EP2225520B1 - Device for extracting metals or metal compounds from a material containing the metal or the metal compound - Google Patents

Device for extracting metals or metal compounds from a material containing the metal or the metal compound Download PDF

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Publication number
EP2225520B1
EP2225520B1 EP08861906.9A EP08861906A EP2225520B1 EP 2225520 B1 EP2225520 B1 EP 2225520B1 EP 08861906 A EP08861906 A EP 08861906A EP 2225520 B1 EP2225520 B1 EP 2225520B1
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EP
European Patent Office
Prior art keywords
metal
furnace
furnace vessel
electrode
electrodes
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Not-in-force
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EP08861906.9A
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German (de)
French (fr)
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EP2225520A1 (en
Inventor
Roland König
Rolf Degel
Jürgen Kunze
Harmen Johannes Oterdoom
Andrew Warczok
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SMS Group GmbH
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SMS Group GmbH
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5229—Manufacture of steel in electric furnaces in a direct current [DC] electric arc furnace
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5241—Manufacture of steel in electric furnaces in an inductively heated furnace
    • C21C5/5247—Manufacture of steel in electric furnaces in an inductively heated furnace processing a moving metal stream while exposed to an electromagnetic field, e.g. in an electromagnetic counter current channel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5252—Manufacture of steel in electric furnaces in an electrically heated multi-chamber furnace, a combination of electric furnaces or an electric furnace arranged for associated working with a non electric furnace
    • 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
    • F27B3/085—Arc furnaces

Definitions

  • the invention relates to a device for recovering metals or metal compounds, from a material containing the metal or the metal compound according to the preamble of patent claim 1.
  • a device of this kind is from the EP 1375628 A2 known.
  • the field of application of the invention is the purification of slags from the iron and non-ferrous production and from the precious metal extraction, as well as the improvement of the metal removal in slag-based ferroalloying processes.
  • an apparatus for recovering a metal from a slag containing the metal comprising a first furnace designed as an AC electric furnace and a second furnace constructed as a DC electric furnace, wherein a melt-bonding means is provided between the first furnace and the second furnace, so that the melt after heating in the first furnace can be brought into the second furnace.
  • the object of the invention is to integrate the previously provided only in a separate downstream furnace slag cleaning by DC - field and magnetic field in the well-known industrial object SAF (Submerged Arc Furnance), also the efficiency of the classic furnace technology in only one stage and only one unit and the bundling of the competence in only one aggregate, as well as a more uncomplicated handling. This is to make it possible to dispense with the need for two units and the reduction of electrothermal losses.
  • SAF Submerged Arc Furnance
  • the furnace vessel 3 or 6 arranged in series or on a pitch circle electrodes protrude and the furnace vessel is formed round or square.
  • a transverse bulkhead separating the regions is provided between the region of the furnace vessel in which the electrodes protrude and the region in which the additional electrode projects.
  • a simplification of conventional ovens taking into account the core idea of the invention can be achieved in that, dispensing with the additional electrode, the existing electrodes can be switched to DC operation with the bottom electrode.
  • the essence of the solution according to the invention is that the basic principle of the magnetic field directed transversely to a DC current flow is integrated into the concept of a standard SAF. It achieves a consistent gradual treatment of slag depending on the metallurgical processes, the process of slag treatment is not interrupted, temperature losses are avoided, the overall system is much smaller, the electrical equipment can be bundled, the handling of the exhaust gas is easier.
  • This version includes the combination of a classic round or angular electric reduction oven (SAF), usually operated with alternating current (AC), and a DC reduction oven with anode and cathode, supplemented by a transversely to it aligned permanent or electromagnet.
  • SAF classic round or angular electric reduction oven
  • AC alternating current
  • DC DC reduction oven with anode and cathode, supplemented by a transversely to it aligned permanent or electromagnet.
  • the furnace thus combines the known electric reduction furnace and an intensive slag cleaning furnace in one unit in terms of process technology and design.
  • This per se conventional "Enforced slag cleaning furnace", which has been designated 15, usually has 3 or 6 arranged in series or on a pitch circle electrodes 1 in a round or square running furnace vessel 2.
  • the medium (slag) 14 is supplied with the energy required for reduction, melting and settling.
  • the oven is now designed in such a way that a space 16 remains in the area of the slag tap, in which at least one further electrode 4, with the function of an anode, can be arranged.
  • the furnace is designed with a bottom electrode as the cathode 5.
  • a variant of the invention provides a switchability of the classical z. B. 3-6 electrodes in conjunction with a kind of batch process.
  • the otherwise operating in the AC mode electrodes 1 would be switched to DC operation and in this case could be dispensed with the additional electrode 4.
  • the interconnection of the electrodes 1 would thus be temporarily changed to a DC operation with the bottom electrode 5. That is, either a classical reduction furnace process would be operated OR a DC furnace process was operated with 3-6 parallel connected electrodes and bottom electrode and superimposed by the magnetic field as described. In this way existing ovens could be retrofitted even easier.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Gewinnung von Metallen oder Metallverbindungen, aus einem das Metall oder die Metallverbindung enthaltenden Material gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for recovering metals or metal compounds, from a material containing the metal or the metal compound according to the preamble of patent claim 1.

Eine Vorrichtung dieser Art ist aus der EP 1375628 A2 bekannt.A device of this kind is from the EP 1375628 A2 known.

Das Anwendungsgebiet der Erfindung ist die Reinigung von Schlacken aus der Eisen- und Nichteisengewinnung sowie aus der Edelmetallgewinnung, sowie die Verbesserung des Metallausbringens bei schlackenbasierten Ferrolegierungsprozessen.The field of application of the invention is the purification of slags from the iron and non-ferrous production and from the precious metal extraction, as well as the improvement of the metal removal in slag-based ferroalloying processes.

Aus der EP 1 807 671 B1 ist eine Vorrichtung zur Gewinnung eines Metalls aus einer das Metall enthaltenden Schlacke bekannt, mit einem ersten als Wechselstrom-Elektroofen ausgebildeten Ofen und einem zweiten als Gleichstrom- Elektroofen ausgebildeten Ofen, wobei zwischen dem ersten Ofen und dem zweiten Ofen ein Verbindungsmittel für Schmelze vorgesehen ist, so dass die Schmelze nach dem Erhitzen in dem ersten Ofen in den zweiten Ofen verbracht werden kann.From the EP 1 807 671 B1 there is known an apparatus for recovering a metal from a slag containing the metal, comprising a first furnace designed as an AC electric furnace and a second furnace constructed as a DC electric furnace, wherein a melt-bonding means is provided between the first furnace and the second furnace, so that the melt after heating in the first furnace can be brought into the second furnace.

Die intensive Schlackenreinigung mittels DC - Technologie mit einer oder mehrerer Elektroden und Bodenelektrode(n) und quer gerichtetem Magnetfeld ist bereits vorgeschlagen worden. Der runde oder rechteckige Elektroreduktionsofen ist ein bewährtes Standard -Aggregat zur Reinigung von z.B. Kupferschlacken.
Nachteile:

  • Eine Anlage zur intensiven Schlackenreinigung erfordert demzufolge 2 hintereinander geschaltete Aggregate. Dies erfordert entsprechend Platz, eine entsprechende Logistik, verbindende Rinnen, eine doppelte Ausführung von Teilen wie z.B. Steuerung oder Abgäskaminen. Zwischen den beiden Aggregaten kommt es zur Abkühlung der Schlacke und somit zu thermischen Verlusten. Standardofen und nachgeschalteter Ofen könnten von unterschiedlichen Lieferanten bezogen werden.
The intensive slag cleaning by means of DC technology with one or more electrodes and bottom electrode (s) and transversely directed magnetic field has already been proposed. The round or rectangular electric reduction furnace is a proven standard aggregate for cleaning eg copper slags.
Disadvantage:
  • A system for intensive slag cleaning therefore requires two units connected in series. This requires appropriate space, a corresponding logistics, connecting gutters, a double execution of parts such as control or Abgäskaminen. Between the two aggregates, the slag cools and thus thermal losses. Standard oven and downstream oven could be sourced from different suppliers.

Aufgabe der Erfindung ist die bislang nur in einem separaten nachgeschalteten Ofen vorgesehenen Schlackenreinigung mittels DC - Feld und Magnetfeld in das bekannte industrielle Objekt SAF (Submerged Arc Furnance) zu integrieren, ferner die Effizienzsteigerung der klassischen Ofentechnologie in nur einer Stufe und nur einem Aggregat und
die Bündelung der Kompetenz in nur einem Aggregat, sowie ein unkomplizierteres Handhabung.
Damit soll der Verzicht auf die Notwendigkeit von zwei Aggregaten und die Reduzierung der elektrothermischen Verluste ermöglicht werden.The object of the invention is to integrate the previously provided only in a separate downstream furnace slag cleaning by DC - field and magnetic field in the well-known industrial object SAF (Submerged Arc Furnance), also the efficiency of the classic furnace technology in only one stage and only one unit and
the bundling of the competence in only one aggregate, as well as a more uncomplicated handling.
This is to make it possible to dispense with the need for two units and the reduction of electrothermal losses.

Gelöst wird diese Aufgabe erfindungsgemäß durch eine Vorrichtung zur Gewinnung von Metallen oder Metallverbindungen, aus einem das Metall oder die Metallverbindung enthaltenden Material, mit einem Ofengefäß, mit einem ersten Einlass für die Zuführung des Materials, einem ersten Auslass zum Abführen von Abgas, einem Elektro-Reduktionsofen Bereich, mit einer oder mehreren üblicher Weise im AC Betrieb arbeitenden,optional auf DC Betrieb umschaltbaren Elektroden zum Schmelzen und/oder Reduzieren des zugeführten Materials, die in das Ofengefäß ragen, einem im Bereich des Schlackenabstichs vorgesehenen, als Absetzzone dienenden Raum, mit einer als Kathode ausgebildeten Bodenelektrode, zwischen der und einer Elektrode oder den optional auf DC Betrieb umschaltbaren Elektroden ein DC Stromfluß erzeugbar ist, und mit einem Elektrooder Permanentmagneten, der derart am Ofengefäß platziert ist, dass der im Ofengefäß erzeugterDC Stromfluss vom einem Magnetfeld gekreuzt wird, so dass mittels der überlagerten Strom- und Magnetfelder und der daraus resultierenden Kräfte, das im Ofen befindliche Medium derart in Bewegung versetzt wird, dass sich in Kombination der Effekte eine Rührwirkung ergibt, sowie mit einem Abstich zur Entnahme von dem geschmolzenen Metall oder der Metallverbindung und einem Überlauf oder Abstich für die Schlacke, dadurch, dass die Elektrode im Bereich des als Absetzzone dienenden Raumes angeordnet ist.This object is achieved according to the invention by a device for recovering metals or metal compounds, from a material containing the metal or the metal compound, with a furnace vessel, with a first inlet for the supply of the material, a first outlet for the discharge of exhaust gas, an electric Reduction furnace region, with one or more commonly operating in AC mode, optionally switchable to DC operation electrodes for melting and / or reducing the supplied material, which protrude into the furnace vessel, provided in the slag tap, serving as a settling zone, with a formed as a cathode bottom electrode, between which and an electrode or the optionally switchable to DC operation electrodes, a DC Stromfluß is generated, and with an electric or permanent magnet, which is placed on the furnace vessel, that the DC flow generated in the furnace vessel is crossed by a magnetic field, so that by means of the superimposed current and magnetic fields and the resulting forces, the medium in the oven is set in motion such that a combination of the effects results in a stirring effect, as well as with a tap for removal of the molten metal or metal compound and an overflow or tapping for the slag, characterized in that the electrode is arranged in the region of serving as the settling zone space.

Nach einer Ausgestaltung ist vorgesehen, dass in das Ofengefäß 3 oder 6 in Reihe oder auf einem Teilkreis angeordnete Elektroden ragen und das Ofengefäß rund oder eckig ausgebildet ist.According to one embodiment it is provided that in the furnace vessel 3 or 6 arranged in series or on a pitch circle electrodes protrude and the furnace vessel is formed round or square.

Vorzugsweise ist zwischen dem Bereich des Ofengefäßes, in den die Elektroden ragen, und dem Bereich, in den die zusätzliche Elektrode ragt, ein die Bereiche trennender Querschott vorgesehen.Preferably, a transverse bulkhead separating the regions is provided between the region of the furnace vessel in which the electrodes protrude and the region in which the additional electrode projects.

Eine Vereinfachung üblicher Öfen unter Berücksichtigung der Kernidee der Erfindung lässt sich dadurch erreichen, dass unter Verzicht auf die zusätzliche Elektrode die vorhandenen Elektroden auf DC Betrieb mit der Bodenelektrode umschaltbar sind.A simplification of conventional ovens taking into account the core idea of the invention can be achieved in that, dispensing with the additional electrode, the existing electrodes can be switched to DC operation with the bottom electrode.

Der Kern der erfindungsgemäßen Lösung besteht darin, dass das Grundprinzip des quer zu einem DC - Stromfluss gerichteten Magnetfeldes in das Konzept eines Standard - SAF integriert wird. Man erzielt eine konsequente schrittweise Behandlung der Schlacke in Abhängigkeit der metallurgischen Prozesse, der Prozess der Schlackenbehandlung wird nicht unterbrochen, Temperaturverluste werden vermieden, die Gesamtanlage wird deutlich kleiner, die elektrische Ausrüstung kann gebündelt werden, das Handling des Abgases wird einfacher.The essence of the solution according to the invention is that the basic principle of the magnetic field directed transversely to a DC current flow is integrated into the concept of a standard SAF. It achieves a consistent gradual treatment of slag depending on the metallurgical processes, the process of slag treatment is not interrupted, temperature losses are avoided, the overall system is much smaller, the electrical equipment can be bundled, the handling of the exhaust gas is easier.

Hieraus ergeben sich eine Reihe von Vorteilen:

  • Der Prozess der intensiven Schlackenreinigung kann gezielt in einem Ofengefäß gesteuert werden.
  • Die Überlagerung der verschiedenen elektrischen Größen kann optimal aufeinander abgestimmt werden.
  • Es wird weniger Platz benötigt und
  • es entfällt ein Transportschritt durch den Wegfall von einem zusätzlichen Ofengefäß.
This results in a number of advantages:
  • The process of intensive slag cleaning can be specifically controlled in a furnace vessel.
  • The superimposition of the different electrical quantities can be optimally matched to one another.
  • It takes less space and
  • it eliminates a transport step by the elimination of an additional furnace vessel.

Eine Ausführung der Erfindung ist in der Figur schematisch dargestellt und soll nachfolgend beschrieben werden.An embodiment of the invention is shown schematically in the figure and will be described below.

Diese Ausführung beinhaltet die Kombination eines klassischen rund oder eckig ausgeführten Elektro - Reduktionsofens (SAF), üblich mit Wechselstrom (AC) betrieben, und einem DC- Reduktionsofen mit Anode und Kathode, ergänzt um einen quer dazu ausgerichteten Dauer- oder Elektromagneten. Der Ofen vereint somit den bekannten Elektro - Reduktionsofen und einen Intensiv - Schlackenreinigungs - Ofen prozesstechnisch und ausführungsmäßig in einem Aggregat.This version includes the combination of a classic round or angular electric reduction oven (SAF), usually operated with alternating current (AC), and a DC reduction oven with anode and cathode, supplemented by a transversely to it aligned permanent or electromagnet. The furnace thus combines the known electric reduction furnace and an intensive slag cleaning furnace in one unit in terms of process technology and design.

Dieser an sich übliche Ofen ("Enforced slag cleaning furnace"), der mit 15 bezeichnet worden ist, besitzt in der Regel 3 oder 6 in Reihe oder auf einem Teilkreis angeordnete Elektroden 1 in einem rund oder eckig ausgeführten Ofengefäß 2. Mittels dieser Elektroden, die üblicherweise im AC Betrieb arbeiten, wird dem Medium (Schlacke) 14 die zur Reduktion, zum Schmelzen und zum Absetzen erforderliche Energie zugeführt.
Der Ofen wird nun im Gegensatz zu den bekannten Öfen jedoch in der Art ausgeführt, dass im Bereich des Schlackenabstichs ein Raum 16 verbleibt, in dem mindestens eine weitere Elektrode 4, mit der Funktion einer Anode, angeordnet sein kann. Außerdem wird der Ofen mit einer Bodenelektrode als Kathode 5 ausgeführt. Von dieser / diesen zusätzlichen Elektrode(n) ausgehend wird nun eine Spannung zur Bodenelektrode angelegt, so dass ein zusätzlicher Stromfluss (DC) durch das Medium entsteht. Der Kern eines Elektro- oder Permanentmagneten 6 wird nun so am Ofengefäß platziert, dass der DC Stromfluss im rechten Winkel (oder mit ähnlicher Wirkung) vom Magnetfeld gekreuzt wird. Mittels dieser überlagerten Strom- und Magnetfelder und der daraus resultierenden Kräfte (3-Finger-Regel) wird im Ofen das Medium (die Schlacke) in Bewegung versetzt, so dass sich in Kombination der Effekte eine Rührwirkung ergibt, die die Wirkung des klassischen Ofenprozesses unterstützt, indem insbesondere das Absetzen noch in der Schlacke vorhandener kleiner Metallteilchen verbessert wird.This per se conventional "Enforced slag cleaning furnace", which has been designated 15, usually has 3 or 6 arranged in series or on a pitch circle electrodes 1 in a round or square running furnace vessel 2. By means of these electrodes, usually operating in AC mode, the medium (slag) 14 is supplied with the energy required for reduction, melting and settling.
However, in contrast to the known ovens, the oven is now designed in such a way that a space 16 remains in the area of the slag tap, in which at least one further electrode 4, with the function of an anode, can be arranged. In addition, the furnace is designed with a bottom electrode as the cathode 5. Starting from this / this additional electrode (s) now a voltage to the bottom electrode is applied, so that an additional current flow (DC) is formed by the medium. The core of an electric or permanent magnet 6 is now placed on the furnace vessel so that the DC current flow is crossed at right angles (or with similar effect) by the magnetic field. By means of these superimposed current and magnetic fields and the resulting forces (3-finger rule), the medium (the slag) is set in motion in the furnace, so that a combination of effects results in a stirring action that supports the effect of the classic furnace process in particular by the settling still present in the slag of small metal particles is improved.

Über das DC - System wird dabei in der Regel nur die Leistung zugeführt, die für die forcierten Prozesse erforderlich ist. Das Magnetfeld erzielt seine Wirkung auch bei geringen magnetischen Feldstärken < 100 Gauss. In Kombination aller 3 Energieeintragungsarten (AC, DC, Magnetfeld) lassen sich die einzelnen Anteile noch optimieren.As a rule, only the power required for the forced processes is supplied via the DC system. The magnetic field achieves its effect even at low magnetic field strengths <100 Gauss. By combining all three types of energy input (AC, DC, magnetic field), the individual components can be optimized.

Denkbar für spezielle Prozesse sind auch Varianten mit einer zusätzlichen DC -Elektrode (Anode) im Bereich des Schlackeneinlaufs.Also conceivable for special processes are variants with an additional DC electrode (anode) in the area of the slag inlet.

Während im Bereich der Anoden eine Schüttung 13 z.B. in einer Höhe gleich dem Elektrodendurchmessers und somit vergleichsweise hoch erwünscht ist, um eine Leiterplatte auf der Schlacke darzustellen (also die Anode zu vergrößern), ist diese hohe Schüttung im Bereich der üblichen Elektroden eher unerwünscht, da sie zu elektrischen Querströmen führen kann. Sollte sich zwischen diesen beiden entgegengerichteten Aspekten im Einzelfall kein Kompromiss finden lassen, so ist der Einbau eines Querschottes 7 zur Trennung der Prozessräume oberhalb des Schlackenbades ähnlich wie bei Kivcet - Öfen möglich.While in the region of the anodes a bed 13, for example, in a height equal to the electrode diameter and thus comparatively highly desirable to represent a printed circuit board on the slag (ie to increase the anode), this high bed is rather undesirable in the field of conventional electrodes to electric cross currents can lead. If no compromise can be found between these two opposing aspects in individual cases, the installation of a transverse bulkhead 7 for separating the process spaces above the slag bath is possible in a similar way to Kivcet ovens.

Eine Variante der Erfindung stellt eine Umschaltbarkeit der klassischen z. B. 3-6 Elektroden dar in Verbindung mit einer Art Batch - Prozess. In diesem Falle würden die sonst im AC Betrieb arbeitenden Elektroden 1 auf DC Betrieb umgeschaltet werden und in diesem Fall könnte auf die zusätzliche Elektrode 4 verzichtet werden. Die Verschaltung der Elektroden 1 würde somit zeitweilig auf einen DC - Betrieb mit der Bodenelektrode 5 gewechselt werden. Das heißt, es würde entweder ein klassischer Reduktionsofenprozess betrieben ODER es würde ein DC - Ofenprozess mit 3-6 parallel geschalteten Elektroden und Bodenelektrode betrieben und dieser vom Magnetfeld überlagert, wie beschrieben. Auf diese Art ließen sich bestehende Öfen noch leichter nachrüsten.A variant of the invention provides a switchability of the classical z. B. 3-6 electrodes in conjunction with a kind of batch process. In this case, the otherwise operating in the AC mode electrodes 1 would be switched to DC operation and in this case could be dispensed with the additional electrode 4. The interconnection of the electrodes 1 would thus be temporarily changed to a DC operation with the bottom electrode 5. That is, either a classical reduction furnace process would be operated OR a DC furnace process was operated with 3-6 parallel connected electrodes and bottom electrode and superimposed by the magnetic field as described. In this way existing ovens could be retrofitted even easier.

Hinsichtlich der übrigen Bezugszeichen sei bemerkt, dass in der Zeichnung mit 8 der Abstich für das Metall bzw. die Metallverbindung bezeichnet ist, das/die sich unten im Ofengefäß unter der Schlacke 14 bei 9 angesammelt hat.
Die Abgase werden durch den Kamin 10 abgeführt.
Zum Entfernen der Schlacke 14 aus dem Ofengefäß dient der Schlackenabstich 12.With respect to the remainder of the reference numerals, it should be noted that in the drawing at 8, the tap for the metal or metal compound has been accumulated at the bottom of the furnace vessel below the slag 14 at 9.
The exhaust gases are discharged through the chimney 10.
To remove the slag 14 from the furnace vessel is the Schlackenabstich 12th

Claims (3)

  1. Device for extraction of metal or metal compounds from a material containing the metal or metal compound, comprising
    a furnace vessel (2) with a first inlet for feed of the material,
    a first outlet (10) for discharge of waste gas,
    an electric reduction furnace area with one or more electrodes (1), which usually operate in alternating-current operation and are optionally switchable over to direct-current operation and which project into the furnace vessel, for melting and/or reducing the fed material,
    a space (16) provided in the region of the slag tap (12) and serving as a settling zone,
    a base electrode (5) which is constructed as a cathode and between which and an electrode (4) or the electrode (1) optionally switchable over to direct-current operation a direct-current flow can be generated,
    an electromagnet or permanent magnet (6) which is so positioned at the furnace vessel that the direct-current flow generated in the furnace vessel is crossed by the magnetic field thereof so that by means of the superimposed current and magnetic fields and the forces resulting therefrom the medium present in the furnace is set in motion in such a way that a stirring action results from the combination of the effects, and
    a tap (8) for removal of the molten metal or the metal compound and an overflow or tap (12) for the slag,
    characterised in that
    the electrode (4) is arranged in the region of the space (16) serving as a settling zone.
  2. Device according to claim 1, wherein three or six electrodes (1) arranged in a row or on a pitch circle project into the furnace vessel (3) and the furnace vessel (2) is formed to be round or polygonal.
  3. Device according to any one of the preceding claims, wherein provided between the region of the furnace vessel into which the electrodes (1) project and the space (16) serving as settling zone and into which the electrode (4) extends is a transverse bulkhead (7) separating the regions.
EP08861906.9A 2007-12-18 2008-12-17 Device for extracting metals or metal compounds from a material containing the metal or the metal compound Not-in-force EP2225520B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007061025 2007-12-18
DE102008021886 2008-05-02
DE102008058605A DE102008058605A1 (en) 2007-12-18 2008-11-19 Apparatus for recovering metals or metal compounds from a material containing the metal or metal compound
PCT/DE2008/002125 WO2009076945A1 (en) 2007-12-18 2008-12-17 Device for extracting metals or metal compounds from a material containing the metal or the metal compound

Publications (2)

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EP2225520A1 EP2225520A1 (en) 2010-09-08
EP2225520B1 true EP2225520B1 (en) 2017-07-12

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EP08862095.0A Not-in-force EP2235461B1 (en) 2007-12-18 2008-12-11 Device and method for obtaining metals or metal compounds
EP08861906.9A Not-in-force EP2225520B1 (en) 2007-12-18 2008-12-17 Device for extracting metals or metal compounds from a material containing the metal or the metal compound

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CN (2) CN101903730B (en)
BR (2) BRPI0820788B1 (en)
CL (2) CL2008003748A1 (en)
DE (1) DE102008058605A1 (en)
PE (2) PE20091616A1 (en)
RU (2) RU2455599C2 (en)
WO (2) WO2009077114A1 (en)
ZA (2) ZA201003734B (en)

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DE102011090072A1 (en) * 2011-12-29 2013-07-04 Sms Siemag Ag A method for recovering a metal from a slag containing the metal and apparatus for recovering the metal
DE102014015302A1 (en) 2014-10-13 2016-04-14 Sms Group Gmbh Apparatus and method for cleaning slags
RU2624880C2 (en) * 2015-10-12 2017-07-07 Сергей Федорович Павлов Method of processing oxidised of nickel ores
DE102016207798A1 (en) * 2015-11-19 2017-05-24 Sms Group Gmbh Settling furnace and method of its operation
CN106082342B (en) * 2016-08-16 2017-12-08 浙江海鸿工业产品设计有限公司 Molybdenum trisulfide production reaction unit
CN107218800B (en) * 2017-06-20 2019-07-19 青岛大学 A kind of direct current electric arc furnace

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Publication number Publication date
EP2225520A1 (en) 2010-09-08
BRPI0820788B1 (en) 2017-06-13
CN101903730A (en) 2010-12-01
RU2010129525A (en) 2012-01-27
RU2010129916A (en) 2012-01-27
WO2009076945A1 (en) 2009-06-25
WO2009077114A1 (en) 2009-06-25
RU2455599C2 (en) 2012-07-10
CL2008003801A1 (en) 2009-10-16
CN101903729A (en) 2010-12-01
CN101903730B (en) 2013-12-25
ZA201003734B (en) 2011-03-30
EP2235461B1 (en) 2017-05-31
BRPI0820788A2 (en) 2015-06-16
DE102008058605A1 (en) 2009-07-02
EP2235461A1 (en) 2010-10-06
BRPI0821164A2 (en) 2015-06-16
BRPI0820788A8 (en) 2016-10-11
RU2455600C2 (en) 2012-07-10
PE20091533A1 (en) 2009-10-03
ZA201004163B (en) 2011-02-23
CN101903729B (en) 2013-07-17
BRPI0821164B1 (en) 2018-01-02
CL2008003748A1 (en) 2009-05-15
PE20091616A1 (en) 2009-11-07

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