DE857322C - Highly refractory product - Google Patents

Highly refractory product

Info

Publication number
DE857322C
DE857322C DES2341D DES0002341D DE857322C DE 857322 C DE857322 C DE 857322C DE S2341 D DES2341 D DE S2341D DE S0002341 D DES0002341 D DE S0002341D DE 857322 C DE857322 C DE 857322C
Authority
DE
Germany
Prior art keywords
refractory product
highly refractory
lime
product according
zirconium
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
DES2341D
Other languages
German (de)
Inventor
Georges Bouchet
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.)
Saint Gobain Quartz SAS
Original Assignee
Quartz and Silice SA
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 Quartz and Silice SA filed Critical Quartz and Silice SA
Application granted granted Critical
Publication of DE857322C publication Critical patent/DE857322C/en
Expired 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
    • C04B35/01—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
    • C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
    • 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
    • C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/482—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
    • C04B35/01—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
    • C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/484—Refractories by fusion casting
    • 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
    • C04B35/653—Processes involving a melting step
    • C04B35/657—Processes involving a melting step for manufacturing refractories

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Description

Hödistfeuerfestes Erzeugnis Trotz seines sehr hohen Schmelzpunktes kann das Zirkon, sogar im geschmolzenen Zustande, nicht für sich allein verwendet werden, um höchstfeuerfeste Erzeugnisse herzustellen, denn es unterliegt polymorphen Umwandlungen, welche von Änderungen der Dichte begleitet sind und bis zum Zerfall des feuerfesten Körpers gehen können. Es ist bereits vorgeschlagen worden, dem Zirkon kleine Mengen an Kalk zuzusetzen, um seine Kristallisation in quadratis ' cher Form herbeizuführen und seine Stabilität zu erhöhen.Hödist refractory product Despite its very high melting point, the zircon, even in the molten state, cannot be used on its own to produce highly refractory products, because it is subject to polymorphic transformations, which are accompanied by changes in density and can go as far as the disintegration of the refractory body . It has already been proposed to add the zirconium small amounts of lime to bring about 'cher to its crystallization in quadratis shape and to increase its stability.

Kalk für sich allein würde ein ausgezeichnetes feuerfestes -Material sein. Wenn er jedoch geschmolzen worden ist, zerfällt er an feuchter Luft plötzlich; er löscht sich. Gegenstand der Erfindung ist ein durch Schmelzen oder durch Brennen bei sehr hoher Temperatur hergestelltes höchstfeuerfestes Erzeugnis, das durch die gleichzeitige Gegenwart von Zirkon und Kalk mit oder ohne weitere Zusätze gekennzeichnet ist, wobei der Anteil des Kalks molekular gerechnet zwischen 30 und 70 0/0 beträgt. Eine geeignete Zusammensetzung besteht beispielsweise aus einem Molekül Kalk und einem Molekül Zirkon. Man hat beispielsweise festgestellt, daß die geschmolzenen Zirkon-Kalk-Mischungen unerwarteterweise eine Wärme-und chemische Beständigkeit besitzen, die größer ist als die ihrer Bestandteile. Das Erzeugnis hält Temperaturen bis ZU 2200' C aus, ohne da!ß sich Verformungen ergeben, und wird durch den Einfluß feuchter Luft nicht verändert. Dieses Ergebnis wird unter der VorbedIngung erzielt, daß der Gehalt an Kalk unter 70% bleibt. Das Verfahren geht also bis zur Stabilisierung des Kalks und soll seine Verwendung für die Herstellung feuerfester Körper ermöglichen.Lime on its own would make an excellent refractory material. However, when it has been melted, it suddenly disintegrates in moist air; he extinguishes himself. The invention relates to an extremely refractory product made by melting or burning at very high temperature, which is characterized by the simultaneous presence of zirconium and lime with or without further additives, the proportion of lime being between 30 and 70% in molecular terms . A suitable composition consists, for example, of one lime molecule and one zirconium molecule. For example, it has been found that the molten zirconium-lime mixtures unexpectedly have a heat and chemical resistance which is greater than that of their constituents. The product can withstand temperatures up to 2200 "C, without da! Ss deformations to arise, and is not changed by the influence of humid air. This result is achieved on condition that the lime content remains below 70%. The process therefore goes as far as the stabilization of the lime and is intended to enable it to be used for the production of refractory bodies.

Der Kalk kann ganz oder teilweise durch das Oxyd eines anderen Metalls der Gruppe 11 (Untergruppe a) des Periodischen Systems, d. h. durch das Oxyd des Berylliums, Strontiums, Magnesiums, oder Bariums, ersetzt werden. Man muß in jedem Falle die anteiligen Mengen verwenden, die sich aus dem Schmelzpunktsdiagramm ergeben. Alle diese Diagramme besitzen den gleichen Verlauf. Die Eutektika und die definierten Zusammensetzungen weisen Schmelzpunkte auf, die zwischen --2oo und 2700' C schwanken.The lime can be wholly or partially replaced by the oxide of another metal from group 11 (subgroup a) of the periodic table, i.e. H. be replaced by the oxide of beryllium, strontium, magnesium, or barium. In each case one must use the proportional amounts which result from the melting point diagram. All of these diagrams have the same course. The eutectics and the defined compositions have melting points that vary between --2oo and 2700 ° C.

Die Mischungen können (beispielsweise im Lichtbogenofen) geschmolzen und in flüssigem Zustande in Formen gegossen werden. Sie können auch auf keramischem Wege hergestellt und dann bei hoher Temperatur gebrannt werden. Man kann die durch Schmelzen erzeugten stabilen Mischungen wieder verwenden, und zwar auf keramischemWege, nachdem sie in geeignetem Grade zerkleineit worden sind.The mixtures can be melted (for example in an electric arc furnace) and poured into molds in a liquid state. You can also use ceramic Paths are made and then burned at high temperature. You can get through it Reuse stable mixtures produced by melting, in a ceramic way, after they have been comminuted to an appropriate degree.

Claims (2)

P A TENTANSPR ÜC H E: i. Höchstfeuerfestes Erzeugnis, gekennzeichnet durch die Anwesenheit von Zirkon und Kalk, wobei die anteilige Menge des letzteren molekular gerechnet zwischen 30 und 700/0 beträgt. PA TENTANSPR ÜC H E: i. Highly refractory product, characterized by the presence of zirconium and lime, the proportion of the latter being between 30 and 700/0 in molecular terms. 2. Höchstfeuerfestes Erzeugnis nach Anspruch i, dadurch gekennzeichnet, daß der Kalk ganz oder teilweise durch das Oxyd des Strontiums, Bariums, Magnesiums oder Berylliums ersetzt wird. 3. Höchstfeuerfestes Erzeugnis nach Anspruch i und 2, dadurch gekennzeichnet, daß es durch Zusammenschmelzen der Bestandteile hergestellt wird. 4. Höchstfeuerfestes Erzeugnis nach Anspruch i und 2, dadurch gekennzeichnet, daß es auf keramischem Wege durch Brennen des Versatzes aus den Ausgangsbestandteilen oder Brennen der entsprechend zerkleinerten geschmolzenenZusammensetzung hergestellt wird.2. Highly refractory product according to claim i, characterized in that the lime is wholly or partially replaced by the oxide of strontium, barium, magnesium or beryllium. 3. Highly refractory product according to claim i and 2, characterized in that it is produced by melting the components together. 4. Highly refractory product according to claims i and 2, characterized in that it is produced in a ceramic way by firing the batch from the starting components or firing the appropriately comminuted molten composition.
DES2341D 1943-10-27 1944-07-09 Highly refractory product Expired DE857322C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR985427T 1943-10-27

Publications (1)

Publication Number Publication Date
DE857322C true DE857322C (en) 1952-11-27

Family

ID=9537368

Family Applications (1)

Application Number Title Priority Date Filing Date
DES2341D Expired DE857322C (en) 1943-10-27 1944-07-09 Highly refractory product

Country Status (3)

Country Link
DE (1) DE857322C (en)
FR (1) FR985427A (en)
GB (1) GB594020A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824794A (en) * 1954-05-18 1958-02-25 Nat Lead Co Process for fusion of high-melting metals
FR1482073A (en) * 1966-03-21 1967-05-26 Commissariat Energie Atomique Electrically conductive ceramic material and its preparation process
US5151201A (en) * 1988-07-01 1992-09-29 Vesuvius Crucible Company Prevention of erosion and alumina build-up in casting elements
FR2633611B1 (en) * 1988-07-01 1991-05-10 Vesuvius France Sa MATERIAL FOR COVERING OF A CASTING MEMBER

Also Published As

Publication number Publication date
GB594020A (en) 1947-10-31
FR985427A (en) 1951-07-18

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