DE667440C - Electric arc furnace - Google Patents
Electric arc furnaceInfo
- Publication number
- DE667440C DE667440C DEH146440D DEH0146440D DE667440C DE 667440 C DE667440 C DE 667440C DE H146440 D DEH146440 D DE H146440D DE H0146440 D DEH0146440 D DE H0146440D DE 667440 C DE667440 C DE 667440C
- Authority
- DE
- Germany
- Prior art keywords
- arc furnace
- vault
- electrodes
- stones
- electric arc
- 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
Links
Classifications
-
- 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
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/08—Heating by electric discharge, e.g. arc discharge
- F27D11/10—Disposition of electrodes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
- C22B4/08—Apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M7/00—Doors
- F23M7/02—Frames therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/12—Working chambers or casings; Supports therefor
- F27B3/16—Walls; Roofs
-
- 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
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/08—Heating by electric discharge, e.g. arc discharge
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B7/00—Heating by electric discharge
- H05B7/18—Heating by arc discharge
- H05B7/20—Direct heating by arc discharge, i.e. where at least one end of the arc directly acts on the material to be heated, including additional resistance heating by arc current flowing through the material to be heated
Description
Elektrischer Lichtbogenofen Die Erfindung bezieht sich auf einen eleh@-: trischen Lichtbogenofen mit direkter Heizung durch Elektroden und einem aus mehreren Steinen bestehenden, die Elektroden umschließenden Deckelgewölbe und ist dadurch gekennzeichnet, daß das Gewölbe aus einem starren Ringrahmen besteht, der mindestens drei je mehrere Steine umfassende Teilsegmente umschließt, die durch zwischen dem Ringrahmen und den Teilsegmenten angeordnete nachgiebige Organe gegen die Gewölbesteine gepreßt werden. Die Teilsegmente können mittels Federn gegen die Gewölbesteine gepreßt werden.Electric arc furnace The invention relates to an eleh @ -: tric electric arc furnace with direct heating by electrodes and one of several Stones existing, the electrodes enclosing the lid vault and is thereby characterized in that the vault consists of a rigid ring frame which at least enclosing three subsegments, each comprising several stones, which by between the Ring frame and the sub-segments arranged flexible organs against the arch stones be pressed. The subsegments can be pressed against the arch stones by means of springs will.
Die bekannten Lichtbogenöfen weisen den Nachteil auf, daß bei ungleichmäßiger Wärmeausdehnung der Elektroden des in einen starren Rahmen eingesetzten Gewölbes die Elektroden in :dem sie umgebenden Gewölbe festgeklemmt werden. Solche Betriebsstörungen werden durch die Erfindung vermieden.The known arc furnaces have the disadvantage that with uneven Thermal expansion of the electrodes of the vault inserted in a rigid frame the electrodes are clamped in the surrounding vault. Such malfunctions are avoided by the invention.
Ein Ausführungsbeispiel der Erfindung ist in .der Zeichnung vereinfacht dargestellt. Fig. i zeigt einen Querschnitt des Lichtbogenofens.An embodiment of the invention is simplified in the drawing shown. Fig. I shows a cross section of the electric arc furnace.
Fig. 2 veranschaulicht auf der einen Hälfte einen Schnitt durch den Ofendeckel und auf der anderen Hälfte eine Draufsicht auf den Deckel.Fig. 2 illustrates on one half a section through the Oven lid and on the other half a top view of the lid.
Der Lichtbogenofen weist einen Tiegel i, eine Wiege 2, einen Deckel 3, die Elektroden ¢ und den Elektrodenhalter 5 auf.The arc furnace has a crucible i, a cradle 2, and a lid 3, the electrodes ¢ and the electrode holder 5.
Der Deckel 3 ist aus einzelnen Steinen 12 zusammengesetzt, welche aus feuerfestem Baustoff, z. B. Silikat, bestehen. Zur Durchführung der Elektroden sind in den Steinen 13 Öffnungen 14 vorgesehen.The lid 3 is composed of individual stones 12, which are made of refractory material, for. B. silicate exist. To lead through the electrodes 13 openings 14 are provided in the stones.
Der Deckel besteht aus einem starren Ringrahmen i-5, der das Deckelgewölbe transportfähig macht, ferner sechs zentrisch wirkenden Teilsegmenten 16 und aus zwischen den Flanschen 17 des starren Ringrahmens 15 und den Teilsegmenten 16 angeordneten Federn 18. Jedes Teilsegment 16 umfaßt mehrere Steine und wird durch die Federn 18 und Bolzen i9 nachgiebig gehalten.The lid consists of a rigid ring frame i-5 that forms the lid vault makes transportable, also six centrally acting subsegments 16 and off arranged between the flanges 17 of the rigid ring frame 15 and the subsegments 16 Springs 18. Each subsegment 16 comprises several stones and is supported by the springs 18 and bolt i9 held resiliently.
Bei Erwärmung der durch das Deckelgewölbe hindurchgehenden Elektroden dehnen sich die Steine 12 aus, so daß die Teilsegmente 16 nach außen gedrückt werden. Da die Teilsegmente elastisch mit dem starren Ring-''tirper verbunden sind, können die Steine bei ungleichmäßiger Wärmeausdehnung des Gewölbes sich nicht so verschieben, daß ein Festklemmen der Elektroden q. in den Öffnungen 14 eintritt. Auch die Druckbeanspruchung der einzelnen Steine wird vergleichmäßigt, so daß die Beschädigungen infolge zu großer Spannungen vermieden werden.When the electrodes passing through the vault of the lid are heated the stones 12 expand so that the subsegments 16 are pressed outward. Since the subsegments are elastically connected to the rigid ring - '' tirper can the stones do not shift in such a way if the thermal expansion of the vault is uneven, that clamping of the electrodes q. enters the openings 14. Also the compressive stress the individual stones is evened out, so that the damage as a result large tensions can be avoided.
Während des Abkühlens -werden die Deckelsteine in ihrem Gefüge nicht aufgelockert, weil die Teilsegmente 16 zufolge ihrer elastischen Verbindung mit dem Rahmen 15 nach innen gedrückt -werden. Um eine zu große Ausdehnung des Gewölbes nach außen bzw. eine zu große Zusammenschrumpfung nach innen zu verhindern, können die Bolzen i9 mit Anschlägen versehen -werden, durch welche ein Ausdehnen bzw. ein Zusammenschrumpfen der Steine begrenzt -wird.During the cooling process, the lid stones do not become in their structure loosened because the subsegments 16 due to their elastic connection with the frame 15 -be pressed inward. Too great an expansion of the vault to the outside or to prevent too great a shrinkage inside, can the bolts i9 are provided with stops, by means of which an expansion or a Shrinkage of the stones is limited.
Aii Stelle von über Bolzen wirkende Federn können als nachgiebige Organe . unter Umständen auch hydraulische oder pneumatische Vorrichtungen, -welche das Gewölbe nachgiebig umspannen, verwendet werden. Sie können dann aus einem Zylinder mit Kolben bestehen, der durch ein flüssiges oder gasförmiges Druckmittel betätigt über einen Bolzen das betreffende Teilsegment in seiner Lage festhält. Der starre Ringrahmen kann aus mehreren Teilen bestehen, die durch Verschraubung oder Verschweißung miteinander verbunden sind. -Aii point of springs acting via bolts can be considered resilient Organs . possibly also hydraulic or pneumatic devices, -which to encircle the vault in a flexible manner. You can then get out of a cylinder consist of a piston that is actuated by a liquid or gaseous pressure medium holds the relevant sub-segment in its position via a bolt. The rigid one Ring frame can consist of several parts that are screwed or welded are connected to each other. -
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH146440D DE667440C (en) | Electric arc furnace |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH146440D DE667440C (en) | Electric arc furnace |
Publications (1)
Publication Number | Publication Date |
---|---|
DE667440C true DE667440C (en) | 1938-11-11 |
Family
ID=7179947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEH146440D Expired DE667440C (en) | Electric arc furnace |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE667440C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE767564C (en) * | 1938-01-18 | 1952-12-08 | Ver Korkindustrie A G | Removable cover for industrial furnaces, exhaust systems or the like. |
DE874146C (en) * | 1943-05-14 | 1953-04-20 | Ofu Ofenbau Union G M B H | Mobile vaulted cover for open ovens |
-
0
- DE DEH146440D patent/DE667440C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE767564C (en) * | 1938-01-18 | 1952-12-08 | Ver Korkindustrie A G | Removable cover for industrial furnaces, exhaust systems or the like. |
DE874146C (en) * | 1943-05-14 | 1953-04-20 | Ofu Ofenbau Union G M B H | Mobile vaulted cover for open ovens |
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