EP0073729B1 - Dispositif rotatif de dispersion de gaz pour le traitement d'un bain de métal liquide - Google Patents

Dispositif rotatif de dispersion de gaz pour le traitement d'un bain de métal liquide Download PDF

Info

Publication number
EP0073729B1
EP0073729B1 EP82420123A EP82420123A EP0073729B1 EP 0073729 B1 EP0073729 B1 EP 0073729B1 EP 82420123 A EP82420123 A EP 82420123A EP 82420123 A EP82420123 A EP 82420123A EP 0073729 B1 EP0073729 B1 EP 0073729B1
Authority
EP
European Patent Office
Prior art keywords
gas
bath
liquid
metal
rotor
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
Application number
EP82420123A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0073729A1 (fr
Inventor
Jacques Gimond
Richard Gonda
Jean-Marie Hicter
Pierre Laty
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.)
Rio Tinto France SAS
Original Assignee
Aluminium Pechiney SA
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 Aluminium Pechiney SA filed Critical Aluminium Pechiney SA
Priority to AT82420123T priority Critical patent/ATE12311T1/de
Publication of EP0073729A1 publication Critical patent/EP0073729A1/fr
Application granted granted Critical
Publication of EP0073729B1 publication Critical patent/EP0073729B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • 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
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • C22B9/055—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ while the metal is circulating, e.g. combined with filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23314—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2335—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer
    • B01F23/23352—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer the gas moving perpendicular to the axis of rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
    • 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
    • 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
    • F27D27/00—Stirring devices for molten material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/115—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis

Definitions

  • the present invention relates to a rotary gas dispersion device for the treatment of a bath of liquid metal and, in particular, of aluminum and its alloys.
  • the first consists in passing the liquid metal through inert or active filtration media which retain the impurities either mechanically, chemically or by exerting the two effects;
  • the second way resorts to the use of inert or reactive gases or their mixtures, which are more or less intensely stirred with the liquid metal, in the presence or not of products such as fluxes.
  • gases are injected in the form of small discrete bubbles by means of a device consisting of a rotary shaft secured to a finned rotor, of a fixed sleeve surrounding said shaft and connected to its end. lower than a finned stator: shaft and sleeve are separated by an axial passage in which the gases are transported, then introduced at the level of the fins where they are subdivided into small bubbles and brought into contact with the metal stirred by the rotor.
  • each gas bubble emitted can be small at the time of its formation, and give rise initially and locally to the formation of a fine dispersion, on the other hand, during its progress in the bath, it grows rapidly by coalescence with other bubbles and then forms a coarse dispersion.
  • the liquid-gas exchange is considerably reduced for the parts of the bath which have not been in contact with the gas at its point of emission, hence the random effectiveness of the treatment.
  • it is necessary to find a system in which each of the elementary volumes of the liquid constituting the whole of the bath to be treated can form with the gas this desired fine dispersion in order to obtain optimum efficiency.
  • This rotary gas dispersing device for the treatment of a bath of liquid metal contained in a container comprises a cylinder-shaped rotor equipped with vanes plunging into the bath, connected to a hollow drive shaft serving to supply gas , and is characterized in that the rotor is pierced with pairs of channels, each pair comprising a channel which is used for the passage of the liquid and the other for the passage of the gas, each of these couples opening separately at the same point on the lateral surface of the cylinder so that a fine dispersion of liquid-gas is formed there, which is then distributed in the bath by means of the paddles.
  • the device according to the invention therefore comprises known elements, namely a cylinder-shaped rotor equipped on its side wall with pallets having any contour, placed symmetrically with respect to the axis of rotation and arranged either vertically or obliquely so as to form an upward or downward helix.
  • This rotor is connected, in its center, and in the direction of its axis, to the lower part of a drive shaft whose upper end is connected, via a speed reducer, with a motor which gives it a rotational movement.
  • This shaft is hollow, so as to bring to the level of the rotor a gas admitted at its upper end by means, for example, of a pipe provided with a rotating joint.
  • this shaft is composed of two different materials: one, for the part which plunges into the bath and which is generally graphite, the other, for the emerging part and which can be a corrosion-resistant metal alloy when the treatment gas contains chlorine for example.
  • This part of the tree can be provided with cooling fins to avoid any excessive rise in temperature, which would adversely affect the team's behavior. ment relating to the gas supply, and to the drive mechanism.
  • the particularity of the device resides in the presence, inside the rotor, most often made of graphite, of pairs of gas circulation channels and metal circulation channels pierced in the mass and arranged in an original manner.
  • liquid metal circulation channels As for the liquid metal circulation channels, they have an oblique direction relative to the axis of the rotor and pass right through it, originating either on its lower face or on its upper face, and emerging on the face side, at the precise place where the gas circulation pipes open. This direction is generally inclined between 10 and 60 ° relative to the horizontal. Their section, generally circular, is greater than that of the gas channels, and also varies according to the flow rate of metal which it is desired to treat, but a diameter of between 0.5 and 1.5 cm is perfectly suitable.
  • each gas channel is associated a liquid channel, from where a set of pairs of channels having a common point of emergence in the bath.
  • the liquid metal moves in the channels which are intended for it. This movement takes place from bottom to top or from top to bottom depending on whether the liquid channels originate on the lower or upper face of the rotor.
  • the flow rate obtained is a function of the speed of rotation of the rotor, the number of channels, their section, their inclination relative to the vertical, the difference in level between their ends and the distance between where they take birth and the center of the rotor.
  • the mixture thus produced appearing on the lateral surface of the rotor is distributed immediately by means of paddles throughout the bath where the exchange reactions continue, and before coalescence occurs, the enlargement of the gas bubbles and their bursting at the surface of the bath.
  • the liquid flow rate Due to the numerous parameters which influence the liquid flow rate, it is always possible to adjust these to certain values so as to obtain a complete treatment of all the flow rate of the metal to be treated. Likewise, the gas flow rate can be adjusted to values commonly accepted for the treatment of a given quantity of metal. Thanks to these possibilities of adjusting the geometric parameters indicated above, it is possible to limit oneself to low rotational speeds, which has the advantage of simplifying the technology of the drive mechanism and thus improving the resistance in the material time.
  • Such a device according to the invention can be placed in any container whose content is to be treated, whether it is a ladle, a holding or processing furnace operating continuously or not, whether or not it is equipped with intermediate partitions, whether or not it involves fluxes, whether the gases used are nitrogen, argon, chlorine, or their mixtures, or vapors of halogenated derivatives, or any other gaseous product capable of '' have a favorable action on the purification of the metal.
  • the flow to be treated the desired duration of the treatment
  • several devices can be used, whether they are placed on a single or on several containers placed in series or in parallel.
  • Fig. 1 shows a vertical section of the device along a plane passing through the axis of rotation and the axes of two pairs of channels.
  • Fig. 2 shows, seen from below, a horizontal section along the line X'X of FIG. 1, of the device.
  • Fig. 3 shows, in vertical section, the device installed on a continuous casting ladle.
  • FIG. 3 is a ladle 9 closed by a cover 10, divided into an upstream compartment 11 and a downstream compartment 12 by a partition 13 supplied with liquid by the inlet spout 14 and drained by the outlet spout 15.
  • the liquid is subjected to the action of the device according to the invention, on which we can distinguish the rotor 3 provided with its channels 5 and 7 opening into the bath at 6 and pallets 8, connected via the chamber 4 to the hollow shaft composed of a graphite part 1, sleeved at its upper part on a metal shaft 16 equipped with cooling fins 17 driven by a controlled reducer 18 by a motor 19 and connected to a pipe 20 by means of a rotary joint 21 so as to be able to admit gas 2 coming from an external source.
  • the rotor 3 provided with its channels 5 and 7 opening into the bath at 6 and pallets 8
  • the hollow shaft composed of a graphite part 1, sleeved at its upper part on a metal shaft 16 equipped with cooling fins 17 driven by a controlled reducer 18 by a motor 19 and connected to a pipe 20 by means of a rotary joint 21 so as to be able to admit gas 2 coming from an external source.
  • the liquid enters the channels 7 in the directions 22, rises to 6 where it meets the gases admitted into the chamber 4 in the directions 23 which escape through the channels 5 to form a fine dispersion which is distributed in the bath by the paddles 8 in the direction 24.
  • the present invention is illustrated by the following application example: a pocket 60 cm in diameter and 1 m high has been fitted with a graphite rotor having a diameter of 20 cm and a height of 8 cm.
  • the rotor is provided with eight channels for the passage of metal with a diameter of 1 cm, with a length of 7 cm, inclined with respect to the vertical of 45 ° and with eight channels for the passage of gas, drilled horizontally, and with a diameter of 0.1 cm.
  • the alloy was very gaseous, and presented to the vacuum test under a pressure of 2 Torr, a hydrogen content of 0.85 cm 3 / 100g; at the output, by subjecting this alloy to the same test, it is more noted that a content of 0.14 cm 3/100 g and no occurrence of bubbles,. which shows the effectiveness of the treatment obtained using the claimed device.
  • the present invention finds its application whenever a good dispersion in two-phase liquid-gas mixtures is sought: this is the case in the treatment of liquid metals and, in particular, aluminum or its alloys with a view to '' remove hydrogen and non-metallic impurities.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treating Waste Gases (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Coating Apparatus (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Radiation-Therapy Devices (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Chemically Coating (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP82420123A 1981-08-28 1982-08-25 Dispositif rotatif de dispersion de gaz pour le traitement d'un bain de métal liquide Expired EP0073729B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82420123T ATE12311T1 (de) 1981-08-28 1982-08-25 Ruehrer zum einruehren von gas bei der behandlung metallener baeder.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8116735 1981-08-28
FR8116735A FR2512067B1 (fr) 1981-08-28 1981-08-28 Dispositif rotatif de dispersion de gaz pour le traitement d'un bain de metal liquide

Publications (2)

Publication Number Publication Date
EP0073729A1 EP0073729A1 (fr) 1983-03-09
EP0073729B1 true EP0073729B1 (fr) 1985-03-20

Family

ID=9261862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82420123A Expired EP0073729B1 (fr) 1981-08-28 1982-08-25 Dispositif rotatif de dispersion de gaz pour le traitement d'un bain de métal liquide

Country Status (28)

Country Link
US (1) US4426068A (enrdf_load_stackoverflow)
EP (1) EP0073729B1 (enrdf_load_stackoverflow)
JP (1) JPS6049700B2 (enrdf_load_stackoverflow)
KR (1) KR870000508B1 (enrdf_load_stackoverflow)
AT (1) ATE12311T1 (enrdf_load_stackoverflow)
AU (1) AU546831B2 (enrdf_load_stackoverflow)
BG (1) BG41825A3 (enrdf_load_stackoverflow)
BR (1) BR8205026A (enrdf_load_stackoverflow)
CA (1) CA1184381A (enrdf_load_stackoverflow)
CS (1) CS229943B2 (enrdf_load_stackoverflow)
DD (1) DD202453A5 (enrdf_load_stackoverflow)
DE (1) DE3262681D1 (enrdf_load_stackoverflow)
DK (1) DK158325C (enrdf_load_stackoverflow)
EG (1) EG15395A (enrdf_load_stackoverflow)
ES (1) ES515297A0 (enrdf_load_stackoverflow)
FR (1) FR2512067B1 (enrdf_load_stackoverflow)
GR (1) GR77611B (enrdf_load_stackoverflow)
HK (1) HK27686A (enrdf_load_stackoverflow)
HU (1) HU186110B (enrdf_load_stackoverflow)
IE (1) IE53805B1 (enrdf_load_stackoverflow)
IN (1) IN156351B (enrdf_load_stackoverflow)
NO (1) NO160527C (enrdf_load_stackoverflow)
PL (1) PL131793B1 (enrdf_load_stackoverflow)
RO (1) RO85137B (enrdf_load_stackoverflow)
SU (1) SU1233807A3 (enrdf_load_stackoverflow)
TR (1) TR21856A (enrdf_load_stackoverflow)
YU (1) YU42045B (enrdf_load_stackoverflow)
ZA (1) ZA826254B (enrdf_load_stackoverflow)

Families Citing this family (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO155447C (no) * 1984-01-25 1987-04-01 Ardal Og Sunndal Verk Anordning ved anlegg for behandling av en vaeske, f.eks. en aluminiumssmelte.
FR2562449B1 (fr) * 1984-04-06 1986-11-14 Servimetal Dispositif de traitement de l'acier, avant coulee continue, par injection de gaz
FR2568267B1 (fr) * 1984-07-27 1987-01-23 Pechiney Aluminium Poche de chloruration d'alliages d'aluminium destinee a eliminer le magnesium
DE3564449D1 (en) * 1984-11-29 1988-09-22 Foseco Int Rotary device, apparatus and method for treating molten metal
JPS62205235A (ja) * 1986-03-05 1987-09-09 Showa Alum Corp 溶融金属の処理装置
FR2604099B1 (fr) * 1986-09-22 1989-09-15 Pechiney Aluminium Dispositif rotatif a pels de mise en solution d'elements d'alliage et de dispersion de gaz dans un bain d'aluminium
JPH01271059A (ja) * 1988-04-21 1989-10-30 Honda Kinzoku Gijutsu Kk 金属連続溶解保持炉
CA1305609C (en) * 1988-06-14 1992-07-28 Peter D. Waite Treatment of molten light metals
US4954167A (en) * 1988-07-22 1990-09-04 Cooper Paul V Dispersing gas into molten metal
DE3827659A1 (de) * 1988-08-16 1990-03-15 Gabor Klaus Dieter Dipl Ing Verfahren zur physikalischen aufbereitung von medien - fluessiger bis duennbreiiger konsistenz - zur veraenderung physikalischer grundeigenschaften und aufbereitungsgeraet zur durchfuehrung des verfahrens
US5013490A (en) * 1988-10-21 1991-05-07 Showa Aluminum Corporation Device for releasing and diffusing bubbles into liquid
FR2645456B1 (fr) * 1989-04-11 1994-02-11 Air Liquide Procede et installation de traitement d'un liquide avec un gaz
FR2656001A1 (fr) * 1989-12-18 1991-06-21 Pechiney Recherche Procede et dispositif d'elaboration de produits composites a matrice metallique.
GB2294209B (en) * 1991-09-26 1996-07-03 Charles Edward Eckert Method for treating a molten metal with a gas
US5160693A (en) * 1991-09-26 1992-11-03 Eckert Charles E Impeller for treating molten metals
JPH07122106B2 (ja) * 1991-12-02 1995-12-25 福岡アルミ工業株式会社 溶融軽金属の精製処理方法及び軽金属鋳塊または鋳物の製造方法
CA2097648C (en) * 1992-06-12 1998-04-28 Ronald E. Gilbert Molton metal pump with vaned impeller and flow directing pumping chamber
US5634770A (en) * 1992-06-12 1997-06-03 Metaullics Systems Co., L.P. Molten metal pump with vaned impeller
FR2702159B1 (fr) * 1993-03-05 1995-04-28 Raymond Berchotteau Appareil pour introduire et diffuser de l'air ou un gaz dans un liquide.
NO950173L (no) * 1994-01-27 1995-07-28 Praxair Technology Inc Slagresistent oksydasjonsbeskyttelse for grafittdeler
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
US5597289A (en) * 1995-03-07 1997-01-28 Thut; Bruno H. Dynamically balanced pump impeller
US5660766A (en) * 1995-09-22 1997-08-26 Van Dyek; Bernhard Aerator
DE19539621C1 (de) * 1995-10-16 1997-06-05 Bayer Ag Begasungsrührer für Leichtmetallschmelzen
WO1998005915A1 (fr) * 1996-08-02 1998-02-12 Pechiney Rhenalu Dispositif rotatif de dispersion de gaz pour le traitement d'un bain d'aluminium liquide
US6254340B1 (en) * 1997-04-23 2001-07-03 Metaullics Systems Co., L.P. Molten metal impeller
FR2763079B1 (fr) * 1997-05-07 1999-07-30 Graphitech Rotor et installation pour le traitement d'un bain de metal liquide
US6019576A (en) * 1997-09-22 2000-02-01 Thut; Bruno H. Pumps for pumping molten metal with a stirring action
US6056803A (en) * 1997-12-24 2000-05-02 Alcan International Limited Injector for gas treatment of molten metals
US6109449A (en) * 1998-11-04 2000-08-29 General Signal Corporation Mixing system for separation of materials by flotation
US6199836B1 (en) * 1998-11-24 2001-03-13 Blasch Precision Ceramics, Inc. Monolithic ceramic gas diffuser for injecting gas into a molten metal bath
US6457940B1 (en) 1999-07-23 2002-10-01 Dale T. Lehman Molten metal pump
CA2717264C (en) * 2000-02-01 2014-04-29 Pyrotek, Inc. Pump for molten materials with suspended solids
GB2365513A (en) * 2000-08-04 2002-02-20 Pyrotek Engineering Materials Refractory components for use in metal producing processes
US6524066B2 (en) * 2001-01-31 2003-02-25 Bruno H. Thut Impeller for molten metal pump with reduced clogging
CN100409931C (zh) * 2003-11-11 2008-08-13 福州华镁新技术开发有限公司 镁合金液搅拌精炼器
BRMU8402794U8 (pt) * 2004-08-27 2021-10-26 Magnesita Insider Refratarios Ltda Configuração aplicada a dispositivo para injeção de gás e/ou gás e pós em metais líquidos através de lança refratária rotativa
US7476357B2 (en) * 2004-12-02 2009-01-13 Thut Bruno H Gas mixing and dispersement in pumps for pumping molten metal
US7497988B2 (en) * 2005-01-27 2009-03-03 Thut Bruno H Vortexer apparatus
US7507365B2 (en) * 2005-03-07 2009-03-24 Thut Bruno H Multi functional pump for pumping molten metal
US7534284B2 (en) * 2007-03-27 2009-05-19 Bruno Thut Flux injection with pump for pumping molten metal
KR101036321B1 (ko) * 2008-12-26 2011-05-23 주식회사 포스코 페로망간 탈린 장치 및 탈린 방법
US9259780B2 (en) 2013-03-15 2016-02-16 Esm Group Inc. Rotational lance drive and rotational lance injection method
JP6317604B2 (ja) * 2014-03-20 2018-04-25 東京窯業株式会社 気泡の放出分散装置
CA2928650C (en) 2015-05-01 2023-09-26 Opta Minerals Inc. Lance drive system
WO2017098446A1 (en) * 2015-12-09 2017-06-15 Tenova South Africa (Pty) Ltd Method of operating a top submerged lance furnace
CN109351141A (zh) * 2018-10-25 2019-02-19 南京安伦化工科技有限公司 一种旋转式废气净化处理装置
CN111102850B (zh) * 2019-12-26 2021-07-30 河北工业职业技术学院 金属冶炼用自动匀料器
PL441774A1 (pl) * 2022-07-19 2024-01-22 Akademia Górniczo-Hutnicza Im.Stanisława Staszica W Krakowie Rotor do urządzenia rafinującego aluminium

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3227547A (en) * 1961-11-24 1966-01-04 Union Carbide Corp Degassing molten metals
SE307627B (enrdf_load_stackoverflow) * 1967-02-09 1969-01-13 J Oestberg
DE1758186A1 (de) * 1968-04-19 1971-01-14 Dr Heinrich Willter Verfahren und Vorrichtung zur Herstellung dispersionsgeharteter Legierungen aus der Schmelze
US3743263A (en) * 1971-12-27 1973-07-03 Union Carbide Corp Apparatus for refining molten aluminum
LU64926A1 (enrdf_load_stackoverflow) * 1972-03-08 1973-09-12
GB1428146A (en) * 1972-09-18 1976-03-17 Aluminum Co Of America Purification of aluminium
CH583781A5 (enrdf_load_stackoverflow) * 1972-12-07 1977-01-14 Feichtinger Heinrich Sen
US4178175A (en) 1973-06-08 1979-12-11 Kobe Steel, Ltd. Method for agitating a bath of melted metal for treating the same
DE2329807C2 (de) * 1973-06-12 1975-05-15 Kobe Steel, Ltd., Kobe (Japan) Verfahren zur Bewegung einer Metallschmelze und Vorrichtung dazu
DE7622931U1 (de) * 1976-07-21 1976-12-02 Oestberg, Jan-Erik, Bettna (Schweden) Rotierender ruehrer fuer metallurgische zwecke
US4040610A (en) 1976-08-16 1977-08-09 Union Carbide Corporation Apparatus for refining molten metal
DE2728173A1 (de) * 1977-06-23 1979-01-04 Rudolf Koppatz Ruehrwerk fuer metallschmelzen

Also Published As

Publication number Publication date
AU546831B2 (en) 1985-09-19
DE3262681D1 (en) 1985-04-25
EG15395A (en) 1989-01-30
DK384082A (da) 1983-03-01
JPS5842734A (ja) 1983-03-12
NO160527C (no) 1989-04-26
DK158325C (da) 1990-10-01
FR2512067B1 (fr) 1986-02-07
TR21856A (tr) 1985-10-01
KR870000508B1 (ko) 1987-03-13
FR2512067A1 (fr) 1983-03-04
BR8205026A (pt) 1983-08-09
IN156351B (enrdf_load_stackoverflow) 1985-06-29
PL131793B1 (en) 1985-01-31
IE822077L (en) 1983-02-28
NO822913L (no) 1983-03-01
IE53805B1 (en) 1989-03-01
NO160527B (no) 1989-01-16
YU192982A (en) 1985-03-20
DD202453A5 (de) 1983-09-14
SU1233807A3 (ru) 1986-05-23
RO85137A (ro) 1984-11-25
US4426068A (en) 1984-01-17
ES8307914A1 (es) 1983-07-01
YU42045B (en) 1988-04-30
ES515297A0 (es) 1983-07-01
CA1184381A (fr) 1985-03-26
KR840000920A (ko) 1984-03-26
HU186110B (en) 1985-06-28
HK27686A (en) 1986-04-25
AU8779382A (en) 1983-03-03
BG41825A3 (en) 1987-08-14
RO85137B (ro) 1984-11-30
PL238022A1 (en) 1983-04-11
DK158325B (da) 1990-04-30
ATE12311T1 (de) 1985-04-15
EP0073729A1 (fr) 1983-03-09
JPS6049700B2 (ja) 1985-11-05
ZA826254B (en) 1983-10-26
CS229943B2 (en) 1984-07-16
GR77611B (enrdf_load_stackoverflow) 1984-09-25

Similar Documents

Publication Publication Date Title
EP0073729B1 (fr) Dispositif rotatif de dispersion de gaz pour le traitement d'un bain de métal liquide
EP0050578B1 (fr) Dispositif de traitement d'un bain de métal liquide par injection de gaz
EP0262058B1 (fr) Dispositif rotatif à pales de mise en solution d'éléments d'alliage et de dispersion de gaz dans un bain d'aluminium
CA2148039C (fr) Procede et installation de traitement d'un ecoulement brut par decantation simple apres lestage au sable fin
EP0170600B1 (fr) Poche de chloruration d'alliages d'aluminium destinée à éliminer le magnésium
BE1004913A3 (fr) Appareil distributeur de poudre et procede associe.
WO1998030319A1 (fr) Dispositif de brassage et d'aeration d'un liquide et d'elimination de la mousse dans une cuve de traitement de ce liquide
WO1998005915A1 (fr) Dispositif rotatif de dispersion de gaz pour le traitement d'un bain d'aluminium liquide
EP0187609B1 (fr) Dispositif d'alimentation rotative en fonte liquide d'une installation de coulée continue verticale d'un tuyau en fonte à graphite sphéroîdal
CA2023753C (fr) Dispositif de traitement au moyen de gaz d'un bain liquide d'al de grande surface maintenu a l'etat stationnaire dans un four
US4240618A (en) Stirrer for metallurgical melts
CH621365A5 (en) Process for refining magnesium, copper, zinc, tin and lead
FR2475929A1 (fr) Element d'installation diffuseur-melangeur, et procede pour realiser et intensifier les processus de transfert de chaleur et/ou de matiere entre des phases liquide-liquide ainsi qu'entre des phases liquide-solide
CA2106961A1 (fr) Dispositif et procede de traitement par voie biologique de fluides a depolluer
EP0280689A1 (en) A method and a device for introducing a gas into a liquid
WO1996016193A1 (fr) Dispositif de degazage et de separation des inclusions dans un bain de metal liquide
FR2588571A1 (fr) Dispositif et procede d'injection continue sous faible pression d'un additif pulverulent dans un courant de metal fondu
FR2598092A1 (fr) Melangeur-decanteur tubulaire a plusieurs etages, destine a etre mis en oeuvre dans l'extraction liquide-liquide a contre-courant
CH382130A (fr) Procédé et appareil pour la fabrication continue de nitrocellulose
BE696950A (enrdf_load_stackoverflow)
BE492509A (enrdf_load_stackoverflow)
FR2529230A1 (fr) Procede et appareillage de degazage de bains de fusion metalliques et/ou d'enlevement d'impuretes non metalliques de ces bains
BE422878A (enrdf_load_stackoverflow)
BE481250A (enrdf_load_stackoverflow)
BE553659A (enrdf_load_stackoverflow)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19830318

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALUMINIUM PECHINEY

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 12311

Country of ref document: AT

Date of ref document: 19850415

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3262681

Country of ref document: DE

Date of ref document: 19850425

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19850831

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19890724

Year of fee payment: 8

ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 82420123.0

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010716

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010724

Year of fee payment: 20

Ref country code: AT

Payment date: 20010724

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20010726

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20010727

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20010831

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20010904

Year of fee payment: 20

BE20 Be: patent expired

Free format text: 20020825 *ALUMINIUM PECHINEY

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20020824

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20020824

Ref country code: CH

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20020824

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20020825

Ref country code: AT

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20020825

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Effective date: 20020824

EUG Se: european patent has lapsed

Ref document number: 82420123.0

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20020825