DE684456C - Electric shaft furnace - Google Patents

Electric shaft furnace

Info

Publication number
DE684456C
DE684456C DEO22278D DEO0022278D DE684456C DE 684456 C DE684456 C DE 684456C DE O22278 D DEO22278 D DE O22278D DE O0022278 D DEO0022278 D DE O0022278D DE 684456 C DE684456 C DE 684456C
Authority
DE
Germany
Prior art keywords
shaft
shaft furnace
jacket
furnace
electric shaft
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
DEO22278D
Other languages
German (de)
Inventor
Dr Konrad Erdmann
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.)
American Magnesium Metals Corp
Original Assignee
American Magnesium Metals Corp
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 American Magnesium Metals Corp filed Critical American Magnesium Metals Corp
Application granted granted Critical
Publication of DE684456C publication Critical patent/DE684456C/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00Shaft or like vertical or substantially vertical furnaces
    • F27B1/08Shaft or like vertical or substantially vertical furnaces heated otherwise than by solid fuel mixed with charge
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C22B4/08Apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00Arrangement of elements for electric heating in or on furnaces
    • F27D11/02Ohmic resistance heating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)

Description

Elektrischer Schachtofen Den Gegenstand der Erfindung bildet ein elektrischer Schachtofen, insbesondere für direkte Widerstandsheizung, der beispielsweise für die Verarbeitung von Ofengütern geeignet ist, die zur Staubentwicklung neigen. Erreicht die Arbeitstemperatur in derartigen Schachtöfen eine solche Höhe, daß nur feuerfeste Baustoffe Verwendung finden können, so treten bei einer starren Verbindung des hocherhitzten Schachtes mit dem weitaus weniger heißen Schachtmantel infolge der ungleichen Wärmeausdehnung schädliche Spannungen im Gefüge dieser Bauteile auf.Electric shaft furnace The subject of the invention is an electric one Shaft furnace, especially for direct resistance heating, which is used, for example, for the processing of kiln products that tend to generate dust is suitable. Achieved the working temperature in such shaft furnaces is so high that only refractory Building materials can be used, so occur with a rigid connection of the highly heated Shaft with the far less hot shaft jacket due to the uneven thermal expansion harmful stresses in the structure of these components.

Gemäß der Erfindung wird die Entstehung solcher Spannungen dadurch vermieden, daß der Schacht in dem aus feuerfestem Baustoff hergestellten Mantel beweglich geführt ist. Vorzugsweise ist der Mantel gegen gespannte Federn abgestützt, um dein keramischen Werkstoff einen festeren Zusammenhalt zu geben. Um den Baukörper des Schachtes auch durch das Gewicht des Mantels nicht zu belasten, läßt man diesen letzteren vorteilhaft auf einer Unterlage aufruhen, deren Grundbau vom Ofenschacht unabhängig ist.According to the invention, the creation of such stresses thereby avoided that the shaft in the jacket made of refractory material is movably guided. The jacket is preferably supported against tensioned springs, to give your ceramic material a firmer cohesion. Around the structure of the shaft not to be burdened by the weight of the jacket, this is left the latter advantageously rest on a base, the basic structure of which is from the furnace shaft is independent.

Die Zeichnung zeigt ein Ausführungsbeispiel des erfundenen Schachtofens im Vertikalschnitt. Der Schacht weist in seinem Mittelteil eine korbartig durchbrochene Zone auf, die aus vollen Steinen r und Platten 2 in der Gestalt von Kegelmantelabschnitten aufgebaut ist. Die Platten sind an den vollen Steinen verankert, z. B. in der Weise, daß sie mit ihren Rändern in Rillen der vollen Steine eingreifen. Die korbartig durchbrochene Zone des Schachtes ist von einem gemauerten Mantel 3 umgeben, der den Sammelraum für die aus dem mittleren Schachtabschnitt austretenden Dämpfe bildet und durch einen Stutzen q. an den Kondensator angeschlossen ist.. Das Mauerwerk des Mantels ruht auf Trägern 5 und ist durch Federn 6 belastet, die sich an Trägern 7 abstützen. Da der gemauerte Mantel 3 mit dem Schacht nicht starr verbunden ist, können die am Mantel anliegenden Wandteile 8 und 9 des Schachtes sich längs der Innenwände des Mantels verschieben, so daß hierdurch die verschiedenen Längsänderungen der beiden Bauteile ausgeglichen werden.The drawing shows an embodiment of the invented shaft furnace in vertical section. The shaft has a basket-like openwork in its middle part Zone consisting of solid stones r and slabs 2 in the shape of cone shell sections is constructed. The plates are anchored to the full stones, e.g. B. in the way, that their edges engage in the grooves of the full stones. The basket-like openwork zone of the shaft is surrounded by a masonry jacket 3, the forms the collecting space for the vapors emerging from the middle section of the shaft and through a nozzle q. connected to the capacitor .. The masonry the jacket rests on girders 5 and is loaded by springs 6 which are attached to girders 7 support. Since the masonry jacket 3 is not rigidly connected to the shaft, can the adjacent to the jacket wall parts 8 and 9 of the shaft along the Move the inner walls of the jacket, so that this results in the various changes in length of the two components are balanced.

Am oberen und unteren Ende des vom Mantel 3 umgebenen Schachtabschnittes sind Elektroden aus Graphit oder Kohlenstoff angeordnet, die aus parallelen Stäben i o bestehen, welche mit ihren Enden in Ringe rr eingesetzt sind. Die Elektrodenringe sind durch entsprechend hohe Kohlenstoff- oder Graphitzylinder 12 an ringförmige Stromzuführungen 13 aus Metall angeschlossen. Die: Innenwand der Kohlenstofzylinder ist mit feuerfestem elektrischem Isoliermaterial ver-" kleidet. Unter dem Druck des Mauerwerkes-und der das Mauerwerk belastenden Federn 14 werden die Zylinder 12, die Metallscheiben 13 und die Elektrodenrahmen i 1 kräftig aneinandergepreßt, so daß sich an den Stoßstellen dieser Elemente keine Fugen ausbilden können, welche die Entstehung von Lichtbögen veranlassen würden. Infolge der Einschaltung der zylindrischen Einsatzstücke 12 zwischen den Elektroden i 1 und den metallischen Ringen 13 wird der Stromanschluß in die Vorwärmezone oberhalb der Destillationszone und in die Abkühlungszone unterhalb der Destillationszone verlegt, wo die Schachtwände keine so hohen Temperaturen an-"rrehmen, daß hierdurch die Verwendung .x#etallischer Stromzuführungen ausgeschlos-#seri wäre.At the upper and lower end of the shaft section surrounded by the jacket 3 electrodes made of graphite or carbon are arranged, which consist of parallel rods i o exist, which with their ends in rings rr are used. The electrode rings are made of appropriately high carbon or graphite cylinders 12 connected to ring-shaped power supply lines 13 made of metal. The: inner wall of the The carbon cylinder is lined with fireproof electrical insulating material. Under the pressure of the masonry and the springs 14 loading the masonry the cylinders 12, the metal disks 13 and the electrode frames i 1 are pressed firmly against one another, so that no joints can form at the joints of these elements, which would cause arcing to occur. As a result of the engagement of the cylindrical Insert pieces 12 between the electrodes i 1 and the metallic rings 13 is the power connection in the preheating zone above the distillation zone and in the Cooling zone relocated below the distillation zone, where the shaft walls do not have any so high temperatures that the use of .x # metallic power supplies excluded- # seri would be.

Claims (2)

PATENTANSPRÜCHE: 1. Elektrischer Schachtofen, insbesondere für direkte Widerstandsheizung, dadurch gekennzeichnet, daß der Schacht in dem aus feuerfestem Baustoff hergestellten Mantel beweglich geführt ist. PATENT CLAIMS: 1. Electric shaft furnace, especially for direct Resistance heating, characterized in that the shaft is made of refractory Building material made coat is movably guided. 2. Schachtofen nach Anspruch i, dadurch gekennzeichnet, daß der Mantel auf einer Unterlage aufruht, deren Qrundbatt vom Ofenschacht unabhängig ist.2. Shaft furnace according to claim i, characterized in that the coat rests on a base whose Qrundbatt is independent of the furnace shaft.
DEO22278D 1936-02-19 1936-02-26 Electric shaft furnace Expired DE684456C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT684456X 1936-02-19

Publications (1)

Publication Number Publication Date
DE684456C true DE684456C (en) 1939-11-29

Family

ID=3678976

Family Applications (1)

Application Number Title Priority Date Filing Date
DEO22278D Expired DE684456C (en) 1936-02-19 1936-02-26 Electric shaft furnace

Country Status (1)

Country Link
DE (1) DE684456C (en)

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