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WO1999008981A1 - Piece moulee ceramique refractaire - Google Patents

Piece moulee ceramique refractaire Download PDF

Info

Publication number
WO1999008981A1
WO1999008981A1 PCT/EP1998/004792 EP9804792W WO9908981A1 WO 1999008981 A1 WO1999008981 A1 WO 1999008981A1 EP 9804792 W EP9804792 W EP 9804792W WO 9908981 A1 WO9908981 A1 WO 9908981A1
Authority
WO
WIPO (PCT)
Prior art keywords
silica sol
weight
dispersion
impregnation
molding according
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.)
Ceased
Application number
PCT/EP1998/004792
Other languages
German (de)
English (en)
Inventor
Jerzy Bugajski
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.)
Veitsch Radex GmbH and Co OG
Original Assignee
Veitsch Radex GmbH and Co OG
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 Veitsch Radex GmbH and Co OG filed Critical Veitsch Radex GmbH and Co OG
Priority to AU87333/98A priority Critical patent/AU8733398A/en
Publication of WO1999008981A1 publication Critical patent/WO1999008981A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
    • C04B41/5089—Silica sols, alkyl, ammonium or alkali metal silicate 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/44—Refractory linings
    • 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
    • C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
    • C04B2111/00275—Materials impermeable to vapours or gases
    • 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
    • C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
    • C04B2111/00879—Non-ferrous metallurgy

Definitions

  • DE 40 01 180 Cl describes a method for impregnating a refractory ceramic molded part with open porosity in which a thixotropic slip is liquefied by means of a mechanical and / or physical excitation unit and introduced into the open pore volume of the molded part. After the open pore volume has been filled, the excitation unit is switched off. The impregnation agent stiffens. The molded body is then tempered. In this way, an almost complete impregnation can be achieved.
  • the object of the invention is to provide a refractory ceramic molded part with an impregnation that at least partially fills the open pore volume, which is environmentally friendly and also resistant to oxidizing melts. Particular importance is attached to high resistance to infiltration and corrosion against metallurgical melts and slags.
  • an embodiment of the invention proposes to limit the degree of concentration (SiOr content) of the silica sol to values below 50% by weight, since the viscosity increases rapidly at higher concentrations.
  • anionic silica sol also promotes the setting of highly concentrated, low-viscosity dispersions.
  • Impregnation dispersion can reduce the gas permeability of a refractory ceramic molded part from, for example, 20 nPm to values ⁇ 2, in some cases ⁇ 0.5 nPm.

Landscapes

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

Abstract

L'invention concerne une pièce moulée céramique réfractaire comportant une imprégnation remplissant au moins partiellement le volume libre des pores. Cette imprégnation est formée d'une dispersion comprenant au moins un sol de silice et un additif supprimant la gélification de ce sol de silice.
PCT/EP1998/004792 1997-08-16 1998-07-31 Piece moulee ceramique refractaire Ceased WO1999008981A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU87333/98A AU8733398A (en) 1997-08-16 1998-07-31 Refractory ceramic moulding

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19735495.5 1997-08-16
DE1997135495 DE19735495C2 (de) 1997-08-16 1997-08-16 Feuerfestes keramisches Formteil

Publications (1)

Publication Number Publication Date
WO1999008981A1 true WO1999008981A1 (fr) 1999-02-25

Family

ID=7839127

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/004792 Ceased WO1999008981A1 (fr) 1997-08-16 1998-07-31 Piece moulee ceramique refractaire

Country Status (3)

Country Link
AU (1) AU8733398A (fr)
DE (1) DE19735495C2 (fr)
WO (1) WO1999008981A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10035728C2 (de) * 2000-07-22 2003-08-28 Veitsch Radex Gmbh Wien Verwendung eines gebrannten feuerfesten keramischen Formteils
DE102009045698A1 (de) * 2009-10-14 2011-04-21 Evonik Degussa Gmbh Verfahren zum Infiltrieren von porösen keramischen Bauteilen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601352A (en) * 1950-01-16 1952-06-24 Du Pont Silica sols and method of making same
US3236665A (en) * 1964-01-16 1966-02-22 Harbison Walker Refractories Silica refractory

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3200483A1 (de) * 1982-01-09 1983-07-21 Bayer Ag, 5090 Leverkusen Kieselsaeurehaltige formkoerper, verfahren zu ihrer herstellung und ihre verwendung
DE4001180C1 (en) * 1990-01-17 1990-11-22 Radex-Heraklith Industriebeteiligungs Ag, Wien, At Refractory ceramic prod. - impregnated with thixotropic slurry including methyl cellulose
JPH07149575A (ja) * 1993-11-29 1995-06-13 Kawasaki Refract Co Ltd 流し込み不定形耐火物

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601352A (en) * 1950-01-16 1952-06-24 Du Pont Silica sols and method of making same
US3236665A (en) * 1964-01-16 1966-02-22 Harbison Walker Refractories Silica refractory

Also Published As

Publication number Publication date
DE19735495A1 (de) 1999-02-18
AU8733398A (en) 1999-03-08
DE19735495C2 (de) 1999-11-04

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