EP1831406B1 - Procede et dispositif pour fabriquer des metaux et/ou des articles metalliques semi-finis - Google Patents

Procede et dispositif pour fabriquer des metaux et/ou des articles metalliques semi-finis Download PDF

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Publication number
EP1831406B1
EP1831406B1 EP05812354A EP05812354A EP1831406B1 EP 1831406 B1 EP1831406 B1 EP 1831406B1 EP 05812354 A EP05812354 A EP 05812354A EP 05812354 A EP05812354 A EP 05812354A EP 1831406 B1 EP1831406 B1 EP 1831406B1
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EP
European Patent Office
Prior art keywords
charge material
melting unit
carrier gas
partial
feedstock
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.)
Expired - Lifetime
Application number
EP05812354A
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German (de)
English (en)
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EP1831406A1 (fr
Inventor
Martin Schmidt
Johannes Schenk
Franz Hauzenberger
Josef Stockinger
Johann Wurm
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
Posco Holdings Inc
Original Assignee
Siemens VAI Metals Technologies GmbH and Co
Siemens VAI Metals Technologies GmbH Austria
Posco Co Ltd
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Application filed by Siemens VAI Metals Technologies GmbH and Co, Siemens VAI Metals Technologies GmbH Austria, Posco Co Ltd filed Critical Siemens VAI Metals Technologies GmbH and Co
Publication of EP1831406A1 publication Critical patent/EP1831406A1/fr
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Publication of EP1831406B1 publication Critical patent/EP1831406B1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0086—Conditioning, transformation of reduced iron ores
    • C21B13/0093—Protecting against oxidation
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C21B13/143—Injection of partially reduced ore into a molten bath
    • 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
    • C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
    • C21B2100/44—Removing particles, e.g. by scrubbing, dedusting

Definitions

  • the invention relates to a method for producing metals and / or metal precursors, in particular pig iron and / or pig iron precursors, wherein a, in particular finely particulate, at least partially reduced, metal-containing feedstock, using a pneumatic conveying, by means of a transport gas stream, in the form of a media stream formed from the feedstock and the transport gas stream, is introduced into a melting unit, in particular a melter gasifier, for further processing.
  • the invention further relates to a device for producing metals and / or metal precursors, in particular pig iron or pig iron precursors, from a, in particular finely particulate, metal-containing feedstock, with a melting unit, for further processing of the feedstock, in particular a melter gasifier, with a device for pneumatic transport the feedstock by means of a transport gas stream.
  • a device for producing metals and / or metal precursors in particular pig iron or pig iron precursors, from a, in particular finely particulate, metal-containing feedstock, with a melting unit, for further processing of the feedstock, in particular a melter gasifier, with a device for pneumatic transport the feedstock by means of a transport gas stream.
  • the object is achieved according to the invention according to the method according to the characterizing part of claim 1 and the device according to the characterizing part of claim 9.
  • the entry of the feedstock in the melting unit is carried out separately and independently of each other at least two entry points, now an individual entry at each entry point is possible. This can be done continuously but also in batches, ie in quantity limited packages.
  • a significant advantage is achieved, namely that the entry of the subsets of the feedstock in the smelting unit is locally and quantitatively controllable, so that by means of the feed a targeted distribution of feedstocks in the melter gasifier is possible.
  • This offers advantages, in particular when feeding with fine-particle feedstocks.
  • the described measures make it possible to achieve significantly improved process control in the smelting unit since, by influencing the distribution of the starting materials, an optimal distribution between the starting material and other process substances, such as, for example, Coal, is possible. It has proven to be advantageous that the separation of the media stream into 2 to 8 sub-media streams ensures a favorable entry.
  • the design with a large number of independent feed points ensures targeted feeding of the melting unit, so that a controlled distribution of the feedstock in the melting unit is possible. From experiments it could be determined that an advantageous distribution of the starting material and, for example, a coal carrier is possible even at six entry points.
  • the medium stream is separated into at least two independent partial media streams prior to separation of the transport gas stream, which can then be processed separately from each other or introduced independently into the smelting unit, wherein before the entry of the feedstock at each partial media flow a deposition of Partial transport gas takes place.
  • the separation into partial media streams achieves an even better influenceability of the feedstock entry and thus the process control.
  • the ability to use batch-independent at any point allows systematic process optimization by exploiting the variability of the system.
  • a process-specific gas in particular process gas from the smelting unit, is used as transport gas for conveying the feedstock.
  • process-specific gas initially creates a cost-effective solution.
  • the process gas used as transport gas can be circulated, so that there are advantages as well. Due to the pneumatic transport of the at least partially reduced and metal-containing starting material only a small amount of transport gas is needed. Alternatively, e.g. also the process gas from a treatment reactor are used for transport.
  • a non-process gas in particular nitrogen
  • transport gas for conveying the starting material.
  • nitrogen is often present in steel mills in sufficient quantities and under pressure, so that existing resources can also be taken into account.
  • a further transport gas is used for the transport of the feedstock in addition to a process-own gas.
  • temporary additional transport gas is used for example for temporarily increasing the delivery capacity.
  • the feedstock is controlled continuously or in batches introduced into the transport gas stream.
  • These two concrete possibilities allow an adaptation to the respective process conditions by a corresponding provision of the feedstock.
  • the entry is controlled so that an accurate loading of the smelting unit is ensured. This includes not only an exact amount of charge with respect to the amount of feed but also an exact local distribution of the feedstock or materials in the melting unit.
  • the separated transport gas stream can be introduced into a treatment reactor after gas purification. Due to the amounts of gas needed to transport the feedstock, further utilization or utilization of the transport gas makes sense for economic as well as process engineering reasons. Thus, the amount of transport gas to be removed can be almost completely used again after appropriate cleaning in the treatment reactor.
  • the controlled entry of the subsets of the starting material is realized via a targeted removal of the separated sub-transport gas streams.
  • the starting material or its subsets is temporarily stored in a storage container prior to entry into the melting unit.
  • This caching on the one hand allows the batch entry into the smelting unit, on the other hand, the storage of a separation of the entry of the previous promotion of the feedstock possible, so that a more stable process management, which is safer with regard to disturbances or deviations in individual process parameters exists.
  • the feedstock or its subsets is pressurized. This includes a targeted adjustment of the pressure for further processing.
  • a particularly simple entry of the feedstock e.g. only possible by gravity into the smelting unit.
  • simple entry devices can be realized, so that expensive valves or controls are no longer necessary.
  • the pneumatic conveying or any intermediate storage of the feedstock can be decoupled from the entry into the smelting unit.
  • the storage container acts as a lock between working at different pressure levels process parts.
  • the pressure under which the pneumatic delivery takes place can thus be optimally adjusted independently of the operating pressure of the smelting unit without the need for adaptation to the pressure of the smelting unit. This results in easier-to-control and less expensive processes or system parts.
  • At least one reduced, iron-containing additive and / or an additive is introduced into the smelting unit in addition to the feedstock.
  • This option can be used to influence the process even better or to intervene in a corrective way.
  • the entry of at least one additive and / or an additive can be carried out together with the feedstock or even separately, whereby the same entry points or entry facilities can be used. It is thus possible to introduce additives, additives or starting material alternately using the same feeding devices. Also an entry of aggregates and / or the additives in the aforementioned intermediate container and the joint entry of the substance mixture is possible, so that a precise entry is also locally clearly limited possible, which is technically a very flexible solution.
  • the device according to the invention according to the characterizing part of claim 11, a simpler structure suitable for performing said method is offered.
  • a robust plant can be created which allows full flexibility with respect to independent entry at different entry points.
  • the separation device it is additionally possible to improve the melting process, especially when using fine-particle feedstocks, and to reduce the problem of a strong fines discharge from the melting aggregate together with process gas. Since almost completely can be dispensed with moving parts in the device, a very robust and easy to maintain system is created.
  • the insertion device is designed as a line that allows control in conjunction with a valve.
  • the feedstock can have temperatures of over 800 ° C, it can also lead to a high thermal load of the system parts, which are in contact with the feedstock. This also results in the demand for a robust and technically simple device that is achieved by the described separation device.
  • the separating device for dividing the media stream, formed from feedstock and transport gas stream is suitable in at least two partial media streams.
  • the partial media streams each consist of a subset of the feedstock and a partial transport gas stream, so that they can be further treated individually.
  • the separation of media streams also succeeds in hot and fine particulate feedstocks and can be realized by simple and robust facilities.
  • the separation is also possible in a variety of sub-streams and therefore offers even in complex systems a simple plant realization. Due to the partial media streams there is also the advantage that they are introduced into the melting unit in different ways can be introduced, wherein using separators only the subsets of the feedstock are introduced.
  • the separating device via a line with the means for pneumatic transport of the feedstock and / or at least two, in particular six, lines with the melting unit can be connected.
  • separating into subsets of the feedstock or in sub-media streams of feedstock can be passed to the entry points of the smelting unit. It is possible to make do with fixed connections, so there are no moving or flexible components needed, so there are no maintenance-intensive system components.
  • the separator can be designed so that it directs a media stream of transport gas and feedstock or even the feedstock to the entry points of the smelting unit. Essential is the individual and independent supply to the entry point.
  • the number of leads to the smelting unit can be made according to the requirements of the entry, as a desired distribution of the feedstock in the smelting unit can be generated. It has been shown that it is advantageous to provide at least six supply lines in the melting unit, since already here an advantageous distribution of the starting materials in the melting unit can be set.
  • the device for pneumatic conveying (3) is directed in the conveying direction substantially upwards. So deposits or caking can be avoided.
  • the device for the pneumatic transport of the starting material can be connected to the treatment reactor via at least one line.
  • the connecting line allows the promotion of at least partially reduced, metal-containing starting material, with the possibility of promoting warm feed a great advantage, namely the use of the energy content of the feedstock for the melting process and thus a more efficient process is achieved.
  • the combination of a melting unit with a treatment reactor results in known advantages, namely the use of a hot, for example prereduced metal-containing starting material, since an energy-efficient process is made possible during processing.
  • the properties of the processing units can be used well and advantageously, in particular in the processing of fine-particle metal carriers.
  • the connection of the treatment reactor with a melting unit by means of a device for the pneumatic conveying of the reacted in the treatment reactor metal carrier in the melting unit, leads to a very advantageous system for carrying out the manufacturing process.
  • the input of the feedstock into the device can be done directly or by means of separate devices, so that depending on the process and requirements, an adequate plant design is possible.
  • a separating device in particular a cyclone, is provided for separating the partial amount of the starting material from the partial transport gas stream for at least one of the partial media streams.
  • dividing the media stream into partial media streams these can be treated independently of each other.
  • a separation device for at least one of the partial media streams it is possible to provide partial quantities of the starting material which are then available as required for entry into a smelting unit. It is conceivable to introduce individual partial media streams directly into the smelting unit, while at a portion of the partial media streams before the entry, the deposition of the transport gas.
  • the batch entry is combined with a continuous entry such that at some entry points there is continuous promotion and at others a batch entry.
  • An advantageous embodiment of the device according to the invention provides that the at least one separation device by means of lines with the melting unit, for introducing the starting material, optionally with a gas treatment device, in particular a wet cleaning device, for cleaning the transport gas stream, and is connectable to the separating device.
  • a gas treatment device in particular a wet cleaning device
  • the transport gas can be treated in such a way that it can in turn be used in the overall process or in individual process steps.
  • the treatment may be, for example, a wet treatment, such as a wash, whereby dust and other fine particles are removed.
  • the cyclone can be connected via a gas discharge to the gas treatment device, while the separated feed can be fed via a line to the melting unit.
  • the partial media flow is fed to the separation device via a line, so that all connection lines essentially manage without moving parts and there is a simple and secure system.
  • a control valve for controlling the partial media flow is provided in the line between the separation device and the gas treatment device. Due to the control valve in the line for the removal of the transport gas from the separator a very effective and technically simple way to control the media flow and thus the transported subset of the feedstock is given. Thus, an independent control of the partial flow rates by a corresponding intervention on the discharged from the separator to the gas treatment device transport gas, no valves or controls with the media flow itself must be brought into contact, so that the wear problem does not arise in such controls.
  • the gas treatment device via a line with a process gas discharge from the melting unit, for the purification of process gas from the melting unit, connectable.
  • an insertion device comprises a pressurizable storage container for introducing the deposited starting material or its subsets into the melting unit and / or at least one valve for the controlled entry of the feedstock. Due to the individual feed of the feedstock, at each entry point, the subset can be made available independently of each other to allow for batch and continuous feed into the smelting aggregate.
  • the valve is designed as a slide valve or as a pneumatic valve, in particular a self-locking L-valve.
  • Such valves have proven to be advantageous because in the control of material flows in metallurgical plant construction especially the special stresses in terms of temperature and abrasion are significant. Accordingly, it is necessary to provide facilities that meet these requirements.
  • L-valves have been shown by their simple structure to be advantageous.
  • Such valves consist of a double-L-shaped delivery pipe. When weglude the transport gas flow remains in the middle pipe section of the feedstock, so there is a self-locking effect. With a sufficiently large length of the middle pipe section and the remaining material therein, an effective barrier effect can be achieved.
  • the simple construction achieves a very high process reliability of the valve. A high thermal capacity is another consequence of this design.
  • An advantageous embodiment of the device according to the invention provides a pressurizable buffer container for receiving the media flow, which can be connected to the device for pneumatic transport and at least two entry points, optionally via at least two lines with the melting unit.
  • the buffer container according to the invention provides additional process reliability. Due to the volume, it is possible to decouple the transport of the feed completely from the entry into the smelting unit. In this case, the buffer volume is chosen so high that even in the case of disturbances during transport sufficient loading of the melting unit is possible. Alternatively, the buffer function can also be used in such a way that feed material is conveyed to the buffer container only temporarily and if necessary. Due to the at least two entry points line connection of the buffer tank with the melting unit and a stable and simple device is realized. An embodiment with at least six connections between the buffer container and the melting unit has proved to be advantageous, so that a locally variable charging of the melting unit is possible.
  • a loading device comprises a storage container, which is connectable via a line to the buffer container, wherein the storage container can be acted upon with transport gas from the buffer container.
  • the buffer container can also take over the function of the separating device, so that the media stream delivered by the device for pneumatic conveying is introduced into the buffer container, then the transport gas stream is separated and the starting material can be introduced into the melting unit divided by at least two supply lines.
  • the entry of each of the at least two subsets of the feedstock can take place via a, respectively between the buffer tank and the melting unit arranged, storage container and associated valves, so that an additional storage function and a separation of the pressure adjustment of the buffer tank is possible.
  • a pressure equalization line between the buffer tank and the at least two storage tanks is created, so that the loading of the storage tank by a change from pressure equalization between the aggregates and pressure increase in the storage tank, for pressure adjustment to the melting unit is possible.
  • At least one supply device comprising a supply container and / or a lock, is provided for introducing metal-containing additives and / or additives into the melting aggregate, preferably via the buffer container and / or the input device.
  • the processing unit it is often necessary to supply the processing unit with further processing auxiliaries.
  • separate facilities are provided, which allow a controlled supply of aggregates and / or additives.
  • the supply can be done by a separate entry in the smelting unit or together with the feedstock.
  • the additives and / or additives are introduced together with the feedstock into the melter, these substances being e.g. be added to the feed in the buffer tank or in the entry device.
  • a steering device for distributing or positioning the charge in the melting unit is provided at at least one entry point at which the feedstock and optionally additives and / or additives are introduced into the melting unit.
  • This special device allows a targeted and even better entry of the feedstock in the melting unit, since an additional possibility of positioning the feedstock is realized in the melting unit by the steering device.
  • steering devices e.g. pivotable chutes are used, which allow a distribution of the feedstock from the respective entry point.
  • the device is provided as a separating device, a dynamic distributor for distribution or positioning of the feedstock and optionally additives and / or additives in the melting unit.
  • the distributor can be connected via a feed line to the separating device, optionally to the storage container or to the buffer container and via at least two lines to the melting unit.
  • the dynamic distributor allows by an active steering element, the individual supply to individual entry points in the melting unit or to the buffer tank or to a storage device.
  • the dynamic distributor is based on a movable steering device, such as a chute, and several outlets and provides another Possibility for the separation of the input material and for an independent supply line via separate entry points.
  • At least one pressurizable feed device in particular a feed container, and at least one valve for continuous or batch entry of the feedstock into the transport gas stream are provided between the treatment reactor and the pneumatic conveying device.
  • a feed container In addition to the direct and continuous task of the feedstock in the device for pneumatic conveying, it has been found to be advantageous if this is done by its own and réellebeaufschlagbare device.
  • different pressure levels e.g. be balanced between the treatment reactor and the device for pneumatic transport.
  • a specific embodiment provides at least one feed container and a valve for the controlled task of the feedstock in the device for pneumatic transport.
  • a delivery device in particular a screw conveyor, and / or an ejector is / are provided instead of the valve.
  • the screw conveyor is particularly suitable for the continuous application of the feedstock.
  • At least one feeding device and an upstream container are provided for increasing the pressure, wherein a lock-like feed with feedstock and an increase in pressure are possible. Due to the arrangement, the feeding device and the container can be operated together similar to locks. After filling the upper container this is separated by a valve from the treatment reactor and the feed introduced into the feed container. After separation of the two containers by means of a valve, the task can be carried out in the device for pneumatic transport after a pressure adjustment.
  • At least two feed devices connected in parallel are provided for alternately filling or emptying the feed devices.
  • This embodiment is advantageous, above all, in the case of continuous charging, since continuous filling of the feedstock can be achieved by alternately filling and emptying the feed container.
  • the device for pneumatic transport has at least one supply line for a further transport gas.
  • the additional transport gas can be taken from an external gas source or else a supply network and fed to the device for pneumatic transport. This is done by a supply line to the device for pneumatic transport.
  • the feedstock is at least partially reduced in the treatment reactor 1 and over the Feeding device 2 of the device for pneumatic conveying 3 supplied.
  • the feeding device 2 comprises two feed containers 4a and 4b, which are connected via lines 5 and 6 with the treatment reactor and each other.
  • a valve 7 is provided.
  • a valve 8 is provided, which is designed as a self-locking L-valve.
  • a supply line 9 is provided for the transport gas.
  • the two feed containers 4a and 4b can be pressurized via lines 9a with the transport gas.
  • the device for pneumatic conveying 3 is connected to a separating device 10, which enables a separation of the medium flow in partial media streams.
  • the number of lines 11 can be selected according to the process requirements, with six lines 11 already allow an advantageous loading of the melting unit 12.
  • the separating device is connected via the lines 11, each with a separating device 13, which separates the transport gas from the starting material.
  • the feedstock is introduced into the smelting unit 12 by a feeding device 14, each comprising a storage container 15 and a valve 16.
  • a feeding device 14 each comprising a storage container 15 and a valve 16.
  • the valve 16 may be designed as a self-locking L-valve.
  • the separation device 13 is connected via a line 17, which has a control valve 18, with a line 19 for the discharge of process gas from the melting unit 12.
  • Via a line 20 the transport gas and the process gas from the melting unit 12 are supplied together to a gas treatment device 21.
  • the cyclone 22 solids are separated and fed through storage tank 23 to the smelting unit.
  • the purified gas can be passed via a line 24 into the treatment reactor 1.
  • the treatment reactor 1 has a line 25 for the removal of process gas.
  • Fig. 2 shows a variant of the feeding device 2, wherein instead of the valve, a screw conveyor 26 is provided. This serves for the controlled discharge of the feedstock, wherein the feedstock is introduced by means of an ejector 27 in the transport gas flow.
  • Fig. 3 shows an advantageous embodiment of the task device 2, wherein two parallel arranged feed containers 4a and 4b are provided. Over a Supply line, which splits in two connecting lines 49 and 50 with the associated valves 28 and 29, the two feed containers 4a and 4b are alternately charged with feedstock.
  • the task in the transport gas flow can, for. B. via augers 30 and 31 done.
  • FIG. 4 is shown a direct promotion of the feedstock from the treatment reactor 1 to a separator 10.
  • additional transport gas can be introduced into the device for pneumatic conveying 3.
  • the means for pneumatic transport can be separated by means of a valve 33 from the treatment reactor 1, so that so that the promotion can be controlled.
  • the transport gas withdrawn at the separation device 13 is fed to a wet scrubber 34 and the purified gas or solids or sludge is discharged from the process via lines 35 and 36, respectively.
  • Fig. 5 shows a specific embodiment of the invention, wherein a buffer tank 37 is provided.
  • This has in addition to its function as a buffer and a separator, so that the supply of the media flow through the device for pneumatic conveying 3 without prior separation of the transport gas flow.
  • This takes place after entry into the buffer tank 37, wherein this is formed in its lower part such that the feedstock is separated in subsets.
  • the entry of the feedstock via one storage tank 15 and two valves 16 and 38, wherein the melting unit facing valve 16 can be designed as a self-locking L-valve 16a or as a slide valve 16b.
  • About the Transportgasab Arthur 39 and the line 19 for the discharge of process gas from the melting unit 12, the transport gas and process gas are fed to a gas treatment device.
  • the purified gas mixture can be supplied via a line 24 to the treatment reactor 1.
  • a feed device 40 consisting of a feed container 41, a lock 43 and associated valves 42 and 44 is provided.
  • the additives or additives can thus be added to the feed before its entry, with versions with a separate entry in the smelting unit are possible.
  • Fig. 6 shows a variant too Fig. 5 , wherein the starting materials are conveyed to the buffer vessel 37 with a pneumatic conveying 3 operated by process gas from the treatment reactor 1 and possibly additional transport gas. Since the Buffer tank is operated under a lower pressure than the melting unit, it is necessary that the feedstocks are pressurized prior to entry into the smelting unit 12. This takes place in the storage containers 15, wherein the pressure increasing device is not shown here in detail. Via the lines 45, the storage container can be acted upon after loading with transport gas and thereby relaxed again, so again a filling with feedstock is possible. The transport gas withdrawn from the buffer tank is treated in a wet scrubber 34 and the purified gas or solids or sludge is discharged from the process via lines 35 and 36, respectively.
  • Fig. 7 is shown a special steering device 46 for entry of the starting materials in the melting unit 12. This steering device allows additional positioning of the starting materials in the melting unit 12.
  • a central dynamic distributor 47 is provided, which is connected via lines 48 to the entry points and is supplied via a storage container 15 with feedstock.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

L'invention concerne un procédé et un dispositif associé pour fabriquer des métaux et/ou des articles métalliques semi-finis, notamment de la fonte brute et/ou des articles semi-finis en fonte brute. Selon l'invention, une matière contenant du métal, notamment de la matière sous forme de fines particules, est amenée par transport pneumatique, au moyen d'un flux gazeux, sous forme d'un écoulement d'agent constitué par ladite matière utilisée et par le flux gazeux de transport, dans un organe de fusion, notamment un gazéificateur de fusion, pour transformation. L'invention est caractérisée en ce que la matière utilisée est introduite après séparation du flux gazeux de transport, séparément en au moins deux points de chargement, de sorte que la matière utilisée est introduite en au moins deux parties indépendantes, en continu ou par lots.

Claims (25)

  1. Procédé pour fabriquer des métaux et/ou des articles métalliques semi-finis, en particulier de la fonte ou des articles semi-finis en fonte, dans lequel une matière de charge métallifère, au moins partiellement réduite, en forme de fines particules, est introduite dans un groupe de fusion, en vue de son traitement ultérieur, en utilisant un transport pneumatique au moyen d'un courant de gaz transporteur, sous la forme d'un courant de fluide formé de la matière de charge et du courant de gaz transporteur, caractérisé en ce que l'introduction de la matière de charge, divisée en quantités partielles et après séparation du courant de gaz transporteur, est effectuée en au moins deux points d'introduction, dans lequel ces quantités partielles sont introduites indépendamment l'une de l'autre et en continu ou par charges, dans lequel le courant de fluide est divisé en au moins deux courants de fluide partiels avant la séparation du courant de gaz transporteur, les courants de gaz transporteur partiels sont chaque fois séparés et les quantités partielles de la matière de charge sont introduites et l'introduction commandée des quantités partielles de la matière de charge est effectuée avec une évacuation ciblée des courants de gaz transporteur partiels séparés.
  2. Procédé selon la revendication 1, caractérisé en ce que l'un utilise comme gaz transporteur pour le transport de la matière de charge, un gaz fourni par le processus, en particulier un gaz du processus provenant du groupe de fusion.
  3. Procédé selon l'une ou l'autre des revendications 1 ou 2, caractérisé en ce que l'on utilise comme gaz transporteur pour le transport de la matière de charge, un gaz étranger au processus, en particulier de l'azote.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on utilise comme gaz transporteur pour le transport de la matière de charge, un autre gaz de transport en plus d'un gaz fourni par le processus.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le courant de gaz transporteur divisé ou au moins un courant de gaz transporteur partiel est introduit dans un réacteur de traitement après une épuration du gaz, éventuellement en même temps que du gaz de processus épuré provenant du groupe de fusion.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la matière de charge ou des quantités partielles de celle-ci est/sont accumulée(s) dans un réservoir d'accumulation avant leur introduction dans le groupe de fusion.
  7. Procédé selon la revendication 6, caractérisé en ce que la matière de charge ou des quantités partielles de celle-ci est/sont mise(s) sous pression.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'en plus de la matière de charge, on introduit dans le groupe de fusion une matière d'addition métallifère et/ou au moins un additif.
  9. Dispositif pour fabriquer des métaux et/ou des articles métalliques semi-finis, en particulier de la fonte ou des articles semi-finis en fonte, à partir d'une matière de charge métallifère en forme de fines particules, avec un groupe de fusion (12) pour le traitement ultérieur de la matière de charge, avec un dispositif de transport pour le transport pneumatique (3) de la matière de charge au moyen d'un courant de gaz transporteur et au moins un dispositif de séparation (13) pour la séparation du courant de gaz transporteur, caractérisé en ce qu'il est prévu un dispositif de division (10) pour diviser la matière de charge en au moins deux quantités partielles et des dispositifs d'introduction (15, 16a, 16b, 48) pour l'introduction commandée de la matière de charge dans le groupe de fusion (12), dans lequel le dispositif de division (10) est prévu pour la division du courant de fluide, composé de la matière de charge et du courant de gaz transporteur, en au moins deux courants de fluide partiels, chaque fois composés d'une quantité partielle de la matière de charge et d'un courant partiel de gaz transporteur, et le dispositif de séparation (13) est prévu pour au moins un des courants de fluide partiels en vue de la séparation de la quantité partielle de la matière de charge du courant partiel de gaz transporteur, dans lequel celui-ci est raccordé au moyen de conduites au groupe de fusion (12) en vue de l'introduction de la matière de charge et à un dispositif de traitement de gaz (21) en vue d'épurer le courant de gaz transporteur et au dispositif de division (10), et présente une soupape de commande (18) dans une conduite (17) entre le dispositif de séparation (13) et le dispositif de traitement de gaz (21, 22, 23) en vue de commander le courant de fluide partiel.
  10. Dispositif selon la revendication 9, caractérisé en ce que le dispositif de division (10) peut être raccordé au moyen d'une conduite (11) au dispositif de transport pneumatique (3) de la matière de charge et/ou au moyen d'au moins deux, en particulier six, conduites au groupe de fusion (12).
  11. Dispositif selon l'une quelconque des revendications 9 ou 10, caractérisé en ce que le dispositif de transport pneumatique (3) de la matière de charge peut être raccordé à un réacteur de traitement (1) au moyen d'au moins une conduite (24).
  12. Dispositif selon l'une quelconque des revendications 9 à 11, caractérisé en ce que le dispositif de transport pneumatique (3), vu dans la direction de transport, est orienté essentiellement vers le haut.
  13. Dispositif selon l'une quelconque des revendications 9 à 12, caractérisé en ce que le dispositif de traitement de gaz (21, 22, 23) peut être raccordé au moyen d'une conduite à une conduite d'évacuation de gaz de processus hors du groupe de fusion, en vue de l'épuration de gaz de processus provenant du groupe de fusion.
  14. Dispositif selon l'une quelconque des revendications 9 à 13, caractérisé en ce qu'un dispositif d'introduction comporte un réservoir d'accumulation (15) pouvant être mis sous pression pour l'introduction de la matière de charge séparée ou de quantités partielles de celle-ci dans le groupe de fusion (12) et/ou au moins deux soupapes (16, 16a, 16b, 38) pour l'introduction commandée de la matière de charge.
  15. Dispositif selon la revendication 14, caractérisé en ce que la soupape (16, 16a, 16b, 38) est une vanne à tiroir ou une soupape pneumatique, en particulier une soupape en L autobloquante.
  16. Dispositif selon l'une quelconque des revendications 9 à 15, caractérisé en ce qu'il est prévu un réservoir tampon (37) pouvant être mis sous pression pour recevoir le courant de fluide, et ce réservoir peut être raccordé au dispositif de transport pneumatique (3) et à au moins deux points d'introduction, éventuellement au moyen de conduites au groupe de fusion (12).
  17. Dispositif selon la revendication 16, caractérisé en ce qu'un dispositif d'introduction comporte un réservoir d'accumulation (15), qui peut être raccordé au réservoir tampon (37) au moyen d'une conduite, dans lequel le réservoir d'accumulation (15) peut être alimenté en gaz transporteur provenant du réservoir tampon (37).
  18. Dispositif selon l'une quelconque des revendications 9 à 17, caractérisé en ce qu'il est prévu au moins un dispositif d'alimentation (40), comprenant un réservoir d'alimentation (41) et/ou un sas (43), pour l'introduction de matières d'addition métallifères et/ou d'additifs dans le groupe de fusion (12), de préférence au moyen du réservoir tampon (37) et/ou du dispositif d'introduction.
  19. Dispositif selon l'une quelconque des revendications 9 à 18, caractérisé en ce qu'il est prévu, en au moins un point d'introduction où la matière de charge et éventuellement des matières d'addition et/ou des additifs sont introduits dans le groupe de fusion (12), un dispositif de déviation (46) pour répartir ou positionner la matière de charge dans le groupe de fusion (12).
  20. Dispositif selon l'une quelconque des revendications 9 à 19, caractérisé en ce qu'il est prévu comme dispositif de division un répartiteur dynamique (47) pour répartir ou positionner la matière de charge et éventuellement les matières d'addition et/ou les additifs dans le groupe de fusion, dans lequel le répartiteur peut être raccordé au moyen d'une conduite d'arrivée au dispositif de séparation (13), éventuellement au réservoir d'accumulation (15) ou au réservoir tampon (37), et au groupe de fusion au moyen d'au moins deux conduites (48).
  21. Dispositif selon l'une quelconque des revendications 9 à 20, caractérisé en ce qu'il est prévu entre le réacteur de traitement (1) et le dispositif de transport pneumatique (3) au moins un dispositif de distribution pouvant être mis sous pression, en particulier un réservoir de distribution (4b) et au moins une soupape (7) pour l'introduction continue ou par lots de la matière de charge dans le courant de gaz transporteur.
  22. Dispositif selon la revendication 21, caractérisé en ce qu'il est prévu, au lieu de la soupape, un dispositif de transport, en particulier un transporteur à vis (26) et/ou un éjecteur (27).
  23. Dispositif selon l'une quelconque des revendications 21 ou 22, caractérisé en ce qu'il est prévu au moins un dispositif de distribution (2) et un réservoir de distribution (4a) qui le précède en vue de l'augmentation de la pression, dans lequel un chargement de matière de charge par un sas et une augmentation de la pression sont possibles.
  24. Dispositif selon l'une quelconque des revendications 21 à 23, caractérisé en ce qu'il est prévu au moins deux dispositifs de distribution montés en parallèle (4a, 4b, 9a, 26, 27, 28, 29, 30, 31, 49, 50) pour le remplissage ou la vidange en alternance des dispositifs de distribution.
  25. Dispositif selon la revendication 9, caractérisé en ce que le dispositif de transport pneumatique présente au moins une conduite d'arrivée (32) pour un autre gaz transporteur.
EP05812354A 2004-12-23 2005-12-06 Procede et dispositif pour fabriquer des metaux et/ou des articles metalliques semi-finis Expired - Lifetime EP1831406B1 (fr)

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AT0216804A AT413821B (de) 2004-12-23 2004-12-23 Verfahren und vorrichtung zur erzeugung von metallen und/oder metallvorprodukten
PCT/EP2005/013042 WO2006072308A1 (fr) 2004-12-23 2005-12-06 Procede et dispositif pour fabriquer des metaux et/ou des articles metalliques semi-finis

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CN (1) CN101128607B (fr)
AT (2) AT413821B (fr)
AU (1) AU2005324161B2 (fr)
BR (1) BRPI0519403B1 (fr)
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TW (1) TWI417390B (fr)
UA (1) UA88796C2 (fr)
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WO2009146935A2 (fr) * 2008-06-05 2009-12-10 Kurt Himmelfreundpointner Procédé et dispositif pour l'acheminement de matériaux transportables dans des réacteurs
EP2789960B1 (fr) * 2013-04-12 2018-12-19 Refractory Intellectual Property GmbH & Co. KG Procédé destiné à déterminer l'état d'un revêtement réfractaire d'une cuve de fusion métallurgique
EP3150729A1 (fr) * 2015-10-02 2017-04-05 Primetals Technologies Austria GmbH Procede et dispositif de chargement de poutres en fer
CN108036648A (zh) * 2017-12-16 2018-05-15 江苏巨盈节能环保科技有限公司 高效电炉系统

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DE1188098B (de) 1962-10-24 1965-03-04 Siderurgie Fse Inst Rech Verfahren zur Regelung der Mengen beim Einblasen pulverfoermiger Stoffe in die Windformen von Hochoefen
IT1065114B (it) * 1975-08-22 1985-02-25 Peters Ag Claudius Dispositivo per l introduzione pneumatica continua di merce di in forma di polvere in piu punti di utilizzo
AT364965B (de) 1978-12-19 1981-11-25 Steyr Daimler Puch Ag Nockenwelle fuer einspritzbrennkraftmaschinen
JPS574128Y2 (fr) * 1980-06-19 1982-01-26
JPS5980704A (ja) * 1982-10-28 1984-05-10 Kawasaki Steel Corp 粉、粒状鉱石のたて型炉溶融還元方法
JPH0639608B2 (ja) * 1986-03-28 1994-05-25 新日本製鐵株式会社 鉄鉱石の予熱・還元装置
AT390622B (de) * 1988-10-25 1990-06-11 Voest Alpine Ind Anlagen Verfahren und anlage zur herstellung von fluessigem roheisen
JPH04361921A (ja) * 1991-06-07 1992-12-15 Hylsa Sa スポンジ鉄の輸送方法
AT404735B (de) * 1992-10-22 1999-02-25 Voest Alpine Ind Anlagen Verfahren und anlage zur herstellung von flüssigem roheisen oder flüssigen stahlvorprodukten
AT403930B (de) 1996-07-11 1998-06-25 Voest Alpine Ind Anlagen Verfahren zum chargieren von metallträgern in eine einschmelzvergasungszone und anlage zur durchführung des verfahrens
AT405651B (de) * 1996-10-08 1999-10-25 Voest Alpine Ind Anlagen Vorrichtung zum dosierten einbringen von feinteilchenförmigem material in ein reaktorgefäss
AT405840B (de) 1997-02-11 1999-11-25 Voest Alpine Ind Anlagen Verfahren und anlage zur herstellung von flüssigem roheisen oder flüssigen stahlvorprodukten
AT408991B (de) * 2000-04-28 2002-04-25 Voest Alpine Ind Anlagen Verfahren und anlage zur herstellung einer metallschmelze
AT411265B (de) * 2002-02-14 2003-11-25 Voest Alpine Ind Anlagen Verfahren und vorrichtung zur erzeugung von metallen und/oder metallvorprodukten

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AT413821B (de) 2006-06-15
KR101215484B1 (ko) 2012-12-26
CN101128607A (zh) 2008-02-20
KR20070091347A (ko) 2007-09-10
AU2005324161A1 (en) 2006-07-13
CA2591792C (fr) 2014-01-21
AU2005324161A2 (en) 2006-07-13
US8361189B2 (en) 2013-01-29
RU2007127837A (ru) 2009-01-27
JP2008525632A (ja) 2008-07-17
CN101128607B (zh) 2014-09-24
US20080047397A1 (en) 2008-02-28
BRPI0519403B1 (pt) 2016-03-29
TW200641142A (en) 2006-12-01
JP5034013B2 (ja) 2012-09-26
TWI417390B (zh) 2013-12-01
ATE449871T1 (de) 2009-12-15
US20120313300A1 (en) 2012-12-13
BRPI0519403A2 (pt) 2009-01-20
UA88796C2 (ru) 2009-11-25
CA2591792A1 (fr) 2006-07-13
ZA200705780B (en) 2009-01-28
RU2397252C2 (ru) 2010-08-20
US8236090B2 (en) 2012-08-07
WO2006072308A1 (fr) 2006-07-13
AU2005324161B2 (en) 2011-01-20
ATA21682004A (de) 2005-10-15
EP1831406A1 (fr) 2007-09-12

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