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EP0460632A1 - Gas- and dusthood for an electric arc furnace and process for its utilisation - Google Patents

Gas- and dusthood for an electric arc furnace and process for its utilisation Download PDF

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Publication number
EP0460632A1
EP0460632A1 EP91109184A EP91109184A EP0460632A1 EP 0460632 A1 EP0460632 A1 EP 0460632A1 EP 91109184 A EP91109184 A EP 91109184A EP 91109184 A EP91109184 A EP 91109184A EP 0460632 A1 EP0460632 A1 EP 0460632A1
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EP
European Patent Office
Prior art keywords
collecting
line
electrodes
furnace
box
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Withdrawn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
EP91109184A
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German (de)
French (fr)
Inventor
Jan Lenartowicz
Andrzej Kozubek
Wlodzimierz Magaczewski
Józef Piernikarczyk
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.)
PRZEDSIEBIORSTWO EKSPORTU BUDOWNICTWA PIECOEXPORT
Original Assignee
PRZEDSIEBIORSTWO EKSPORTU BUDOWNICTWA PIECOEXPORT
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Filing date
Publication date
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Application filed by PRZEDSIEBIORSTWO EKSPORTU BUDOWNICTWA PIECOEXPORT filed Critical PRZEDSIEBIORSTWO EKSPORTU BUDOWNICTWA PIECOEXPORT
Publication of EP0460632A1 publication Critical patent/EP0460632A1/en
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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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/30—Arrangements for extraction or collection of waste gases; Hoods therefor
    • F27D17/304—Arrangements for extraction or collection of waste gases; Hoods therefor specially adapted for electric arc furnaces
    • 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; Electric arc furnaces ; Tank furnaces
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces heated electrically, with or without any other source of heat
    • F27B3/085—Arc furnaces

Definitions

  • the invention relates to a gas and dust extraction of an electric arc furnace, with a main exhaust line provided in the furnace vault, and with a collecting box comprising the space in the area of the electrodes, formed from an additional vault, or with the individual boxes surrounding the space around the electrodes, and to a method of operating such a deduction.
  • a gas and dust extraction of the type described is known from PL-A 138 193.
  • additional vaults are supported on the furnace vault in the area of the electrodes, as a result of which the tensions in the furnace vault are increased and the durability of the furnace vault is adversely affected.
  • the direct connection of the collecting box to an overpressure line means that the air supplied is not distributed evenly over the whole box, which adversely affects the effectiveness of the extraction or extraction of gas and dust that flow from the openings surrounding the electrodes.
  • the invention has for its object to provide a gas and dust extraction of an arc furnace, by which the environment of the arc furnace is protected as best as possible from dusts and gases and the heat balance of the furnace operation is improved.
  • This task is carried out when extracting gas and dust from an arc furnace solved the first-mentioned type in that the side wall of the collecting box forms a distribution manifold with the electrodes facing openings and / or gaps, which are connected to a pressure line.
  • this object is achieved in that the side wall of each individual box forms a distribution manifold with the electrodes facing openings and / or gaps, which are connected to a pressure line.
  • the two gas and dust extractors are operated according to the invention in such a way that air and / or inert gas is fed to the collecting box or the individual collecting boxes in such an amount that the pressure in the box or boxes is at least 5 mm H2O above the pressure inside the furnace lies.
  • the gas and dust extraction according to the invention makes it possible to reliably prevent the environment of the arc furnace from being contaminated by gas and dust.
  • the sealing is more even by using distribution manifolds.
  • the cooling of both the electrodes and the furnace vault is more intensive, which increases the durability of the vault and reduces the electrode consumption during operation.
  • the use of an articulated connection of the manifold with the arms eliminates stresses caused by uncontrolled forces caused by temperature changes.
  • the throttle rings prevent dust and gas from escaping in the area of the electrodes.
  • the connection of the box or boxes with the exhaust line via one with one Valve piping allows the pressure in the box to be regulated according to the internal pressure of the furnace.
  • a line 7 which opens into the furnace vault or furnace cover 1 and which is connected via a connecting line provided with a valve 6 to a collecting overpressure box 2 which comprises the space in the region of the electrodes above the cover 1.
  • a collecting overpressure box 2 which comprises the space in the region of the electrodes above the cover 1.
  • the furnace vault 1 there are guide rings 10 with through openings 8 for the electrodes.
  • the side wall of the box 2 is through a distribution manifold 3 with one or more openings or slits 4 facing the electrodes.
  • the collecting line 3 is connected to a pressure line 5.
  • the vault of the box 2 is formed by ceramic stones 9, which are supported on the collecting line 3. Some of these stones 9 are supported on the furnace vault 1.
  • the space between the stones 9 has the shape of a channel and forms the box 2, which is connected to channels of an intermediate or compensating ring 11, which can be made of stones similar to stones 9 with stones provided between them.
  • the manifold 3 is connected by means of joints 14 to arms 13, the second ends of which are fastened to the support ring of the furnace vault 1 by means of securing elements 15.
  • Throttle rings 12, which surround the electrodes, are loosely placed on the vault of the box 2 from the outside. If the fume cupboard according to the invention is installed in already existing furnaces, the intermediate rings 11 serve to achieve the correct height for the throttle rings
  • FIGS. 2 and 3 The deduction of FIGS. 2 and 3 has a main line 7 in the furnace vault 1.
  • the space around the electrodes individual boxes 19 are in the area of the electrodes.
  • the electrodes are guided in guide rings 10 with through openings 8 for the electrodes.
  • the side wall of each individual box 19 is formed by a distribution bus 16 with openings 17 facing the electrode.
  • the collecting lines 16 are connected to one another by the pressure line 5 and by equalizing lines 18.
  • the vault of each box 19 is formed by stones 20 supported on the manifold 16.
  • Each of these manifolds 16 is attached to an arm 13, the second end of which is attached to the support ring of the furnace vault 1 by means of securing elements 15.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The gas- and dusthood for an electric arc furnace has a main discharge line (7) provided in the arched roof (1) of the furnace and a collecting box which surrounds the space in the region of the electrodes and is formed fron an additional arched roof. In a second embodiment, the space around the electrodes is surrounded by individual boxes. In the first embodiment, the side wall of the collecting box (2) forms a distributing/collecting line (3) with openings and/or gaps (4) which face the electrodes and which are connected to a pressure line (5). In the second embodiment, the side wall of each individual box (19) forms a distributing/collecting line (16) with openings and/or gaps (17) which face the electrodes and which are connected to a pressure line (5). In operation, the collecting box (2) or the individual collecting boxes (19) are supplied with air and/or inert gas in such a quantity that the pressure in the box or boxes lies at least 5 mm H2O above the pressure of the furnace interior. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Gas- und Staubabzug eines Lichtbogenofens, mit einer im Ofengewölbe vorgesehenen Haupt-Abzugleitung, und mit einem den Raum im Bereich der Elektroden umfassenden, aus einem Zusatzgewölbe gebildeten Sammelkasten bzw. mit den Raum um die Elektroden umgebenden Einzelkästen, sowie auf ein Verfahren zum Betreiben eines solchen Abzugs.The invention relates to a gas and dust extraction of an electric arc furnace, with a main exhaust line provided in the furnace vault, and with a collecting box comprising the space in the area of the electrodes, formed from an additional vault, or with the individual boxes surrounding the space around the electrodes, and to a method of operating such a deduction.

Ein Gas- und Staubabzug der beschriebenen Art ist aus der PL-A 138 193 bekannt. Bei den bekannten Abzügen sind auf dem Ofengewölbe im Bereich der Elektroden Zusatzgewölbe abgestützt, wodurch die Spannungen im Ofengewölbe erhöht werden und die Haltbarkeit des Ofengewölbes ungünstig beeinflußt wird. Die direkte Verbindung des Sammelkastens mit einer Überdruckleitung bewirkt, daß die gelieferte Luft nicht gleichmäßig über den ganzen Kasten verteilt wird, wodurch die Wirksamkeit der Entnahme oder Absaugung von Gas und Staub ungünstig beeinflußt wird, die aus den die Elektroden umgebenden Öffnungen fließen.A gas and dust extraction of the type described is known from PL-A 138 193. In the known fume cupboards, additional vaults are supported on the furnace vault in the area of the electrodes, as a result of which the tensions in the furnace vault are increased and the durability of the furnace vault is adversely affected. The direct connection of the collecting box to an overpressure line means that the air supplied is not distributed evenly over the whole box, which adversely affects the effectiveness of the extraction or extraction of gas and dust that flow from the openings surrounding the electrodes.

Der Erfindung liegt die Aufgabe zugrunde, einen Gas- und Staubabzug eines Lichtbogenofens zu schaffen, durch den die Umgebung des Lichtbogenofens bestmöglich vor Stäuben und Gasen geschützt und die Wärmebilanz des Ofenbetriebs verbessert wird.The invention has for its object to provide a gas and dust extraction of an arc furnace, by which the environment of the arc furnace is protected as best as possible from dusts and gases and the heat balance of the furnace operation is improved.

Diese Aufgabe wird beim Gas- und Staubabzug eines Lichtbogenofens der erstgenannten Bauart dadurch gelöst, daß die Seitenwand des Sammelkastens eine Verteilungs-Sammelleitung mit den Elektroden zugewandten Öffnungen und/oder Spalten bildet, die mit einer Druckleitung verbunden sind.This task is carried out when extracting gas and dust from an arc furnace solved the first-mentioned type in that the side wall of the collecting box forms a distribution manifold with the electrodes facing openings and / or gaps, which are connected to a pressure line.

Bei einem Gas- und Staubabzug der zweitgenannten Art wird diese Aufgabe dadurch gelöst, daß die Seitenwand jedes Einzelkastens eine Verteilungs-Sammelleitung mit den Elektroden zugewandten Öffnungen und/oder Spalten bildet, die mit einer Druckleitung verbunden sind.With a gas and dust extraction of the second type, this object is achieved in that the side wall of each individual box forms a distribution manifold with the electrodes facing openings and / or gaps, which are connected to a pressure line.

Die beiden Gas- und Staubabzüge werden erfindungsgemäß so betrieben, daß dem Sammelkasten bzw. den Einzel-Sammelkästen Luft und/oder Inertgas in einer solchen Menge zugeführt wird, daß der Druck in dem bzw. den Kästen wenigstens 5 mm H₂O über dem Druck im Ofeninneren liegt.The two gas and dust extractors are operated according to the invention in such a way that air and / or inert gas is fed to the collecting box or the individual collecting boxes in such an amount that the pressure in the box or boxes is at least 5 mm H₂O above the pressure inside the furnace lies.

Bevorzugte Weiterbildungen und Ausgestaltungen der erfindungsgemäßen Gas- und Staubabzüge eines Lichtbogenofens sind Gegenstand der Patentansprüche 3 bis 9.Preferred developments and refinements of the gas and dust fume hoods of an arc furnace according to the invention are the subject of claims 3 to 9.

Der erfindungsgemäße Gas- und Staubabzug ermöglicht es, die Verschmutzung der Umgebung des Lichtbogenofens durch Gas und Staub sicher zu verhindern. Durch die Anwendung von Verteilungs-Sammelleitungen ist die Abdichtung gleichmäßiger. Gleichzeitig ist die Kühlung sowohl der Elektroden als auch des Ofengewölbes intensiver, wodurch die Haltbarkeit des Gewölbes gesteigert und der Elektrodenverbrauch im Betrieb gesenkt wird. Die Anwendung einer Gelenkverbindung der Sammelleitung mit den Armen eliminiert Spannungen durch durch Temperaturwechsel hervorgerufene unkontrollierte Kräfte. Die Drosselringe machen den Austritt von Staub und Gas im Bereich der Elektroden unmöglich. Die Verbindung des bzw. der Kästen mit der Abzugleitung über eine mit einem Ventil versehene Leitung ermöglicht es, den Druck im Kasten je nach dem Innendruck des Ofens zu regulieren.The gas and dust extraction according to the invention makes it possible to reliably prevent the environment of the arc furnace from being contaminated by gas and dust. The sealing is more even by using distribution manifolds. At the same time, the cooling of both the electrodes and the furnace vault is more intensive, which increases the durability of the vault and reduces the electrode consumption during operation. The use of an articulated connection of the manifold with the arms eliminates stresses caused by uncontrolled forces caused by temperature changes. The throttle rings prevent dust and gas from escaping in the area of the electrodes. The connection of the box or boxes with the exhaust line via one with one Valve piping allows the pressure in the box to be regulated according to the internal pressure of the furnace.

Unabhängig davon wird durch die Ausgestaltungen der Patentansprüche 3 bis 5 und 7 die Belastung des Ofengewölbes vermindert.Irrespective of this, the load on the furnace vault is reduced by the configurations of claims 3 to 5 and 7.

Im folgenden werden anhand der Zeichnung zwei Ausführungsbeispiele des erfindungsgemäßen Gas- und Staubabzuges eines Lichtbogenofens beschrieben.Two exemplary embodiments of the gas and dust extraction according to the invention of an arc furnace are described below with reference to the drawing.

Es zeigen:

Fig. 1
einen Querschnitt eines Ofengewölbes mit einer ersten Ausführungsform des Gas- und Staubabzuges,
Fig. 2
einen Querschnitt eines Ofengewölbes mit einer zweiten Ausführungsform des erfindungsgemäßen Gas- und Staubabzuges und
Fig. 3
die Draufsicht auf die Oberseite des Ofengewölbes der Fig. 2 mit der Ausführungsform des Gas- und Staubabzuges nach Fig. 2.
Show it:
Fig. 1
2 shows a cross section of an oven vault with a first embodiment of the gas and dust extraction,
Fig. 2
a cross section of a furnace vault with a second embodiment of the gas and dust extraction according to the invention and
Fig. 3
2 with the embodiment of the gas and dust extraction according to FIG. 2.

Der Abzug nach Fig. 1 weist eine im Ofengewölbe oder Ofendeckel 1 mündende Leitung 7 auf, die über eine mit einem Ventil 6 versehene Verbindungsleitung mit einem Sammel-Überdruckkasten 2 verbunden ist, der den Raum im Bereich der Elektroden über dem Deckel 1 umfaßt. Von den üblicherweise drei Elektroden ist nur eine Elektrode schematisch angedeutet.1 has a line 7 which opens into the furnace vault or furnace cover 1 and which is connected via a connecting line provided with a valve 6 to a collecting overpressure box 2 which comprises the space in the region of the electrodes above the cover 1. Of the usually three electrodes, only one is indicated schematically.

Im Ofengewölbe 1 befinden sich Führungsringe 10 mit Durchgangsöffnungen 8 für die Elektroden. Die Seitenwand des Kastens 2 ist durch eine Verteilungs-Sammelleitung 3 mit einer oder mehreren den Elektroden zugewandten Öffnungen oder Schlitzen 4 gebildet. Die Sammelleitung 3 ist mit einer Druckleitung 5 verbunden. Das Gewölbe des Kastens 2 wird von keramischen Steinen 9 gebildet, die auf der Sammelleitung 3 abgestützt sind. Dabei stützt sich ein Teil dieser Steine 9 auf dem Ofengewölbe 1 ab. Der Raum zwischen den Steinen 9 hat die Gestalt eines Kanals und bildet den Kasten 2, der mit Kanälen eines Zwischen- oder Ausgleichringes 11 verbunden ist, der aus ähnlichen Steinen wie den Steinen 9 mit zwischen diesen vorgesehenen Steinen ausgeführt werden kann. Die Sammelleitung 3 ist mittels Gelenken 14 mit Armen 13 verbunden, deren zweite Enden mittels Sicherungselementen 15 auf dem Stützring des Ofengewölbes 1 befestigt sind. Auf das Gewölbe des Kastens 2 sind von außen Drosselringe 12 locker aufgelegt, die die Elektroden umgeben. Wird der erfindungsgemäße Abzug in bereits bestehende Öfen eingebaut, dienen die Zwischenringe 11 dazu, die richtige Höhe für die Drosselringe 12 zu erreichen.In the furnace vault 1 there are guide rings 10 with through openings 8 for the electrodes. The side wall of the box 2 is through a distribution manifold 3 with one or more openings or slits 4 facing the electrodes. The collecting line 3 is connected to a pressure line 5. The vault of the box 2 is formed by ceramic stones 9, which are supported on the collecting line 3. Some of these stones 9 are supported on the furnace vault 1. The space between the stones 9 has the shape of a channel and forms the box 2, which is connected to channels of an intermediate or compensating ring 11, which can be made of stones similar to stones 9 with stones provided between them. The manifold 3 is connected by means of joints 14 to arms 13, the second ends of which are fastened to the support ring of the furnace vault 1 by means of securing elements 15. Throttle rings 12, which surround the electrodes, are loosely placed on the vault of the box 2 from the outside. If the fume cupboard according to the invention is installed in already existing furnaces, the intermediate rings 11 serve to achieve the correct height for the throttle rings 12.

Der Abzug der Figuren 2 und 3 hat eine Hauptleitung 7 im Ofengewölbe 1. Den Raum um die Elektroden umgebende Einzelkästen 19 befinden sich im Bereich der Elektroden. Die Elektroden sind in Führungsringen 10 mit Durchgangsöffnungen 8 für die Elektroden geführt. Die Seitenwand jedes Einzelkastens 19 wird von einer Verteilungs-Sammelleitung 16 mit der Elektrode zugewandten Öffnungen 17 gebildet. Die Sammelleitungen 16 sind mit der Druckleitung 5 und durch Ausgleichleitungen 18 untereinander verbunden. Das Gewölbe jedes Kastens 19 ist von auf der Sammelleitung 16 abgestützten Steinen 20 gebildet. Jede dieser Sammelleitungen 16 ist an einem Arm 13 befestigt, dessen zweites Ende mittels Sicherungselementen 15 auf dem Stützring des Ofengewölbes 1 befestigt ist.The deduction of FIGS. 2 and 3 has a main line 7 in the furnace vault 1. The space around the electrodes individual boxes 19 are in the area of the electrodes. The electrodes are guided in guide rings 10 with through openings 8 for the electrodes. The side wall of each individual box 19 is formed by a distribution bus 16 with openings 17 facing the electrode. The collecting lines 16 are connected to one another by the pressure line 5 and by equalizing lines 18. The vault of each box 19 is formed by stones 20 supported on the manifold 16. Each of these manifolds 16 is attached to an arm 13, the second end of which is attached to the support ring of the furnace vault 1 by means of securing elements 15.

Claims (10)

Gas- und Staubabzug eines Lichtbogenofens, mit einer im Ofengewölbe (1) vorgesehenen Haupt-Abzugleitung (7) und einem den Raum im Bereich der Elektroden umfassenden, aus einem Zusatzgewölbe gebildeten Sammelkasten (2), dadurch gekennzeichnet, daß die Seitenwand des Sammelkastens (2) eine Verteilungs-Sammelleitung (3) mit den Elektroden zugewandten Öffnungen und/oder Spalten (4) bildet, die mit einer Druckleitung (5) verbunden sind (Fig. 1).Gas and dust extraction from an arc furnace, with a main exhaust line (7) provided in the furnace vault (1) and a collecting box (2) comprising the space in the area of the electrodes and formed from an additional vault, characterized in that the side wall of the collecting box (2 ) forms a distribution manifold (3) with the electrodes facing openings and / or gaps (4) which are connected to a pressure line (5) (Fig. 1). Gas- und Staubabzug eines Lichtbogenofens, mit einer im Ofengewölbe (1) vorgesehenen Haupt-Abzugleitung (7) und den Raum um die Elektroden umgebenden Einzelkästen (19), dadurch gekennzeichnet, daß die Seitenwand jedes Einzelkastens (19) eine Verteilungs-Sammelleitung (16) mit den Elektroden zugewandten Öffnungen und/oder Spalten (17) bildet, die mit einer Druckleitung (5) verbunden sind (Fig. 2, 3).Gas and dust extraction from an electric arc furnace, with a main exhaust line (7) provided in the furnace vault (1) and individual boxes (19) surrounding the space around the electrodes, characterized in that the side wall of each individual box (19) has a distribution manifold (16 ) with the electrodes facing openings and / or gaps (17) which are connected to a pressure line (5) (Fig. 2, 3). Abzug nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß den Sammelkasten (2) und/oder die Einzel-Sammelkästen (19) bildende Steine (9) oder Beton wenigstens teilweise auf der Sammelleitung (3 bzw. 16) abgestützt sind.Fume cupboard according to Claim 1 or 2, characterized in that the stones (9) or concrete forming the collecting box (2) and / or the individual collecting boxes (19) are at least partially supported on the collecting line (3 or 16). Abzug nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Sammelleitung (3) bzw. die Sammelleitungen (16) mit an der Tragkonstruktion des Ofengewölbes (1) befestigten Armen (13) verbunden sind.Extractor according to claim 1 or 2, characterized in that the collecting line (3) or the collecting lines (16) are connected to arms (13) fastened to the supporting structure of the furnace vault (1). Abzug nach Anspruch 1 und 3, dadurch gekennzeichnet, daß wenigstens ein Teil der Steine (9) des Sammelkastens (2) auf dem Ofengewölbe (1) abgestützt ist.Fume cupboard according to claims 1 and 3, characterized in that at least some of the stones (9) of the collecting box (2) are supported on the furnace vault (1). Abzug nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß auf das Äußere des Sammelkastens (2) bzw. der Sammelkästen (16) die Elektroden umgebende Drosselringe (12) lose aufgelegt sind.Fume cupboard according to claim 1 or 2, characterized in that throttle rings (12) surrounding the electrodes are loosely placed on the outside of the collecting box (2) or the collecting boxes (16). Abzug nach Anspruch 4, dadurch gekennzeichnet, daß die Sammelleitung (3) bzw. die Sammelleitungen (16) über Gelenke (14) mit den Armen (13) verbunden sind.Fume cupboard according to claim 4, characterized in that the collecting line (3) or the collecting lines (16) are connected to the arms (13) via joints (14). Abzug nach Anspruch 1, dadurch gekennzeichnet, daß der Sammelkasten (2) über eine mit einem Ventil (6) versehene Leitung mit der Haupt-Abzugleitung (7) verbunden ist.Extractor according to claim 1, characterized in that the collecting box (2) is connected to the main extractor line (7) via a line provided with a valve (6). Abzug nach Anspruch 2, dadurch gekennzeichnet, daß die Sammelleitungen (16) über Ausgleichleitungen (18) miteinander verbunden sind.Fume cupboard according to claim 2, characterized in that the collecting lines (16) are connected to one another via compensating lines (18). Verfahren zum Betreiben eines Abzugs nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß dem Sammelkasten (2) bzw. den Sammelkästen (19) Luft und/oder Inertgas in einer solchen Menge zugeführt wird, daß der Druck in dem bzw. den Kästen wenigstens 5mm H₂O über dem Druck im Ofeninneren liegt.Method for operating a fume cupboard according to claim 1 or 2, characterized in that air and / or inert gas is fed to the collecting box (2) or the collecting boxes (19) in such an amount that the pressure in the box or boxes is at least 5 mm H₂O is above the pressure inside the furnace.
EP91109184A 1990-06-05 1991-06-05 Gas- and dusthood for an electric arc furnace and process for its utilisation Withdrawn EP0460632A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL285514 1990-06-05
PL90285514A PL165379B1 (en) 1990-06-05 1990-06-05 Extraction of gases and dusts of the electric arc furnace PL PL PL PL PL PL PL

Publications (1)

Publication Number Publication Date
EP0460632A1 true EP0460632A1 (en) 1991-12-11

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ID=20051422

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EP91109184A Withdrawn EP0460632A1 (en) 1990-06-05 1991-06-05 Gas- and dusthood for an electric arc furnace and process for its utilisation

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Country Link
EP (1) EP0460632A1 (en)
CS (1) CS166491A3 (en)
HU (1) HUT57890A (en)
PL (1) PL165379B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069839B (en) * 1959-11-26
US3164658A (en) * 1962-08-20 1965-01-05 Yagi Rokuro Apparatus for use in intercepting leakage of fumes and dust from electricarc furnaces
DE1205232B (en) * 1960-02-17 1965-11-18 Von Roll Ag Device for smoke evacuation from electric ovens
GB1152886A (en) * 1966-07-29 1969-05-21 Svenska Flaektfabriken Ab A device for Regulating the Exhaust of Flue Gases from Arc Melting Furnaces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069839B (en) * 1959-11-26
DE1205232B (en) * 1960-02-17 1965-11-18 Von Roll Ag Device for smoke evacuation from electric ovens
US3164658A (en) * 1962-08-20 1965-01-05 Yagi Rokuro Apparatus for use in intercepting leakage of fumes and dust from electricarc furnaces
GB1152886A (en) * 1966-07-29 1969-05-21 Svenska Flaektfabriken Ab A device for Regulating the Exhaust of Flue Gases from Arc Melting Furnaces

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Publication number Publication date
PL165379B1 (en) 1994-12-30
CS166491A3 (en) 1992-03-18
HUT57890A (en) 1991-12-30

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