DE10312841B3 - Use of granular or dust-like carbonaceous waste material as fuel for anode baking ovens for producing primary aluminum - Google Patents

Use of granular or dust-like carbonaceous waste material as fuel for anode baking ovens for producing primary aluminum Download PDF

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Publication number
DE10312841B3
DE10312841B3 DE2003112841 DE10312841A DE10312841B3 DE 10312841 B3 DE10312841 B3 DE 10312841B3 DE 2003112841 DE2003112841 DE 2003112841 DE 10312841 A DE10312841 A DE 10312841A DE 10312841 B3 DE10312841 B3 DE 10312841B3
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Prior art keywords
waste material
anode
granular
fuel
dust
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Expired - Fee Related
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DE2003112841
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German (de)
Inventor
Michael Schneider
Christian Krupp
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Voerde Aluminium GmbH
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Corus Aluminium Voerde GmbH
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Priority to DE2003112841 priority Critical patent/DE10312841B3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00—Waste feed arrangements
    • F23G2205/20—Waste feed arrangements using airblast or pneumatic feeding

Abstract

Use of granular or dust-like carbonaceous waste material as fuel for anode baking ovens is new. An Independent claim is also included for an anode baking oven having a feed unit for the granular or dust-like carbonaceous waste material, in which the temperature of the oven lies above the ignition temperature of the waste material.

Description

Die Erfindung betrifft die Verwendung von körnigem oder staubförmigem kohlenstoffhaltigen Abfallmaterial sowie einen Anodenbrennofen für diese Verwendung.The invention relates to the use of granular or dusty carbon-containing waste material and an anode furnace for this Use.

Zur Herstellung von Kohlenstoffanoden, die in Elektrolysezellen zur Herstellung von Primäraluminium eingesetzt werden, ist es zunächst erforderlich, aus körnigem Kohlenstoffmaterial, bestehend aus Petrolkoks, Resten von gebrauchten Anoden sowie Pech, einen sogenannten Grünkörper zu formen. Hierzu wird das Kohlenstoffmaterial in eine Form eingefüllt und darin zu dem Grünkörper verdichtet. Anschließend wird der Grünkörper in einem Anodenbrennofen gebrannt (Ullmann's Encyclopaedia of Industrial Chemistry, 6. Aufl., 2003, Band 2, S. 232 f sowie Band 6, S. 303 bis 310). Zur Befeuerung von Anodenbrennöfen werden im Stand der Technik Erdgas oder Heizöle verwendet.For the production of carbon anodes, those in electrolytic cells for the production of primary aluminum be used, it is initially required from granular Carbon material consisting of petroleum coke, remnants of used Anodes and bad luck to form a so-called green body. To do this the carbon material is filled into a mold and compressed into the green body. Subsequently the green body in an anode furnace (Ullmann's Encyclopaedia of Industrial Chemistry, 6th ed., 2003, volume 2, pp. 232 f and volume 6, pp. 303 to 310). For firing anode furnaces natural gas or heating oils are used in the prior art.

Bei der Herstellung, Handhabung und Zerkleinerung von Kohlenstoffanoden sowie bei der Reinigung von Anodenüberresten entstehen erhebliche Mengen an feinkörnigem oder staubförmigem Abfallmaterial. Entsprechendes Material sammelt sich auch in Filtern. Solches Abfallmaterial ist schwierig zu handhaben und in der Regel wegen der in ihm enthaltenen Verunreinigungen ungeeignet für die Wiederverwendung bei der Herstellung von Kohlenstoffanoden. Das Abfallmaterial wird deshalb auf Deponien entsorgt. Alternativ dazu ist vorgeschlagen worden, dieses Abfallmaterial nach einer bestimmten Aufarbeitung als Packungsmaterial, Anodenmasse oder Kragenmasse zu verwenden ( EP 0 870 078 B1 , DE 199 49 868 A1 ).The production, handling and shredding of carbon anodes and the cleaning of anode remains generate considerable amounts of fine-grained or dust-like waste material. Corresponding material also collects in filters. Such waste material is difficult to handle and is usually unsuitable for reuse in the manufacture of carbon anodes because of the contaminants it contains. The waste material is therefore disposed of in landfills. As an alternative, it has been proposed to use this waste material as packing material, anode mass or collar mass after a certain processing ( EP 0 870 078 B1 . DE 199 49 868 A1 ).

Der Erfindung liegt die Aufgabe zugrunde, körniges oder staubförmiges kohlenstoffhaltiges Abfallmaterial nutzbringender als bisher zu verwerten, insbesondere solches Abfallmaterial, das wegen seiner chemischen Verunreinigungen nicht für die Produktion von Kohlenstoffanoden oder anderen Kohlenstoffprodukten verwendbar ist.The invention is based, granular or the task powdered carbonaceous waste material is more beneficial than before recycle, especially such waste material, because of its chemical contaminants not for the production of carbon anodes or other carbon products can be used.

Diese Aufgabe wird erfindungsgemäß durch die Verwendung dieses Abfallmaterials als Brennstoff für Anodenbrennöfen gelöst. Diese Verwendung hat den Vorzug, daß das Abfallmaterial dort, wo es anfällt, auf kurzem Weg unter Ausnutzung seines Energieinhalts ohne eine weitere Aufbereitung eingesetzt wird. Für diesen Einsatzzweck kann auch Abfallmaterial verwendet werden, das aufgrund seiner Verunreinigungen anderweitig nicht mehr oder nur nach. Durchführung einer aufwendigen Aufbereitung wiederverwendet werden könnte und deshalb deponiert werden müßte. Mit der erfindungsgemäßen Verwendung werden nicht nur die De poniekosten, sondern auch Brennstoff eingespart. Dabei kann das Abfallmaterial in Ergänzung des für die Anodenbrennöfen verwendeten Brennstoffs in Form von Erdgas oder Heizöl oder auch anstatt dieser Brennstoffe eingesetzt werden.This object is achieved by the Solved using this waste material as fuel for anode furnaces. This Use has the advantage that the Waste material where it occurs on a short path using its energy content without one further processing is used. Can be used for this purpose waste material can also be used due to its impurities otherwise no longer or only after. Carrying out a complex preparation could be reused and therefore should be deposited. With the use according to the invention not only the landfill costs are saved, but also fuel. The waste material can complement that used for the anode furnaces Fuel in the form of natural gas or heating oil or instead of this Fuels are used.

In Ausbildung der Erfindung ist vorgesehen, daß das Abfallmaterial von der Anodenherstellung, Anodenzerkleinerung oder aus Filtern stammt. Dies schließt nicht aus, daß es auch aus anderen kohlenstoffverarbeitenden Industrien gewonnen wird.In an embodiment of the invention it is provided that the waste material from anode production, anode crushing or from filters comes. This closes not from it is also obtained from other carbon processing industries.

Das Abfallmaterial wird zweckmäßigerweise in die Heizkanäle des Anodenbrennofens eingeführt, und zwar dort, wo die Temperatur im Betrieb über der Zündtemperatur des Abfallmaterials liegt, so daß das Abfallmaterial sofort verbrannt wird. Dabei kann das Abfallmaterial in den Anodenbrennofen kontinuierlich oder diskontinuierlich (gepulste Dosierung) eingeblasen werden.The waste material is conveniently in the heating channels the anode furnace, and where the operating temperature is above the ignition temperature of the waste material lies so that the waste material is burned immediately. The waste material can go into the anode furnace injected continuously or discontinuously (pulsed dosing) become.

Die Erfindung betrifft des weiteren einen Anodenbrennofen zur Durchführung des vorbeschriebenen Verfahrens. Er ist erfindungsgemäß dadurch gekennzeichnet, daß er eine Eintrageinrichtung aufweist, über die körniges oder staubförmiges kohlenstoffhaltiges Abfallmaterial einem Bereich des Anodenbrennofens zuführbar ist, wo die Temperatur beim Betrieb über der Zündtemperatur des Abfallmaterials liegt. Die Eintrageinrichtung ist vorzugsweise als kontinuierlich oder diskontinuierlich arbeitende Einblaseinrichtung ausgebildet.The invention further relates to an anode furnace to perform the procedure described above. He is according to the invention characterized that he has an entry device via which granular or dusty carbonaceous material Waste material can be fed to an area of the anode furnace, where the temperature when operating over the ignition temperature of the waste material. The entry device is preferably as continuous or discontinuous blowing device educated.

Claims (7)

Verwendung von körnigem oder staubförmigem kohlenstoffhaltigen Abfallmaterial als Brennstoff für Anodenbrennöfen.Use of granular or dusty carbonaceous Waste material as fuel for Anode baking. Verwendung nach Anspruch 1, dadurch gekennzeichnet, daß das Abfallmaterial von der Anodenherstellung, Anodenzerkleinerung oder aus Filtern stammt.Use according to claim 1, characterized in that that this Waste material from anode production, anode grinding or comes from filters. Verwendung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Abfallmaterial in Heizkanäle des Anodenbrennofens eingeführt wird.Use according to claim 1 or 2, characterized in that that this Waste material in heating ducts of the anode furnace becomes. Verwendung nach Anspruch 3, dadurch gekennzeichnet, daß das Abfallmaterial dort in den Anodenbrennofen eingeführt wird, wo die Temperatur im Betrieb über der Zündtemperatur des Abfallmaterials liegt.Use according to claim 3, characterized in that that this Waste material is introduced there into the anode furnace, where the temperature in operation over the ignition temperature of the waste material. Verwendung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Abfallmaterial in den Anodenbrennofen eingeblasen wird.Use according to one of claims 1 to 4, characterized in that that this Waste material is blown into the anode furnace. Anodenbrennofen, dadurch gekennzeichnet, daß der Anodenbrennofen eine Eintrageinrichtung aufweist, über die körniges oder staubförmiges kohlenstoffhaltiges Abfallmaterial in einen Bereich einführbar ist, wo die Temperatur im Betrieb über der Zündtemperatur des Abfallmaterials liegt.Anode furnace, characterized in that the anode furnace has an entry device through which granular or dusty carbon-containing waste material enters an area is feasible where the temperature during operation is above the ignition temperature of the waste material. Anodenbrennofen nach Anspruch 6, dadurch gekennzeichnet, daß die Eintrageinrichtung als Einblaseinrichtung ausgebildet ist.Anode furnace according to claim 6, characterized in that the Entry device is designed as a blowing device.
DE2003112841 2003-03-21 2003-03-21 Use of granular or dust-like carbonaceous waste material as fuel for anode baking ovens for producing primary aluminum Expired - Fee Related DE10312841B3 (en)

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DE2003112841 DE10312841B3 (en) 2003-03-21 2003-03-21 Use of granular or dust-like carbonaceous waste material as fuel for anode baking ovens for producing primary aluminum

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3905486A1 (en) * 1988-02-22 1989-08-31 Outokumpu Oy MELTING FURNACE AND LOADING METHOD FOR THE SAME
DE19949868A1 (en) * 1999-10-15 2001-05-03 R & D Carbon Ltd Production of carbon bodies used for anodes in molten aluminum electrolysis comprises mixing dry material and pitch to form anode material, and molding into anodes by applying various pressing forces within size tolerance region
EP0870078B1 (en) * 1995-12-15 2002-04-03 Norsk Hydro A/S A method for the use of material containing carbon in the electrolytic production of aluminium
DE69427692T2 (en) * 1993-04-06 2002-05-02 Ausmelt Ltd MELTING CARBON MATERIAL

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3905486A1 (en) * 1988-02-22 1989-08-31 Outokumpu Oy MELTING FURNACE AND LOADING METHOD FOR THE SAME
DE69427692T2 (en) * 1993-04-06 2002-05-02 Ausmelt Ltd MELTING CARBON MATERIAL
EP0870078B1 (en) * 1995-12-15 2002-04-03 Norsk Hydro A/S A method for the use of material containing carbon in the electrolytic production of aluminium
DE19949868A1 (en) * 1999-10-15 2001-05-03 R & D Carbon Ltd Production of carbon bodies used for anodes in molten aluminum electrolysis comprises mixing dry material and pitch to form anode material, and molding into anodes by applying various pressing forces within size tolerance region

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