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WO2007003588A1 - Metallurgical device with magnetic levitation for ore reduction - Google Patents

Metallurgical device with magnetic levitation for ore reduction Download PDF

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Publication number
WO2007003588A1
WO2007003588A1 PCT/EP2006/063718 EP2006063718W WO2007003588A1 WO 2007003588 A1 WO2007003588 A1 WO 2007003588A1 EP 2006063718 W EP2006063718 W EP 2006063718W WO 2007003588 A1 WO2007003588 A1 WO 2007003588A1
Authority
WO
WIPO (PCT)
Prior art keywords
metallurgical
moved
metallurgical device
goods
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2006/063718
Other languages
German (de)
French (fr)
Inventor
Thomas Matschullat
Uwe STÜRMER
Robert Wagner
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2007003588A1 publication Critical patent/WO2007003588A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C22B4/08—Apparatus
    • 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
    • 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
    • Y02P10/20—Recycling

Definitions

  • the invention relates to a metallurgical device for reducing a good and a corresponding method.
  • Metal-containing ores and, if appropriate, metallurgical residuals are currently being reduced and melted via complexes and complex processes.
  • Pig iron is produced, for example, using sintering plants, coking plants and blast furnaces.
  • the reduction and melting of goods such as metal-containing ores require high operating expenses.
  • the fire resistance of the devices used, as well as the quality assurance cause extremely high costs.
  • Efficient cooling is a significant problem in both the reduction and melting processes. Ensuring the refractoriness of the devices used, in addition to the high cost, also has disadvantages in terms of purity, quality and sometimes also heat loss.
  • the object of the invention is to improve the reduction process of goods in the metallurgical industry.
  • a metallurgical device having a body for reducing a good, the body being designed such that the material is movable inside the body from at least one supply device to at least one discharge device, and at least partially with the body surrounding coil assembly, which is designed to levitate the goods and for its simultaneous heating.
  • the object is also achieved by a method for reducing a good in a metallurgical device, wherein the material passes through at least one feeding device in the body of the metallurgical device, wherein a Magnetic field generated by the coil assembly holds the material substantially on an axis of the body, wherein an eddy current field generated by the coil assembly heats the material, wherein the material is moved to the at least one discharge device.
  • the material after being introduced into the body of the metallurgical device, is levitated and held in suspension by the electromagnetic field generated by the coil assembly, the material is not in contact with the body inner wall. Therefore, it is not necessary to make the body as refractory as known devices. This requires a significant cost savings.
  • the quality of the reduced or molten material obtained from the material at the end of the reduction process also increases due to the effect according to the invention that contact of the material with the body is avoided.
  • the body of the metallurgical device is substantially cylindrical.
  • the body can be placed at an angle of inclination of 0 ° to 90 °.
  • the metallurgical device has a device for adjusting the angle of inclination of the body.
  • the coil arrangement for generating an electro-magnetic traveling field for moving the material along the axis of the preferably cylindrical body is formed.
  • the metallurgical device advantageously has a device for generating a gas mass flow for moving the material through the body.
  • the inner wall of the body is highly reflective coated.
  • the material in the body is reduced while being moved to a first application device for solids.
  • the material after which it has passed the first solids discharge device is melted.
  • the material is moved substantially along the axis of the body under the action of an electro-magnetic traveling field generated by means of the coil arrangement.
  • the material is moved under the action of a gas mass flow substantially along the axis of the body.
  • the product may be moved substantially along the axis of the body under the action of gravity.
  • the good is preheated by blast furnace gas.
  • the material is supplied in the form of pellets to the body of the metallurgical device.
  • FIG. 2 shows a schematic representation of the temperature profile in the body of the metallurgical device.
  • FIG. 1 shows the body 11 as an essential component of the metallurgical device 1 according to the invention.
  • the body 11 is made of austenitic steel, for example preferably a double wall with an annular gap 9.
  • the body 11 is substantially cylindrical in shape, for example, as a double-concentric body 11.
  • the body 11 can be cooled in the annular gap 9, for example by means of water and / or another cooling liquid.
  • the body 11 can be placed horizontally.
  • the body 11 can also be set in an angle ⁇ deviating from the horizontal by up to 90 °.
  • the metallurgical device 1 may have a device not shown in the drawing for adjusting the inclination angle ⁇ of the body 11.
  • the inclination angle ⁇ of the body 11 can preferably be adjusted between 0 ° and 90 °.
  • the essentially cylindrical body 11 has an axis A, along which the material 8 moves in the direction of movement x.
  • the material 8 passes into the body 11 via feed devices 6, 7.
  • the feed devices 6, 7 can be designed, for example, as an axial feed device 6 and / or as a radial feed device 7.
  • the raw material to be used as good 8 ie, for example, residual metallurgy materials and / or ores, consisting of metal oxides, elemental metals, gait and / or other constituents, is prepared accordingly before being introduced into the body 11.
  • the Gut 8 before being fed into the body 11, the necessary reducing agent content, e.g. Coal and other ingredients and preferably a corresponding binder added.
  • the stock 8, before being supplied to the body 11, is prepared by known forming methods, such as e.g. Pelletizing into a suitable form and e.g. prepared by drying on the taking place in the body 11 reduction and optionally on the additional melt treatment.
  • known forming methods such as e.g. Pelletizing into a suitable form and e.g. prepared by drying on the taking place in the body 11 reduction and optionally on the additional melt treatment.
  • the body 11 is at least partially surrounded by a coil arrangement 2, wherein the coil arrangement 2 comprises one or more inductive coils in a suitable arrangement.
  • the coil arrangement 2 comprises one or more inductive coils in a suitable arrangement.
  • a magnetic field is generated in the interior of the body 11, by means of which the material 8 is suspended in the body 11 so that there is no contact between the body inner wall 10 and the goods 8.
  • an eddy current field is generated which causes an increase in the temperature in the material 8 to be reduced.
  • the good 8 is due to gravity, moved in the direction x by the body 11.
  • the movement direction x is parallel to the axis A of the body 11.
  • the movement of the material 8 in the body 11 can be influenced, in particular by a braking action of the electro-magnetic field.
  • the body inner wall 10 has a highly reflective coating, by means of which heat losses are reduced.
  • the reflectance of the coating of the inner body wall 10 is greater than 90%, preferably greater than 99%.
  • the material 8 After the material 8 has been introduced into the body 11, it is levitated and suspended by the electromagnetic field generated by means of the coil assembly 2 in a substantially central position, i.e. close to the axis A of the body 11. While the material 8 moves in the body 11 near the axis A in the direction of movement x to a first discharge device 5 for solids, the interior of the body 11, the necessary energy is supplied to allow the reduction of the material 8 to take place with the embedded reducing agent.
  • the movement ie the promotion of the goods 8, for example, by a magnetic traveling field, which can be generated for example by means of the coil assembly 2.
  • the promotion of the goods 8 substantially gravity along the axis A, if the body 11 is not in a horizontal position, ie, if the angle ⁇ is different from 0 ° is.
  • the angle ⁇ is also referred to as the inclination angle ⁇ .
  • the promotion of the material 8 can also be done by a gas mass flow, preferably consisting of resulting reduction gas with other gas additives. It is possible to combine any of the above-mentioned and possibly further funding possibilities.
  • the reduced material 8 can optionally be discharged at different metallization degrees by preferably radially arranged discharge devices 4, 5.
  • the product 8 may optionally be further heated and melted in the body 11 until the phase separation between metal and gangue, i. Slag.
  • Metal and gait can be separated within the body 11 by material-related differences, such as the density difference between liquid metal and slag. It is also a common discharge of metal and slag, i. Gait, possible.
  • At the radially arranged discharge device 4 is a liquid discharge of liquid metal or liquid metal and slag to downstream, not shown aggregates of the metallurgical device 1. In principle, an at least partially fixed discharge to the discharge device 4 is possible. A discharge of slag can take place at the discharge device 3, which is preferably arranged axially.
  • blast furnace gas G can be used to preheat the material 8 or else in other preferably metallurgical processes with energy input.
  • Top gas G which in particular consists of one or more of the substances CO, CO2, N 2 , H 2 or H 2 O can escape through the feed devices 6, 7.
  • FIG. 2 schematically shows the development of the temperature T in the interior of the body 11 along the location in the direction of movement x.
  • FIG. 2 shows both the course of the mean temperature T 2 of the goods 8 and the course of the gas temperature Ti shown.
  • the illustrated curve of the gas temperature Ti preferably relates to the course of the temperature of the top gas.
  • the principle of the process occurring in the body 11, which comprises the heating of the material 8, is comparable to the process in a countercurrent heat exchanger.
  • a reduction of the material 8 takes place up to a first location Xi (see also FIG. 1).
  • a further venue x 2 see also FIG. 1
  • melting and separation of the phases of the material 8 take place.
  • the heating curve of the material 8 ie the curve which describes the course of the average temperature T 2 of the material 8, the melting temperature T M and the superheat temperature T ⁇ are indicated.
  • the invention relates to a method for reduction and for
  • a metallurgical device 1 which can be manufactured at a lower cost and which operates more reliably and with a lesser process time than is known using conventional technologies.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention concerns a method for reducing and liquefying metallic ores, and metallic residues, called product (8). The product (8) is moved through a body (11) by gravity and/or under the effect of a field of gradual electromagnetic waves, and maintained levitated under the effect of a magnetic field produced by a system of coils (2). The system of coils (2) further produces a field of eddy currents so as to provide the temperature required for reducing and/or liquefying the inside of the body (11). Since the product is levitated in the body (11), there is no contact is generated between the product and the inner wall of the body (10), and therefore it is not necessary to provide the body (11) of material with high fire-resistant capacity. The invention also concerns a metallurgical device (1) capable of being manufactured at reduced costs, proving to be more reliable, and having processing times less than the usual techniques.

Description

METALLURGISCHE VORRICHTUNG MIT MAGNETISCHER LEVITATION ZUR REDUKTION VON ERZMATERIALMETALLURGICAL DEVICE WITH MAGNETIC LEVITATION FOR REDUCING MATERIAL

Die Erfindung betrifft eine metallurgische Vorrichtung zur Reduktion eines Gutes und ein entsprechendes Verfahren.The invention relates to a metallurgical device for reducing a good and a corresponding method.

Metallhaltige Erze und gegebenenfalls Hüttenreststoffe werden gegenwärtig über Komplexe und aufwendige Verfahren reduziert und aufgeschmolzen. Roheisen wird beispielsweise unter Verwendung von Sinteranlagen, Kokereien und Hochöfen hergestellt. Die Reduktion und das Aufschmelzen von Gütern wie metallhaltigen Erzen erfordern hohe betriebliche Aufwendungen. So verursachen beispielsweise die Feuerfestigkeit der verwen- deten Vorrichtungen, sowie die Qualitätssicherung äußerst hohe Kosten. Sowohl beim Reduktions- als auch beim Schmelzvorgang stellt eine effiziente Kühlung ein bedeutendes Problem dar. Das Sicherstellen der Feuerfestigkeit bei den verwendeten Vorrichtungen bedingt neben den hohen Kosten außerdem Nachteile im Hinblick auf Reinheitsgrad, Qualität und mitunter auch Wärmeverluste.Metal-containing ores and, if appropriate, metallurgical residuals are currently being reduced and melted via complexes and complex processes. Pig iron is produced, for example, using sintering plants, coking plants and blast furnaces. The reduction and melting of goods such as metal-containing ores require high operating expenses. For example, the fire resistance of the devices used, as well as the quality assurance cause extremely high costs. Efficient cooling is a significant problem in both the reduction and melting processes. Ensuring the refractoriness of the devices used, in addition to the high cost, also has disadvantages in terms of purity, quality and sometimes also heat loss.

Aufgabe der Erfindung ist es, den Reduktionsvorgang von Gütern in der Hüttenindustrie zu verbessern.The object of the invention is to improve the reduction process of goods in the metallurgical industry.

Diese Aufgabe wird gelöst durch eine metallurgische Vorrichtung mit einem Körper zur Reduktion eines Gutes, wobei der Körper derart ausgebildet ist, dass das Gut im Inneren des Körpers von mindestens einer Zuführungsvorrichtung zu mindes- tens einer Austragsvorrichtung bewegbar ist, und mit einer den Körper zumindest teilweise umgebenden Spulenanordnung, die zum in der Schwebe halten des Gutes und zu seiner gleichzeitigen Erhitzung ausgebildet ist.This object is achieved by a metallurgical device having a body for reducing a good, the body being designed such that the material is movable inside the body from at least one supply device to at least one discharge device, and at least partially with the body surrounding coil assembly, which is designed to levitate the goods and for its simultaneous heating.

Die Aufgabe wird auch gelöst durch ein Verfahren zur Reduktion eines Gutes in einer metallurgischen Vorrichtung, wobei das Gut durch mindestens eine Zuführungsvorrichtung in den Körper der metallurgischen Vorrichtung gelangt, wobei ein mittels der Spulenanordnung erzeugtes Magnetfeld das Gut im wesentlichen auf einer Achse des Körpers hält, wobei ein mittels der Spulenanordnung erzeugtes Wirbelstromfeld das Gut erhitzt, wobei das Gut zu der mindestens eine Austragsvor- richtung bewegt wird.The object is also achieved by a method for reducing a good in a metallurgical device, wherein the material passes through at least one feeding device in the body of the metallurgical device, wherein a Magnetic field generated by the coil assembly holds the material substantially on an axis of the body, wherein an eddy current field generated by the coil assembly heats the material, wherein the material is moved to the at least one discharge device.

Dadurch, dass das Gut nach Zuführung in den Körper der metallurgischen Vorrichtung durch das mittels der Spulenanordnung erzeugte elektro-magnetische Feld in einen Schwebezustand ge- bracht und in der Schwebe gehalten wird, ist das Gut nicht mit der Körperinnenwand in Kontakt. Daher ist es nicht notwendig, den Körper derart feuerfest wie bei bekannten Vorrichtungen auszubilden. Dies bedingt eine erhebliche Kostenersparnis. Auch die Qualität des am Ende des Reduktionspro- zesses aus dem Gut gewonnenen reduzierten bzw. geschmolzenen Materials erhöht sich aufgrund des erfindungsgemäßen Effekts, dass eine Berührung des Gutes mit dem Körper vermieden wird.Because the material, after being introduced into the body of the metallurgical device, is levitated and held in suspension by the electromagnetic field generated by the coil assembly, the material is not in contact with the body inner wall. Therefore, it is not necessary to make the body as refractory as known devices. This requires a significant cost savings. The quality of the reduced or molten material obtained from the material at the end of the reduction process also increases due to the effect according to the invention that contact of the material with the body is avoided.

Mit Vorteil ist der Körper der metallurgischen Vorrichtung im Wesentlichen zylinderförmig ausgebildet.Advantageously, the body of the metallurgical device is substantially cylindrical.

In vorteilhafter Weiterbildung der erfindungsgemäßen metallurgischen Vorrichtung kann der Körper in einem Neigungswinkel von 0° bis 90° aufgestellt werden.In an advantageous embodiment of the metallurgical device according to the invention, the body can be placed at an angle of inclination of 0 ° to 90 °.

Mit Vorteil weist die metallurgische Vorrichtung eine Vorrichtung zur Verstellung des Neigungswinkels des Körpers auf.Advantageously, the metallurgical device has a device for adjusting the angle of inclination of the body.

Mit Vorteil ist die Spulenanordnung zur Erzeugung eines elek- tro-magnetischen Wanderfeldes zur Bewegung des Gutes entlang der Achse des vorzugsweise zylinderförmigen Körpers ausgebildet.Advantageously, the coil arrangement for generating an electro-magnetic traveling field for moving the material along the axis of the preferably cylindrical body is formed.

Mit Vorteil weist die metallurgische Vorrichtung eine Vor- richtung zur Erzeugung eines Gasmassenstromes zur Bewegung des Gutes durch den Körper auf. Mit Vorteil ist die Körperinnenwand hoch reflektierend beschichtet .The metallurgical device advantageously has a device for generating a gas mass flow for moving the material through the body. Advantageously, the inner wall of the body is highly reflective coated.

In vorteilhafter Weiterbildung des erfindungsgemäßen Verfah- rens wird das Gut im Körper während es zu einer ersten Auftragsvorrichtung für Feststoffe bewegt wird, reduziert.In an advantageous development of the method according to the invention, the material in the body is reduced while being moved to a first application device for solids.

Vorzugsweise wird das Gut, nach dem es die erste Austragsvor- richtung für Feststoffe passiert hat, geschmolzen.Preferably, the material after which it has passed the first solids discharge device is melted.

Mit Vorteil wird das Gut unter Einwirkung eines mittels der Spulenanordnung erzeugten elektro-magnetischen Wanderfeldes im Wesentlichen längs der Achse des Körpers bewegt.Advantageously, the material is moved substantially along the axis of the body under the action of an electro-magnetic traveling field generated by means of the coil arrangement.

Mit Vorteil wird das Gut unter Einwirkung eines Gasmassenstromes im Wesentlichen längs der Achse des Körpers bewegt.Advantageously, the material is moved under the action of a gas mass flow substantially along the axis of the body.

Es kann zweckmäßig sein, dass das Gut unter Einwirkung der Schwerkraft im Wesentlichen längs der Achse des Körpers be- wegt wird.It may be expedient for the product to be moved substantially along the axis of the body under the action of gravity.

Mit Vorteil wird das Gut durch Gichtgas vorgewärmt.Advantageously, the good is preheated by blast furnace gas.

Vorzugsweise wird das Gut in Form von Pellets dem Körper der metallurgischen Vorrichtung zugeführt.Preferably, the material is supplied in the form of pellets to the body of the metallurgical device.

Weitere Vorteile und Einzelheiten der Erfindung werden nachfolgend beispielhaft anhand der Zeichnungen beschrieben. Es zeigen :Further advantages and details of the invention are described below by way of example with reference to the drawings. Show it :

FIG 1 eine schematische Darstellung des Körpers der metallurgischen Vorrichtung,1 shows a schematic representation of the body of the metallurgical device,

FIG 2 eine schematische Darstellung des Temperaturverlaufs im Körper der metallurgischen Vorrichtung.2 shows a schematic representation of the temperature profile in the body of the metallurgical device.

FIG 1 zeigt als wesentlichen Bestandteil der erfindungsgemäßen metallurgischen Vorrichtung 1 den Körper 11. Der Körper 11 besteht beispielsweise aus austenitischem Stahl und weist vorzugsweise eine doppelte Wandung mit einem Ringspalt 9 auf. Vorzugsweise ist der Körper 11 im Wesentlichen zylinderförmig als beispielsweise doppelkonzentrischer Körper 11 ausgebildet. Der Körper 11 kann im Ringspalt 9 beispielsweise mittels Wasser und/oder einer anderen Kühlflüssigkeit gekühlt werden. Der Körper 11 kann horizontal gestellt werden. Der Körper 11 kann auch in einem von der Horizontalen bis zu 90° abweichenden Winkel α gestellt werden.FIG. 1 shows the body 11 as an essential component of the metallurgical device 1 according to the invention. The body 11 is made of austenitic steel, for example preferably a double wall with an annular gap 9. Preferably, the body 11 is substantially cylindrical in shape, for example, as a double-concentric body 11. The body 11 can be cooled in the annular gap 9, for example by means of water and / or another cooling liquid. The body 11 can be placed horizontally. The body 11 can also be set in an angle α deviating from the horizontal by up to 90 °.

Die metallurgische Vorrichtung 1 kann eine in der Zeichnung nicht näher dargestellte Vorrichtung zur Verstellung des Neigungswinkels α des Körpers 11 aufweisen. Dabei kann der Neigungswinkel α des Körpers 11 vorzugsweise zwischen 0° und 90° verstellt werden.The metallurgical device 1 may have a device not shown in the drawing for adjusting the inclination angle α of the body 11. In this case, the inclination angle α of the body 11 can preferably be adjusted between 0 ° and 90 °.

Der im Wesentlichen zylinderförmig ausgebildete Körper 11 weist eine Achse A auf, entlang derer sich das Gut 8 in Bewegungsrichtung x bewegt. Das Gut 8 gelangt über Zuführungsvorrichtungen 6, 7 in den Körper 11. Die Zuführungsvorrichtungen 6, 7 können beispielsweise als axiale Zuführungsvorrichtung 6 und/oder als radiale Zuführungsvorrichtung 7 ausgebildet sein. Der als Gut 8 einzusetzende Rohstoff, also beispielsweise Hüttenreststoffe und/oder Erze, bestehend aus Metalloxiden, elementaren Metallen, Gangart und/oder anderen Be- standteilen, wird vor Zuführung in den Körper 11 entsprechend präpariert. Dazu werden dem Gut 8 vor Zufuhr in den Körper 11 der nötige Reduktionsmittelanteil, z.B. Kohle und andere Bestandteile sowie vorzugsweise ein entsprechendes Bindemittel zugegeben. Vorzugsweise wird das Gut 8 bevor es dem Körper 11 zugeführt wird, mittels bekannter Formgebungsverfahren, wie z.B. Pelletieren in eine entsprechende Form gebracht und z.B. durch Trocknung auf die im Körper 11 erfolgende Reduktionsund gegebenenfalls auf die zusätzliche Schmelzbehandlung vorbereitet .The essentially cylindrical body 11 has an axis A, along which the material 8 moves in the direction of movement x. The material 8 passes into the body 11 via feed devices 6, 7. The feed devices 6, 7 can be designed, for example, as an axial feed device 6 and / or as a radial feed device 7. The raw material to be used as good 8, ie, for example, residual metallurgy materials and / or ores, consisting of metal oxides, elemental metals, gait and / or other constituents, is prepared accordingly before being introduced into the body 11. For this purpose, the Gut 8 before being fed into the body 11, the necessary reducing agent content, e.g. Coal and other ingredients and preferably a corresponding binder added. Preferably, the stock 8, before being supplied to the body 11, is prepared by known forming methods, such as e.g. Pelletizing into a suitable form and e.g. prepared by drying on the taking place in the body 11 reduction and optionally on the additional melt treatment.

Der Körper 11 ist zumindest teilweise von einer Spulenanordnung 2 umgeben, wobei die Spulenanordnung 2 ein oder mehrere induktive Spulen in geeigneter Anordnung aufweist. Mit Hilfe der Spulenanordnung 2 wird ein Magnetfeld im Inneren des Körpers 11 erzeugt, mit Hilfe dessen das Gut 8 derart schwebend im Körper 11 gehalten wird, dass kein Kontakt zwischen der Körperinnenwand 10 und dem Gut 8 besteht. Mit Hilfe der Spu- lenanordnung 2 wird ein Wirbelstromfeld erzeugt, welches eine Erhöhung der Temperatur im zu reduzierenden Gut 8 bewirkt. Bei geneigter Stellung des Körpers 11 wird das Gut 8 durch die Schwerkraft bedingt, in Bewegungsrichtung x durch den Körper 11 bewegt. Die Bewegungsrichtung x ist parallel zur Achse A des Körpers 11. Mit Hilfe des durch die Spulenanordnung 2 erzeugten elektromagnetischen Feld, kann regelnd, insbesondere durch eine Bremswirkung des elektro-magnetischen Felds, die Bewegung des Gutes 8 im Körper 11 beeinflusst werden.The body 11 is at least partially surrounded by a coil arrangement 2, wherein the coil arrangement 2 comprises one or more inductive coils in a suitable arrangement. With help the coil assembly 2, a magnetic field is generated in the interior of the body 11, by means of which the material 8 is suspended in the body 11 so that there is no contact between the body inner wall 10 and the goods 8. With the help of the coil arrangement 2, an eddy current field is generated which causes an increase in the temperature in the material 8 to be reduced. In an inclined position of the body 11, the good 8 is due to gravity, moved in the direction x by the body 11. The movement direction x is parallel to the axis A of the body 11. With the aid of the electromagnetic field generated by the coil assembly 2, the movement of the material 8 in the body 11 can be influenced, in particular by a braking action of the electro-magnetic field.

Mit Vorteil weist die Körperinnenwand 10 eine hoch reflektierende Beschichtung auf, mit Hilfe derer Wärmeverluste verringert werden. Mit Vorteil ist der Reflektionsgrad der Beschichtung der Körperinnenwand 10 größer 90 %, vorzugsweise größer 99 %.Advantageously, the body inner wall 10 has a highly reflective coating, by means of which heat losses are reduced. Advantageously, the reflectance of the coating of the inner body wall 10 is greater than 90%, preferably greater than 99%.

Nach Zuführung des Gutes 8 in den Körper 11 wird es durch das elektro-magnetische Feld, das mit Hilfe der Spulenanordnung 2 erzeugt wird, in weitestgehend zentraler Lage, d.h., nahe der Achse A des Körpers 11 zur Schwebe gebracht und in Schwebe gehalten. Während sich das Gut 8 im Körper 11 nahe der Achse A in Bewegungsrichtung x zu einer ersten Austragsvorrichtung 5 für Feststoffe bewegt, wird dem Inneren des Körpers 11 die notwendige Energie zugeführt, um die Reduktion des Gutes 8 mit dem eingebetteten Reduktionsmittel stattfinden zu lassen.After the material 8 has been introduced into the body 11, it is levitated and suspended by the electromagnetic field generated by means of the coil assembly 2 in a substantially central position, i.e. close to the axis A of the body 11. While the material 8 moves in the body 11 near the axis A in the direction of movement x to a first discharge device 5 for solids, the interior of the body 11, the necessary energy is supplied to allow the reduction of the material 8 to take place with the embedded reducing agent.

Die Bewegung, d.h. die Förderung des Gutes 8, kann beispielsweise durch ein magnetisches Wanderfeld erfolgen, das beispielsweise mit Hilfe der Spulenanordnung 2 erzeugt werden kann. Alternativ oder zusätzlich kann die Förderung des Gutes 8 im Wesentlichen längs der Achse A schwerkraftbedingt erfolgen, wenn sich der Körper 11 nicht in horizontaler Position befindet, d.h. also wenn der Winkel α von 0° verschieden ist. Der Winkel α wird auch als Neigungswinkel α bezeichnet. Die Förderung des Gutes 8 kann auch durch einen Gasmassenstrom, vorzugsweise bestehend aus resultierendem Reduktionsgas mit sonstigen Gaszusätzen, erfolgen. Es ist eine beliebi- ge Kombination der vorgenannten sowie gegebenenfalls weiterer Fördermöglichkeiten möglich.The movement, ie the promotion of the goods 8, for example, by a magnetic traveling field, which can be generated for example by means of the coil assembly 2. Alternatively or additionally, the promotion of the goods 8 substantially gravity along the axis A, if the body 11 is not in a horizontal position, ie, if the angle α is different from 0 ° is. The angle α is also referred to as the inclination angle α. The promotion of the material 8 can also be done by a gas mass flow, preferably consisting of resulting reduction gas with other gas additives. It is possible to combine any of the above-mentioned and possibly further funding possibilities.

Das reduzierte Gut 8 kann wahlweise bei unterschiedlichen Metallisierungsgraden durch vorzugsweise radial angeordnete Austragsvorrichtungen 4, 5 ausgetragen werden. Nach dem das Gut 8 die erste Austragsvorrichtung 5 passiert hat, kann es gegebenenfalls im Körper 11 weiter aufgeheizt und aufgeschmolzen werden, bis hin zur Phasentrennung zwischen Metall und Gangart, d.h. Schlacke. Metall und Gangart können durch stoffbedingte Unterschiede, wie beispielsweise der Dichte- Unterschied zwischen flüssigem Metall und Schlacke, innerhalb des Körpers 11 getrennt werden. Es ist auch ein gemeinsamer Austrag von Metall und Schlacke, d.h. Gangart, möglich. An der radial angeordneten Austragsvorrichtung 4 erfolgt ein flüssiger Austrag von flüssigem Metall oder von flüssigem Metall und Schlacke zu nachgeschalteten, nicht näher dargestellten Aggregaten der metallurgischen Vorrichtung 1. Grundsätzlich ist auch ein zumindest teilweise fester Austrag an der Austragsvorrichtung 4 möglich. Ein Austrag von Schlacke kann an der Austragsvorrichtung 3 erfolgen, die vorzugsweise axial angeordnet ist.The reduced material 8 can optionally be discharged at different metallization degrees by preferably radially arranged discharge devices 4, 5. After the product 8 has passed through the first discharge device 5, it may optionally be further heated and melted in the body 11 until the phase separation between metal and gangue, i. Slag. Metal and gait can be separated within the body 11 by material-related differences, such as the density difference between liquid metal and slag. It is also a common discharge of metal and slag, i. Gait, possible. At the radially arranged discharge device 4 is a liquid discharge of liquid metal or liquid metal and slag to downstream, not shown aggregates of the metallurgical device 1. In principle, an at least partially fixed discharge to the discharge device 4 is possible. A discharge of slag can take place at the discharge device 3, which is preferably arranged axially.

Bei dem im Körper 11 stattfindenden Reduktionsprozess anfallendes Gichtgas G, kann zur Vorwärmung des Gutes 8 oder aber auch bei anderen vorzugsweise metallurgischen Prozessen mit Energieeinsatz genutzt werden. Gichtgas G, welches insbesondere besteht aus einem oder mehreren der Stoffe CO, CO2, N2, H2 bzw. H2O kann durch die Zuführungsvorrichtungen 6, 7 entweichen.In the reduction process taking place in the body 11, blast furnace gas G, can be used to preheat the material 8 or else in other preferably metallurgical processes with energy input. Top gas G, which in particular consists of one or more of the substances CO, CO2, N 2 , H 2 or H 2 O can escape through the feed devices 6, 7.

FIG 2 zeigt schematisch die Entwicklung der Temperatur T im Inneren des Körpers 11 entlang des Ortes in Bewegungsrichtung x. Dabei ist in FIG 2 sowohl der Verlauf der mittleren Tempe- ratur T2 des Gutes 8 als auch der Verlauf der Gastemperatur Ti dargestellt. Der gezeigte Verlauf der Gastemperatur Ti bezieht sich vorzugsweise auf den Verlauf der Temperatur des Gichtgases. Das Prinzip des im Körper 11 ablaufenden Vor- gangs, der das Erwärmen des Gutes 8 umfasst, ist vergleichbar mit dem Vorgang in einem Gegenstrom-Wärmetauscher. Während sich das Gut 8 im Körper 11 bewegt, findet bis zu einem ersten Austragungsort Xi (siehe auch FIG 1) eine Reduktion des Gutes 8 statt. Zwischen dem ersten Austragungsort Xi und ei- nem weiteren Austragungsort x2 (vergleiche auch hierzu FIG 1) findet ein Schmelzen und ein Auftrennen der Phasen des Gutes 8 statt. Auf der Aufheizkurve des Gutes 8, also der Kurve, die den Verlauf der mittleren Temperatur T2 des Gutes 8 beschreibt, sind die Schmelztemperatur TM und die Überhitzungs- temperatur Tτ angedeutet.2 schematically shows the development of the temperature T in the interior of the body 11 along the location in the direction of movement x. FIG. 2 shows both the course of the mean temperature T 2 of the goods 8 and the course of the gas temperature Ti shown. The illustrated curve of the gas temperature Ti preferably relates to the course of the temperature of the top gas. The principle of the process occurring in the body 11, which comprises the heating of the material 8, is comparable to the process in a countercurrent heat exchanger. While the material 8 is moving in the body 11, a reduction of the material 8 takes place up to a first location Xi (see also FIG. 1). Between the first location Xi and a further venue x 2 (see also FIG. 1), melting and separation of the phases of the material 8 take place. On the heating curve of the material 8, ie the curve which describes the course of the average temperature T 2 of the material 8, the melting temperature T M and the superheat temperature T τ are indicated.

Der wesentliche der Erfindung zugrunde liegende Gedanke lässt sich wie folgt zusammenfassen:The essential idea underlying the invention can be summarized as follows:

Die Erfindung betrifft ein Verfahren zur Reduktion und zurThe invention relates to a method for reduction and for

Verflüssigung von präparierten metallhaltigen Erzen sowie metallhaltiger Reststoffe, zusammenfassend als Gut 8 bezeichnet. Das Gut 8 wird dabei durch Schwerkraft und/oder durch ein elektro-magnetisches Wanderfeld durch den Körper 11 be- wegt, wobei es durch ein durch eine Spulenanordnung 2 erzeugtes Magnetfeld in schwebender Position gehalten wird. Durch die Spulenanordnung 2 wird außerdem ein Wirbelstromfeld erzeugt, um eine für die Reduktion bzw. für die Verflüssigung notwendige Temperatur im Inneren des Körpers 11 zu erzeugen. Da das Gut 8 im Körper 11 schwebt, besteht kein Kontakt zwischen Gut 8 und der Körperinnenwand 10, weshalb es nicht erforderlich ist, dass der Körper 11 hochfeuerfestes Material aufweist. Erfindungsgemäß wird eine metallurgische Vorrichtung 1 bereitgestellt, die mit geringeren Kosten hergestellt werden kann und die zuverlässiger und mit geringerer Prozesszeit arbeitet, als bei Anwendung herkömmlicher Technologien bekannt . Liquefaction of prepared metal-containing ores and metal-containing residues, collectively referred to as Good 8. The material 8 is moved by gravity and / or by an electro-magnetic traveling field through the body 11, wherein it is held in a floating position by a magnetic field generated by a coil assembly 2. In addition, an eddy current field is generated by the coil arrangement 2, in order to generate a temperature in the interior of the body 11 necessary for the reduction or for the liquefaction. Since the material 8 floats in the body 11, there is no contact between Good 8 and the body inner wall 10, which is why it is not necessary that the body 11 has highly refractory material. According to the invention, a metallurgical device 1 is provided which can be manufactured at a lower cost and which operates more reliably and with a lesser process time than is known using conventional technologies.

Claims

Patentansprüche claims 1. Metallurgische Vorrichtung (1) mit einem Körper (11) zur Reduktion eines Gutes (8) , wobei der Körper (11) derart aus- gebildet ist, dass das Gut von mindestens einer Zuführungsvorrichtung (6, 7) zu mindestens einer Austragsvorrichtung (3, 4, 5) bewegbar ist, und mit einer den Körper (11) zumindest teilweise umgebenden Spulenanordnung (2), die zum in der Schwebe Halten des Gutes (8) und zur gleichzeitigen Erhitzung des Gutes (8) ausgebildet ist.1. Metallurgical device (1) having a body (11) for reducing a good (8), wherein the body (11) is designed such that the material is conveyed from at least one feed device (6, 7) to at least one discharge device (8). 3, 4, 5) is movable, and with a body (11) at least partially surrounding the coil assembly (2) which is designed for levitating the goods (8) and for simultaneous heating of the goods (8). 2. Metallurgische Vorrichtung (1) nach Anspruch 1, deren Körper (11) im Wesentlichen zylinderförmig ausgebildet ist.2. Metallurgical device (1) according to claim 1, whose body (11) is substantially cylindrical. 3. Metallurgische Vorrichtung (1) nach einem der vorangehenden Ansprüche, deren Körper (11) in einem Neigungswinkel (α) von 0° bis 90° aufstellbar ist.3. Metallurgical device (1) according to one of the preceding claims, whose body (11) can be set at an angle of inclination (α) of 0 ° to 90 °. 4. Metallurgische Vorrichtung (1) nach einem der vorangehen- den Ansprüche mit einer Vorrichtung zur Verstellung des Neigungswinkel (α) des Körpers (11) .4. Metallurgical device (1) according to one of the preceding claims with a device for adjusting the inclination angle (α) of the body (11). 5. Metallurgische Vorrichtung (1) nach einem der vorangehenden Ansprüche, wobei die Spulenanordnung (2) zur Erzeugung eines elektro-magnetischen Wanderfeldes zur Bewegung des Gutes (8) durch den Körper (11) ausgebildet ist.5. A metallurgical device (1) according to any one of the preceding claims, wherein the coil assembly (2) for generating an electro-magnetic traveling field for moving the goods (8) through the body (11) is formed. 6. Metallurgische Vorrichtung (1) nach einem der vorangehenden Ansprüche mit einer Vorrichtung zur Erzeugung eines Gas- massenstroms zur Bewegung des Gutes (8) durch den Körper (H) •6. Metallurgical device (1) according to one of the preceding claims with a device for generating a gas mass flow for moving the goods (8) through the body (H) • 7. Metallurgische Vorrichtung (1) nach einem der vorangehenden Ansprüche, wobei der Körper (11) eine Körperinnenwand (10) aufweist, die hoch reflektierend beschichtet ist. A metallurgical device (1) according to any one of the preceding claims, wherein the body (11) has a body inner wall (10) coated in a highly reflective manner. 8. Verfahren zur Reduktion eines Gutes (8) in einer metallurgischen Vorrichtung (1) nach einem der vorangehenden Ansprüche, wobei das Gut (8) durch mindestens eine Zuführungsvorrichtung (6,1), in den Körper (11) gelangt, wobei ein mittels der Spulenanordnung (2) erzeugtes Magnetfeld das Gut (8) im wesentlichen auf einer Achse (A) des Körpers (11) hält, wobei ein mittels der Spulenanordnung (2) erzeugtes Wirbelstromfeld das Gut (8) erhitzt, wobei das Gut (8) zu mindestens einer Austragsvorrichtung (3, 4, 5) bewegt wird.8. A method for reducing a good (8) in a metallurgical device (1) according to one of the preceding claims, wherein the material (8) by at least one feeding device (6,1), in the body (11) passes, wherein means magnetic field generated by the coil arrangement (2) keeps the material (8) substantially on an axis (A) of the body (11), whereby an eddy current field generated by means of the coil arrangement (2) heats the material (8), the product (8) to at least one discharge device (3, 4, 5) is moved. 9. Verfahren nach Anspruch 8, wobei das Gut (8), während es zu einer ersten Austragsvorrichtung (5) für Feststoffe bewegt wird, reduziert wird.A method according to claim 8, wherein the material (8) is reduced while being moved to a first solids discharger (5). 10. Verfahren nach Anspruch 9, wobei das Gut (8), nachdem es die erste Austragsvorrichtung (5) für Feststoffe passiert hat, geschmolzen wird.A method according to claim 9, wherein the material (8) is melted after passing through the first solids discharge device (5). 11. Verfahren nach einem der Ansprüche 8 bis 10, dadurch ge- kennzeichnet, dass das Gut (8) unter Einwirkung eines mittels der Spulenanordnung (2) erzeugten elektro-magnetischen Wanderfeldes im Wesentlichen längs der Achse (A) des Körpers (11) bewegt wird.11. The method according to any one of claims 8 to 10, character- ized in that the material (8) under the action of a means of the coil assembly (2) generated electro-magnetic traveling field substantially along the axis (A) of the body (11) moves becomes. 12. Verfahren nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, dass das Gut (8) unter Einwirkung eines Gasmassenstromes im Wesentlichen längs der Achse (A) des Körpers (11) bewegt wird.12. The method according to any one of claims 8 to 11, characterized in that the material (8) under the action of a gas mass flow substantially along the axis (A) of the body (11) is moved. 13. Verfahren nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, dass das Gut (8) unter Einwirkung der Schwerkraft im Wesentlichen längs der Achse (A) des Körpers (11) bewegt wird.13. The method according to any one of claims 8 to 12, characterized in that the material (8) under the action of gravity substantially along the axis (A) of the body (11) is moved. 14. Verfahren nach einem der Ansprüche 8 bis 13, dadurch gekennzeichnet, dass das Gut (8) durch Gichtgas (G) vorgewärmt wird. 14. The method according to any one of claims 8 to 13, characterized in that the material (8) is preheated by blast furnace gas (G). 15. Verfahren nach einem der Ansprüche 8 bis 14, dadurch gekennzeichnet, dass das Gut (8) in Form von Pellets zugeführt wird. 15. The method according to any one of claims 8 to 14, characterized in that the material (8) is supplied in the form of pellets.
PCT/EP2006/063718 2005-07-04 2006-06-30 Metallurgical device with magnetic levitation for ore reduction Ceased WO2007003588A1 (en)

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