EP0376008B1 - Système d'introduction de gaz - Google Patents

Système d'introduction de gaz Download PDF

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Publication number
EP0376008B1
EP0376008B1 EP89122476A EP89122476A EP0376008B1 EP 0376008 B1 EP0376008 B1 EP 0376008B1 EP 89122476 A EP89122476 A EP 89122476A EP 89122476 A EP89122476 A EP 89122476A EP 0376008 B1 EP0376008 B1 EP 0376008B1
Authority
EP
European Patent Office
Prior art keywords
gas
container
nozzle
nozzles
container wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89122476A
Other languages
German (de)
English (en)
Other versions
EP0376008A1 (fr
Inventor
Reinhard Dipl.-Ing. Strigl
Manfred Dr.-Ing. Rossmann
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.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to AT89122476T priority Critical patent/ATE86140T1/de
Publication of EP0376008A1 publication Critical patent/EP0376008A1/fr
Application granted granted Critical
Publication of EP0376008B1 publication Critical patent/EP0376008B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B01F23/238—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using vibrations, electrical or magnetic energy, radiations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/406—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles with gas supply only at the bottom
    • B01F33/4062—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles with gas supply only at the bottom with means for modifying the gas pressure or for supplying gas at different pressures or in different volumes at different parts of the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71755—Feed mechanisms characterised by the means for feeding the components to the mixer using means for feeding components in a pulsating or intermittent manner

Definitions

  • the invention relates to a device for introducing gas into a molten metal, which is located in a container.
  • the present invention is therefore based on the object of designing a device of the type mentioned at the outset in such a way that fine-bubble gas entry is achieved in a simple and economical manner.
  • This object is achieved in that on the container bottom with a pressure line for highly compressed gas in connection with floor nozzles for introducing gas into the molten metal are arranged, which are connected to valves that allow a high-frequency pulsating gas entry.
  • the floor nozzles emit gas pulsating into the molten metal essentially in a vertical direction. As high-frequency gas pulsation as possible ensures that the gas bubbles tear off in small dimensions. A conglomeration of small gas bubbles to large ones is prevented.
  • Platter valves, fast-acting solenoid valves or other fast-opening and closing valves can be used to pulsate the gas. The valves are arranged immediately before the gas enters the floor nozzles.
  • At least one nozzle is preferably additionally arranged such that its outlet opening points in a substantially horizontal direction which includes an angle with the tangent of the container wall which is equal to or greater than 0 ° and less than 90 °.
  • the gas can be blown into the molten metal in such a way that the molten metal is set in rotation about the vertical cylinder or pan axis.
  • the gas bubbles that enter the rotating molten metal experience shear forces that prevent large gas bubbles from forming.
  • the nozzle is expediently arranged that its outlet opening points in a substantially horizontal direction, which includes an angle of approximately 0 ° to approximately 30 ° with the tangent of the container wall.
  • the nozzle is preferably installed on the container wall or in the immediate vicinity of the container wall in the container such that the outlet opening is immersed in the molten metal.
  • the molten metal can be easily rotated by blowing in gas, and on the other hand, there are no disruptive nozzles in the interior of the container to prevent the rotating molten metal.
  • a plurality of nozzles are attached in the container along the container wall in such a way that their outlet openings point essentially in a direction parallel to the tangent of the container wall.
  • the container can be designed, for example, as a pan for post-treating a molten metal. It is expedient to provide the nozzle with a nozzle head made of porous material, on the one hand to ensure a fine-bubble gas input and on the other hand to be armed against high thermal loads caused by the hot molten metal. In order to prevent the outlet openings from becoming blocked, a porous stone with directed porosity is preferably used.
  • the floor nozzles are also preferably provided with nozzle heads made of porous material.
  • a high gas pressure is applied to the nozzle to flush the molten metal.
  • the nozzle is connected to a pressure line for highly compressed gas.
  • the application can be continuous or pulsating.
  • the floor nozzles are also connected to pressure lines for highly compressed gas.
  • the quick-opening and closing valves mentioned are arranged in the pressure lines immediately before the floor nozzles.
  • the gas introduction system according to the invention is particularly suitable for use in so-called ladle metallurgy, that is to say when post-treating metal in the ladle.
  • the gas entry system can also be used to effectively purge steel melts, which due to their particularly high density cannot be adequately treated with conventional gas flushing systems.
  • the gas feed system according to the invention also has the decisive advantage of not having to move mechanically moving parts. This represents a significant advantage over stirring systems, which cannot be used in steel treatment, for example, because of the high density of the molten steel.
  • the figure shows a pan for post-treatment of molten steel.
  • molten steel 2 which is to be treated by purging with nitrogen.
  • Nozzles 4 with nozzle heads 5 made of porous stone are arranged on the pan shell 3.
  • the porous stone has a directed porosity.
  • the nozzles 4 are arranged such that the outlet openings of the nozzle heads 5 are directed essentially parallel to the pan jacket 3.
  • the nozzles 4 are charged with highly compressed nitrogen gas via a pressure line (not shown). The nozzles 4 blow the gas into the molten steel so that it is rotated around the vertical pan axis. Via bottom nozzles 7 installed on the pan bottom 6, nitrogen gas is pulsed into the molten steel from below.
  • the floor nozzles 7 are connected to pressure lines (not shown) for highly compressed nitrogen gas. Immediately in front of the floor nozzles 7, fast-acting solenoid valves are arranged in the pressure lines, which allow a pulsating gas input.
  • the floor nozzles 7 are designed as porous plug stones with directed porosity in order to prevent blockages by the molten steel.
  • the pulsating gas input ensures that the gas bubbles tear off in a small extent when they come into contact with the rotating steel melt and are carried along by the rotating steel melt. A conglomeration of the small gas bubbles to large ones is prevented.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Gas Separation By Absorption (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Treating Waste Gases (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Claims (6)

  1. Dispositif pour l'injection de gaz dans un bain de fusion qui se trouve dans un récipient, caractérisé en ce qu'au fond du récipient (6) sont disposées des tuyères de fond (7) reliées à une conduite sous pression pour du gaz fortement comprimé, pour l'injection de gaz dans le bain de fusion métallique, ces tuyères étant reliées à des valves qui permettent une injection de gaz pulsant à haute fréquence.
  2. Dispositif selon la revendication 1, caractérisé en ce que, pour un mode de réalisation du récipient (1) sous forme de cylindre ou de poche avec un axe sensiblement vertical, au moins une tuyère (4) reliée à une conduite sous pression pour du gaz fortement comprimé est disposée de telle façon que son ouverture de sortie (5) soit orientée dans une direction sensiblement horizontale qui fait, avec la tangente à la paroi (3) du récipient, un angle égal ou supérieur à 0° et inférieur à 90°.
  3. Dispositif selon la revendication 2, caractérisé en ce que l'ouverture de sortie (5) est orientée dans une direction sensiblement horizontale et qui forme, avec la tangente à la paroi (3) du récipient, un angle compris entre environ 0° et environ 30°.
  4. Dispositif selon la revendication 2 ou 3, caractérisé en ce que la tuyère (4) est installée dans le récipient (1) sur la paroi du récipient (3) ou immédiatement au voisinage de cette dernière, de telle façon que l'ouverture de sortie (5) plonge dans le bain de métal en fusion (2).
  5. Dispositif selon l'une des revendications 2 à 4, caractérisé en ce que la tuyère (4) est disposée immédiatement au-dessus du fond (6) du récipient.
  6. Dispositif selon l'une des revendications 2 à 5, caractérisé en ce que la tuyère (4) comporte une tête de tuyère (5) en matériau poreux.
EP89122476A 1988-12-10 1989-12-06 Système d'introduction de gaz Expired - Lifetime EP0376008B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89122476T ATE86140T1 (de) 1988-12-10 1989-12-06 Gaseintragssystem.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3841618 1988-12-10
DE3841618A DE3841618A1 (de) 1988-12-10 1988-12-10 Gaseintragssystem

Publications (2)

Publication Number Publication Date
EP0376008A1 EP0376008A1 (fr) 1990-07-04
EP0376008B1 true EP0376008B1 (fr) 1993-03-03

Family

ID=6368865

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89122476A Expired - Lifetime EP0376008B1 (fr) 1988-12-10 1989-12-06 Système d'introduction de gaz

Country Status (4)

Country Link
EP (1) EP0376008B1 (fr)
AT (1) ATE86140T1 (fr)
DE (2) DE3841618A1 (fr)
ES (1) ES2040444T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101378672B1 (ko) * 2006-10-30 2014-03-26 더 유니버시티 오브 셰필드 에어레이션 및 다른 목적용 거품 생성

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19517444C1 (de) * 1995-05-12 1996-01-18 Strate Maschf Vorrichtung für die Zufuhr von Sauerstoff in Abwasser
DE102005016080B4 (de) * 2005-04-08 2009-10-29 Technocon Gmbh Vorrichtung zum biologischen Reinigen von Abwasser
US10377651B2 (en) 2006-10-30 2019-08-13 Perlemax Ltd Bubble generation for aeration and other purposes
DE102009022208B4 (de) 2009-05-20 2013-03-28 Messer Group Gmbh Verfahren zum Behandeln von Metallschmelzen

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL266357A (fr) * 1900-01-01
DE629722C (de) * 1934-10-25 1936-05-09 Louis Peters Verfahren und Vorrichtung zum gleichmaessigen Durchmischen pulverfoermigen Gutes
DE726101C (de) * 1938-04-29 1942-10-21 Karl Ludwig Lanninger Einrichtung zum Umwaelzen des Inhalts von Abwasser- oder Guellegruben im Kreislauf
CH336250A (fr) * 1955-06-28 1959-02-15 Fuller Co Procédé pour le mélange d'une matière pulvérulente et appareil pour la mise en oeuvre du procédé
FR1338537A (fr) * 1962-08-17 1963-09-27 Siderurgie Fse Inst Rech Dispositif de fluidisation de matières pulvérulentes
DE1782092A1 (de) * 1968-07-18 1971-07-08 Inst Chemii Ogolnej Verfahren zum Mischen von pulverfoermigen und feinkoernigen Feststoffen mit Fluessigkeiten und Vorrichtung zur Durchfuehrung des Verfahrens
US3653639A (en) * 1971-02-04 1972-04-04 Whirl Air Flow Corp High pressure air and liquid blending method and apparatus for discrete materials
FR2163802A5 (en) * 1971-12-02 1973-07-27 Rolland A Pasty animal food prods - mixing and distributing appts eg pigswill
GB1462667A (en) * 1974-12-09 1977-01-26 Nat Res Dev Mixing devices
GB1580035A (en) * 1976-05-20 1980-11-26 Boc Ltd Treatment of liquids
FR2508816B1 (fr) * 1981-07-06 1986-06-27 Sertac Procede et silo d'homogeneisation de matieres pulverulentes
DE3433018A1 (de) * 1984-09-07 1986-03-20 Linde Ag Vorrichtung zur biologischen reinigung von abwasser
EP0225526B1 (fr) * 1985-12-05 1993-02-24 ABS International S.A. Appareil pour traiter un liquid avec des gaz ou pour mélanger des liquides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101378672B1 (ko) * 2006-10-30 2014-03-26 더 유니버시티 오브 셰필드 에어레이션 및 다른 목적용 거품 생성

Also Published As

Publication number Publication date
DE3841618A1 (de) 1990-06-13
ES2040444T3 (es) 1993-10-16
DE58903672D1 (de) 1993-04-08
EP0376008A1 (fr) 1990-07-04
ATE86140T1 (de) 1993-03-15

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