EP1631404B1 - Rinceur de gaz comportant des canaux en forme de fentes inclinees - Google Patents

Rinceur de gaz comportant des canaux en forme de fentes inclinees Download PDF

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Publication number
EP1631404B1
EP1631404B1 EP04739509A EP04739509A EP1631404B1 EP 1631404 B1 EP1631404 B1 EP 1631404B1 EP 04739509 A EP04739509 A EP 04739509A EP 04739509 A EP04739509 A EP 04739509A EP 1631404 B1 EP1631404 B1 EP 1631404B1
Authority
EP
European Patent Office
Prior art keywords
exit
entry
slit
channels
gas
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
EP04739509A
Other languages
German (de)
English (en)
Other versions
EP1631404A2 (fr
Inventor
Jürgen KUHLMANN
Werner SCHÖNWELSKI
Klaus Guido Ruwier
Werner Ritter
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.)
LWB Refractories GmbH
Original Assignee
LWB Refractories 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 LWB Refractories GmbH filed Critical LWB Refractories GmbH
Priority to PL04739509T priority Critical patent/PL1631404T3/pl
Publication of EP1631404A2 publication Critical patent/EP1631404A2/fr
Application granted granted Critical
Publication of EP1631404B1 publication Critical patent/EP1631404B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters
    • 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
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor

Definitions

  • the present invention relates to a gas scavenger made of a refractory material, having an entrance surface and an exit surface, with channels of slit-shaped cross-section having an entry slot and an exit slot, wherein the gas bubbler is formed as a truncated cone, at the ends of the inlet surface and the exit surface are arranged wherein the entry slits are disposed in the entrance surface and the exit slits in the exit surface, the passages being straight between the entry surface and the exit surface, the slit cross sections of the channels being substantially radially outward from the truncated cone axis and wherein the projection of the exit slit is one Channel is offset to the entrance surface opposite the entrance slot of the channel.
  • Such bubblers are used in metallurgical melting vessels such as converters or pans to treat the melt contained therein by blowing in gases, such as CO2.
  • gases such as CO2.
  • the effluent gas should in particular lead to a turbulence and thus to a thorough mixing of the melt.
  • the gases flow through the inlet surface, which preferably faces the bottom of the metallurgical vessel, into the gas bubbler and exit at the exit surface.
  • the bubbler is integrated into the refractory lining of the melting vessel.
  • the gas bubbler can be formed from a porous refractory material, so that the gas flows through the entire flusher, resulting in a finely divided gas flow within the melt.
  • channels can also be arranged in the gas bubbler, via which the gas is distributed in the melt.
  • a gas bubbler which is frusto-conical and has parallel to the truncated cone extending slot-shaped channels, the cross-sections have radially star-shaped outward. Furthermore, the channels taper towards the exit surface in such a way that the length of the slot-shaped cross section of the channels decreases.
  • the bubbler has a complicated channel structure with a variety of circular channels on each of which are helically rotated for you.
  • a frusto-conical gas bubbler is also known.
  • This has slot-shaped, parallel to the longitudinal axis of the truncated cone extending channels, each extending between an entrance surface and an exit surface.
  • the slot-shaped channels extend substantially in the truncated cone axis As seen in the radial direction and the projection of the exit slit of a channel on the entrance surface is offset from the entrance slit of the channel.
  • a disadvantage of such a gas bubbler is that there is the danger that only a penetration of the gas takes place through the melt column located above the outlet opening. In such a case, there is no turbulence of the melt, but this remains essentially at rest. This leaves the desired mixing effect.
  • the object of the present invention is to provide a bubbler, which is easy to produce and in which the gas exits in such a way that a good mixing of the melt is achieved, i. a simple penetration of the melt through the gas is avoided.
  • the channels are inclined relative to the truncated cone axis. This results in that the flow direction of the exiting gas is not perpendicular to the exit surface, but rather is inclined to this. Thus, the ferrostatic pressure is not perpendicular to the channels. This has the advantage that the danger of a simple penetration of above the Outlet surface located melt column is reduced. On the other hand, a turbulence in the melt is caused by the oblique exit of the gas, so that particularly good An Albanyraten be achieved. The degree of turbulence is further increased by the gases with a "twist" emerge from the slots.
  • the projections of the exit slits on the entry surface are offset relative to the truncated cone axis in a uniform direction of rotation to the inlet slots, results in a rotationally symmetric flow field of the exiting gases, which in turn to an effective turbulence of the melt in the region Gas purifier leads.
  • the rotationally symmetrical flow field leads to a rotating movement of the melt and there is a good mixing.
  • exit slots offset parallel to the entry slots, a simple production of inclined to the truncated cone channels is made possible.
  • a particularly good turbulence in the region of the gas purging device can be achieved if the outlet slots extend radially outward in a star shape from the truncated cone axis.
  • exit slots In order to achieve the largest possible total exit area while maintaining the rotational symmetry, it may be advantageous if the exit slots have different lengths.
  • the slot-shaped cross section of the channels has a constant length along its course. If a higher gas pressure in the region of the outlet slots is to be achieved, it is preferred, however, if the length of the slot-shaped cross section of the channels decreases from the inlet slot to the outlet slot. This may be necessary, in particular, if penetration of the melt into the channels is to be prevented.
  • the width of the slot-shaped cross section of the channels and the inlet and outlet slots between 0.125 and 0.5 mm. Then, on the one hand, there is no penetration of the melt into the channels and, on the other hand, a sufficiently large gas volume flow is ensured.
  • the gas bubbler 1 shown in Fig. 1 in longitudinal section along the line II in Fig. 2 has the shape of a truncated cone.
  • the gas purifier 1 has an inlet surface 2 and an outlet surface 3, wherein both the inlet surface 2 and the outlet surface 3 extend perpendicular to the truncated cone axis 4.
  • the gas bubbler 1 consists of a refractory material, in particular of a refractory ceramic.
  • channels 5 with a slot-shaped cross-section.
  • the channels 5 each extend from an entry slot 6, which is arranged in the entry surface 2, to an exit slot 7, which is arranged in the exit surface 3.
  • the width of the cross section of the channels 5 perpendicular to its extension direction is between 0.125 and 0.5 mm.
  • the slot-shaped cross sections of the channels 5 point away from the truncated cone axis 4 substantially radially outwards, as can be seen from FIG.
  • the output slots 7 additionally extend radially star-shaped away from the truncated cone axis 4 to the outside.
  • the length of the slit-shaped cross section of the channels 5 is constant along its course.
  • the projections of the exit slits 7 are offset relative to the entry surface 2 with respect to the entry slit 6 of each channel 5, so that the projection of the exit slit 7 does not coincide with the entry slit 6.
  • the channels 5 extend inclined to the truncated cone axis 4 and in particular obliquely impinge on the exit surface 3.
  • FIG. 3 shows that all projections of the exit slits 7 are offset to the left relative to the corresponding entry slits 6 in the exemplary embodiment shown and preferred so far.
  • the projections are thus offset in a uniform direction of rotation relative to the truncated cone axis 4 to the inlet slots 6.
  • the projection of the exit slot 7 in each case runs parallel to the entry slot 6.
  • gas flows from the inlet surface 2 into the gas bubbler 1, it flows from the inlet slits 6 through the channels 5 to the outlet slits 7 arranged in the outlet surface 3.
  • the flow direction of the gas at the outlet slit 7 is inclined to the outlet surface 3
  • Direction of rotation with which the projections of the outlet slots 7 are offset from the inlet slots 6, there is also a rotationally symmetrical flow field above the exit surface 3, which leads to a rotational movement of the melt in this area.
  • This rotating movement leads to a good mixing of the melt.
  • a simple penetration of the melt is avoided by the exiting gas, in which the melt would remain essentially at rest.
  • the illustrated in Fig. 4 second embodiment of a gas purging device 1 according to the invention differs from the previously illustrated by the fact that the extension length of the outlet slots 7 is reduced relative to the inlet slots 6.
  • the length of the slot-shaped cross section of the channels 5 decreases from the inlet slot 6 to the outlet slot 7. This results in the flow through the fact that the pressure at the outlet slot 7 is increased in comparison to the inlet slot 6 and penetration of the melt into the channels 5 is difficult.
  • a part of the channels 5 has outlet slots 7 'and inlet slots 6', which have a greater length than the other inlet and outlet slots 6, 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Gas Separation By Absorption (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • External Artificial Organs (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Claims (7)

  1. Rinceur de gaz en matériau résistant au feu, avec une surface d'entrée et une surface de sortie, avec des canaux à section en forme de fente, qui comprennent une fente d'entrée et une fente de sortie, le rinceur de gaz étant configuré comme un cône tronqué, à l'extrémité duquel sont disposées la surface d'entrée et la surface de sortie, dans lequel les fentes d'entrée sont disposées dans la surface d'entrée et les fentes de sortie sont disposées dans la surface de sortie, dans lequel les canaux s'étendent en ligne droite entre la surface d'entrée et la surface de sortie, dans lequel les sections transversales en forme de fente des canaux sont orientées de l'axe de cône tronqué essentiellement radialement vers l'extérieur et dans lequel la projection de la fente de sortie d'un canal sur la surface d'entrée est décalée par rapport à la fente d'entrée du canal,
    caractérisé en ce que les projections des fentes de sortie (7) sur la surface d'entrée (2) sont décalées par rapport à l'axe de cône tronqué (4) dans un sens de rotation uniforme par rapport aux fentes d'entrée (6).
  2. Rinceur de gaz selon la revendication 1, caractérisé en ce que les projections des fentes de sortie (7) sur la surface d'entrée (2) sont décalées parallèlement aux fentes d'entrée (6).
  3. Rinceur de gaz selon la revendication 1 ou 2,
    caractérisé en ce que les fentes de sortie (7) s'étendent radialement en étoile vers l'extérieur à partir de l'axe de cône tronqué (4).
  4. Rinceur de gaz selon une des revendications 1 à 3, caractérisé en ce que les fentes de sortie (7) présentent différentes longueurs.
  5. Rinceur de gaz selon une des revendications 1 à 4, caractérisé en ce que la section transversale en forme de fente des canaux (5) présente le long de son étendue une longueur constante.
  6. Rinceur de gaz selon une des revendications 1 à 4, caractérisé en ce que la longueur de la section transversale en forme de fente des canaux (5) décroît de la fente d'entrée (6) à la fente de sortie (7).
  7. Rinceur de gaz selon une des revendications 1 à 6, caractérisé en ce que la largeur de la section transversale en forme de fente des canaux (5) et des fentes d'entrée et de sortie (6, 7) est comprise entre 0,125 mm et 0,5 mm.
EP04739509A 2003-06-06 2004-06-02 Rinceur de gaz comportant des canaux en forme de fentes inclinees Expired - Lifetime EP1631404B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04739509T PL1631404T3 (pl) 2003-06-06 2004-06-02 Płuczka gazowa z nachylonymi szczelinowymi kanałami

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10326113A DE10326113B3 (de) 2003-06-06 2003-06-06 Gasspüler mit geneigten schlitzförmigen Kanälen
PCT/EP2004/005925 WO2004108328A2 (fr) 2003-06-06 2004-06-02 Rinceur de gaz comportant des canaux en forme de fentes inclinees

Publications (2)

Publication Number Publication Date
EP1631404A2 EP1631404A2 (fr) 2006-03-08
EP1631404B1 true EP1631404B1 (fr) 2006-12-13

Family

ID=33441588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04739509A Expired - Lifetime EP1631404B1 (fr) 2003-06-06 2004-06-02 Rinceur de gaz comportant des canaux en forme de fentes inclinees

Country Status (9)

Country Link
US (2) US20040245683A1 (fr)
EP (1) EP1631404B1 (fr)
CN (1) CN100360260C (fr)
AT (1) ATE347950T1 (fr)
DE (2) DE10326113B3 (fr)
ES (1) ES2279382T3 (fr)
PL (1) PL1631404T3 (fr)
TW (1) TWI324183B (fr)
WO (1) WO2004108328A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7377497B2 (en) * 2005-09-16 2008-05-27 Philadelphia Gear Corporation Aeration system and method

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538498A1 (de) * 1985-10-30 1987-05-07 Didier Werke Ag Einduesvorrichtung fuer metallurgische gefaesse
US5037072A (en) * 1986-07-15 1991-08-06 Flo-Con Systems, Inc. Injection block and method
US5050847A (en) * 1986-07-15 1991-09-24 Flo-Con Systems, Inc. Staged valve multi-hole injection block and method
DE3625117C1 (en) * 1986-07-25 1987-11-26 Didier Werke Ag Gas-flushing cone
IN168760B (fr) * 1987-04-10 1991-06-01 Injectall Ltd
DE3734713A1 (de) * 1987-10-14 1989-04-27 Pa Ha Ge Huetten Und Giesserei Spuelstein fuer metallurgische gefaesse
US4836433A (en) * 1988-05-13 1989-06-06 Insul Company, Inc. Device for introducing stirring gas into molten metal in metered amount
US4938461A (en) * 1989-06-02 1990-07-03 Zedmark Refractories Corp. Device for distributing gas into molten metal
US5156801A (en) * 1990-06-04 1992-10-20 Refractory Services Corp. Low porosity-high density radial burst refractory plug with constant flow
US5104097A (en) * 1990-09-14 1992-04-14 Martin & Pagenstecher Gmbha Gas stir plugs with slots and method of making the same
US5225143A (en) * 1991-02-01 1993-07-06 Insul Company, Inc. Device for directional gas distribution into molten metal
CA2091280C (fr) * 1991-06-18 1996-06-11 Michael D. Ii Labate Dispositif pour orienter un jet de gaz dans un metal en fusion
JP3879794B2 (ja) * 1998-03-19 2007-02-14 東京窯業株式会社 ガス吹きプラグ
JP3126122B1 (ja) * 1999-08-19 2001-01-22 東京窯業株式会社 ガス吹き込み用プラグ及びその製作方法

Also Published As

Publication number Publication date
TW200523371A (en) 2005-07-16
DE502004002317D1 (de) 2007-01-25
EP1631404A2 (fr) 2006-03-08
CN100360260C (zh) 2008-01-09
WO2004108328A3 (fr) 2005-03-10
ATE347950T1 (de) 2007-01-15
PL1631404T3 (pl) 2007-05-31
US20060220282A1 (en) 2006-10-05
US20040245683A1 (en) 2004-12-09
CN1809434A (zh) 2006-07-26
WO2004108328A2 (fr) 2004-12-16
ES2279382T3 (es) 2007-08-16
TWI324183B (en) 2010-05-01
DE10326113B3 (de) 2004-12-16
US7384593B2 (en) 2008-06-10

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