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WO2002036834A2 - Procede et dispositif de reutilisation de residus contenant du fer ou des metaux lourds avec addition eventuelle de minerai de fer - Google Patents

Procede et dispositif de reutilisation de residus contenant du fer ou des metaux lourds avec addition eventuelle de minerai de fer Download PDF

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Publication number
WO2002036834A2
WO2002036834A2 PCT/AT2001/000344 AT0100344W WO0236834A2 WO 2002036834 A2 WO2002036834 A2 WO 2002036834A2 AT 0100344 W AT0100344 W AT 0100344W WO 0236834 A2 WO0236834 A2 WO 0236834A2
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
melt
iron
gases
metallurgical vessel
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/AT2001/000344
Other languages
German (de)
English (en)
Other versions
WO2002036834A8 (fr
WO2002036834A3 (fr
Inventor
Alexander Fleischanderl
Christof Lanzerstorfer
Fried Sauert
Hermann Pirker
Yuyou Zhai
Josef Pesl
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
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 Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of WO2002036834A2 publication Critical patent/WO2002036834A2/fr
Publication of WO2002036834A3 publication Critical patent/WO2002036834A3/fr
Publication of WO2002036834A8 publication Critical patent/WO2002036834A8/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/02—Working-up flue dust
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/66—Heat exchange
    • 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 method for recycling iron and heavy metal-containing residues, optionally with the addition of iron ore, the residues together with reducing agents such as coal and / or coke and / or carbon-containing and / or hydrocarbon-containing residues and / or hydrocarbons in solid and / or liquid and / or gaseous form, as well as oxygen and / or oxygen-enriched air are introduced into a melting cyclone, swirled and ignited, the residues are melted, volatile heavy metals are reduced and evaporated, iron oxides are reduced, the gases and the melt from the melting cyclone together are transferred into a directly coupled separating vessel in which the melt and gases are separated, the evaporated heavy metals are separated from the gases outside the separating vessel and the melt is transferred to a metallurgical vessel separated from the separating vessel rt is, as well as a plant for performing the method.
  • reducing agents such as coal and / or coke and / or carbon-containing and / or hydrocarbon-containing residues and /
  • a major problem of the iron and steel producing industry lies in the large quantities of iron and heavy metal-containing residues, such as furnace dust, sludge, mill scale and the like, which are only accessible for recycling with great effort and are therefore usually landfilled without being dumped to take advantage of their valuable content.
  • EP-A-0 735 146 A device for reducing and smelting iron ore is described in EP-A-0 735 146.
  • iron ore is reduced and melted in a melting cyclone and enters a metallurgical vessel immediately below the melting cyclone, in which the final reduction takes place with the formation of a process gas from coal and oxygen blown onto the slag / metal layer and the complete melting of the iron takes place.
  • the reducing process gas is partially burned with oxygen and in this way provides the heat necessary for the melt and the reduction both in the melting vessel and in the melting cyclone.
  • the exhaust gases are drawn off at the top opening of the melting cyclone.
  • a process for the recovery of iron and heavy metals such as zinc and lead from residues of the steel industry is described in AT 407 878 B.
  • the heavy metal-containing gas, the partially reduced iron and the slag are transferred to a furnace which is directly coupled to the melting cyclone and into which reducing agent and oxygen are blown in to reduce the iron.
  • the energy required for the reduction is fed into the furnace via a direct arc.
  • the heavy metal-containing gas is burned outside the furnace and the heavy metal oxides that form are separated off.
  • the quality of the heavy metal product produced also suffers from the direct coupling of the melting cyclone to the furnace in which the reduction to iron takes place, since the reduction releases larger amounts of dust, which are precipitated from the melting cyclone together with the heavy metals of the heavy metal-containing gas.
  • the process control is made considerably more difficult by coordinating the reactions taking place simultaneously in the melting cyclone, in the furnace and in its flue pipe.
  • the invention has as its object to further develop the method known from the Austrian application A 865/99 and the known system in such a way that residues containing iron and heavy metals, if appropriate with the addition of iron ore, are 100% converted into usable products of constant high quality and No further waste arises, and in contrast to the known method, simple process control and reliable operation of the system should be possible.
  • an exact setting of the analysis and the temperature of the iron melt as well as the generation of a slag with an iron content of less than 2%, which can be used in cement production should be made possible become.
  • the quality of the heavy metal product produced is to be improved. Compared to competing processes, this should result in savings in operating costs.
  • This object is achieved in that on the one hand reducing agents are fed into the metallurgical vessel, the iron oxides of the melt are reduced to iron to form a low-iron slag and on the other hand electrical energy is introduced to at least partially cover the heat losses and the reduction energy.
  • the separating vessel only separates the melt and gases, but does not yet treat the products obtained in the cyclone, the subsequent process steps, namely the reduction of iron, the separation of heavy metals from the gases and the adjustment of iron and slag quality, become complete independently of each other and can therefore be carried out in an optimal manner regardless of each other. This leads to a better quality of the molten iron, the slag and the heavy metal product and results in a significantly simpler process control and monitoring.
  • the evaporated heavy metals are preferably separated from the other gases by post-burning the gases immediately after exiting the separation vessel by means of air or oxygen-enriched air, and in this process converting the heavy metals into a solid oxidic form and then separating them from the gases.
  • the separating device is preferably designed as a bag filter unit.
  • the separated metal oxide for example ZnO, can be used as a starting product for zinc production.
  • the gases are advantageously cooled in a heat exchanger after the afterburning with the generation of steam.
  • the gases are quenched directly at the outlet from the separation vessel by means of water, the heavy metals are condensed and separated by means of a wet dust separation process, such as, for example, venturi scrubbers or wet electrostatic precipitators.
  • a wet dust separation process such as, for example, venturi scrubbers or wet electrostatic precipitators.
  • the heavy metals oxidize to oxides, which are then separated off.
  • the cleaned gases among which there are flammable gases such as carbon monoxide and hydrogen, are then used, for example, for combustion to generate energy.
  • coke and / or coal and / or carbon-containing and / or hydrocarbon-containing residues are introduced into the metallurgical vessel, preferably blown in, as carbon-containing reducing agents.
  • the metallurgical vessel is equipped with at least one lance and / or nozzle for blowing in reducing agent.
  • a stronger reducing agent for example ferrosilicon or aluminum, is introduced into the metallurgical vessel for further reduction. This is generally used after the reduction with carbon-containing reducing agents.
  • a part of the iron oxides to be reduced is preferably reduced by means of carbon monoxide formed during the reduction of iron oxide with a carbon-containing reducing agent.
  • the energy required to reduce and cover the heat losses is largely brought in by the electrical energy. This is particularly advantageous since chemical energy introduced in the form of carbon or hydrocarbon can only be partially used because, because of the iron reduction required, combustion is only possible up to a certain CO / CO 2 ratio.
  • the electrical energy is preferably introduced via graphite electrodes.
  • the electrical energy is introduced inductively.
  • the gases formed in the reduction of the metal oxides present in the melt are partially post-combusted by means of oxygen or oxygen-enriched air in the upper region of the metallurgical vessel.
  • the partial post-combustion of CO to CO 2 provides part of the energy required to cover the heat losses and to reduce it.
  • Another embodiment of the method according to the invention is characterized in that the energy required is partly introduced by means of a burner provided in the metallurgical vessel.
  • the melt is advantageously stirred during the reduction and or during the introduction of energy, preferably by rinsing the floor.
  • the metallurgical vessel is equipped with a device for stirring, for example floor washing elements or other stirring devices known to the person skilled in the art.
  • the iron melt is preferably conditioned by heating it to a temperature suitable for a subsequent casting process, preferably by means of electrical energy.
  • a desired composition of the molten iron is advantageously set by adding alloy substances.
  • the gases produced in the metallurgical vessel are suctioned off and cleaned, the separated dust preferably being fed to the melting cyclone as a residue, since the dust contains iron components and also heavy metals.
  • the slag and the iron melt are expediently poured off separately.
  • a metal melt sump is expediently retained and used in the metallurgical vessel as a template with a high carbon content and high temperature for a new batch of melt.
  • the heat capacity of the residual melt and its carbon content make the process more uniform or the first reduction step of the new batch can be carried out until a certain minimum temperature and a very low carbon content are reached again.
  • This sump is advantageously covered with a certain amount of low-iron slag, which is preferably formed from fly ash, foundry sand and coke and / or coal, and the sump and slag are then used in the metallurgical vessel as a template for a new batch of melt.
  • This acidic starting slag brings about a considerable reduction in the melting temperature of the slag resulting after the reduction, so that the reduction can be carried out down to relatively low temperatures.
  • the reduction of the melt on the one hand and the conditioning on the other hand are carried out at separate locations, a transportable metallurgical vessel being used. This makes the control of the process steps even clearer and easier.
  • the Reduction of the melt and the introduction of electrical energy are carried out at separate locations, using a transportable metallurgical vessel.
  • Another advantage of the separate steps is that the process can be carried out semi-continuously, i.e. that the previous batch can be conditioned during the melt reduction phase of a batch.
  • at least two metallurgical vessels, preferably pans, are used.
  • the melt is preferably in the time in which no melt can be fed into the transportable metallurgical vessel, in particular if the metallurgical vessel for pouring and / or conditioning the melt and / or for introducing the electrical energy is at another location Separation vessel temporarily stored.
  • the melt between the deposition vessel and the transportable metallurgical vessel is temporarily stored in a stationary storage device for bridging process interruptions, such as heating periods, vessel changes, etc.
  • a storage device for the melt in the form of a tilting channel is advantageously provided subsequent to the outlet opening of the separating vessel. This is expediently lined with refractory material and / or equipped with a burner to cover heat losses.
  • the iron and heavy metal-containing residues are advantageously collected separately in heavy metal and low heavy metal residues and used separately in the melting cyclone, and heavy metals separated from the gases are fed to the heavy metal-rich residues when low-heavy metal residues are used.
  • the heavy metals separated from the gases are collected and used again in the melting cyclone up to an enrichment of the heavy metals desired for the removal, in particular regulated with continuous measurement of one or more heavy metal concentrations in the separated dust.
  • the heat losses from the melting cyclone and / or the separating vessel are preferably used to generate steam.
  • the melting cyclone and / or the separation vessel are expediently equipped with a cooling device, such as an evaporative cooling device.
  • the slag is allowed to solidify in a suitable manner after pouring, for example by means of a casting bed or dry granulation, and is used as a feedstock for cement production, for example as a clinker.
  • a plant according to the invention for recycling iron and heavy metal-containing residues, optionally with the addition of iron ore is characterized by the combination of the following features: an essentially vertical melting cyclone, which has a bottom opening for the escape of gases and melt, one or more opening into the melting cyclone , essentially horizontal feeds for solid feed materials and for gases and a
  • Ignition device a separating vessel directly coupled to the melting cyclone, which has a
  • Separating vessel escaping gases leads to at least one metallurgical vessel, which has at least one device for
  • Has molten iron and slag Has molten iron and slag, a device for transferring the melt from the melt outlet opening of the separating vessel into the metallurgical vessel and a device for electrical heating of the metallurgical vessel.
  • the exhaust pipe starting from the separation vessel is equipped with an opening for the supply of air or oxygen-enriched air.
  • the opening is preferably designed in the form of a sliding sleeve.
  • a device for blowing oxygen into the metallurgical vessel is preferably provided in order to afterburn the gases produced during the reduction.
  • the metallurgical vessel is advantageously equipped with a sufficiently large volume so that there is still enough space above the metal sump from the previous batch, the metal from the reduction and the resulting slag for the reduction reaction associated with foams.
  • the device for electrical heating is designed in the form of graphite electrodes or an inductive heating.
  • the metallurgical vessel is designed as a transportable vessel, in particular as a pan.
  • a transport device for moving the (r) metallurgical vessel (s) is advantageously provided.
  • Feeding devices are expediently provided for feeding lumpy and / or fine-grained materials into the metallurgical vessel, for example for fly ash, fine coal, etc.
  • a heat exchanger in particular a steam boiler, is preferably provided in the exhaust pipe starting from the separating vessel.
  • the oily sludges which usually have high proportions of organic components and therefore cannot be dried directly like the other residues, are premixed, for example, and charged into the feed container. From there, the sludge is metered via a feed system into a mixing and drying device 1, in which the charged material is dried indirectly by means of a thermal oil system.
  • the thermal oil generator is heated, for example, with natural gas burners.
  • the exhaust gas from the dryer is used as combustion air so that no hydrocarbons are released.
  • the dried sludge is charged into a buffer tank and from there into the corresponding storage bunker.
  • the remaining sludges are dried in a continuously operating dryer 2 by means of a hot wind to the moisture content suitable for blowing into the melting cyclone.
  • the final moisture of the product is controlled via the exhaust gas temperature, which is directly proportional to the product moisture.
  • the exhaust gas from the dryer is roughly dedusted in a cyclone and fine in a bag filter.
  • the dried material is crushed and charged
  • residues and / or reducing agents such as mill scale or coal, are comminuted or ground in suitable devices 3 to a size that is acceptable for blowing into the melting cyclone, and then stored in a corresponding silo.
  • Dusts are conveyed pneumatically into storage silos without pretreatment, from where they are continuously removed in order to be mixed with the other residues and, if slag formers are not sufficiently contained in the residues, additives in appropriate proportions. However, the addition of additives should be avoided as far as possible by selecting an appropriate mixture of various residues containing sufficient slag formers.
  • the feed materials, residues, reducing agents and additives which should all be essentially water-free, are continuously introduced in the appropriate amounts into an intensive mixer 4 and homogenized. From the mixer 4, the mixture of substances reaches a coarse sieve 5, where particles larger than 4 mm are removed from the mixture.
  • the sieved mixture is stored in storage silos, preferably separately for residues rich and low in heavy metals.
  • the precisely weighed solid mixture with oxygen or oxygen-enriched air is essentially tangentially blown into the essentially vertical, cylindrical melting cyclone 6, swirled and ignited by a burner fed with oxygen and a gaseous fuel, which is integrated in the cyclone burner.
  • the cyclone burner has a fire control system, a flame detection system and a monitoring system.
  • a plurality of burners can also be provided at different points in the melting cyclone 6. Inside the melting cyclone 6, there is a reduction of the iron oxides and volatile heavy metals contained in the residues and, if appropriate, of iron ore, iron oxides predominantly being reduced to FeO and the volatile heavy metals to the metal.
  • the gases and the melt pass together into a directly coupled, i.e. Separation vessel 7 connected only via a suitable connecting piece, preferably arranged below the melting cyclone 6 - to clarify the apparatus unit, the melting cyclone 6 and the separation vessel 7 are provided with a dashed border in the figure - in which a separation of the melt and gases takes place.
  • the separating vessel is designed, for example, as a cylindrical vessel with a horizontal axis, which has an opening for the exit of gases and a second opening for the exit of the melt.
  • the separating vessel can, however, also be designed as a container which is at least partially bricked or lined with refractory material, in particular as a cylindrical container with a vertical axis or as a rectangular container.
  • Both the separating vessel 7 and the melting cyclone 6 are preferably equipped with a cooling device, for example in the form of a water-cooled double jacket construction or a steam-cooled pipe-pipe or pipe-web-pipe construction, in order to use their heat losses to generate superheated steam.
  • the cooling system is fed with boiler feed water or its circulating condensate.
  • the gases containing heavy metals are afterburned after they exit the separation vessel by means of air or oxygen-enriched air, which is blown in through an opening in the exhaust pipe, for example in the form of a sliding sleeve.
  • the evaporated heavy metals are converted into a solid oxidic form and form a fine dust in the gases.
  • the gases are preferably passed through a heat exchanger 8, for example a steam boiler, and cooled for the purpose of generating steam, a portion of the heavy metal dust being separated off.
  • automatic cleaning devices can be provided as well a device that removes the heavy metal dust from the cooling device and transports it to the corresponding silo, depending on whether the dust comes from heavy metal rich or low in residual materials.
  • the cooled gases are cooled further by admixing ambient air in order to obtain the filter 9, e.g. Bag filter to reach the required inlet temperature, where the heavy metal oxides are finally separated.
  • the cleaned gases are released into the atmosphere. If the residues are collected and used separately in heavy and low-heavy metals, the separated heavy metal oxide dust from low-heavy residues is fed to the heavy-metal-rich residues. Alternatively, the separated dust can be reused as a residual material while continuously measuring the heavy metal concentration until a desired concentration of heavy metals has occurred.
  • the gases containing heavy metals can be quenched after condensing from the separating vessel 7, condensed and the heavy metal oxides formed in the process can be wet-separated.
  • the melt is transferred from the separation vessel 7 via a tapping channel into a metallurgical vessel 10.
  • the vessel 10 is closed with a liftable and pivotable cooled lid provided with corresponding openings.
  • the main reduction of iron oxides takes place in the metallurgical vessel, the resulting slag being low in iron.
  • a carbon-containing reducing agent for direct reduction coke and / or coal and / or carbon-containing and / or hydrocarbon-containing residues, preferably fine coal, fine coke, carbon-containing dusts, tire shredders, plastic shredders, petroleum coke, etc., are used.
  • the carbon dissolved in the metal is used.
  • a stronger reducing agent for example ferrosilicon or aluminum, can be used alone or after the reduction with carbon-containing reducing agents, for economic reasons the second alternative is preferred.
  • the carbon monoxide formed in the direct reduction by reducing agents containing carbon and hydrocarbons can also be used to reduce the iron oxides. Fine-grain reducing agents are blown into the melt, for example, using refractory immersion lances or nozzles; however, a device for introducing lumpy materials into the metallurgical vessel 10 can also be provided.
  • a corresponding bath movement is advantageously generated by stirring devices, such as floor-flushing nozzles, both during the reduction period and during the heating period.
  • the gases produced during the reduction with carbon-containing reducing agents, predominantly CO, are advantageously afterburned with oxygen or oxygen-enriched air blown into the metallurgical vessel 10 in the upper region of the vessel 10 and thus improve the energy balance.
  • the actual heating of the metallurgical vessel 10 takes place by means of electrical energy, which can in part also be generated with the help of the superheated steam obtained by cooling.
  • the electrical energy can be introduced via electrodes or inductively, the device for heating the metallurgical vessel 10 in the case of a transportable metallurgical vessel also being able to be set up at another location independently of the vessel. It is thus possible to carry out the method semi-continuously with at least two transportable metallurgical vessels, the metallurgical vessels being transported to this device for intermediate or final heating.
  • the energy required for reducing and covering the heat losses is preferably introduced into the metallurgical vessel in part by means of a burner.
  • the time required for heating a second metallurgical vessel can also be bridged more easily with the help of the burner.
  • the dust-laden gases formed during the reduction are sucked out of the metallurgical vessel and cooled and cleaned of dust by means of known devices 11, 12, for example similar to devices 8 and 9.
  • the separated dust is used again in the melting cyclone as residual material, so that no waste that can be deposited is generated even in this process step.
  • two pans are preferably used as transportable metallurgical vessels 10, in which the melt is alternately reduced and conditioned or heated.
  • the melt is "temporarily stored in the separation vessel 7, which can be correspondingly large dimensions.
  • a stationary storage device for example a tipping channel equipped with refractory material and / or a burner, can be provided.
  • the molten iron is intended for casting, it can be heated to a temperature suitable for this process by means of electrical heating.
  • the molten iron is carburized, for example by adding coal, to a conventional pig iron analysis or adjusted to a desired composition by adding alloys.
  • molten iron and slag are poured off separately from the metallurgical vessel 10.
  • the poured-off, low-iron slag is solidified, for example, in casting beds or by means of a dry granulation system 13, comminuted and fed to the cement production.
  • a metal melt sump is retained in the metallurgical vessel 10, onto which new melt is poured out from the separation vessel 7.
  • the heat capacity of this residual melt and its carbon content in the event of carburization of the iron melt can be used for the reduction treatment of the new melt, which results in a more even process.
  • the melting sump is still covered with a certain amount of low-iron slag, which is formed from fly ash, foundry sand and coke and / or coal, and then used as a template in the metallurgical vessel 10.
  • the melt transferred from the separating vessel 7 into the metallurgical vessel 10 is diluted to a low iron content and the load on the vessel lining is thus considerably reduced. This also ensures a deep slag melting point.
  • the products heavy metal concentrate, iron melt and slag are obtained in consistent quality as 100% recyclable substances, with no unusable waste being produced.
  • steam is generated, which contributes to the economy of the process.
  • Example 1 illustrating the utilization of residues rich in heavy metals
  • Example 2 illustrating the utilization of residues low in heavy metals.
  • the resulting melt and the gases containing heavy metals were separated in the separating vessel.
  • the melt was transferred to the metallurgical vessel and reduced with 70 kg / t coal.
  • the electricity requirement of the device for heating the metallurgical vessel was 300 kWh / t.
  • An iron melt and a slag with the compositions given in Table 2 were obtained.
  • the CO-containing gases were afterburned with 30 Nm 3 / t oxygen in the upper area of the metallurgical vessel.
  • a heavy metal product with a composition given in Table 3 was separated from the gases containing heavy metals.
  • the resulting melt and the gases containing heavy metals were separated in the separating vessel.
  • the melt was transferred to the metallurgical vessel and reduced with 100 kg / t coal.
  • the electricity requirement of the device for heating the metallurgical vessel was 200 kWh / t.
  • An iron melt and a slag with the compositions given in Table 2 were obtained.
  • the CO-containing gases were afterburned in the upper area of the metallurgical vessel with 30 NmVt oxygen.
  • a heavy metal product with a composition given in Table 3 was separated from the gases containing heavy metals.

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  • Manufacturing & Machinery (AREA)
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  • Metallurgy (AREA)
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Abstract

L'invention concerne un procédé de réutilisation de résidus solides contenant du fer ou des métaux lourds avec addition éventuelle de minerai de fer. Ledit procédé consiste à introduire, à faire tourbillonner, et à amorcer les résidus avec des réducteurs contenant du carbone, et de l'oxygène dans un cyclone de fusion (6), à fondre lesdits résidus, à réduire et à évaporer des métaux lourds volatils, à réduire des oxydes de fer, à transporter les gaz et la fonte du cyclone de fusion (6) vers un contenant de séparation (7) couplé directement, dans lequel se déroule une séparation de la fonte et des gaz, à séparer les métaux lourds évaporés des gaz à l'extérieur du contenant de séparation (7), et à transporter la fonte dans un contenant métallurgique (10) séparé du contenant de séparation (6). Selon ledit procédé, on additionne d'une part des réducteurs dans le contenant métallurgique (10), on réduit en fer les oxydes de fer de la fonte avec formation d'une scorie pauvre en fer, et on applique d'autre part une énergie électrique destinée à couvrir au moins partiellement les pertes de chaleur et l'énergie de réduction, de manière à transformer les résidus contenant du fer et des métaux lourds en produits réutilisables à 100 %.
PCT/AT2001/000344 2000-11-06 2001-10-24 Procede et dispositif de reutilisation de residus contenant du fer ou des metaux lourds avec addition eventuelle de minerai de fer Ceased WO2002036834A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1872/2000 2000-11-06
AT0187200A AT409763B (de) 2000-11-06 2000-11-06 Verfahren und anlage zum verwerten von eisen- und schwermetallhältigen reststoffen, gegebenenfalls unter zugabe von eisenerz

Publications (3)

Publication Number Publication Date
WO2002036834A2 true WO2002036834A2 (fr) 2002-05-10
WO2002036834A3 WO2002036834A3 (fr) 2002-10-03
WO2002036834A8 WO2002036834A8 (fr) 2003-01-09

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PCT/AT2001/000344 Ceased WO2002036834A2 (fr) 2000-11-06 2001-10-24 Procede et dispositif de reutilisation de residus contenant du fer ou des metaux lourds avec addition eventuelle de minerai de fer

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AT (1) AT409763B (fr)
TW (1) TW514563B (fr)
WO (1) WO2002036834A2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005118890A3 (fr) * 2004-05-29 2006-04-27 Noel Warner Recuperation d'acier dans de la ferraille a trier
WO2007068025A3 (fr) * 2005-12-16 2007-08-09 Alfred Edlinger Procede de retraitement de poussieres metallurgiques ou de poussieres de polissage, et dispositif pour la mise en oeuvre de ce procede
CN104302792A (zh) * 2012-04-16 2015-01-21 奥图泰(芬兰)公司 用于处理非铁冶炼的渣滓的方法
EP3375764A1 (fr) * 2017-03-15 2018-09-19 Scholz Austria GmbH Procédé de traitement des laitiers métallurgiques
US20220389536A1 (en) * 2019-11-22 2022-12-08 Aurubis Beerse Plasma induced fuming furnace

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT6204U3 (de) * 2003-03-13 2004-01-26 Voest Alpine Ind Anlagen Verfahren zum verwerten von grober schredder-leichtfraktion in einem schmelzzyklon
CN104384171B (zh) * 2014-10-17 2017-05-31 耿兆翔 硫铁矿烧渣的资源化回收利用方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912501A (en) * 1971-05-11 1975-10-14 Castejon Javier Gonzalez De Method for the production of iron and steel
DE2307237C3 (de) * 1972-02-15 1979-01-25 Graenges Ab, Stockholm Verfahren zur Behandlung von Stahlschlacken
US3891427A (en) * 1972-10-12 1975-06-24 Lectromelt Corp Method for melting prereduced ore and scrap
DE3536635A1 (de) * 1985-10-15 1987-04-23 Kloeckner Humboldt Deutz Ag Verfahren und vorrichtung zur rueckgewinnung, insbesondere von eisen sowie von zink, blei und anderen ne-metallischen bestandteilen aus hocheisenhaltigen oxydischen materialien
FR2666592A1 (fr) * 1990-09-12 1992-03-13 Siderurgie Fse Inst Rech Dispositif d'extraction de metaux volatils, tels que le zinc et le plomb, sous forme d'oxydes a partir de dechets oxydes contenant du fer, et procede utilisant ce dispositif.
US5258054A (en) * 1991-11-06 1993-11-02 Ebenfelt Li W Method for continuously producing steel or semi-steel
DE4206828C2 (de) * 1992-03-04 1996-06-20 Tech Resources Pty Ltd Schmelzreduktionsverfahren mit hoher Produktivität
AUPP136398A0 (en) * 1998-01-16 1998-02-05 Noonan, Gregory Joseph Sustainable steelmaking by efficient direct reduction of iron oxide and solid waste minimisation

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005118890A3 (fr) * 2004-05-29 2006-04-27 Noel Warner Recuperation d'acier dans de la ferraille a trier
GB2437374A (en) * 2004-05-29 2007-10-24 Noel Alfred Warner Recovery of steel from contaminated scrap
GB2437374B (en) * 2004-05-29 2010-03-24 Noel Alfred Warner Recovery of steel from contaminated scrap
WO2007068025A3 (fr) * 2005-12-16 2007-08-09 Alfred Edlinger Procede de retraitement de poussieres metallurgiques ou de poussieres de polissage, et dispositif pour la mise en oeuvre de ce procede
CN104302792A (zh) * 2012-04-16 2015-01-21 奥图泰(芬兰)公司 用于处理非铁冶炼的渣滓的方法
US9435005B2 (en) 2012-04-16 2016-09-06 Outotec (Finland) Oy Method for processing slags of non-ferrous metallurgy
EP3375764A1 (fr) * 2017-03-15 2018-09-19 Scholz Austria GmbH Procédé de traitement des laitiers métallurgiques
US20220389536A1 (en) * 2019-11-22 2022-12-08 Aurubis Beerse Plasma induced fuming furnace

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WO2002036834A8 (fr) 2003-01-09
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AT409763B (de) 2002-11-25
ATA18722000A (de) 2002-03-15

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