DE3629661A1 - Method for carrying out reductive pyrometallurgical processes with pellets of oxide ores, concentrates or intermediates and also metallic intermediates by means of strongly reducing gases or oxygen-containing gases for the production and refining of a molten metal - Google Patents

Method for carrying out reductive pyrometallurgical processes with pellets of oxide ores, concentrates or intermediates and also metallic intermediates by means of strongly reducing gases or oxygen-containing gases for the production and refining of a molten metal

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Publication number
DE3629661A1
DE3629661A1 DE19863629661 DE3629661A DE3629661A1 DE 3629661 A1 DE3629661 A1 DE 3629661A1 DE 19863629661 DE19863629661 DE 19863629661 DE 3629661 A DE3629661 A DE 3629661A DE 3629661 A1 DE3629661 A1 DE 3629661A1
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DE
Germany
Prior art keywords
gas
intermediates
cylindrical
reduction
air
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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
DE19863629661
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German (de)
Inventor
Ulrich Bock
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.)
MELCHER, MARIA-LUISE, 5000 KOELN, DE
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19863629661 priority Critical patent/DE3629661A1/en
Publication of DE3629661A1 publication Critical patent/DE3629661A1/en
Granted legal-status Critical Current

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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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • 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
    • C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
    • 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
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • 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
    • F27B3/22—Arrangements of air or gas supply devices
    • F27B3/225—Oxygen blowing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]

Abstract

In a furnace chamber of cylindrical shape, a strongly reducing flame is blown via a pulsed burner centrally on to the surface of the charge or bath. This flame from the combustion of pure oxygen with natural gas, propane or light oil can have a reduction potential of PO2 = 10<-12> atmospheres. This flame impinging on to the surface of the charge or bath is deflected, sweeps across the surface and induces a stirring effect in the melt. The mass flow, obtained by convection, between the surface of the charge and bath and the reduction flame leads to a reduction of the metal oxides in the melt. The gases rising on the side walls of the cylindrical furnace chamber and still containing CO and H2 are finally burned by air which tangentially enters the upper part of the cylindrical furnace chamber at high velocity. A major part of the heat thus released serves for heating the reduction flame which is relatively cold in the case of greatly sub-stoichiometric operation. This allows intensive reduction work coupled with a considerable lowering of the energy consumption.

Description

Das Verfahren besteht darin, daß in einem zylindrisch geformten Ofenraum zentral ein Lanzenbrenner eingeführt wird. Durch diese Lanzen werden Gase wie Methan oder Propan in reiner Form oder mit wenig Sauerstoff gemischt auf die Charge innerhalb des zylindrischen Ofenraumes geblasen. Gegenstand der Erfindung ist, daß diese Gase oder Sauerstoffgasmischung mit einer Geschwindigkeit von wenigstens 100 m/s aus der Düse austritt und auf die Badoberfläche noch mit einem solchen Impuls auftreffen, daß eine leichte Bewegung der Badschmelze erzeugt wird.The process is that in a cylindrically shaped furnace chamber a lance burner is introduced centrally. Through these lances Gases such as methane or propane in pure form or mixed with little oxygen blown onto the batch within the cylindrical furnace space. The object of the invention is that these gases or oxygen gas mixture emerges from the nozzle at a speed of at least 100 m / s and hit the surface of the bath with such an impulse that a slight movement of the bath melt is generated.

Der zylindrische Ofenraum ist derartig konzipiert, daß die am Auftreffpunkt umgelenkten Gase des Lanzenbrenners mit einer Geschwindigkeit von weniger als 1 m/s entlang der Wand des zylindrischen Ofenraumes aufsteigen. Die im Bereich des Freistrahls des Gases des Lanzenbrenners durch 1 oder 2 Düsen sekantial eingeblasene Luft mit mehr als 100 m/s führt zu einer schnellen Teilverbrennung der aufsteigenden Gase. Die dabei freigesetzte Wärme dient wesentlich zum Aufheizen des Freistrahles, so daß der Freistrahl des Gaslanzenbrenners einen Sauerstoffpartikeldruck von PO₂-10-12 at aufweisen kann und an der Chargenoberfläche extrem hohe Reduktionsbedingungen bei Temperaturen zwischen 1000°C-1300°C bewirkt. Neben einer hohen Schmelzleistung, einem guten Reduktionswirkungsgrad können auch Metalle mit hohen Dampfdrücken wie As, Zn, Cd und Bi aus der Charge verflüchtigt werden.The cylindrical furnace chamber is designed in such a way that the gases of the lance burner deflected at the point of impact rise at a speed of less than 1 m / s along the wall of the cylindrical furnace chamber. The air blown secantially in the area of the free jet of gas from the lance burner through 1 or 2 nozzles with more than 100 m / s leads to a rapid partial combustion of the rising gases. The heat released serves essentially to heat up the free jet, so that the free jet of the gas lance burner can have an oxygen particle pressure of PO₂-10 -12 at and causes extremely high reduction conditions at temperatures between 1000 ° C-1300 ° C on the batch surface. In addition to high melting capacity and good reduction efficiency, metals with high vapor pressures such as As, Zn, Cd and Bi can also be volatilized from the batch.

Im oberen Teil des Ofens wird durch weiteres sekantiales Zuführen von Verbrennungsluft mit hoher Geschwindigkeit die restliche Nachverbrennung, auch die der Metalldämpfe, vollzogen.In the upper part of the furnace there is a secondary supply of combustion air the remaining afterburning at high speed, too that of metal vapors.

Durch die hohe Tangentialgeschwindigkeit des Gases im oberen Teil des zylindrischen Ofenraumes von ca. 30-50 m/s ist eine längere Verweilzeit des Gases von mindestens 5 Sekunden auf einem Temperaturniveau von mindestens 1000°C gewährleistet. Die hohe Turbulenz des zirkulierenden Gasstromes schafft kinetische Voraussetzungen für intensive Verbrennungsvorgänge, so daß zusammen mit der längeren Verweilzeit auch organische Substanzen, die in der Charge enthalten sein mögen, zerstört werden.Due to the high tangential velocity of the gas in the upper part of the cylindrical furnace space of approx. 30-50 m / s is a longer dwell time of the gas for at least 5 seconds at a temperature level of at least Guaranteed 1000 ° C. The high turbulence of the circulating gas flow creates kinetic conditions for intensive combustion processes, so that together with the longer dwell time also organic substances, that may be contained in the batch are destroyed.

Die längere Verweilzeit des Gases bei hohem Temperaturniveau im zylindrischen Oberofen hat ebenfalls einen positiven Einfluß auf die Partikelbildung des durch Verbrennung entstandenen Metalloxids. Es entsteht ein größeres Korn, das aber infolge der hohen Turbulenzen durch abrasive Einwirkung eine kugelige Form annimmt. Diese Oxide neigen nicht zum Verkleben und können deshalb leicht in Filtern mit sehr dichten Geweben aufgefangen werden.The longer dwell time of the gas at a high temperature level in the cylindrical Oberofen also has a positive influence on particle formation of the metal oxide created by combustion. It arises larger grain, but due to the high turbulence caused by abrasive Action takes on a spherical shape. These oxides do not tend to stick and can therefore easily in filters with very dense fabrics  to be caught.

Ein Vorteil dieser Erfindung liegt darin, daß die Reduktionsgase Methan oder Propan auf dem Weg von der Lanzendüse zur Chargenoberfläche im wesentlichen nicht durch eine Teilverbrennung, d. h. unter Nutzung des eigenen chemischen Wärmeinhaltes wie es bei herkömmlichen Aufblasverfahren geschieht, aufgeheizt werden, sondern durch radiale und konvektive Wärmeübertragung aus dem teilweise nachverbrannten Abgas, das den Reduktionsstrahl zirkulierend umströmt. Der auf die Charge auftretende Reduktionsstrahl ruft an dieser Stelle keine Überhitzung hervor, so daß bei hoher Reduktionsgeschwindigkeit und Reduktionsgrad nur die Metalle mit hohem Dampfdruck bei Temperaturen unter 1300°C verdampft.An advantage of this invention is that the reducing gases are methane or propane on the way from the lance nozzle to the batch surface essentially not by partial combustion, d. H. using your own chemical heat content as happens with conventional inflation processes, be heated, but by radial and convective heat transfer from the partially post-burned exhaust gas, which is the reduction jet circulating around. The reduction jet occurring on the batch does not cause overheating at this point, so at high Reduction rate and degree of reduction only the metals with high Vapor pressure evaporates at temperatures below 1300 ° C.

So werden zum Beispiel in dem Bild 1 dargestellten Ofen mit einem zylindrischen Ofenraum bei einem Durchmesser von 0,5 m und einer Höhe von 0,7 m stündlich 100 kg Mischoxidpellets bestehend aus 40% Pb; 25% Sn; 4% Zn; 0,5% Cd; 0,5% Bi eingeschmolzen. Den Pellets waren 10% Feinkohle zugesetzt. Durch die Brennerlanze (1) mit den drei Düsenköpfen (9) wurden 8 kg Propan pro Stunde aufgeblasen. Über die sekantiale Nachverbrennungsdüsen erfolgte zunächst die partielle Nachverbrennung, durch die untere und dann die vollständige Nachverbrennung durch die obere Düse.For example, the kiln shown in Figure 1 with a cylindrical kiln chamber with a diameter of 0.5 m and a height of 0.7 m produces 100 kg of mixed oxide pellets per hour consisting of 40% Pb; 25% Sn; 4% Zn; 0.5% Cd; 0.5% Bi melted down. 10% fine coal was added to the pellets. 8 kg of propane were inflated per hour through the burner lance ( 1 ) with the three nozzle heads ( 9 ). The secondary post-combustion nozzles were followed by partial post-combustion, by the lower and then complete post-combustion by the upper nozzle.

Als metallurgische Ergebnisse werden folgende Werte gefunden.The following values are found as metallurgical results.

Ausbringen:
Pb u. Sn in das Metall= 99% Pb u. Sn in die Schlacke=  0,5% Pb u. Sn in den Staub=  0,5% Zn in den Staub= über 90% Cd in den Staub= über 90% Bi in den Staub= über 90%Spreading:
Pb u. Sn in the metal = 99% Pb u. Sn in the slag = 0.5% Pb u. Sn in the dust = 0.5% Zn in the dust = over 90% Cd in the dust = over 90% Bi in the dust = over 90%

Mit einer Schmelzleistung bei gleichzeitiger äußerst intensiver Reduktion von 12,2 t Oxidpellets pro m² Herdfläche und Tag liegt dieser Wert verglichen mit herkömmlichen Schmelzöfen für ein solches Vormaterial um den Faktor 10 höher. With a melting performance and at the same time an extremely intensive reduction this is 12.2 t of oxide pellets per m² of stove area and day Value compared to conventional melting furnaces for such a raw material higher by a factor of 10.  

TAV-Ofen (tangentiale aufsteigende Verbrennung)TAV furnace (tangential ascending combustion)

  • 1 wassergekühlter Lanzenbrenner mit 3 Düsenköpfen
    2 Ofenhaube aus Stahlblech
    3 gemauerter Ofen
    4 Schmelzbad
    5 Ofenmantel
    6 Luftdüsen
    7 Oberofenraum
    8 Impuls-Brennstrahl
    9 Brennerdüse     1 water-cooled lance burner with 3 nozzle heads
    2 oven hood made of sheet steel
    3 brick oven
    4 weld pool
    5 furnace jacket
    6 air vents
    7 upper furnace room
    8 pulse jet
    9 burner nozzle

Claims (8)

1. Verfahren zur Durchführung reduzierender pyrometallurgischer Prozesse mit Pellets aus oxidischen Erzen, Konzentraten oder Zwischenprodukten, sowie metallischen Zwischenprodukten mittels stark reduzierender Gase oder sauerstoffhaltiger Gase zur Erzeugung und Raffination einer Metallschmelze, dadurch gekennzeichnet, daß das Reduktionsgas durch mindestens drei Düsen auf die Oberfläche einer Charge, die sich in einem zylindrischen oxialen Ofenraum befindet, mit Geschwindigkeit größer als 100 m/s und kleiner als 300 m/s aufgeblasen wird und daß das am Auftreffpunkt umgelenkte und mit hohen Gehalten an CO und H₂ wieder aufsteigende Gas durch in den Ofenraum sekantial eingeblasene Luft noch im zylindrischen Ofenraum nachverbrannt wird.1. A method for carrying out reducing pyrometallurgical processes with pellets of oxidic ores, concentrates or intermediates, and metallic intermediates by means of strongly reducing gases or oxygen-containing gases for producing and refining a molten metal, characterized in that the reducing gas through at least three nozzles on the surface of a batch , which is located in a cylindrical oxial furnace space, is inflated at a speed greater than 100 m / s and less than 300 m / s and that the gas deflected at the point of impact and rising again with high levels of CO and H₂ gas is blown secantially into the furnace space Air is still burned in the cylindrical furnace chamber. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Zwischenraum zwischen Aufblasstrahl und zylindrischer Wand eine Geschwindigkeit des aufsteigenden Gases von weniger als 1 m/s bewirkt.2. The method according to claim 1, characterized in that the Space between the inflation jet and the cylindrical wall an ascending gas velocity of less than 1 m / s. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Nachverbrennungsluft über mehrere, mindestens aber zwei, axial angeordnete Düsen sekantial in den zylindrischen Ofenraum eingelassen wird.3. The method according to claim 1, characterized in that the Post-combustion air over several, but at least two, axially arranged nozzles secantial in the cylindrical Oven space is let in. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Nachverbrennungsluft mit mehr als 100 m/s eingeblasen wird, so daß eine hohe tangentiale Geschwindigkeit des Gas-Luftgemisches mit starker Turbulenz entsteht.4. The method according to claim 1, characterized in that the Post-combustion air is blown in at more than 100 m / s, so that a high tangential speed of the Gas-air mixture with strong turbulence is created. 5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die untersten Luftdüsen in der zylindrischen Ofenwand so angeordnet sind, daß die durch die teilweise Verbrennung des aufsteigenden Gases freiwerdende Wärme zum Aufheizen des auf die Chargenoberfläche auftretenden Reduktionsgases dient und die eigene chemische Wärme des Reduktionsgases kaum genutzt wird und Überhitzungen am Auftreffpunkt des Reduktionsgases vermieden werden.5. The method according to claim 1, characterized in that the bottom air vents in the cylindrical furnace wall like this are arranged that by the partial combustion of the rising gas released heat for heating of the reducing gas occurring on the batch surface serves and the own chemical heat of the reducing gas  is hardly used and overheating at the point of impact of the reducing gas be avoided. 6. Verfahren nach Anspruch 1 und nach Anspruch 5, dadurch gekennzeichnet, daß durch diesen Aufheizeffekt das Reduktionsgas mit einem Sauerstoff-Faktor niedriger R O, 3 aufgeblasen werden kann.6. The method according to claim 1 and according to claim 5, characterized in that due to this heating effect, the reducing gas with an oxygen factor lower R O, 3 can be inflated. 7. Verfahren nach Anspruch 1 und Anspruch 3, dadurch gekennzeichnet, daß die oberen axial angeordneten Luftdüsen außerhalb des Freistrahls des Reduktionsgases liegen und durch diese Düsen eingeblasene Luft den Nachverbrennungsvorgang vollständig noch im Ofenraum abschließt.7. The method according to claim 1 and claim 3, characterized in that the upper axially arranged air nozzles outside the free jet of the reducing gas lie and air blown through these nozzles the post-combustion process completely closes in the furnace chamber. 8. Verfahren nach Anspruch 1 und Anspruch 4, dadurch gekennzeichnet, daß durch die hohe Tangentialgeschwindigkeit des nachverbrannten Gases im oberen Teil des zylindrischen Ofenraumes eine Verweilzeit dieses Gases von mehr als fünf Sekunden gegeben ist.8. The method according to claim 1 and claim 4, characterized in that due to the high tangential velocity of the afterburned gas in the upper part of the cylindrical furnace space a residence time of this gas of more than five seconds.
DE19863629661 1986-08-30 1986-08-30 Method for carrying out reductive pyrometallurgical processes with pellets of oxide ores, concentrates or intermediates and also metallic intermediates by means of strongly reducing gases or oxygen-containing gases for the production and refining of a molten metal Granted DE3629661A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19863629661 DE3629661A1 (en) 1986-08-30 1986-08-30 Method for carrying out reductive pyrometallurgical processes with pellets of oxide ores, concentrates or intermediates and also metallic intermediates by means of strongly reducing gases or oxygen-containing gases for the production and refining of a molten metal

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19863629661 DE3629661A1 (en) 1986-08-30 1986-08-30 Method for carrying out reductive pyrometallurgical processes with pellets of oxide ores, concentrates or intermediates and also metallic intermediates by means of strongly reducing gases or oxygen-containing gases for the production and refining of a molten metal
PCT/DE1988/000097 WO1989008153A1 (en) 1988-02-25 1988-02-25 Process for implementing reducing pyrometallurgical processes with pellets
AU13666/88A AU1366688A (en) 1988-02-25 1988-02-25 Process for implementing reducing pyrometallurgical processes with pellets
CA000560115A CA1327275C (en) 1988-02-25 1988-02-29 Method for continuous reduction in pyrometallurgical processes with pellets

Publications (1)

Publication Number Publication Date
DE3629661A1 true DE3629661A1 (en) 1988-03-10

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DE19863629661 Granted DE3629661A1 (en) 1986-08-30 1986-08-30 Method for carrying out reductive pyrometallurgical processes with pellets of oxide ores, concentrates or intermediates and also metallic intermediates by means of strongly reducing gases or oxygen-containing gases for the production and refining of a molten metal

Country Status (4)

Country Link
AU (1) AU1366688A (en)
CA (1) CA1327275C (en)
DE (1) DE3629661A1 (en)
WO (1) WO1989008153A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989008153A1 (en) * 1988-02-25 1989-09-08 Bahnemann, Manfred Process for implementing reducing pyrometallurgical processes with pellets
DE3915740A1 (en) * 1989-05-13 1990-11-15 Ludger Schumacher High temp. processing unit for e.g. annealing or melting - has reactor with oven chamber having tangentially arranged feed openings in sidewalls and controllable bucket wheel discharge
NL1009412C2 (en) * 1998-06-15 1999-12-16 Gibros Pec Bv Method for pyrometallurgical processing of metal-containing waste in an oven room.

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DE2812869A1 (en) * 1977-04-06 1978-10-19 Outokumpu Oy METHOD OF SUSPENSION MELTING OF SULPHIDE CONCENTRATE
DE2645585B2 (en) * 1976-10-06 1978-12-14 Wolfgang Prof. Dr.-Ing. 1000 Berlin Wuth Process for the continuous or discontinuous treatment of molten slag containing heavy metal oxide to release valuable metals and / or their compounds
DE2922189B1 (en) * 1979-05-31 1980-10-09 Kloeckner Humboldt Deutz Ag Method and device for smelting fusible materials such as ore concentrate
DE3405462C2 (en) * 1983-02-17 1986-02-06 Outokumpu Oy, Helsinki Levitation melting process with supply of additional gas into the reaction shaft

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FR1168202A (en) * 1956-03-31 1958-12-05 Process for the manufacture of cast iron in a blast furnace by blowing air, starting from small or fine ores, without prior agglomeration, furnace for carrying out this process and nozzle used in said furnace
FR2384848A1 (en) * 1977-03-25 1978-10-20 Samancor Management Services Blast furnace construction and use - with at least one downwardly vertical tuyere through which oxygen-enriched blast is introduced
US4671765A (en) * 1986-02-19 1987-06-09 Ppg Industries, Inc. Burner design for melting glass batch and the like
DE3629661A1 (en) * 1986-08-30 1988-03-10 Ulrich Bock Method for carrying out reductive pyrometallurgical processes with pellets of oxide ores, concentrates or intermediates and also metallic intermediates by means of strongly reducing gases or oxygen-containing gases for the production and refining of a molten metal
DE3638204A1 (en) * 1986-11-08 1988-05-11 Kloeckner Humboldt Deutz Ag Process and equipment for the smelting of fusible materials such as ore concentrate, utilising unspent reducing gas from the top-blowing process in the melting cyclone

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DE2645585B2 (en) * 1976-10-06 1978-12-14 Wolfgang Prof. Dr.-Ing. 1000 Berlin Wuth Process for the continuous or discontinuous treatment of molten slag containing heavy metal oxide to release valuable metals and / or their compounds
DE2812869A1 (en) * 1977-04-06 1978-10-19 Outokumpu Oy METHOD OF SUSPENSION MELTING OF SULPHIDE CONCENTRATE
DE2922189B1 (en) * 1979-05-31 1980-10-09 Kloeckner Humboldt Deutz Ag Method and device for smelting fusible materials such as ore concentrate
DE3405462C2 (en) * 1983-02-17 1986-02-06 Outokumpu Oy, Helsinki Levitation melting process with supply of additional gas into the reaction shaft

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989008153A1 (en) * 1988-02-25 1989-09-08 Bahnemann, Manfred Process for implementing reducing pyrometallurgical processes with pellets
DE3915740A1 (en) * 1989-05-13 1990-11-15 Ludger Schumacher High temp. processing unit for e.g. annealing or melting - has reactor with oven chamber having tangentially arranged feed openings in sidewalls and controllable bucket wheel discharge
NL1009412C2 (en) * 1998-06-15 1999-12-16 Gibros Pec Bv Method for pyrometallurgical processing of metal-containing waste in an oven room.
EP0965651A2 (en) * 1998-06-15 1999-12-22 Gibros Pec B.V. Pyrometallurgical processing of metal and organics containing waste in a smelt chamber
EP0965651A3 (en) * 1998-06-15 2000-01-26 Gibros Pec B.V. Pyrometallurgical processing of metal and organics containing waste in a smelt chamber
US6159268A (en) * 1998-06-15 2000-12-12 Droan B.V. Process for pyrometallurgical processing in a furnace chamber, of metal-containing waste

Also Published As

Publication number Publication date
CA1327275C (en) 1994-03-01
AU1366688A (en) 1989-09-22
WO1989008153A1 (en) 1989-09-08

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Free format text: BOCK, ULRICH, 3040 SOLTAU, DE

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