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WO2025233369A1 - Four de fusion pour aluminium et ses alliages - Google Patents

Four de fusion pour aluminium et ses alliages

Info

Publication number
WO2025233369A1
WO2025233369A1 PCT/EP2025/062408 EP2025062408W WO2025233369A1 WO 2025233369 A1 WO2025233369 A1 WO 2025233369A1 EP 2025062408 W EP2025062408 W EP 2025062408W WO 2025233369 A1 WO2025233369 A1 WO 2025233369A1
Authority
WO
WIPO (PCT)
Prior art keywords
melting
basin
aluminium
holding
shaft
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.)
Pending
Application number
PCT/EP2025/062408
Other languages
English (en)
Inventor
Marco CHECCACCI
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2025233369A1 publication Critical patent/WO2025233369A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/04—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
    • F27B3/045—Multiple chambers, e.g. one of which is used for charging
    • 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
    • C22B21/00—Obtaining aluminium
    • C22B21/0084—Obtaining aluminium melting and handling molten aluminium
    • 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
    • C22B21/00—Obtaining aluminium
    • C22B21/0084—Obtaining aluminium melting and handling molten aluminium
    • C22B21/0092—Remelting scrap, skimmings or any secondary source aluminium
    • 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
    • C22B7/003—Dry processes only remelting, e.g. of chips, borings, turnings; apparatus used therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16—Remelting metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/02—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/02—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey
    • F27B1/025—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey with fore-hearth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/04—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces heated electrically, with or without any other source of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/19—Arrangements of devices for discharging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/20—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/20—Arrangements of heating devices
    • F27B3/205—Burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/02—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated of multiple-chamber type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere

Definitions

  • the present invention concerns a furnace for melting aluminium and aluminium alloys.
  • any reference to aluminium must be understood as a reference not only to the pure Al metal, but also - and indeed above all - to a metal alloy based on aluminium; in the following, also the generic terms "material” and “metal” must be understood as referring to aluminium or an alloy thereof, possibly also comprising impurities or foreign substances, both in the solid state and in the liquid state.
  • Aluminium melting has been a metallurgical process known and practiced for a long time, to make available aluminium in the molten state, to then be used in casting plants of various kind to obtain the desired pieces.
  • various processes and plants have been developed over the years that allow aluminium to be melted.
  • two temperatures are normally taken into consideration: a relatively low melting temperature at which the metal passes from the solid state to the liquid state (generally comprised between 550 and 700 °C, depending on the type of alloy) and a relatively high casting temperature (generally 150-200 °C higher) at which the liquid metal reaches the fluidity suitable for use in casting plants.
  • the perhaps most traditional melting system still in use is the one including the so-called crucible furnaces.
  • a crucible of refractory material e.g. silicon carbide
  • the solid material is loaded into the crucible, which is melted (by bringing it up to the casting temperature) thanks to the high temperatures that are obtained by heating the crucible with suitable means, either electric or combustion.
  • suitable means either electric or combustion.
  • a particular case of crucible furnaces is represented by the induction furnaces, in which the heating of the metal is operated electromagnetically, using the same aluminium charge as a secondary coil.
  • their success is greatly penalised by the high energy and investment costs, the management complexity and the modest quantities of metal they allow to melt.
  • a particular case of basin furnaces is represented by the dry-sole furnaces, in which the solid material is introduced into the basin by first passing through a slide, also heated.
  • the dirt that inevitably accompanies the solid material therefore does not end up directly in the molten metal bath, but deposits on the slide, improving the quality of the product a little.
  • the other defects of the basin furnaces remain, though.
  • furnaces The most modern and popular furnaces are currently the so-called tower or shaft furnaces. These furnaces have a funnel-shaped, vertically-developing melting shaft in which the solid material is introduced from the top; a controlled flow of hot gas, generated by a combustion system provided in the lowest portion of the vertical melting shaft, hits the charge of solid material from the bottom upwards, heating it up to the melting temperature and then causing it to melt. Melting, therefore, takes place, so to speak, dry: in fact, the metal - as soon as it melts - slides downwards into the funnel-shaped melting shaft and arrives on an inclined bottom, from which it is conveyed towards a holding chamber, flanked to (or located below) the melting chamber, located at a lower height.
  • one or more burners are provided that heat the holding chamber itself, so as to bring the molten metal to the casting temperature, thus making it suitable for use in the casting systems provided downstream.
  • the molten metal is withdrawn from the holding chamber in various ways, depending on the intended use.
  • tower furnaces are disclosed in US 4664702 A or EP 0400214 Al.
  • the tower furnaces reduce both energy consumptions and melting losses, but increase plant costs. In addition, they cannot easily be adapted to treat solid material coming from the recycling of aluminium objects, due to the high quantity of fine or very fine particle sized material, which in the vertical melting shaft easily tends to oxidize and generate a considerable quantity of slag. Disclosure of Invention
  • Aim of the present invention is to make available a new melting furnace for melting aluminium that allows to overcome at least in part the drawbacks of the aforementioned known furnaces.
  • this melting furnace for aluminium and its alloys comprises: a vertically-developing melting shaft adapted to be fed with aluminium in the solid state, heating members capable of generating a flow of hot gas that rises in the melting shaft, a hood above the melting shaft, provided with an upper opening for the discharge of hot gas from the melting shaft, characterized in that it further comprises a horizontally-developing melting basin, placed below the melting shaft in such a position to receive the molten aluminium by falling from the melting shaft and retain it, wherein the heating members are provided out of the melting shaft, in the melting basin.
  • This furnace somehow combines the structure of a tower furnace with the structure of a basin furnace.
  • the result is a very versatile furnace.
  • the loaded solid material fills the melting shaft completely. Since the heating members are provided in the melting basin and not in the melting shaft, the latter results to be less warm than in a traditional tower furnace; therefore, a part of the solid aluminium will melt like in a traditional tower furnace, but a part thereof (which is mainly the finest fraction, that tends to fall more easily and thus to cross more quickly the melting shaft) will arrive at the melting basin while still in the solid state and will melt only there, like in a traditional basin furnace, by immersion in the already molten metal, thus undergoing less oxidation.
  • the heating members are sized and adjusted so that they can both generate the flow of hot gas suitable for partially melting the aluminium in the melting shaft, and keeping the aluminium in the molten state in the melting basin.
  • the heating members are adapted to keep the molten aluminium present in the melting basin at a melting temperature.
  • the melting temperature depends on the specific material that is processed; for most aluminium alloys, the melting temperature is between 550 and 700 °C.
  • the heating members comprise gas burners placed in an upper vault of the melting basin.
  • This type of heating member is particularly suitable for generating the flow of hot gas necessary for melting the solid material in the melting shaft.
  • the melting furnace also comprises a holding basin, flanked to the melting basin and in communication with the melting basin through a window, and further heating members adapted to heat and keep the molten aluminium contained in the holding basin at a casting temperature, wherein the casting temperature is higher than the melting temperature.
  • the casting temperature depends on the specific material that is processed; for most aluminium alloys, the casting temperature is higher than the melting temperature by 150-200 °C.
  • the holding basin provided with the further heating members improves the efficiency of the furnace.
  • the heat generated by the further heating members remains confined in the holding basin alone and allows the molten material present therein to be heated up to the casting temperature; the heat produced is not instead dispersed in the melting shaft, where it is not necessary to raise the temperature beyond the melting temperature, which as mentioned is lower than the casting temperature.
  • the further heating members comprise electric heaters placed at an upper vault of the holding basin. Since it is not necessary or wanted to generate a flow of hot gases (as is the case in the melting basin), it is advantageous to use electric heaters, which have a significantly lower environmental impact.
  • the window is formed in a septum between the melting basin and the holding basin and extends vertically both downwards and upwards: downwards, up to a bottom of the holding basin and up to a bottom of the melting basin, upwards, up to a height lower than the upper vault of the holding basin and the upper vault of the melting basin, so that during operation of the melting furnace the window can be submerged, completely below the level of the molten aluminium contained in the melting basin and in the holding basin.
  • the window behaves like a siphon between the two basins; these basins, which form two communicating vessels containing the same liquid aluminium, are thus separated from each other by the siphon and therefore the heat dispersed from the holding basin (at casting temperature) towards the melting basin (at melting temperature, lower than the casting temperature) is reduced.
  • the furnace comprises a tubular duct for the exit of the molten aluminium from the holding basin, extended from a first end inside the holding basin located near the bottom thereof to a second end outside the holding basin located higher than the first end, and a pneumatic system for generating an increase in pressure in the holding basin, such as to push the molten aluminium into the tubular duct until it exits from the second end thereof. Thanks to this, the withdrawal of molten aluminium can be managed with the pneumatic system, easily and safely for operators.
  • the second end of the tubular duct is provided with a drain spout.
  • the molten aluminium can then be easily withdrawn by a suitable conveyor to take it to the subsequent plant, or even by a simple ladle, brought under the drain spout.
  • the bottom of the holding basin is provided with an emptying valve.
  • a valve allows, if necessary, the complete emptying of the holding basin, for example for maintenance and cleaning operations.
  • a valve can be used for the normal delivery of molten aluminium, if the tubular duct for the exit of the molten aluminium is not present in the third stage.
  • the melting basin is provided with a first cleaning door, placed on a side wall of the melting basin.
  • This first door facilitates the operations of maintenance and periodic cleaning of the furnace.
  • the holding basin is provided with a second cleaning door, placed on a side wall of the holding basin.
  • This second door also facilitates the operations of maintenance and periodic cleaning of the furnace.
  • fig. 1 is a schematic sectional plan view of a melting furnace according to the invention, according to plane G-H in fig. 2; fig. 2 is a schematic vertical sectional view of the melting furnace of fig. 1, according to plane A-B in fig. 1; fig. 3 is a schematic vertical sectional view of the melting furnace of fig. 1, according to plane C-D in fig. 1; fig. 4 is a schematic vertical sectional view of the melting furnace of fig. 1, according to plane E-F in fig. 1.
  • the figures show a melting furnace 1 for melting aluminium and aluminium alloys, schematically represented according to different section planes.
  • the furnace 1 is intended to produce molten aluminium starting from input material formed by a charge of solid aluminium, typically supplied in ingots (tendentially of high purity) or recovered scrap, in which in addition to aluminium there are more or less significant quantities of other materials, either metallic or not; the ingots have well-defined sizes and shape, whereas the scrap has extremely variable shapes and sizes, from a few centimetres up to sizes even greater than those of the ingots.
  • the melting furnace 1 comprises a first stage 10, a second stage 20 and a third stage 30, in which the material is treated in sequence.
  • the first stage 10 comprises a melting shaft 11 with a substantially vertical development, surmounted by a hood 12 extended upwards up to an opening 13, from which the fumes generated in the melting of the aluminium in the melting shaft 11 exit. Downwards, the melting shaft 11 comprises a bottom zone 14 towards which the material descends while it is being treated. The bottom zone 14 of the melting shaft 11 is tilted, so as to convey the material that reaches it by force of gravity.
  • the hood 12 is provided with a loading door 18, through which the solid material to be melted is introduced into the melting shaft 11.
  • the second stage 20 comprises a melting basin 21, which is flanked to the bottom zone 14 of the melting shaft 11 and is open directly on this bottom zone 14, so as to receive by falling (thanks to the force of gravity) both the molten aluminium that is pouring on the bottom zone 14 itself, and the aluminium that is still in the solid state.
  • the melting basin 21 has a lower bottom 22 and an upper vault 23, as well as side walls 24. In the melting shaft 11, no heating members are provided.
  • the temperature of the molten aluminium contained in the melting basin 21 is kept slightly higher than the melting temperature, i.e. it is not raised up to the casting temperature; in figures 2, 3 and 4, the level of the molten aluminium contained in the melting basin 21 is indicated with LI.
  • the third stage 30 comprises a holding basin 31, flanked to the melting basin 21.
  • the holding basin 31 has a lower bottom 32 and an upper vault 33, as well as side walls 34.
  • the bottom 32 of the holding basin is substantially at the same height as the bottom 22 of the melting basin 21; preferably both bottoms are inclined towards withdrawal points.
  • the holding basin 31 is separated from the melting basin 21 by a septum 35, extended from the bottom 32 up to the vault 33.
  • a window 36 which puts the melting basin 21 in communication with the holding basin 31, is formed in the septum 35.
  • the window 36 extends downwards up to the bottom 32 and to the bottom 22, while upwards it extends only as far as a height lower than the vault 23 of the melting basin 31, such as to remain submerged below a level L2 reached by the molten metal present in the holding basin 31 during operation of the furnace 1.
  • the window 36 then operates as a siphon and allows the melting basin 21 and the holding basin 31 to form a system of communicating but separate vessels.
  • Further heating members 37 are provided in the holding basin 31, for example and preferably electric heaters placed at the vault 33.
  • These third heating members 37 are sized and adjusted so as to bring and keep the aluminium contained in the holding basin 31 at the casting temperature, higher than the melting temperature at which the molten aluminium is kept in the melting basin 21; the molten aluminium at the casting temperature has the fluidity suitable to be used for the subsequent casting.
  • the third stage 30 then comprises a tubular duct 41 for the exit of the molten aluminium from the holding basin 31.
  • the tubular duct 41 extends from a first end 42 inside the holding basin 31 and located near the bottom thereof to a second end 43 outside the holding basin 31, located higher than the first end 42.
  • the second end 43 is optionally provided with a drain spout 44.
  • the third stage 30 further comprises a pneumatic system 45, for example a compressed air intake duct, capable of generating an increase in pressure in the holding basin 31, such as to push the molten aluminium into the tubular duct 41 until it exits from the second end 43.
  • a pneumatic system 45 for example a compressed air intake duct, capable of generating an increase in pressure in the holding basin 31, such as to push the molten aluminium into the tubular duct 41 until it exits from the second end 43.
  • the molten aluminium thus dispensed can be collected for using it, for example directly by means of a casting plant placed in the immediate vicinity of the melting furnace 1, or indirectly by means of a ladle (not shown in the figures) for its transfer where necessary.
  • the drain spout 44 may or may not be present.
  • the holding basin 31 is then provided with an emptying valve 46, on the bottom 32.
  • an emptying valve 46 it is possible both to completely empty the holding basin 31 (for example, for maintenance, cleaning or melting change operations), and to dispense the molten aluminium if the tubular duct 41 is not present (or cannot be used).
  • the melting furnace 1 also comprises doors that allow access to its interior with special tools for cleaning operations or (with the furnace stopped) maintenance operations; in the example illustrated, a first cleaning door 28, located on one of the side walls 24 of the melting basin 21, and a second cleaning door 38, located on one of the side walls 34 of the holding basin are provided.
  • a charge of material to be melted is introduced into the first stage 10, loading it into the melting shaft 11 through the loading door 18. Thanks to the action of the heating members 25, the aluminium in the melting shaft 11 is hit by the hot gases and starts melting; both the molten fraction and the fraction still in the solid state fall, on the inclined bottom zone 14. The molten aluminium is then collected in the melting basin 21, where it is kept in the molten state - at the melting temperature - by the heating members 25 themselves. Fractions of the material still in the solid state (typically the very fine fractions) can directly reach the melting basin 21 before melting; these material fractions therefore do not melt by direct action of the heating members 25, but by immersion in the molten material present in the melting basin 21. In the melting basin 21, the heating members 25 keep the material in the molten state and contribute to melting (indirectly, through molten aluminium) fractions of material that have reached the melting basin 21 still in the solid state.
  • the melting furnace 1 can be operated semi-continuously, by inserting a charge of solid material into the melting shaft 11 as soon as the previous charge has been partially melted and a sufficient portion of the melting shaft 11 has then been freed.
  • the molten aluminium also passes into the holding basin 31, through the window 36, which thus ensures that - when the pneumatic system 45 is not activated - the level L2 of the molten aluminium in the holding basin 31 is the same as the level LI of the molten aluminium in the melting basin 21.
  • the further heating members 37 keep the material in the holding basin 31 in the molten state and at the desired casting temperature.
  • the pressure in the holding basin itself is increased, by means of the pneumatic system 45.
  • the thrust of the pressure increase causes the molten aluminium to be pushed upwards where this thrust does not act, i.e. in the tubular duct 41 but also in the melting basin 21; in fact, the fact that the window 36 is below the level L2 of the molten aluminium prevents the pressure increase caused by the pneumatic system 45 on the molten aluminium in the holding basin 31 from also reaching the space above the molten aluminium present in the melting basin 21.
  • the level LI of the molten aluminium present in the melting basin 21 also rises, for example up to a level LI'.
  • This rise - which may arrive as far as the bottom zone 14 of the melting shaft 11 - favours the contact between the molten metal and the one still in the solid state, in particular the smaller-sized fractions of solid material which, as already mentioned, may tend to fall rapidly downwards.
  • aluminium melting is better, even if the solid material used comprises very small-sized fractions: these fractions can in fact quickly fall into the molten metal present in the melting basin 21 and melt by immersion, reducing the risk that they may oxidize or burn.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

La présente invention concerne un four de fusion comprenant un premier étage (10) qui comprend un arbre de fusion à développement vertical (11) et un second étage (20) qui comprend une cuve de fusion à développement horizontal (21), placée sous l'arbre de fusion (11) dans une position telle qu'elle reçoit l'aluminium tombant de l'arbre de fusion (11). Le premier étage (10) prend la structure d'un four à cuve mais n'a pas d'éléments chauffants, tandis que le second étage (20) prend la structure d'un four à cuve et est pourvu d'éléments chauffants capables d'envoyer également du gaz chaud vers le premier étage du four. Le résultat est un four très polyvalent.
PCT/EP2025/062408 2024-05-10 2025-05-06 Four de fusion pour aluminium et ses alliages Pending WO2025233369A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102024000010627 2024-05-10
IT202400010627 2024-05-10

Publications (1)

Publication Number Publication Date
WO2025233369A1 true WO2025233369A1 (fr) 2025-11-13

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Family Applications (1)

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PCT/EP2025/062408 Pending WO2025233369A1 (fr) 2024-05-10 2025-05-06 Four de fusion pour aluminium et ses alliages

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664702A (en) 1985-02-04 1987-05-12 Southwire Company Method of melting aluminum in a vertical shaft furnace
EP0400214A1 (fr) 1989-05-29 1990-12-05 Meichu Seiki Kabushiki Kaisha Four de fusion et de maintien
EP1491644A1 (fr) * 2003-06-26 2004-12-29 Honsel GmbH & Co. KG Procédé et dispositif pour la séparation de parties ferreuses d'alliages d'aluminium
US20090130619A1 (en) 2005-06-09 2009-05-21 Nippon Crucible Co., Ltd. Crucible-Type Continuous Melting Furnance
CN104668507A (zh) * 2013-11-29 2015-06-03 无锡市双全机械制造厂 低压铸造机的定量保温炉
CN103397196B (zh) * 2013-08-03 2015-12-23 福安市广源机电有限公司 一种浇压铸铝产品精炼装置及其工艺
JP2021146381A (ja) * 2020-03-21 2021-09-27 株式会社アクセル技研 二槽型低圧鋳造用溶湯保持炉
WO2023209944A1 (fr) * 2022-04-28 2023-11-02 株式会社ダイキエンジニアリング Four de fusion

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664702A (en) 1985-02-04 1987-05-12 Southwire Company Method of melting aluminum in a vertical shaft furnace
EP0400214A1 (fr) 1989-05-29 1990-12-05 Meichu Seiki Kabushiki Kaisha Four de fusion et de maintien
EP1491644A1 (fr) * 2003-06-26 2004-12-29 Honsel GmbH & Co. KG Procédé et dispositif pour la séparation de parties ferreuses d'alliages d'aluminium
US20090130619A1 (en) 2005-06-09 2009-05-21 Nippon Crucible Co., Ltd. Crucible-Type Continuous Melting Furnance
CN103397196B (zh) * 2013-08-03 2015-12-23 福安市广源机电有限公司 一种浇压铸铝产品精炼装置及其工艺
CN104668507A (zh) * 2013-11-29 2015-06-03 无锡市双全机械制造厂 低压铸造机的定量保温炉
JP2021146381A (ja) * 2020-03-21 2021-09-27 株式会社アクセル技研 二槽型低圧鋳造用溶湯保持炉
WO2023209944A1 (fr) * 2022-04-28 2023-11-02 株式会社ダイキエンジニアリング Four de fusion

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