DE4216934A1 - Protective glaze for refractory furnace linings contg. carbonaceous material - prevents burning-off of carbon substances at the surface of the lining at predetermined temps. - Google Patents

Protective glaze for refractory furnace linings contg. carbonaceous material - prevents burning-off of carbon substances at the surface of the lining at predetermined temps.

Info

Publication number
DE4216934A1
DE4216934A1 DE4216934A DE4216934A DE4216934A1 DE 4216934 A1 DE4216934 A1 DE 4216934A1 DE 4216934 A DE4216934 A DE 4216934A DE 4216934 A DE4216934 A DE 4216934A DE 4216934 A1 DE4216934 A1 DE 4216934A1
Authority
DE
Germany
Prior art keywords
contg
lining
protective glaze
temps
substances
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.)
Withdrawn
Application number
DE4216934A
Other languages
German (de)
Inventor
Werner Dipl Ing Fleischmann
Frithjof Dr Ing Dr Schaeuffele
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.)
Fleischmann Adolf A Fa
Original Assignee
Fleischmann Adolf A Fa
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 Fleischmann Adolf A Fa filed Critical Fleischmann Adolf A Fa
Priority to DE4216934A priority Critical patent/DE4216934A1/en
Publication of DE4216934A1 publication Critical patent/DE4216934A1/en
Withdrawn legal-status Critical Current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
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
    • 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
    • C04B35/013—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 containing carbon
    • 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
    • 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
    • C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
    • 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
    • C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

Refractory lining, esp. for industrial furnaces, with a content of carbon-contg. and/or tar-contg. and/or pitch-contg. substances, characterised in that a protective glaze is applied to the surface of the lining to prevent burning off of the carbon-contg. and/or tar-contg. and/or pitch-contg. substances on the surface of the lining at predetermined temps. pref. the protective glaze consists essentially of 5-25 % (11 %) Al2O3, 30-70 % (53 %) SiO2, 5-25 % (10%) alkalies and 5-15 % (9%) B2C3. Pref. the glazing is resistant to temps. up to 700-900 deg. C. USE/ADVANTAGE - The protective glaze prevents burning off carbonaceous material from the surface of the refractory lining and incr eases its slag resistance and its durability in service.

Description

Die Erfindung betrifft eine feuerfeste Auskleidung, insbeson­ dere für Industrieöfen, mit Beimengungen kohlenstoffhaltiger und/oder teerhaltiger und/oder pechhaltiger Substanzen.The invention relates to a refractory lining, in particular for industrial furnaces, with admixtures containing carbon and / or tar-containing and / or pitch-containing substances.

Bei der Verwendung von Dolomit- oder Magnesitbaustoffen zur Auskleidung von Industrieöfen sind diese mit kohlenstoffhal­ tigen, teerhaltigen und/oder pechhaltigen Substanzen durch­ tränkt, um sie vor Feuchtigkeit zu schützen. Die Beimengungen sind aber auch für den eigentlichen betrieblichen Vorgang von Vorteil, da sie die Schlackenbeständigkeit und Haltbarkeit der feuerfesten Auskleidung erhöhen.When using dolomite or magnesite building materials Industrial furnaces are lined with carbon term, tar-containing and / or pitch-containing substances soaks to protect them from moisture. The admixtures are also responsible for the actual operational process of Advantage as it has the slag resistance and durability of the increase fireproof lining.

Aufgrund der in Industrieöfen herrschenden hohen Temperaturen werden die kohlenstoffhaltigen Substanzen im Bereich der Oberfläche an der heißen Seite jedoch frühzeitig, d. h. bereits beim ersten Aufheizen ausgebrannt, so daß ihre schützende Wirkung für den weiteren betrieblichen Prozeß verlorengeht. Because of the high temperatures prevailing in industrial furnaces the carbonaceous substances in the area of Surface on the hot side early, however. H. already burned out the first time you heat it, so its protective Effect for the further operational process is lost.  

Dadurch wird das gewünschte Standverhalten der Auskleidung erheblich beeinträchtigt.This ensures the desired stance of the lining significantly affected.

Aufgabe der Erfindung ist es daher, eine feuerfeste Auskleidung der eingangs genannten Art zu schaffen, die ein frühzeitiges Ausbrennen der kohlenstoffhaltigen Substanzen verhindert und damit die Haltbarkeit der feuerfesten Einbauten erhöht.The object of the invention is therefore a refractory lining of the type mentioned at the beginning, which create an early Prevents burnout of the carbonaceous substances and thus increasing the durability of the refractory internals.

Diese Aufgabe wird erfindungsgemäß im wesentlichen dadurch gelöst, daß auf der Oberfläche der Auskleidung eine Schutz­ glasur aufgebracht ist, die den Abbrand der kohlenstoff-, teer- und/oder pechhaltigen Substanzen an der Oberfläche der Aus­ kleidung verhindert. Durch die Schutzglasur wird die Ausklei­ dung zumindest während des ersten Aufheizens soweit "ver­ siegelt", daß die kohlenstoffhaltigen Substanzen nicht vor­ zeitig ausbrennen können. Zweckmäßigerweise wird die Schutz­ glasur durch Spachteln, Streichen oder Spritzen auf das fertig zugestellte Mauerwerk aufgebracht. Dadurch wird erfindungsgemäß sichergestellt, daß die gesamte Oberfläche der Auskleidung von der Schutzglasur abgedeckt wird und die kohlenstoff-, teer- und/oder pechhaltigen Substanzen nicht durch eventuelle Fugen zwischen der Auskleidung austreten können.This object is essentially achieved according to the invention solved that on the surface of the liner a protection glaze is applied, which burns the carbon, tar and / or pitch-containing substances on the surface of the Aus clothes prevented. Through the protective glaze the stripping at least during the first heating up as far as "ver seals "that the carbonaceous substances do not exist can burn out early. Protection is expedient Glaze by filling, brushing or spraying on the finished delivered masonry applied. This is according to the invention ensured that the entire surface of the liner from the protective glaze is covered and the carbon, tar and / or substances containing pitch not through possible joints can leak between the linings.

Gemäß einer bevorzugten Ausführungsform der Erfindung weist die Schutzglasur im wesentlichen 5 bis 25% Al2O3, 30 bis 70% SiO2, 5 bis 25% Alkalien und und 5 bis 15% B2O3 auf.According to a preferred embodiment of the invention, the protective glaze comprises essentially 5 to 25% Al 2 O 3 , 30 to 70% SiO 2 , 5 to 25% alkalis and and 5 to 15% B 2 O 3 .

Eine besonders wirkungsvolle Schutzglasur weist 11% Al2O3, 53% SiO2, 10% Alkalien und 9% B2O3 auf. Durch Änderung des B2O3-Anteils läßt sich erfindungsgemäß der Temperaturbereich, bis zu dem die Schutzglasur beständig ist, verändern. Vor­ teilhafterweise beträgt dieser Temperaturbereich etwa 700 bis 900°C. A particularly effective protective glaze has 11% Al 2 O 3 , 53% SiO 2 , 10% alkalis and 9% B 2 O 3 . By changing the B 2 O 3 content, the temperature range up to which the protective glaze is resistant can be changed according to the invention. Before geous enough, this temperature range is about 700 to 900 ° C.

Weiterbildungen, Vorteile und Anwendungsmöglichkeiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles. Dabei bilden alle beschriebenen Merkmale für sich oder in beliebiger Kombination den Gegen­ stand der Erfindung, unabhängig von ihrer Zusammenfassung in den Ansprüchen oder deren Rückbeziehung.Further training, advantages and possible uses of Invention result from the following description of an embodiment. Thereby form all described Features for themselves or in any combination the opposite stood of the invention, regardless of its summary in the claims or their relationship.

Für die Auskleidung von Industrieöfen werden Einbauten aus Dolomit- oder Magnesitbaustoffen verwendet, welche mit kohlen­ stoff-, teer- und/oder pechhaltigen Substanzen durchtränkt sind, um die Auskleidung vor dem Einfluß von Feuchtigkeit zu schützen. Diese Beimengungen sind auch für den betrieblichen Vorgang von Vorteil, da sie die Schlackenbeständigkeit und die Haltbarkeit der feuerfesten Auskleidung erhöhen. Nach erfolg­ ter Einmauerung der Auskleidung in den Industrieofen wird eine Schutzglasur, die bestimmungsgemäß bis zu einer Temperatur von ca. 700°C hitzbeständig ist, durch Spachteln, Streichen oder Spritzen auf die Auskleidung aufgebracht.Internals are made for the lining of industrial furnaces Dolomite or magnesite building materials used, which with coal impregnated with substances containing tar and / or pitch are to protect the liner from the influence of moisture protect. These additions are also for the company This is advantageous because it improves the resistance to slag and the Increase the durability of the refractory lining. After success The lining of the lining in the industrial furnace becomes a Protective glaze, which is intended up to a temperature of approx. 700 ° C is heat-resistant, by filling, brushing or Syringes applied to the liner.

Die Hauptkomponenten der Schutzglasur sind Al2O3, SiO2, Al­ kalien und B2O3. Diese sind in folgendem Verhältnis vorge­ sehen: 5 bis 25% Al2O3, 30 bis 70% SiO2, 5 bis 25% Alkalien und 5 bis 15% B2O3.The main components of the protective glaze are Al 2 O 3 , SiO 2 , Al kalien and B 2 O 3 . These are provided in the following ratio: 5 to 25% Al 2 O 3 , 30 to 70% SiO 2 , 5 to 25% alkalis and 5 to 15% B 2 O 3 .

Durch eine derartige Schutzglasur wird die Auskleidung in dem Industrieofen insofern versiegelt, daß die in den Einbauten enthaltenen kohlenstoff-, teer- und/oder pechhaltigen Sub­ stanzen nicht bereits beim ersten Aufheizen ausgebrannt werden und damit im weiteren betrieblichen Prozeß die Schlackenbe­ ständigkeit und Haltbarkeit der feuerfesten Auskleidung er­ höhen.With such a protective glaze, the lining in the Industrial furnace sealed in that the built-in contained carbon, tar and / or pitch-containing sub not be burned out during the first heating and thus the slag in the further operational process durability and durability of the refractory lining heights.

Claims (5)

1. Feuerfeste Auskleidung, insbesondere für Industrieöfen, mit Beimengungen kohlenstoffhaltiger und/oder teerhaltiger und/oder pechhaltiger Substanzen, dadurch gekennzeichnet, daß auf der Oberfläche der Auskleidung eine Schutzglasur aufge­ bracht ist, die den Abbrand der kohlenstoff-, teer- und/oder pechhaltigen Substanzen an der Oberfläche der Auskleidung in einem vorbestimmten Temperaturbereich verhindert.1. Refractory lining, in particular for industrial furnaces, with admixtures of carbon-containing and / or tar-containing and / or pitch-containing substances, characterized in that a protective glaze is applied to the surface of the lining, which burns off the carbon-, tar- and / or pitch-containing Prevents substances on the surface of the liner in a predetermined temperature range. 2. Feuerfeste Auskleidung nach Anspruch 1 , dadurch gekenn­ zeichnet, daß die Schutzglasur im wesentlichen 5 bis 25% Al2O3, 30 bis 70% SiO2, 5 bis 25% Alkalien und 5 bis 15% B2O3 aufweist.2. Refractory lining according to claim 1, characterized in that the protective glaze has essentially 5 to 25% Al 2 O 3 , 30 to 70% SiO 2 , 5 to 25% alkalis and 5 to 15% B 2 O 3 . 3. Feuerfeste Auskleidung nach Anspruch 2, dadurch gekenn­ zeichnet, daß die Schutzglasur im wesentlichen 11% Al2O3, 53% SiO2, 10% Alkalien und 9% B2O3 aufweist.3. Refractory lining according to claim 2, characterized in that the protective glaze has essentially 11% Al 2 O 3 , 53% SiO 2 , 10% alkalis and 9% B 2 O 3 . 4. Feuerfeste Auskleidung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Temperaturbereich, bis zu dem die Schutzglasur beständig ist, durch Veränderung des B2O3- Anteils veränderbar ist.4. Refractory lining according to one of claims 1 to 3, characterized in that the temperature range up to which the protective glaze is resistant can be changed by changing the B 2 O 3 content. 5. Feuerfeste Auskleidung nach Anspruch 4, dadurch gekenn­ zeichnet, daß der Temperaturbereich, bis zu dem die Schutz­ glasur beständig ist, etwa 700 bis 900°C beträgt.5. Refractory lining according to claim 4, characterized records that the temperature range up to which the protection glaze is resistant, is about 700 to 900 ° C.
DE4216934A 1992-05-22 1992-05-22 Protective glaze for refractory furnace linings contg. carbonaceous material - prevents burning-off of carbon substances at the surface of the lining at predetermined temps. Withdrawn DE4216934A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4216934A DE4216934A1 (en) 1992-05-22 1992-05-22 Protective glaze for refractory furnace linings contg. carbonaceous material - prevents burning-off of carbon substances at the surface of the lining at predetermined temps.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4216934A DE4216934A1 (en) 1992-05-22 1992-05-22 Protective glaze for refractory furnace linings contg. carbonaceous material - prevents burning-off of carbon substances at the surface of the lining at predetermined temps.

Publications (1)

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DE4216934A1 true DE4216934A1 (en) 1993-11-25

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DE4216934A Withdrawn DE4216934A1 (en) 1992-05-22 1992-05-22 Protective glaze for refractory furnace linings contg. carbonaceous material - prevents burning-off of carbon substances at the surface of the lining at predetermined temps.

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0773203A4 (en) * 1994-05-17 1997-04-01 Asahi Chemical Company Ltd Glazing layer forming composition for hot coating of oven refractory and method of forming glazing layer
WO2001027048A1 (en) * 1999-10-14 2001-04-19 Vesuvius Crucible Company Carbon-containing refractory article having a protective coating
WO2002102739A1 (en) * 2000-05-24 2002-12-27 Fosbel Intellectual Ag Process for forming a vitreous layer on a refractory surface

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0773203A4 (en) * 1994-05-17 1997-04-01 Asahi Chemical Company Ltd Glazing layer forming composition for hot coating of oven refractory and method of forming glazing layer
EP0773203A1 (en) * 1994-05-17 1997-05-14 Asahi Chemical Company, Limited Glazing layer forming composition for hot coating of oven refractory and method of forming glazing layer
US6096432A (en) * 1994-05-17 2000-08-01 Asahi Chemical Company, Limited Glazing layer-forming composition for hot-coating of furnace refractories and method of forming glazing layer
WO2001027048A1 (en) * 1999-10-14 2001-04-19 Vesuvius Crucible Company Carbon-containing refractory article having a protective coating
WO2002102739A1 (en) * 2000-05-24 2002-12-27 Fosbel Intellectual Ag Process for forming a vitreous layer on a refractory surface

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