EP0653496A1 - Process and apparatus for the recovery of valuable materials - Google Patents

Process and apparatus for the recovery of valuable materials Download PDF

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Publication number
EP0653496A1
EP0653496A1 EP94250266A EP94250266A EP0653496A1 EP 0653496 A1 EP0653496 A1 EP 0653496A1 EP 94250266 A EP94250266 A EP 94250266A EP 94250266 A EP94250266 A EP 94250266A EP 0653496 A1 EP0653496 A1 EP 0653496A1
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EP
European Patent Office
Prior art keywords
furnace
melt
reducing agent
slag
partition
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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.)
Granted
Application number
EP94250266A
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German (de)
French (fr)
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EP0653496B1 (en
Inventor
Heribert König
Heinz Stark
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Vodafone GmbH
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Mannesmann AG
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    • 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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
    • 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
    • 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
    • C21C5/56—Manufacture of steel by other methods
    • 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
    • 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
    • F27B3/20—Arrangements of heating devices
    • F27B3/205—Burners

Definitions

  • the invention relates to a process for recovering valuable materials from oxygen-bound metals by reduction in metallurgical vessels and a melting furnace system with a partition separating the vessel in two parts from the furnace ceiling and into the vessel, with a device for supplying thermal energy, material supply and melt removal devices and a connection to a gas cleaning system.
  • a system with a reactor filled with liquid metal in which a partition is arranged in the central region of the reactor, which has at least one passage opening for the liquid metal at the bottom of the reactor.
  • This system is used for the gasification of inferior fuels in a molten metal melt bath, in particular an iron melt bath, and is not suitable for reducing an oxidic, metallurgical value melt.
  • Inferior fuels including waste oil, household waste, bulky waste, waste materials, car tires and the like. ⁇ ., introduced into the molten metal.
  • the carbon contained in the inferior fuel as well as the sulfur dissolve in the iron bath.
  • the non-gasifiable or insoluble constituents of the inferior fuels are slagged and immediately withdrawn from the reactor chamber via the extraction device. There is no intimate contact between a reducing agent and the slag melt.
  • the invention has set itself the goal of specifying a method and the melting furnace installation required for the extraction of valuable materials from oxygen-bound metals, with which the output is increased with a simultaneous reduction in the reduction time.
  • the invention solves the problem with the characterizing features of method claim 1 and device claim 5.
  • a first furnace part of the metallurgical vessel is equipped with a partition wall which dips into the slag and which separates part of the furnace chamber. The oxidic melt penetrates under the partition into the separated part of the hearth and assumes the same level there.
  • the second part of the furnace is designed as a shaft and filled with coke, so high that the weight of the coke column becomes so great that the buoyancy of the oxidic bath is overcome and the coke is immersed over the entire height of the slag bath floating on the molten metal.
  • electrodes protruding obliquely into the reducing agent shaft are provided, which are provided with an electrical energy source.
  • an electrical voltage is applied to the electrodes, a current flows through the electrical resistance of the reducing agent Electrode to electrode, which generates the Joule heat required for the reduction process.
  • the gas generated during the reduction roams the coke layers of the shaft against the direction of the coke. Possibly. Carbon dioxide produced during the course of the process is reduced by the reducing agent, so that a high-quality fuel gas is obtained in total above the coke bed.
  • the gas generated in the first furnace part is passed through the partition into the reducing agent shaft.
  • this carbon dioxide is reduced to valuable gas by the reducing agent.
  • Another advantage is that the dust load of the exhaust gas from the first furnace part is deposited in the coke structure and is returned to the process. This relieves the pressure on the gas cleaning system and increases the amount of valuable gas.
  • FIG. 1 shows a side view
  • FIG. 2 shows a plan view
  • the figures show a first furnace part 11 and a second furnace part 12, which are connected to one another by a common vessel base 15.
  • the furnace part 11 is closed by a furnace roof 13, through which electrodes 51 to 53 and feed 33 are provided for the supply of solid mold.
  • a feed 32 for liquid molds which can be operated by a pan 35.
  • a partition 21 is provided between the furnace part 11 and the shaft-shaped furnace part 12.
  • This partition wall 21 has a length which allows such a large distance between the mouth 22 and the bottom of the vessel that the partition wall does not contain liquid metal during operation comes into contact.
  • An opening 23 is provided in the partition 21, through which gas can get into the furnace part 12 from the furnace part 11.
  • the part of the partition wall 21 which dips into the slag during operation is constructed from cooling elements 24 through which a coolant can be passed.
  • a tapping 17 for slag S and a tapping 16 for liquid metal M are provided in the side wall 19 of the furnace part 12. The tapping 16 is arranged at the same height as the vessel bottom 15 falling at an angle of inclination.
  • the head end of the shaft-shaped furnace part 12 is drawn in like a lid and has a feed 31 for the reducing agent R in its center.
  • the feed 31 as well as the feed 33 have locks 34 which prevent the gas from flowing out of the furnace.
  • a connection 41 to a gas cleaning device 42 is provided in the area of the head end 14 of the furnace part 12.
  • the total shaft of the furnace part 12 has a shaft height H which is significantly higher than the column height h of the reducing agent R.
  • FIG. 2 shows the position of the burners 54, 55 (not shown in FIG. 1) that protrude into the reducing agent R to above the slag level and are connected to an energy device 56 for direct current.
  • the electrodes 51 to 53 are connected to an energy device 57 for alternating current. Energy devices for other media for supplying heat are also possible for operating the furnace system.

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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)
  • Manufacture And Refinement Of Metals (AREA)
  • Processing Of Solid Wastes (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

The invention relates to a process for recovery of valuable material by reduction of oxygen-bonded metals in metallurgical vessels, and a melt furnace plant having a partition projecting into the vessel from the furnace ceiling dividing the furnace into two parts, having a device for supplying thermal (heat) energy, material feed and melt discharge apparatuses and a connection to a gas purification unit, for carrying out the process. The process is characterised according to the invention in that a solid or liquid charge in the first reaction zone is subjected to thermal energy until, in the case of a solid charge, a melt bath forms, or in the case of a liquid charge a melt bath is maintained, in which liquid slag floats on a metallic melt bath, in that the melt bath is fed to a second reaction zone in which the slag comes into intimate contact with a reducing agent, and in that thermal energy preventing solidification is additionally supplied to the melt in the reduction zone. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zur Wertstoffgewinnung sauerstoffgebundener Metalle durch Reduktion in metallurgischen Gefäßen und eine Schmelzofenanlage mit einer das Gefäß in zwei Teile trennende von der Ofendecke in das Gefäß hineinragenden Trennwand, mit einer Einrichtung zur Zuführung von Wärmeenergie, Materialzufuhr- und Schmelzabfuhrvorrichtungen sowie einen Anschluß an eine Gasreinigungsanlage.The invention relates to a process for recovering valuable materials from oxygen-bound metals by reduction in metallurgical vessels and a melting furnace system with a partition separating the vessel in two parts from the furnace ceiling and into the vessel, with a device for supplying thermal energy, material supply and melt removal devices and a connection to a gas cleaning system.

Bei metallurgischen Prozessen zur Gewinnung von sauerstoffgebundenen Wertmetallen, wie beispielsweise Blei oder Kupfer, durch Reduktion, wird das für den Reduktionsprozeß erforderliche Reduktionsmittel regelmäßig durch Schüttung auf das schmelzflüssige Bad gegeben. Als Folge des großen Unterschiedes im spezifischen Gewicht zwischen dem Reduktionsmittel, in den meisten Fällen Koks, und der metallurgischen Schmelze, die einer Schlackenschmelze gleichzusetzen ist, kann das Reduktionsmittel in Form von Koks nur als Schicht auf der Schmelze schwimmen. Dies bedingt einen nur wenig effektiven Kontakt der Reduktanten mit dem großen zu reduzierenden Volumen des metallurgischen, oxydischen Bades. Die Folgen dieses schlechten Kontaktes sind sehr lange (bis zu Tagen) Verweil- und Reduktionszeiten mit erheblichem Aufwand an Warmhalteenergie.In the case of metallurgical processes for the recovery of oxygen-bound valuable metals, such as lead or copper, by reduction, the reducing agent required for the reduction process is regularly added to the molten bath by pouring. As a result of the large difference in the specific weight between the reducing agent, in most cases coke, and the metallurgical melt, which is equivalent to a slag melt, the reducing agent in the form of coke can only float on the melt as a layer. This means that the reductants have only little effective contact with the large volume of the metallurgical, oxidic bath to be reduced. The consequences of this bad Contacts are very long (up to days) dwell and reduction times with considerable expenditure of heat energy.

Weiterhin ist aus der DE OS 25 09 061 ein Verfahren bekannt, bei dem metalloxydhaltiges Material in einem glühenden Koksbett reduziert wird, das als horizontaler Ring geformt ist und auf elektrischem Wege erwärmt wird. Bei diesem Verfahren, das im wesentlichen zur Gewinnung einer kohlenstoffhaltigen Metallschmelze aus metalloxydhaltigem Material dient, wird das erschmolzene Metall daran gehindert, eine zusammenhängende Schmelzenschicht unter dem Koksbett zu bilden.Furthermore, from DE OS 25 09 061 a method is known in which metal oxide-containing material is reduced in a glowing coke bed, which is shaped as a horizontal ring and is heated electrically. In this process, which essentially serves to obtain a carbon-containing metal melt from material containing metal oxide, the molten metal is prevented from forming a coherent layer of melt under the coke bed.

Als Nachteile dieses Verfahrens sind neben der schwierigen Steuerung der Verhinderung des Bildens einer zusammenhängenden Schmelzenschicht unter dem Koksbett der Einsatz eines Ringofens mit der Fülle seiner beweglichen und verschleißanfälligen Einzelteile.The disadvantages of this method, in addition to the difficult control of preventing the formation of a coherent melt layer under the coke bed, are the use of a ring furnace with the fullness of its movable and wear-prone individual parts.

Aus der Schrift DE 36 14 048 A1 ist eine Anlage mit einem mit flüssigem Metall gefüllten Reaktor bekannt, bei dem im mittleren Bereich des Reaktors eine Trennwand angeordnet ist, die am Boden des Reaktors wenigstens eine Durchlaßöffnung für das flüssige Metall aufweist. Diese Anlage dient der Vergasung minderwertige Brennstoffe in einem feuerflüssigen Metallschmelzbad, insbesondre einem Eisenschmelzbad, und ist zur Reduktion einer oxydischen, metallurgischen Wertschmelze nicht geeignet. Hierbei werden minderwertige Brennstoffe, u.a. Altöl, Hausmüll, Sperrmüll, Abfallstoffe, Autoreifen u. ä., in die Metallschmelze eingeführt. Der im minderwertigen Brennstoff enthaltene Kohlenstoff sowie auch der Schwefel gehen im Eisenbad in Lösung. Die nicht vergasbaren bzw. nicht löslichen Bestandteile der minderwertigen Brennstoffe werden verschlackt und sofort über das Abzugsorgan aus der Reaktorkammer abgezogen. Ein inniger Kontakt zwischen einem Reduktionsmittel und der Schlackenschmelze liegt hier nicht vor.From the document DE 36 14 048 A1 a system with a reactor filled with liquid metal is known, in which a partition is arranged in the central region of the reactor, which has at least one passage opening for the liquid metal at the bottom of the reactor. This system is used for the gasification of inferior fuels in a molten metal melt bath, in particular an iron melt bath, and is not suitable for reducing an oxidic, metallurgical value melt. Inferior fuels, including waste oil, household waste, bulky waste, waste materials, car tires and the like. Ä., introduced into the molten metal. The carbon contained in the inferior fuel as well as the sulfur dissolve in the iron bath. The non-gasifiable or insoluble constituents of the inferior fuels are slagged and immediately withdrawn from the reactor chamber via the extraction device. There is no intimate contact between a reducing agent and the slag melt.

Die Erfindung hat sich das Ziel gesetzt, ein Verfahren und die dazu erforderliche Schmelzofenanlage zur Wertstoffgewinnung sauerstoffgebundener Metalle anzugeben, mit denen die Ausbringung erhöht wird bei gleichzeitiger Verkürzung der Reduktionszeit.
Die Erfindung löst die Aufgabe mit den kennzeichnenden Merkmalen des Verfahrensanspruchs 1 und des Vorrichtungsanspruchs 5.
Erfindungsgemäß wird ein erster Ofenteil des metallurgischen Gefäßes mit einer in die Schlacke eintauchenden Trennwand ausgerüstet, die einen Teil des Herdraumes abtrennt. Die oxydische Schmelze drängt unter der Trennwand durch in abgetrennten Teil des Herdes und nimmt dort das gleiche Höhenniveau an.
Der zweite Ofenteil ist als Schacht ausgebildet und mit Koks verfüllt, und zwar so hoch, daß das Kokssäulengewicht so groß wird, daß die Auftriebkraft des oxydischen Bades überwunden wird und der Koks über die gesamte Höhe des auf der Metallschmelze aufschwimmenden Schlackebades eintaucht. Damit entsteht ein inniger effektiver Kontakt zwischen Reduktionsmittel und dem in der Schmelze befindlichen Metallwertstoffoxyden. Hierdurch wird die Reduktion eingeleitet und das ausreduzierte Metall wird sich unterhalb der Wertschlacke ansammeln.
Durch kontinuierliches Abfließenlassen des gewonnenen Metalls und diskontinuierliches Abstechen von abgereicherter oder ausreduzierter Schlacke im Erdbereich des Reduktionsmittelschachtes entsteht ein kontinuierlicher Fluß von oxydischer Wertschlacke zum Reduktionsbereich des Herdes unter dem Koks/Reduktionsschacht.
Zur Aufbringung des für den Reduktionsvorgang erforderlichen Energie werden schräg in den Reduktionsmittelschacht hineinragende Elektroden vorgesehen, die mit einer Elektroenergiequelle versehen sind. Bei Beaufschlagung der Elektroden mit einer elektrischen Spannung fließt durch den elektrischen Widerstand des Reduktionsmittels ein Strom von Elektrode zu Elektrode, der die für den Reduktionsprozeß erforderliche joul'sche Wärme erzeugt.
Das bei der Reduktion entstehende Gas durchstreift die Koksschichten des Schachtes entgegen der Förderrichtung des Koks. Evtl. beim Prozeßverlauf entstehendes Kohlendioxyd wird durch das Reduktionsmittel reduziert, so daß in Summe oberhalb der Koksschüttung ein hochwertiges Brenngas gewonnen wird.
In einer vorteilhaften Weiterbildung wird vorgesehen, das im ersten Ofenteil entstehende Gas durch die Trennwand in den Reduktionsmittelschacht zu leiten. Im Reduktionsmittelschacht wird dieses Kohlendioxyd durch das Reduktionsmittel zu Wertgas reduziert.
Ein weiterer Vorteil besteht darin, daß die Staublast des Abgases aus dem ersten Ofenteil im Koksgerüst sich niederschlägt und in den Prozeß zurückgeführt wird. Hierdurch wird das Gasreinigungssystem entlastet und die Wertgasmenge vergrößert.The invention has set itself the goal of specifying a method and the melting furnace installation required for the extraction of valuable materials from oxygen-bound metals, with which the output is increased with a simultaneous reduction in the reduction time.
The invention solves the problem with the characterizing features of method claim 1 and device claim 5.
According to the invention, a first furnace part of the metallurgical vessel is equipped with a partition wall which dips into the slag and which separates part of the furnace chamber. The oxidic melt penetrates under the partition into the separated part of the hearth and assumes the same level there.
The second part of the furnace is designed as a shaft and filled with coke, so high that the weight of the coke column becomes so great that the buoyancy of the oxidic bath is overcome and the coke is immersed over the entire height of the slag bath floating on the molten metal. This creates an intimate, effective contact between the reducing agent and the metal valuable oxides in the melt. This will initiate the reduction and the reduced metal will accumulate below the valuable paint.
By continuously draining the recovered metal and discontinuously tapping depleted or reduced slag in the earth area of the reducing agent shaft, there is a continuous flow of oxidic value slag to the reduction area of the hearth under the coke / reduction shaft.
To apply the energy required for the reduction process, electrodes protruding obliquely into the reducing agent shaft are provided, which are provided with an electrical energy source. When an electrical voltage is applied to the electrodes, a current flows through the electrical resistance of the reducing agent Electrode to electrode, which generates the Joule heat required for the reduction process.
The gas generated during the reduction roams the coke layers of the shaft against the direction of the coke. Possibly. Carbon dioxide produced during the course of the process is reduced by the reducing agent, so that a high-quality fuel gas is obtained in total above the coke bed.
In an advantageous development, it is provided that the gas generated in the first furnace part is passed through the partition into the reducing agent shaft. In the reducing agent shaft, this carbon dioxide is reduced to valuable gas by the reducing agent.
Another advantage is that the dust load of the exhaust gas from the first furnace part is deposited in the coke structure and is returned to the process. This relieves the pressure on the gas cleaning system and increases the amount of valuable gas.

Ein Beispiel der Erfindung ist in der beigefügten Zeichnung dargelegt. Hierbei zeigen die Figur 1 eine Seitenansicht, Figur 2 eine Draufsicht.An example of the invention is set out in the accompanying drawing. 1 shows a side view, FIG. 2 shows a plan view.

Die Figuren zeigen einen ersten Ofenteil 11 und einen zweiten Ofenteil 12, die durch einen gemeinsamen Gefäßboden 15 miteinander verbunden sind. Der Ofenteil 11 ist durch eine Ofendecke 13 abgeschlossen, durch die Elektroden 51 bis 53 und Zuführung 33 zur Zufuhr von festem Möller vorgesehen sind. In der Seitenwand 18 des Ofenteils 11 ist eine Zufuhr 32 für flüssigen Möller vorgesehen, der durch eine Pfanne 35 bedient werden kann.The figures show a first furnace part 11 and a second furnace part 12, which are connected to one another by a common vessel base 15. The furnace part 11 is closed by a furnace roof 13, through which electrodes 51 to 53 and feed 33 are provided for the supply of solid mold. In the side wall 18 of the furnace part 11 there is a feed 32 for liquid molds which can be operated by a pan 35.

Zwischen dem Ofenteil 11 und dem schachtförmig ausgeführten Ofenteil 12 ist eine Trennwand 21 vorgesehen. Diese Trennwand 21 besitzt eine Länge, die einen so weiten Abstand der Mündung 22 zum Gefäßboden zuläßt, daß die Trennwand während des Betriebes nicht mit Flüssigmetall in Kontakt kommt.
In der Trennwand 21 ist eine Öffnung 23 vorgesehen, durch die Gas von im Ofenteil 11 in den Ofenteil 12 gelangen kann.
Der Teil der Trennwand 21, der während des Betriebes in die Schlacke eintaucht, ist aus Kühlelementen 24 aufgebaut, durch die ein Kühlmittel führbar ist.
In der Seitenwand 19 des Ofenteils 12 sind ein Abstich 17 für Schlacke S und ein Abstich 16 für Flüssigmetall M vorgesehen. Der Abstich 16 ist auf gleicher Höhe wie der unter einem Neigungswinkel abfallenden Gefäßboden 15 angeordnet.A partition 21 is provided between the furnace part 11 and the shaft-shaped furnace part 12. This partition wall 21 has a length which allows such a large distance between the mouth 22 and the bottom of the vessel that the partition wall does not contain liquid metal during operation comes into contact.
An opening 23 is provided in the partition 21, through which gas can get into the furnace part 12 from the furnace part 11.
The part of the partition wall 21 which dips into the slag during operation is constructed from cooling elements 24 through which a coolant can be passed.
A tapping 17 for slag S and a tapping 16 for liquid metal M are provided in the side wall 19 of the furnace part 12. The tapping 16 is arranged at the same height as the vessel bottom 15 falling at an angle of inclination.

Das Kopfende des schachtförmigen Ofenteils 12 ist deckelartig eingezogen und weist in seinem Zentrum eine Zufuhr 31 für das Reduktionsmittel R auf. Die Zufuhr 31 wie auch die Zufuhr 33 besitzen Schleusen 34, die ein Ausströmen des Gases aus dem Ofen verhindern. Im Bereich des Kopfendes 14 des Ofenteils 12 ist ein Anschluß 41 an eine Gasreinigung 42 vorgesehen. Der Gesamtschacht des Ofenteils 12 besitzt eine Schachthöhe H, die deutlich höher ist als die Säulenhöhe h des Reduktionsmittels R.The head end of the shaft-shaped furnace part 12 is drawn in like a lid and has a feed 31 for the reducing agent R in its center. The feed 31 as well as the feed 33 have locks 34 which prevent the gas from flowing out of the furnace. In the area of the head end 14 of the furnace part 12, a connection 41 to a gas cleaning device 42 is provided. The total shaft of the furnace part 12 has a shaft height H which is significantly higher than the column height h of the reducing agent R.

Die Figur 2 zeigt die Lage der in das Reduktionsmittel R bis oberhalb des Schlackepegels hineinragenden Brenner 54, 55 (in Figur 1 nicht weiter dargestellt), die an eine Energieeinrichtung 56 für Gleichstrom angeschlossen sind.
Die Elektroden 51 bis 53 sind an eine Energieeinrichtung 57 für Wechselstrom angeschlossen.
Zum Betreiben der Ofenanlage sind auch Energieeinrichtungen für andere Medien zur Wärmezufuhr möglich.FIG. 2 shows the position of the burners 54, 55 (not shown in FIG. 1) that protrude into the reducing agent R to above the slag level and are connected to an energy device 56 for direct current.
The electrodes 51 to 53 are connected to an energy device 57 for alternating current.
Energy devices for other media for supplying heat are also possible for operating the furnace system.

Positionsliste:Position list:

1010th
SchmelzofenanlageMelting furnace plant
1111
Ofenteil 1Oven part 1
1212th
Ofenteil 2Oven part 2
1313
OfendeckeFurnace roof
1414
KopfendeHeadboard
1515
GefäßbodenVessel bottom
1616
Abstich für MetallschlackeRacking for metal slag
1717th
Abstich für SchlackeRacking for slag
1818th
Seitenwand 11Sidewall 11
1919th
Seitenwand 12Sidewall 12
2020th
Trennungseparation
2121
Trennwandpartition wall
2222
Mündungmuzzle
2323
Öffnungopening
2424th
KühlelementCooling element
3030th
MaterialzufuhrMaterial supply
3131
Zufuhr ReduktionsmittelReductant supply
3232
Zufuhr Möller flüssigMöller liquid feed
3333
Zufuhr Möller festMöller supply fixed
3434
MaterialschleuseMaterial lock
3535
Pfannepan
4040
GasreinigungsanlageGas cleaning system
4141
AnschlußConnection
4242
GasreinigungGas cleaning
5050
EnergiezufuhrEnergy supply
51, 52, 5351, 52, 53
Elektrodeelectrode
54, 5554, 55
Brennerburner
5656
Energieeinrichtung GleichstromEnergy device direct current
5757
Energieeinrichtung WechselstromEnergy device alternating current
HH
SchachthöheShaft height
LL
Länge TrennwandPartition length
MM
FlüssigmetallLiquid metal
SS
Schlackeslag
RR
ReduktionsmittelReducing agent
hH
SäulenhöheColumn height
αα
NeigungswinkelAngle of inclination

Claims (9)

Verfahren zur Wertstoffgewinnung durch Reduktion sauerstoffgebundener Metalle in metallurgischen Gefäßen,
dadurch gekennzeichnet,
daß eine feste oder flüssige Beschickung in einer ersten Reaktionszone soweit mit Wärmeenergie beaufschlagt wird, bis sich bei fester Beschickung ein Schmelzbad bildet oder bei flüssiger Beschickung ein Schmelzbad aufrechterhalten wird, bei dem flüssige Schlacke auf einem Metallschmelzbad schwimmt,
daß das Schmelzbad einer zweiten Reaktionszone zugeführt wird, bei der die Schlacke innig mit einem Reduktionsmittel in Kontakt kommt, und
daß der Schmelze in der Reduktionszone zusätzlich eine ein Einfrieren verhindernde Wärmeenergie zugeführt wird.Process for extracting valuable materials by reducing oxygen-bound metals in metallurgical vessels,
characterized,
that a solid or liquid feed in a first reaction zone is subjected to thermal energy until a melt pool is formed in the case of fixed feed or a melt pool is maintained in the case of liquid feed in which liquid slag floats on a metal melt bath,
that the molten bath is fed to a second reaction zone in which the slag comes into intimate contact with a reducing agent, and
that the melt in the reduction zone is additionally supplied with heat energy which prevents freezing. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß das Reduktionsmittel säulenförmig aufgehäuft ist und die Säulenhöhe so gewählt wird, daß sein Gewicht die Auftriebskraft des oxydischen Schlackebades überwindet.Method according to claim 1,
characterized,
that the reducing agent is piled up in a column and the column height is chosen so that its weight overcomes the buoyancy of the oxidized slag bath. Verfahren nach 1,
dadurch gekennzeichnet,
daß die Metallschmelze kontinuierlich und die Schlacke nach der Reduktionsarbeit diskontinuierlich abgestochen wird.Method according to 1,
characterized,
that the molten metal is tapped continuously and the slag discontinuously after the reduction work. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß das in der ersten Reaktionszone vorhandene Rauchgas durch das Reduktionsmittel geführt und anschließend zusammen mit den Stickoxyden der zweiten Reaktionszone nach Abgabe seiner fühlbaren Wärme gereinigt wird.Method according to claim 1,
characterized,
that the flue gas present in the first reaction zone is passed through the reducing agent and then together with the nitrogen oxides of the second reaction zone after its sensible emission Heat is cleaned. Schmelzofenanlage mit einer das Ofengefäß in zwei Teile trennende von der Ofendecke in das Gefäß hineinragenden Trennwand, mit einer Einrichtung zur Zuführung von Wärmeenergie, mit Materialzufuhr- und Schmelzenabfuhrvorrichtungen sowie einem Anschluß an eine Gasreinigungsanlage,
zur Durchführung des Verfahrens nach Anspruch 1,
dadurch gekennzeichnet,
daß die Trennwand (21) von der Ofendecke (13) des ersten Ofenteils (11) eine Länge (L) aufweist, bei der die Trennwandmündung (22) in die während des Schmelzbetriebes sich befindende Schlacke (S) bis nahe oberhalb des Flüssigmetallpegels (M) hineinragt,
daß die Trennwand (21) im Bereich der Ofendecke (13) eine Öffnung (23) vom ersten zum zweiten Ofenteil (11, 12) aufweist,
daß der zweite Ofenteils (12) schachtförmig ausgebildet ist mit einer Schachthöhe (H), die über die Säulenhöhe (h) des Reduktionsmittels hinausragt und dessen Kopfende (14) mit einem Anschluß (41) zur Verbindung mit der Gasreinigung (42) versehen ist, und
daß seitwärts in das zweite Ofengefäßteil (12) im Bereich oberhalb der Schmelze Brenner (54, 55) ragen, die an einer Energiezufuhreinrichtung (56) angeschlossen sind.Melting furnace system with a partition wall which separates the furnace vessel into two parts and protrudes from the furnace ceiling into the vessel, with a device for supplying thermal energy, with material supply and melt removal devices and a connection to a gas cleaning system,
to carry out the method according to claim 1,
characterized,
that the partition (21) from the furnace top (13) of the first furnace part (11) has a length (L) at which the partition opening (22) in the slag (S) during the melting operation to close above the liquid metal level (M ) protrudes
that the partition (21) has an opening (23) in the region of the furnace roof (13) from the first to the second furnace part (11, 12),
that the second furnace part (12) is shaft-shaped with a shaft height (H) which projects beyond the column height (h) of the reducing agent and whose head end (14) is provided with a connection (41) for connection to the gas cleaning system (42), and
that burners (54, 55) project laterally into the second furnace vessel part (12) in the region above the melt and are connected to an energy supply device (56). Schmelzofenanlage nach Anspruch 5,
dadurch gekennzeichnet,
daß die Trennwand (21) im Bereich der Decke (13) Öffnungen (13) in einer Größe aufweist, durch die Gas strömen kann, ohne daß Reduktionsmittel (R) in den ersten Ofenteil (11) gelangt.Melting furnace system according to claim 5,
characterized,
that the partition (21) in the area of the ceiling (13) has openings (13) of a size through which gas can flow without reducing agent (R) getting into the first furnace part (11). Schmelzofenanlage nach Anspruch 5,
dadurch gekennzeichnet,
daß der Bereich der Trennwand (21) der während des Schmelzbetriebes in die Schlacke (S) eintaucht, mit flüssigen Medien zu kühlende Elemente (24) aufweist.Melting furnace system according to claim 5,
characterized,
that the area of the partition (21) which dips into the slag (S) during the melting operation has elements (24) to be cooled with liquid media. Schmelzofenanlage nach Anspruch 5,
dadurch gekennzeichnet,
daß am Kopfende (14) oberhalb des Gasabzuges (41) des zweiten Ofengefäßes (12) eine mit einer Schleuse (34) versehene Zufuhr (31) für das Reduktionsmittel (R) vorgesehen ist.Melting furnace system according to claim 5,
characterized,
that at the head end (14) above the gas outlet (41) of the second furnace vessel (12) is provided with a lock (34) supply (31) for the reducing agent (R). Schmelzofenanlage nach Anspruch 5,
dadurch gekennzeichnet,
daß der gemeinsame Boden (15) des ersten und zweiten Ofengefäßteils (11,12) zum Abstich (16) hin unter einem Neigungswinkel α von 1o bis 7o abfällt.Melting furnace system according to claim 5,
characterized,
that the common bottom (15) of the first and second furnace vessel part (11, 12) drops towards the rack (16) at an angle of inclination α of 1 o to 7 o .
EP94250266A 1993-11-15 1994-11-01 Process and apparatus for the recovery of valuable materials Expired - Lifetime EP0653496B1 (en)

Applications Claiming Priority (2)

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DE4339226 1993-11-15
DE4339226A DE4339226A1 (en) 1993-11-15 1993-11-15 Method and device for extracting valuable materials

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EP (1) EP0653496B1 (en)
CN (1) CN1037530C (en)
BR (1) BR9404454A (en)
CA (1) CA2135830A1 (en)
DE (2) DE4339226A1 (en)
NO (1) NO304030B1 (en)
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WO1997028287A1 (en) * 1996-01-29 1997-08-07 Universite Libre De Bruxelles Method for processing a powdery material, and apparatus therefor
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Also Published As

Publication number Publication date
CN1111287A (en) 1995-11-08
NO944267D0 (en) 1994-11-09
EP0653496B1 (en) 1999-03-10
NO944267L (en) 1995-05-16
DE4339226A1 (en) 1995-05-18
NO304030B1 (en) 1998-10-12
CA2135830A1 (en) 1995-05-16
US5500870A (en) 1996-03-19
DE59407914D1 (en) 1999-04-15
ZA949068B (en) 1995-07-20
BR9404454A (en) 1995-06-20
CN1037530C (en) 1998-02-25

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