EP0224499A1 - Method for degasing a melting material and device for implementins such method - Google Patents

Method for degasing a melting material and device for implementins such method

Info

Publication number
EP0224499A1
EP0224499A1 EP86902781A EP86902781A EP0224499A1 EP 0224499 A1 EP0224499 A1 EP 0224499A1 EP 86902781 A EP86902781 A EP 86902781A EP 86902781 A EP86902781 A EP 86902781A EP 0224499 A1 EP0224499 A1 EP 0224499A1
Authority
EP
European Patent Office
Prior art keywords
ultrasonic
molten material
degassing
transfer channel
heads
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.)
Withdrawn
Application number
EP86902781A
Other languages
German (de)
French (fr)
Inventor
Jean Lathion
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.)
MAYTAIN Christian
Original Assignee
MAYTAIN Christian
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 MAYTAIN Christian filed Critical MAYTAIN Christian
Publication of EP0224499A1 publication Critical patent/EP0224499A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/06—Obtaining aluminium refining
    • C22B21/066—Treatment of circulating aluminium, e.g. by filtration
    • 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
    • C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
    • C22B9/026—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves by acoustic waves, e.g. supersonic waves
    • 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 present invention relates to a process for the degassing of a molten material and its implementation device.
  • the invention relates to a process for degassing a molten material during which the molten material is subjected to ultrasonic emissions.
  • the invention also relates to a device for implementing this process, comprising a device emitting ultrasound mounted integral with a transfer channel for the molten material connecting a furnace to a foundry.
  • the main advantage of the process of the invention consists in that the degassing by ultrasound completely eliminates the impurities without causing secondary reactions and without giving off harmful fumes. Consequently, the process of the invention makes it possible to eliminate all the additional equipment which is normally necessary for the treatment of these side reactions. The cost of the installation is therefore greatly reduced and the equipment not bulky. Power consumption is also greatly reduced.
  • Another important advantage of the process according to the invention lies in the fact that the emission of ultrasound on the molten material modifies the grain of the material and greatly reduces the residual inclusions, which facilitates casting. and filtering operations. This modification of the grain makes it possible to obtain a material which is more homogeneous and which has superior physical qualities.
  • the degassing process according to the invention is useful, in particular, for degassing molten non-ferrous metals and molten aluminum or its derivatives.
  • the device for implementing the method of the invention comprises ultrasonic heads which are mounted in the walls and the bottom of a transfer channel, which transfer channel is intended for the flow of molten material, for example molten aluminum, between a furnace and foundry equipment.
  • the transfer channel can also be connected to a recirculation channel which returns the molten material to the furnace, in the event that the foundry is not in action.
  • the ultrasonic heads can be connected to an adjustable ultrasonic generator, which makes it possible to vary the ultrasonic emissions according to need.
  • FIG. 1 is a schematic side view of a carrying out the method
  • Figure 2 is a schematic top view of the device of Figure 1
  • FIG. 3 shows, in section, the ultra-sonic heads mounted in the transfer channel
  • FIG. 4 shows a side view of the transfer channel equipped with the ultra-sonic heads.
  • FIGs 1 and 2 schematically represent an installation for melting aluminum using the method of the invention.
  • This installation comprises a transfer channel 2 which connects a furnace 1 to a foundry equipment 4.
  • the molten material 3 flows in the transfer channel 2 from the furnace 1 to the foundry 4.
  • the emission device ultrasound comprises a plurality of ultrasound heads 5 mounted in the walls 2' and the bottom 2'' of the transfer channel 21
  • the ultrasound heads 5 are connected via connection cables 7 to a adjustable ultrasonic generator.
  • Figure 2 also shows a recircu ⁇ tion channel 8 which allows the return of the molten material 3 into the furnace 1 when the foundry equipment 4 is not in use.
  • the ultrasonic heads 5 are fixedly mounted in the side walls 2' and the bottom 2'' of the transfer channel 2.
  • the principle of the invention is based on the emission of ultrasound acting on the molten material.
  • the number of ultrasonic heads and the positioning of these heads in the vertical, longitudinal and transverse plane, in the walls of the transfer channel, are not decisive for the correct operation of the method.
  • the number and positioning of the ultrasonic heads will be chosen according to the dimensions of the transfer channels and the casting parameters.

Abstract

Le procédé permet le dégazage d'une matière en fusion, en particulier de métaux non ferreux et d'aluminium, en soumettant la matière en fusion à des émissions ultra-soniques. La matière en fusion (3) coule dans un canal de transfert (2) depuis un four (1) jusqu'à une fonderie (4). Le dispositif d'émission d'ultra-sons comporte une pluralité de têtes ultra-soniques (5) montées dans les parois latérales et le fond du canal de transfert. Les têtes ultra-soniques (5) sont reliées à un générateur d'ultra-sons (6) réglable.The process allows the degassing of a molten material, in particular non-ferrous metals and aluminum, by subjecting the molten material to ultrasonic emissions. The molten material (3) flows in a transfer channel (2) from a furnace (1) to a foundry (4). The ultrasonic emitting device has a plurality of ultrasonic heads (5) mounted in the side walls and the bottom of the transfer channel. The ultrasonic heads (5) are connected to an adjustable ultrasonic generator (6).

Description

PROCEDE DE DEGAZAGE D'UNE MATIERE EN FUSION ET DISPOSITIF DE MISE EN OEUVRE DU PROCEDEMETHOD FOR DEGASING A MOLTEN MATERIAL AND DEVICE FOR IMPLEMENTING THE PROCESS
La présente invention concerne un procédé de déga¬ zage d'une matière en fusion et son dispositif de mise en oeuvre.The present invention relates to a process for the degassing of a molten material and its implementation device.
Lors de la fusion d'une matière, et en particulier d'un métal, il est le plus souvent nécessaire d'éliminer des impuretés. Dans le cas de l'aluminium, par exemple, il est bien connu que l'aluminium en fusion, à la sortie du four, peut contenir des impuretés sous forme de métaux alcalins tels que le sodium et le lithium ainsi que de l'hydrogène et des inclusions étrangères de diverses sortes. La présence de ces impuretés dans l'aluminium revenu à la phase solide sous forme de pièces ou de blocs injectés ou moulés peut créer un manque d'homogénéité de la matière et altérer considérablement ses qualités phy- siques. Afin d'obtenir de la matière présentant les meil¬ leures qualités physiques et une bonne homogénéité, il est indispensable de procéder à un traitement de dégazage dans le but d'éliminer les impuretés.When melting a material, and in particular a metal, it is most often necessary to eliminate impurities. In the case of aluminium, for example, it is well known that molten aluminium, coming out of the furnace, can contain impurities in the form of alkali metals such as sodium and lithium as well as hydrogen. and foreign inclusions of various kinds. The presence of these impurities in aluminum returned to the solid phase in the form of injected or molded parts or blocks can create a lack of homogeneity in the material and considerably alter its physical qualities. In order to obtain material having the best physical qualities and good homogeneity, it is essential to carry out a degassing treatment in order to eliminate the impurities.
Plusieurs procédés de dégazage sont connus, qui ëli- minent totalement ou en partie les impuretés précitées. Ces procédés connus présentent tous plusieurs inconvé¬ nients, par le fait que la réaction chimique de dégazage est obtenue par l'introduction d'éléments chimiques ex¬ térieurs, et que cette réaction chimique de dégazage pro- voque des réactions secondaires qui créent des impuretés secondaires. Il est alors indispensable de procéder à un traitement secondaire dans le but d'éliminer les impu¬ retés secondaires. Un autre inconvénient de ces procédés connus consiste dans le fait que les réactions chimiques obtenues, dégagent des fumées nocives qu'il est indispen¬ sable de traiter avant l'évacuation à l'air libre.Several degassing processes are known, which totally or partially eliminate the aforementioned impurities. These known processes all have several disadvantages, in that the chemical degassing reaction is obtained by the introduction of external chemical elements, and that this chemical degassing reaction causes secondary reactions which create impurities secondary. It is then essential to carry out a secondary treatment in order to eliminate the secondary impurities. Another disadvantage of these known methods consists in the fact that the chemical reactions obtained give off harmful fumes which it is essential to treat before evacuation in the open air.
De plus, les procédés connus nécessitent un équipe- ment volumineux et sont assez coûteux, et leur consomma¬ tion d'énergie est très élevée.In addition, the known methods require a team- ment bulky and are quite expensive, and their consumption of energy is very high.
La présente invention a pour but de remédier à ces inconvénients. A cet effet, l'invention, telle qu'elle est caractérisée dans les revendications, concerne un procédé de dégazage d'une matière en fusion au cours du¬ quel on soumet la matière en fusion à des émissions ultra- soniques. L'invention concerne également un dispositif de mise en oeuvre de ce procédé, comportant un dispositif émettant des ultra-sons monté solidaire d'un canal de transfert de la matière en fusion reliant un four à une fonderie.The object of the present invention is to remedy these drawbacks. To this end, the invention, as characterized in the claims, relates to a process for degassing a molten material during which the molten material is subjected to ultrasonic emissions. The invention also relates to a device for implementing this process, comprising a device emitting ultrasound mounted integral with a transfer channel for the molten material connecting a furnace to a foundry.
L'avantage principal du procédé de l'invention con¬ siste en ce que le dégazage par ultra-sons élimine complè- te ent les impuretés sans provoquer de réactions secon¬ daires et sans dégager de fumées nocives. Par conséquent, le procédé de l'invention permet de supprimer tout l'équi¬ pement supplémentaire qui est normalement nécessaire pour le traitement de ces réactions secondaires. Le coût de l'installation est donc fortement réduit et l'équipement peu volumineux. La consommation d'énergie est également fortement réduite.The main advantage of the process of the invention consists in that the degassing by ultrasound completely eliminates the impurities without causing secondary reactions and without giving off harmful fumes. Consequently, the process of the invention makes it possible to eliminate all the additional equipment which is normally necessary for the treatment of these side reactions. The cost of the installation is therefore greatly reduced and the equipment not bulky. Power consumption is also greatly reduced.
Un autre avantage important du procédé selon l'inven¬ tion réside dans le fait que l'émission d'ultra-sons sur la matière en fusion modifie le grain de la matière et réduit fortement les inclusions résiduelles, ce qui faci¬ lite la coulée et les opérations de filtrage. Cette modi¬ fication de grain permet d'obtenir une matière plus homo¬ gène et qui présente des qualités physiques supérieures. Le procédé de dégazage selon l'invention est utili¬ sable, en particulier, pour le dégazage des métaux non ferreux en fusion et de l'aluminium ou de ses dérivés en fusion.Another important advantage of the process according to the invention lies in the fact that the emission of ultrasound on the molten material modifies the grain of the material and greatly reduces the residual inclusions, which facilitates casting. and filtering operations. This modification of the grain makes it possible to obtain a material which is more homogeneous and which has superior physical qualities. The degassing process according to the invention is useful, in particular, for degassing molten non-ferrous metals and molten aluminum or its derivatives.
Selon un mode d'exécution préférentiel, le disposi- tif de mise en oeuvre du procédé de l'invention comporte des têtes ultra-soniques qui sont montées dans les parois et le fond d'un canal de transfert, lequel canal de trans¬ fert est destiné à l'écoulement de matière en fusion, par exemple de l'aluminium en fusion, entre un four et un équipement de fonderie. Le canal de transfert peut éga- lement être connecté sur un canal de recirculation qui retourne la matière en fusion jusqu'au four, dans le cas où la fonderie n'est pas en action. Les têtes ultra-so¬ niques peuvent être reliées à un générateur d'ultra-sons réglable, ce qui permet de varier les émissions d'ultra- sons selon les besoins.According to a preferred embodiment, the device for implementing the method of the invention comprises ultrasonic heads which are mounted in the walls and the bottom of a transfer channel, which transfer channel is intended for the flow of molten material, for example molten aluminum, between a furnace and foundry equipment. The transfer channel can also be connected to a recirculation channel which returns the molten material to the furnace, in the event that the foundry is not in action. The ultrasonic heads can be connected to an adjustable ultrasonic generator, which makes it possible to vary the ultrasonic emissions according to need.
On comprendra mieux l'invention à l'aide de la des¬ cription qui suit, donnée à titre d'exemple, et qui ren¬ voie aux dessins sur lesquels : la figure 1 est une vue schématique de côté d'un dispositif de mise en oeuvre du procédé; la figure 2 est une vue schématique de dessus du dispositif de la figure 1; la figure 3 montre, en coupe, les têtes ultra-so¬ niques montées dans le canal de transfert; et la figure 4 montre une vue de côté du canal de trans¬ fert équipé avec les têtes ultra-soniques.The invention will be better understood with the aid of the description which follows, given by way of example, and which refers to the drawings in which: FIG. 1 is a schematic side view of a carrying out the method; Figure 2 is a schematic top view of the device of Figure 1; FIG. 3 shows, in section, the ultra-sonic heads mounted in the transfer channel; and FIG. 4 shows a side view of the transfer channel equipped with the ultra-sonic heads.
Les figures 1 et 2 représentent schématiquement une installation pour la fusion de l'aluminium utilisant le procédé de l'invention. Cette installation comprend un canal de transfert 2 qui relie un four 1 à un équipement de fonderie 4. La matière en fusion 3 coule dans le canal de transfert 2 depuis le four 1 jusqu'à la fonderie 4. Le dispositif d'émission d'ultra-sons comporte une plura¬ lité de têtes ultra-soniques 5 montées dans les parois 2' et le fond 2'' du canal de transfert 21 Les têtes ultra-soniques 5 sont reliées par l'intermédiaire de câbles de connexion 7 à un générateur d'ultra-sons ré¬ glable. La figure 2 montre en outre un canal de recircu¬ lation 8 qui permet le retour de la matière en fusion 3 jusque dans le four 1 lorsque l'équipement de fonderie 4 n'est pas en utilisation.Figures 1 and 2 schematically represent an installation for melting aluminum using the method of the invention. This installation comprises a transfer channel 2 which connects a furnace 1 to a foundry equipment 4. The molten material 3 flows in the transfer channel 2 from the furnace 1 to the foundry 4. The emission device ultrasound comprises a plurality of ultrasound heads 5 mounted in the walls 2' and the bottom 2'' of the transfer channel 21 The ultrasound heads 5 are connected via connection cables 7 to a adjustable ultrasonic generator. Figure 2 also shows a recircu¬ tion channel 8 which allows the return of the molten material 3 into the furnace 1 when the foundry equipment 4 is not in use.
/ Comme le montrent les figures 3 et 4, les têtes ultra-soniques 5 sont montées fixement dans les parois latérales 2' et le fond 2' ' du canal de transfert 2./ As shown in Figures 3 and 4, the ultrasonic heads 5 are fixedly mounted in the side walls 2' and the bottom 2'' of the transfer channel 2.
Le principe de l'invention est basé sur l'émission d'ultra-sons agissant sur la matière en fusion. Le nombre de têtes ultra-soniques et le positionnement de ces têtes dans le plan vertical, longitudinal et transversal, dans les parois du canal de transfert, ne sont pas déterminants pour le bon fonctionnement du procédé. On choisira toute- fois le nombre et positionnement des têtes ultra-soniques en fonction des dimensions des canaux de transfert et des paramètres de coulées. The principle of the invention is based on the emission of ultrasound acting on the molten material. The number of ultrasonic heads and the positioning of these heads in the vertical, longitudinal and transverse plane, in the walls of the transfer channel, are not decisive for the correct operation of the method. However, the number and positioning of the ultrasonic heads will be chosen according to the dimensions of the transfer channels and the casting parameters.

Claims

REVENDICATIONS
1. Procédé-de dégazage d'une matière en fusion, caracté¬ risé en ce que l'on soumet la matière en fusion à des émissions ultra-soniques.1. Process for degassing a molten material, characterized in that the molten material is subjected to ultrasonic emissions.
2. Procédé selon la revendication 1, pour le dégazage de l'aluminium en fusion ou de ses dérivés.2. Method according to claim 1, for the degassing of molten aluminum or its derivatives.
3. Procédé selon la revendication 1, pour le dégazage de métaux non ferreux en fusion.3. Method according to claim 1, for the degassing of molten non-ferrous metals.
4. Dispositif pour la mise en oeuvre du procédé de dé¬ gazage d'une matière en fusion selon l'une des revendi- cations 1, 2 ou 3, caractérisé en ce qu'il comporte au moins un dispositif (5) émettant des ultra-sons et mon¬ té solidaire d'un canal de transfert (2) de la matière en fusion (3) reliant un four (1) à une fonderie (4) .4. Device for implementing the process for degassing a molten material according to one of claims 1, 2 or 3, characterized in that it comprises at least one device (5) emitting ultrasound and mon¬ tee integral with a transfer channel (2) of the molten material (3) connecting a furnace (1) to a foundry (4).
5. Dispositif selon la revendication 4, caractérisé en ce que le dispositif d'émission d'ultra-sons comporte une pluralité de têtes ultra-soniques (5) montées dans les parois (2') et/ou le fond (2'') du canal de transfert (2).5. Device according to claim 4, characterized in that the ultrasonic emitting device comprises a plurality of ultrasonic heads (5) mounted in the walls (2 ') and / or the bottom (2 '' ) of the transfer channel (2).
6. Dispositif selon la revendication 5, caractérisé en ce que les têtes ultra-soniques (5) sont reliées par des moyens de connexion (7) à un générateur d'ultra-sons (6) réglable.6. Device according to claim 5, characterized in that the ultrasonic heads (5) are connected by connection means (7) to an adjustable ultrasonic generator (6).
7. Dispositif selon l'une des revendications 4 à 6, ca¬ ractérisé en ce qu'il comporte un canal de recirculation reliant le canal de transfert (2) au four (1) . 7. Device according to one of claims 4 to 6, ca¬ acterized in that it comprises a recirculation channel connecting the transfer channel (2) to the furnace (1).
EP86902781A 1985-05-13 1986-05-13 Method for degasing a melting material and device for implementins such method Withdrawn EP0224499A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2017/85 1985-05-13
CH201785 1985-05-13

Publications (1)

Publication Number Publication Date
EP0224499A1 true EP0224499A1 (en) 1987-06-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86902781A Withdrawn EP0224499A1 (en) 1985-05-13 1986-05-13 Method for degasing a melting material and device for implementins such method

Country Status (2)

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EP (1) EP0224499A1 (en)
WO (1) WO1986006749A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018207196A1 (en) 2017-05-12 2018-11-15 Shah Chirag Satish An automated device for degassing and/or foaming of metals and their alloys and process thereof

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EP0634961A1 (en) * 1992-04-06 1995-01-25 MOUNTFORD, Norman Duncan Gerard Ultrasonic treatment of liquids in particular metal melts
US5660614A (en) * 1994-02-04 1997-08-26 Alcan International Limited Gas treatment of molten metals
US5527381A (en) * 1994-02-04 1996-06-18 Alcan International Limited Gas treatment of molten metals
US6056803A (en) * 1997-12-24 2000-05-02 Alcan International Limited Injector for gas treatment of molten metals
CN103056318B (en) 2008-03-05 2017-06-09 南线有限责任公司 As the niobium of the protective wall in motlten metal
US8652397B2 (en) 2010-04-09 2014-02-18 Southwire Company Ultrasonic device with integrated gas delivery system
DK2556176T3 (en) 2010-04-09 2020-05-04 Southwire Co Llc Ultrasonic degassing of molten metals
US9145597B2 (en) 2013-02-22 2015-09-29 Almex Usa Inc. Simultaneous multi-mode gas activation degassing device for casting ultraclean high-purity metals and alloys
CN103894570B (en) * 2013-10-31 2016-06-15 中南大学 A kind of dynamically execute method of slight for aluminium alloy ultrasonic cleaning degasification
BR112016011262B1 (en) 2013-11-18 2021-05-18 Southwire Company, Llc ultrasonic device and method for reducing an amount of a dissolved gas and/or an impurity in a molten metal bath
US10233515B1 (en) 2015-08-14 2019-03-19 Southwire Company, Llc Metal treatment station for use with ultrasonic degassing system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018207196A1 (en) 2017-05-12 2018-11-15 Shah Chirag Satish An automated device for degassing and/or foaming of metals and their alloys and process thereof

Also Published As

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