or magnesium oxide cements
    • C04B28/105—Magnesium oxide or magnesium carbonate cements
    • 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
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
    • C04B2235/321—Dolomites, i.e. mixed calcium magnesium carbonates
    • 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
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • C04B2235/425—Graphite
    • 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
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5463—Particle size distributions
    • C04B2235/5472—Bimodal, multi-modal or multi-fraction

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Description

Die technische Herstellung von feuerfesten Kohlenstoffsteinen und ihre Verwendung zum Auskleiden insbesondere von metallurgischen Öfen mit reduzierender Ofenatmosphäre ist bekannt.The technical manufacture of refractory carbon bricks and their use for lining In particular, metallurgical furnaces with a reducing furnace atmosphere are known.

Die vorliegende Erfindung betrifft die Herstellung von Kohlenstoffsteinen unter Verwendung von an sich bekanntem stabilisiertem hydraulischem Sinterdolomit, dessen Kalkkomponente also vornehmlich durch SiO2, gegebenenfalls auch unter Zusatz von Cr2O3 und/oder ZrO2 od. ä., in einem vorangehenden Sinterprozeß abgesättigt und dadurch hydraulisch gemacht ist.The present invention relates to the production of carbon bricks using known stabilized hydraulic sintered dolomite, the lime component of which is thus primarily saturated by SiO 2 , optionally also with the addition of Cr 2 O 3 and / or ZrO 2 or the like, in a preceding sintering process and is thereby made hydraulic.

Der Vorteil des Verfahrens liegt außer in der einfacheren Durchführung noch darin, daß Körper mit bestimmten Eigenschaften erhalten werden. Durch den Gehalt an Dolomit eignen sich so hergestellte Steine besonders für den Einsatz als Ofenfutter für basische Prozesse mit reduzierender oder neutraler Ofenatmosphäre. The advantage of the method lies in the fact that it is easier to carry out and that the body with certain properties can be obtained. Stones made in this way are suitable due to the dolomite content especially for use as furnace lining for basic processes with reducing or neutral furnace atmosphere.

Die Herstellung solcher Kohlenstoffsteine erfolgt durch Anmachen der Mischung von Kohlenstoff in Form von Koks, Petrolkoks, Graphit, Ruß od. ä. und stabilisiertem Sinterdolomit mit Wasser und Verdichten zu Formkörpern durch Stampfen, Rütteln, Vibrieren, Pressen u. dgl.; nach der hydraulischen Erhärtung sind diese Formkörper (Steine oder Blöcke) einsatzbereit. Man kann aber auch die ungeformte lose Masse an Ort und Stelle mischen und mit Wasser anmachen und durch Einstampfen, Verschmieren usw. einbringen.The manufacture of such carbon stones is done by mixing the mixture of carbon in Form of coke, petroleum coke, graphite, soot or the like and stabilized sintered dolomite with water and compression to moldings by tamping, shaking, vibrating, pressing and the like; after hydraulic hardening these shaped bodies (stones or blocks) are ready for use. But you can also loose the unformed one Mix the mass on the spot and mix with water and rub, smear, etc. bring in.

Mit steigendem Gehalt an Bindemittel, also an gemahlenem stabilisiertem Dolomit, steigt die Kaltdruckfestigkeit und die Abriebfestigkeit der Steine bzw. der erhärteten Masse an, Während bei wenig Bindemittelzusatz, z. B. 10% gemahlenem hydraulischem Sinterdolomit, die Kaltdruckfestigkeit etwa 80 kg/cm2 beträgt, steigt sie bei einem Gehalt von 30'% auf mehrere 100 kg/cm2 an. Es hat sich gezeigt, daß der Gehalt an Kohlenstoff zwischen 99 und 35% liegen kann, man aber dem Wesen des Steines nach Gehalte Vorzugsweise zwischen etwa 90 und etwa 50% liegen soll.With increasing content of binder, i.e. of ground stabilized dolomite, the cold compressive strength and the abrasion resistance of the stones or the hardened mass increase. B. 10% ground hydraulic sintered dolomite, the cold compressive strength is about 80 kg / cm 2 , it increases at a content of 30 '% to several 100 kg / cm 2 . It has been shown that the carbon content can be between 99 and 35%, but depending on the nature of the stone, the content should preferably be between about 90 and about 50%.

Je nach der gewünschten Festigkeit kann der stabilisierte Sinterdolomit außer in gemahlener Form teilweise auch als Körnung zugegeben werden. Die Kohlenstoffkomponente kann ebenfalls als Körnung oder als Pulver oder als Gemisch beider je nach den zu erwartenden keramischen Eigenschaften zur Anwendung kommen.Depending on the desired strength, the stabilized sintered dolomite can be used except in ground form can sometimes also be added as grains. The carbon component can also be used as a grain or as a powder or as a mixture of both, depending on the expected ceramic properties come.

Außerdem können der Mischung noch weitere Stoffe, wie gebrannte Magnesia, Zirkonocxyd, Chromerz, einzeln oder zu mehreren, in gepulverter und/oder gekörnter Form zugesetzt werden.In addition, other substances such as burnt magnesia, zirconium oxide, chrome ore, can be added individually or in groups, in powdered and / or granular form.

Die Feuerfestigkeit solcher Steine ist in neutraler oder reduzierender Atmosphäre, die dem Charakter des Verfahren zur HerstellungThe fire resistance of such stones is in a neutral or reducing atmosphere, which corresponds to the character of the Method of manufacture

ungebrannter kohlenstoffreicherunfired carbon-rich

feuerfester Formkörper und -massenrefractory moldings and masses

Anmelder:
Dolomitwerke G.m.b.H., WülfrathApplicant:
Dolomitwerke GmbH, Wülfrath

Dr. Josef Wuhrer, Wülfrath,Dr. Josef Wuhrer, Wülfrath,

und Dr. Friedrich Bischoff, Hagen (Westf.),and Dr. Friedrich Bischoff, Hagen (Westphalia),

sind als Erfinder genannt wordenhave been named as inventors

Kohlenstoffsteines entspricht, sehr gut und liegt oberhalb 1800° C.Carbon stone corresponds very well and is above 1800 ° C.

Die nach vorliegendem Verfahren hergestellten Steine sind nach der hydraulischen Erhärtung sofort einsatzfähig, sie bedürfen also keiner besonderen und aufwendigen Nachbehandlung wie die bisher bekannten Kohlenstoffsteine, die vor dem eigentlichen Einsatz erst einem langwierigen und sorgfältig gesteuerten Brennprozeß in speziellen Öfen unterworfen werden müssen.The stones produced according to the present process are immediately after hydraulic hardening ready for use, so they do not require any special and time-consuming post-treatment as the previously known ones Carbon stones, which before the actual use only a lengthy and carefully controlled Firing process must be subjected to special ovens.

Zustellungen aus solchen kohlenstoffreichen Formkörpern eignen sich für Widerstands-, Hochfrequenz-, Lichtbogen-, Kupol- und Hochöfen usw.Inlays made of such carbon-rich moldings are suitable for resistance, high-frequency, Arc, cupola and blast furnaces, etc.

Claims (4)

Patentansprüche:Patent claims: 1. Verfahren zur Herstellung ungebrannter kohlenstoffreicher feuerfester Formkörper und Auskleidungen mit stabilisiertem Dolomit, dadurch gekennzeichnet, daß 99 bis 35, vorzugsweise 90· bis 50 Gewichtsprozent Kohlenstoff mit 1 bis 65 Gewichtsprozent stabilisiertem, hydraulisch abbindendem Sinterdolomit und Wasser gemischt und durch Stampfen, Rütteln, Pressen oder dergleichen Maßnahmen geformt werden.1. Process for the production of unfired carbon-rich refractory moldings and Linings with stabilized dolomite, characterized in that 99 to 35, preferably 90 to 50 percent by weight carbon with 1 to 65 percent by weight stabilized, hydraulically setting Sintered dolomite and water mixed and pounded, shaken, pressed or the like Measures are shaped. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Kohlenstoff Koks, Petrolkoks, Graphit, Ruß od. ä. verwendet werden.2. The method according to claim 1, characterized in that the carbon coke, petroleum coke, Graphite, carbon black or the like can be used. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als stabilisierter hydraulischer Sinterdolomit ein Produkt verwendet wird, in welchem der CaO-Gehalt vorzugsweise durch Kieselsäure, gegebenenfalls auch unter Zusatz von chromoxyd- und/oder zirkonoxydhaltigen und ähnlichen Materialien in einem besonderen Brennprozeß zu3. The method according to claim 1, characterized in that the stabilized hydraulic sintered dolomite a product is used in which the CaO content is preferably reduced by silica, optionally also with the addition of chromium oxide and / or zirconium oxide and similar materials in a special firing process 109 509/516109 509/516 einem stabilisierten Produkt abgesättigt ist, das die Fähigkeit besitzt, hydraulisch abzubinden.is saturated with a stabilized product that has the ability to set hydraulically. 4. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß der Mischung gebrannte Magnesia, Zirkonoxyd, Chromerz und ähnliche Stoffe einzeln oder zu mehreren in gepulverter und/oder gekörnter Form zugesetzt werden.4. The method according to claim 1 to 3, characterized in that the mixture is calcined Magnesia, zirconium oxide, chrome ore and similar substances individually or in several powdered form and / or in granular form. In Betracht gezogene Druckschriften:Considered publications: Deutsche Patentschriften Nr. 922 460, 901391, 022, 966 229;German patents No. 922 460, 901391, 022, 966 229; deutsche Auslegeschrift Nr. 1 014 914; USA.-Patentschrift Nr. 1 674 961;German Auslegeschrift No. 1 014 914; U.S. Patent No. 1,674,961; Niederleuthner? Unbildsame Rohstoffe keramischer Massen, 1928, S. 441Niederleuthner? Unsympathetic raw materials of ceramic Massen, 1928, p. 441
DED30715A 1959-05-22 1959-05-22 Process for the production of unfired carbon-rich refractory moldings and masses Pending DE1099428B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DED30715A DE1099428B (en) 1959-05-22 1959-05-22 Process for the production of unfired carbon-rich refractory moldings and masses
GB1791160A GB906122A (en) 1959-05-22 1960-05-20 Refractory element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED30715A DE1099428B (en) 1959-05-22 1959-05-22 Process for the production of unfired carbon-rich refractory moldings and masses

Publications (1)

Publication Number Publication Date
DE1099428B true DE1099428B (en) 1961-02-09

Family

ID=7040610

Family Applications (1)

Application Number Title Priority Date Filing Date
DED30715A Pending DE1099428B (en) 1959-05-22 1959-05-22 Process for the production of unfired carbon-rich refractory moldings and masses

Country Status (2)

Country Link
DE (1) DE1099428B (en)
GB (1) GB906122A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1227373B (en) * 1964-10-03 1966-10-20 Hoechst Ag Process for the production of fine-pored carbon molded bodies
WO2011110333A1 (en) * 2010-03-10 2011-09-15 H.C. Carbon Gmbh Building material with thermally insulating properties

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1674961A (en) * 1928-06-26 Tobies corp
DE830022C (en) * 1948-03-12 1952-01-31 Arbed Method of manufacturing refractory bodies
DE901391C (en) * 1941-05-03 1954-01-11 Hoerder Huettenunion Ag Thermal protection for the autogenous surface hardening
DE922460C (en) * 1948-10-02 1955-01-17 Steinkohlenbergwerk Hannover H Shaped bodies made of carbon and ceramic materials and process for their production
DE966229C (en) * 1952-09-11 1957-07-18 Westdeutsche Kalk Und Portland Refractory basic materials
DE1014914B (en) * 1953-01-26 1957-08-29 Westdeutsche Kalk Und Portland Refractory basic materials

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1674961A (en) * 1928-06-26 Tobies corp
DE901391C (en) * 1941-05-03 1954-01-11 Hoerder Huettenunion Ag Thermal protection for the autogenous surface hardening
DE830022C (en) * 1948-03-12 1952-01-31 Arbed Method of manufacturing refractory bodies
DE922460C (en) * 1948-10-02 1955-01-17 Steinkohlenbergwerk Hannover H Shaped bodies made of carbon and ceramic materials and process for their production
DE966229C (en) * 1952-09-11 1957-07-18 Westdeutsche Kalk Und Portland Refractory basic materials
DE1014914B (en) * 1953-01-26 1957-08-29 Westdeutsche Kalk Und Portland Refractory basic materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1227373B (en) * 1964-10-03 1966-10-20 Hoechst Ag Process for the production of fine-pored carbon molded bodies
WO2011110333A1 (en) * 2010-03-10 2011-09-15 H.C. Carbon Gmbh Building material with thermally insulating properties

Also Published As

Publication number Publication date
GB906122A (en) 1962-09-19

Similar Documents

Publication Publication Date Title
EP0100306B1 (en) Method of producing refractory non basic and non isolating bricks and masses that contain carbon
DE3620473C2 (en)
DE1099428B (en) Process for the production of unfired carbon-rich refractory moldings and masses
DE2854998C2 (en) Use of refractory concrete for furnace linings
DE2037937B2 (en) Process for the production of lightweight ceramic moldings
DE1471143B2 (en) Molding compound for the production of refractory linings containing aluminum oxide for metal melting and casting equipment and a method for the production of such linings
DE1646837C2 (en) Process for the production of refractory, in particular unfired, magnesite chrome and chrome magnesite bricks
DE1154753B (en) Process for the production of porous, ceramic, granular materials
AT242047B (en) Process for the manufacture of refractory masses and articles
DE767579C (en) Process for the production of sintered magnesia
DE733901C (en) Process for the manufacture of refractory bricks
AT252099B (en) Process for the production of basic, refractory bricks, blocks and ramming masses
DE933977C (en) Highly refractory stones and masses made of quartz material
DE2911038C2 (en) Process for the production of high-strength, dense aggregates for road construction or for normal concrete from clayey-silicate raw materials
DE945227C (en) Process for the production of unfired, highly refractory magnesite products
DE1236392B (en) Filling compound for the joints between the furnace wall and the carbon stone layer in furnaces operated at high temperatures
DE2117033C3 (en) Process for making a sintered dolomitic refractory material
DE656928C (en) Process for the manufacture of refractory bricks or linings
DE2635178A1 (en) Refractory esp. for baseplates for ingot moulds - contains corundum mixed with silicon carbide, zircon sand and phosphate binder
DE484531C (en) Process for the manufacture of furnace linings
DE739479C (en) Fireproof pouring compound
DE565889C (en) Process for the production of highly refractory bricks
DE1118685B (en) Process for the production of unfired carbonaceous dolomite stones, blocks and linings
DE1471283C (en) Process for making refractory dolomite bricks
DE1059823B (en) Refractory masses and processes for their manufacture