DE3539651A1 - Application of a wear-resistant layer to a furnace lining - Google Patents
Application of a wear-resistant layer to a furnace liningInfo
- Publication number
- DE3539651A1 DE3539651A1 DE19853539651 DE3539651A DE3539651A1 DE 3539651 A1 DE3539651 A1 DE 3539651A1 DE 19853539651 DE19853539651 DE 19853539651 DE 3539651 A DE3539651 A DE 3539651A DE 3539651 A1 DE3539651 A1 DE 3539651A1
- Authority
- DE
- Germany
- Prior art keywords
- wear
- furnace lining
- resistant layer
- application
- flame spraying
- 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- Withdrawn
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
- 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
- C04B41/5025—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 ceramic materials
-
- 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
- C04B41/87—Ceramics
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- General Engineering & Computer Science (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
Die Erfindung betrifft ein thermisches Verfahren zum Aufbringen pulverförmiger Hartstoffe als Verschleiß- Schutzschicht auf einer keramischen Ofenzustellung.The invention relates to a thermal process for Applying powdery hard materials as wear Protective layer on a ceramic furnace delivery.
Bekannt ist es aus DE-AS 20 45 189, eine Ausgußdüse aus Magnesiumoxyd für einen Schmelzofen zu bedampfen mit Titanverbindungen durch Plasmaspritzen. Dieses Verfahren ist extrem teuer und nur anwendbar auf rotationssymmetrische Zustellungen, weil zur Erzielung einer gleichmäßig dicken Schutzschicht die Elektrode am Plasma-Austrittsende vom sie umgebenden Werkstück allseits einen gleichen Abstand halten muß. Andererseits sind pulverförmige Titan-Mineralien wegen des hohen Schmelzpunktes anders als im Plasmaspritzverfahren nicht zu verarbeiten. Dieses Verfahren ist an eine entsprechend ausgerüstete Fabrik gebunden. Aufgabe der Erfindung ist es dem gegenüber, ein thermisches Verfahren zum Aufbringen pulverförmiger Hartstoffe als Verschleiß-Schutzschicht auf einer beliebig geformten keramischen Ofenzustellung mit möglichst geringem Aufwand anzugeben.It is known from DE-AS 20 45 189, a pouring nozzle To vaporize magnesium oxide for a furnace Titanium compounds by plasma spraying. This method is extremely expensive and only applicable to rotationally symmetrical Deliveries because to achieve an even thick protective layer the electrode at the plasma exit end the same from all around the workpiece Must keep distance. On the other hand are powdery Titanium minerals are different because of the high melting point than not to be processed in the plasma spraying process. This The process is tied to a suitably equipped factory. The object of the invention is a thermal Process for applying powdery hard materials as a wear protection layer on any shaped ceramic furnace delivery with as much as possible to specify little effort.
Dazu wird erfindungsgemäß vorgeschlagen, daß Oxyde von Aluminium, Magnesium, Kalium, Calzium, Zircon, Ytrium oder Mischungen daraus durch Flammspritzen auf die vorher gerauhte im wesentlichen aus Al2O3 und/oder SiO2 bestehende Zustellung gebracht werden, bis eine Schichtdicke zwischen 150 und 200 µm erreicht ist. Das Flammspritzen kann problemlos auch am Einbauort in schon installierte Öfen vorgenommen werden. Das vorherige Aufrauhen der Zustellungs-Oberfläche bewirkt, daß die dünne Schutzschicht durch das Flammspritzen einerseits gut verankert wird und andererseits porös ist. So werden Abplatzungen durch den Temperaturgang im späteren Ofenbetrieb zuverlässig vermieden. Wegen der geringen Adhäsion solcher Beschichtungen gegenüber dem Material des Werkstücks, etwa der in einem Aluminium-Schmelzbad enthaltenen sauren Schlacke, wird die Zustellung auch gegen chemische Aggression gut geschützt.For this purpose, it is proposed according to the invention that oxides of aluminum, magnesium, potassium, calcium, zircon, ytrium or mixtures thereof are brought onto the previously roughened feed consisting essentially of Al 2 O 3 and / or SiO 2 by flame spraying until a layer thickness of between 150 and 200 µm is reached. Flame spraying can also be easily carried out at the installation location in already installed ovens. The previous roughening of the infeed surface causes the thin protective layer to be well anchored on the one hand by the flame spraying and on the other hand to be porous. This reliably prevents flaking caused by the temperature change in subsequent furnace operation. Due to the low adhesion of such coatings to the material of the workpiece, such as the acidic slag contained in an aluminum melt bath, the delivery is also well protected against chemical aggression.
Die Erfindung wird anhand von Ausführungsbeispielen weiter erläutert.The invention is based on exemplary embodiments explained further.
Ein Probekörper aus feuerfester Stampfmasse mit einer Rohdichte von 1,9 t/cbm aus 23% Al2O3, 67% SiO2, 5,3% P2O5, wurde leicht sandgestrahlt. Dann wurde pulverisiertes Calziumzirkonat (70% CaO, 30% ZrO2) mit einem transportablen Flammspritzgerät bei einer Temperatur von 3200°C im Flammenkern auf den Probekörper gespritzt, bis überall eine Schichtdicke zwischen 150 und 200 µm erreicht war. Gegenüber einem gleichen Probekörper ohne diese Beschichtung wurde im Betrieb eine erheblich langsamere mechanische Abnutzung festgestellt und eine weitgehende Unempfindlichkeit gegen chemische Aggressionen insbesondere von Al-Schmelzbädern, deren saure Schlacke insoweit recht problematisch ist.A test piece made of refractory ramming mass with a bulk density of 1.9 t / cbm made of 23% Al 2 O 3 , 67% SiO 2 , 5.3% P 2 O 5 was lightly sandblasted. Then powdered calcium zirconate (70% CaO, 30% ZrO 2 ) was sprayed onto the test specimen with a portable flame spraying device at a temperature of 3200 ° C in the flame core until a layer thickness between 150 and 200 µm was reached. Compared to the same specimen without this coating, mechanical wear was found to be considerably slower during operation and largely insensitive to chemical aggressions, especially of Al molten baths, the acidic slag of which is quite problematic.
Ein gleicher Probekörper wurde nach dem Sandstrahlen im entsprechenden Flammspritzverfahren mit einer gleichdicken Schutzschicht aus 94% Al2O3, 2,5% TiO, Rest andere Metalloxyde versehen, mit entsprechend vorteilhaftem Ergebnis.After sandblasting, the same test specimen was provided with a protective layer of 94% Al 2 O 3 , 2.5% TiO, the rest of other metal oxides with the same thickness, with a correspondingly advantageous result.
Ein gleicher Probekörper wurde nach dem Sandstrahlen durch entsprechendes Flammspritzen eines Pulvers aus Mg-Al-Spinellen (72% Al2O3, 28% MgO) versehen, mit entsprechend gutem Ergebnis.An identical test specimen was provided after sandblasting by correspondingly flame spraying a powder of Mg-Al spinels (72% Al 2 O 3 , 28% MgO), with a correspondingly good result.
Ein gleicher Probekörper wurde nach dem Sandstrahlen durch Flammspritzen von pulverisiertem chemisch reinem Al2O3 (99,5%, Rest andere Oxyde) geschützt, mit gleich vorteilhaftem Endergebnis.The same test specimen was protected after sandblasting by flame spraying powdered chemically pure Al 2 O 3 (99.5%, the rest other oxides), with the same advantageous end result.
Es wurde ein Probekörper hergestellt aus Stampfmasse mit einer Rohdichte von 3,1 t/cbm, enthaltend 93% Al2O3 und 5,3% SiO2. Die nach dem Sandstrahlen wie nach den vorhergehenden Beispielen aufgespritzte Schutzschicht bestand aus 92% Zirkondioxyd und 8% Ca2Co3, gleich gutes Ergebnis.A test specimen was produced from ramming mass with a bulk density of 3.1 t / cbm, containing 93% Al 2 O 3 and 5.3% SiO 2 . The protective layer sprayed on after sandblasting as in the previous examples consisted of 92% zirconium dioxide and 8% Ca 2 Co 3 , the same result.
Ein Probekörper nach Beispiel 5 wurde im entsprechenden Verfahren mit einer Schutzschicht versehen aus chemisch reinem (99,9%) Al2O3. Das damit erreichte gleich gute Ergebnis dürfte darauf beruhen, daß für alle Probekörper, wie in der Feuerfesttechnik üblich, zur Kostenersparnis weitgehend naturbelassenes Al2O3 verwendet wurde, dessen Beimischungen die Adhäsion und auch chemische Aggression der schmelzflüssigen Schlacke begünstigen. Für den erfindungsgemäßen Schutzüberzug wird so wenig Material benötigt, daß dessen Reinigungskosten nicht ins Gewicht fallen.A test specimen according to Example 5 was provided with a protective layer of chemically pure (99.9%) Al 2 O 3 in the corresponding method. The equally good result achieved is likely to be based on the fact that, as is customary in refractory technology, largely natural Al 2 O 3 was used to save costs, the admixtures of which favor the adhesion and chemical aggression of the molten slag. So little material is required for the protective coating according to the invention that its cleaning costs are insignificant.
Auf einen Probekörper entsprechend Beispiel 5 wurde nach dem Sandstrahlen im Flammspritzverfahren eine Schutzschicht aus pulverisiertem Calziumzirkonat gebracht, mit gleich günstigem Ergebnis.On a test piece according to Example 5 was after sandblasting in a flame spraying process Protective layer made of powdered calcium zirconate brought, with equally favorable result.
Auf einen Probekörper entsprechend Beispiel 5 wurde eine Mischung aus pulverisiertem Zirkondioxyd 80% und Ytriumoxyd 20% flammgespritzt, mit gleich gutem Ergebnis.On a test piece according to Example 5 was a mixture of powdered zirconia 80% and ytrium oxide 20% flame-sprayed, with equally good Result.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853539651 DE3539651A1 (en) | 1985-11-08 | 1985-11-08 | Application of a wear-resistant layer to a furnace lining |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853539651 DE3539651A1 (en) | 1985-11-08 | 1985-11-08 | Application of a wear-resistant layer to a furnace lining |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3539651A1 true DE3539651A1 (en) | 1987-05-14 |
Family
ID=6285481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19853539651 Withdrawn DE3539651A1 (en) | 1985-11-08 | 1985-11-08 | Application of a wear-resistant layer to a furnace lining |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3539651A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LT3078B (en) | 1992-12-16 | 1994-11-25 | Schuetz Werke Gmbh Co Kg | Multiple using plastic barrel, method for making the same and method for reconditioning |
WO1996001237A1 (en) * | 1994-07-02 | 1996-01-18 | Steag Aktiengesellschaft | Material for use in high-temperature firing plants |
US7462255B2 (en) * | 2002-06-14 | 2008-12-09 | Technische Universitaet Dresden | Method for producing by laser gastight and high-temperature resistant connections of shaped parts made of a non-oxidic ceramic |
DE102014008892A1 (en) | 2014-06-12 | 2015-12-17 | Technische Universität Bergakademie Freiberg | Process for improving the thermal shock resistance of refractory products |
-
1985
- 1985-11-08 DE DE19853539651 patent/DE3539651A1/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LT3078B (en) | 1992-12-16 | 1994-11-25 | Schuetz Werke Gmbh Co Kg | Multiple using plastic barrel, method for making the same and method for reconditioning |
WO1996001237A1 (en) * | 1994-07-02 | 1996-01-18 | Steag Aktiengesellschaft | Material for use in high-temperature firing plants |
US7462255B2 (en) * | 2002-06-14 | 2008-12-09 | Technische Universitaet Dresden | Method for producing by laser gastight and high-temperature resistant connections of shaped parts made of a non-oxidic ceramic |
DE102014008892A1 (en) | 2014-06-12 | 2015-12-17 | Technische Universität Bergakademie Freiberg | Process for improving the thermal shock resistance of refractory products |
DE102014008892B4 (en) | 2014-06-12 | 2019-10-10 | Technische Universität Bergakademie Freiberg | Process for improving the thermal shock resistance of refractory products |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |