WO2004113576A2 - Systeme de tuyeres et cuve de coulee metallurgique associee - Google Patents

Systeme de tuyeres et cuve de coulee metallurgique associee Download PDF

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Publication number
WO2004113576A2
WO2004113576A2 PCT/EP2004/006822 EP2004006822W WO2004113576A2 WO 2004113576 A2 WO2004113576 A2 WO 2004113576A2 EP 2004006822 W EP2004006822 W EP 2004006822W WO 2004113576 A2 WO2004113576 A2 WO 2004113576A2
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle device
end section
channel
nozzle
channels
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.)
Ceased
Application number
PCT/EP2004/006822
Other languages
German (de)
English (en)
Other versions
WO2004113576A3 (fr
Inventor
Christian Artner
Hans-Jörg Junger
Hubert Brenner
Mathias Maierbrugger
Hansjörg Benigni
Ewald Schumacher
Renata Franzky
Edgar Schumacher
Viktor Khloponiin
Anatolij Belitchenko
Nikolay Andrianov
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.)
RHI AG
Original Assignee
RHI AG
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 RHI AG filed Critical RHI AG
Publication of WO2004113576A2 publication Critical patent/WO2004113576A2/fr
Publication of WO2004113576A3 publication Critical patent/WO2004113576A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/18—Charging particulate material using a fluid carrier
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/22—Arrangements of air or gas supply devices
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
    • F27D2003/163—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being an oxidant
    • F27D2003/164—Oxygen
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/167—Introducing a fluid jet or current into the charge the fluid being a neutral gas
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/168—Introducing a fluid jet or current into the charge through a lance
    • F27D2003/169—Construction of the lance, e.g. lances for injecting particles

Definitions

  • the invention relates to a nozzle device for introducing fluid media into a melt, in particular a metallurgical melt, and an associated metallurgical melting vessel.
  • nozzle device encompasses all devices through which a gas and / or solids can be transported.
  • fluid media encompasses inert gases and oxygen as well as pulverulent substances for treating a melt, in particular a metallurgical melt.
  • metallurgical melting vessel encompasses all containers in which molten metal is formed, treated and / or transported. Such a melting vessel can be, for example, a ladle, an SM furnace (Siemens Martin furnace) or an electric furnace.
  • ceramic gas purging stones which are designed with non-directional or directional porosity.
  • static channels run through the sink, which is installed in the wall or in the bottom of the melting vessel.
  • nozzle devices are known.
  • the device according to WO 93/09255 consists of a ceramic refractory casing in which two pipes arranged concentrically to one another run.
  • the device is built into the (fireproof) wall of a metallurgical melting vessel.
  • Treatment media are fed into the molten metal through the inner tube or an annular gap between the inner and outer tubes.
  • the two metal pipes can be adjusted in the direction of the melt.
  • the service life of the facility is extended accordingly.
  • the "tracking" of the nozzle device is only possible to a certain extent. If, for example, 1/3 of the length of the rod-shaped nozzle device is worn out, the risk is too great, the nozzle device continue to advance towards the melt, apart from the technical difficulties involved.
  • the security provided by the refractory material against penetration or breakthrough of molten metal is then too high.
  • the metallurgical treatment must be interrupted.
  • the existing nozzle device must be removed.
  • a new nozzle device must be installed.
  • the invention is based on the object of specifying a nozzle device and an associated metallurgical vessel, with which an extension of the treatment time of the metallurgical melt with gas and / or solids is possible.
  • the aim is "continuous treatment as possible”.
  • Each nozzle device inevitably has a "finite length".
  • the length of the nozzle devices known from the prior art is indicated by "X" below.
  • X The length of the nozzle devices known from the prior art.
  • the outlet end of the nozzle device usually ends in the area of the inside of the refractory lining. If the length is greater, this means that a considerable length of the nozzle device must be supported and guided on the outside.
  • the channels through which the gas or the solids are transported often become clogged, for example due to penetrating molten metal. Even when the nozzle device is adjusted, these blockages can only be partially removed by melting solidified metal melt again.
  • An essential idea of the invention lies in the knowledge that the length of the individual nozzle device is irrelevant. This can even be smaller than in the prior art (X).
  • An extension of the treatment cycle can, however, be achieved if the nozzle device is designed such that a further nozzle device can be added on the outside in each case.
  • at least one end of the nozzle device must be designed in such a way that an axially tracking nozzle device can be connected to the end of the nozzle device arranged in front of it, and in such a way that the two nozzle devices virtually complement each other to form a "double-length nozzle device".
  • the individual nozzle device must be designed such that the transport of the fluid medium is not interrupted even if the nozzle device is connected to a further nozzle device.
  • the individual nozzle device can be made relatively short. It can even be shorter than the thickness of the wall of the metallurgical melting vessel. This results in advantages in the manufacture of the nozzle device as well as stability and security.
  • the individual nozzle device will have a length that is greater than the wall thickness of the associated furnace, in order to be able to connect a further nozzle device from the outside. But even in this case, the nozzle device remains "relatively short", so that no particular difficulties arise during assembly / storage / guidance when connecting the further nozzle device.
  • the invention relates to a nozzle device for introducing fluid media into a melt, with the following features:
  • At least one channel extending from a first end portion of the body through it to a second end portion of the body
  • a device at the first end section for supplying at least one fluid into the at least one channel
  • rod-shaped body is to be understood to mean that the body generally has a greater (axial) length in relation to its width or its diameter.
  • the length is 1 to 2 meters and the maximum width (or maximum diameter) is 10 to 30 centimeters.
  • the nozzle device is arranged axially displaceably in the refractory lining of the melting vessel. It is therefore advisable to design the nozzle device with a circular cross section.
  • the nozzle device can then be guided, for example, in a so-called perforated brick, which is installed in the wall or in the bottom of the melting vessel. This measure per se is known, for example, from WO 93/09255, to which reference is made to avoid repetition.
  • An oval cross-sectional shape of the nozzle device is also suitable.
  • the adapter mentioned which is used to connect adjacent nozzle devices, can be formed in situ from the ceramic part of the nozzle device. It can also consist of a sleeve which is attached to or on an end section and protrudes beyond this end section. The sleeve then offers a kind of "pot-like receptacle" for a subsequent nozzle device.
  • the adapter can be designed with a thread (external or internal thread). In this embodiment, it is advisable to provide a second adapter, at the other end section of the body, with a corresponding thread. In this way, the adapter on the 1st section of one nozzle device can be positively connected to the adapter on the 2nd end section of the other nozzle device.
  • nozzle devices to be arranged one behind the other are also possible, for example in the manner of a bayonet catch.
  • the fluid medium is usually supplied via a pipeline, which is arranged at the inlet-side end section of the nozzle device and opens, for example, into a gas distribution chamber, from which the channel or channels extend through the body.
  • a pipeline which is arranged at the inlet-side end section of the nozzle device and opens, for example, into a gas distribution chamber, from which the channel or channels extend through the body.
  • the device for supplying the fluid to be removable In this way, adjacent nozzle devices can be placed directly next to one another.
  • the type and design of the channel or channels can in principle be arbitrary. In extreme cases, a channel (for example a tubular opening) runs through the body.
  • the following embodiments only represent exemplary embodiments, with which, however, various advantages can be achieved, some of which are specified.
  • the body viewed in the axial direction, can be designed with a large number of capillary channels which extend from the 1st end section towards the 2nd end section up to a maximum of half the length of the body.
  • capillary channels describes such passage openings for the fluid, the cross-section of which precludes infiltration of the molten metal.
  • such capillary channels have, for example, a slot shape, the width of each slot not exceeding 1 millimeter.
  • the capillaries can also have a circular cross section, the diameter of which should not exceed 1.5 millimeters.
  • the capillary channels can be formed in situ (for example by burnout elements); it is also possible to provide the capillary channels, for example by means of metal tubes.
  • the capillary channels should extend over a length of ⁇ 30%, ⁇ 20% or ⁇ 10% of the total length of the body.
  • the purpose of this is:
  • the claimed nozzle device means that it can form the outlet end for the fluid over the entire length (depending on wear). Normally, the fluid should get as deep as possible into the melt, for which purpose channels of larger cross-section are preferably suitable. These are described below. If the nozzle device has been advanced so far that only the (rear) section with the capillary channels is present in the area of the inner wall of the metallurgical vessel, the metallurgical treatment must take place over this section at least for a short period of time. In order to keep it as short as possible, the corresponding section should be as small as possible. By further advancing, further treatment by the subsequent nozzle device can take place at short notice.
  • the body viewed in the axial direction, correspondingly has at least one channel which extends from the second end section in the direction of the first end section and ends at a distance from the free end of the body associated with the first end section.
  • the length of this channel should be at least 60%, 70% or at least 80% of the total length of the body.
  • the (greater length) of the "main rinsing channels" compared to the capillary channels makes it possible to carry out the treatment of the melt for a correspondingly long time via these channels, which have a larger cross section than the capillary channels. This increases the risk of infiltration of the molten metal;
  • the capillary channels arranged in the rear (outer) part of the body form, according to the invention, a kind of "breakdown protection” by building up a fluidic resistance for any penetrating melt.
  • a chamber (gas distribution) for fluidic connection can be arranged between the capillary channels and the further channel (s).
  • the gas distribution chambers can be formed (limited) from steel or highly compressed ceramic materials. However, they can also be formed in situ from the ceramic material of the nozzle device, for example by burning out.
  • the invention comprises a metallurgical melting vessel with at least one nozzle device according to one of claims 1-20 in the wall or floor area, in which the nozzle device (s) is axially advanced, axially moved back and / or rotatably guided in a refractory ceramic casing. It goes without saying that appropriate mechanical devices must be provided for the movements mentioned.
  • FIG. 1 shows a side view of a nozzle device
  • FIG. 2 shows the sections indicated in FIG. 1
  • FIG. 3 shows two nozzle devices arranged one behind the other, partially running in associated perforated stones. All figures are highly schematic and not to scale.
  • the nozzle device consists of a rod-shaped body 10 of a length X. As the sections according to FIG. 2 show, the body 10 made of refractory ceramic material has a circular cross section.
  • the ceramic part 10k of the body 10 is protruded at a 1st end section 12 by a metal sleeve 14 which is connected to the ceramic part and has an internal thread 14g.
  • the sleeve 14 is aligned on the outside with the peripheral surface of the ceramic part 10k of the body 10.
  • a further sleeve 18 is arranged in the body 10k, which projects axially beyond the ceramic part 10k and has an external thread 1 8g, which is designed and arranged corresponding to the internal thread 14g of the sleeve 14.
  • the channels 20 project beyond the ceramic part 10k of the body 10 at the second end section 16, the latter Part is designated 20v.
  • the part 20v ends before the free end of the sleeve 18.
  • the channels 20 end in a gas distribution chamber 22 which is formed in the ceramic body 10k.
  • a plurality of capillary channels 24 extend from the gas distribution chamber 22 in the axial extension of the channels 20 to a further gas distribution chamber 26, which partly lies in the ceramic part 10k of the body 10, but also projects slightly beyond it (analogously to the part 20v of the channels 20).
  • a line 28 which has an external thread, runs from this further gas distribution chamber 26.
  • the line 28 ends more or less flush with the free end of the sleeve 14,
  • a gas supply line (not shown) can be connected to line 28.
  • the line 28 is in fluidic connection with the gas distribution chamber 26, with the subsequent capillary channels 24, the subsequent gas distribution chamber 22 and the further channels 20, so that a treatment gas with or without solids is transported through the body 10k can be.
  • This nozzle device is installed, for example in the wall of a converter, for example by inserting it into a corresponding perforated brick.
  • FIG. 3 shows such a refractory ceramic perforated brick, which here consists of four segments 30, 32, 34, 36 arranged one behind the other.
  • the end segments 30, 36 have a slightly smaller inner diameter than the middle segments 32, 34, so that an annular space 38 is created between the nozzle device and the segments 32, 34, which can accommodate a refractory lubricant, in order to ensure the axial mobility of the nozzle devices during operation to facilitate.
  • the treatment can the metallurgical melt, for example by means of an inert gas such as argon.
  • the second end section 16 is adjacent to the molten metal M. This leads directly to melting of the sleeve 18.
  • a further, in particular identical nozzle device with its second end section 16 is placed on the first end section 12 of the existing nozzle device (here: screwed on), the gas connection line being removed for a short time for this purpose. Because of the structural design shown, part 20v of the further nozzle device is pushed into line 28 when screwed on. After connecting the two nozzle devices, the gas connection line is reconnected to line 28 of the further (new) nozzle device and the purging treatment can continue with only a brief interruption. This measure can be repeated almost arbitrarily. It no longer depends on the service life of the nozzle device, as in the prior art, but only on the service life of the refractory lining of the metallurgical melting vessel, which means considerable progress.
  • the dimensioning of the nozzle devices in relation to the perforated brick is such that xi + L]> x 2 + L 2 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

L'invention concerne un système de tuyères et une cuve de coulée métallurgique associée, pour introduire des milieux fluides dans une matière en fusion.
PCT/EP2004/006822 2003-06-25 2004-06-24 Systeme de tuyeres et cuve de coulee metallurgique associee Ceased WO2004113576A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003128420 DE10328420B3 (de) 2003-06-25 2003-06-25 Düseneinrichtung und deren Verwendung in einem metallurgischen Schmelzgefäß
DE10328420.6 2003-06-25

Publications (2)

Publication Number Publication Date
WO2004113576A2 true WO2004113576A2 (fr) 2004-12-29
WO2004113576A3 WO2004113576A3 (fr) 2005-04-21

Family

ID=32748328

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/006822 Ceased WO2004113576A2 (fr) 2003-06-25 2004-06-24 Systeme de tuyeres et cuve de coulee metallurgique associee

Country Status (2)

Country Link
DE (1) DE10328420B3 (fr)
WO (1) WO2004113576A2 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070109A1 (fr) * 1981-07-08 1983-01-19 Dyson Refractories Limited Lances immergées
DE3318422C2 (de) * 1983-05-20 1985-03-21 Didier-Werke Ag, 6200 Wiesbaden Gasspülanordnung und Verfahren zur Betätigung einer derartigen Anordnung
JPS62103313A (ja) * 1985-10-30 1987-05-13 Nippon Stainless Steel Co Ltd 冶金処理炉用吹込管
DE4136552A1 (de) * 1991-11-06 1993-05-13 Kortec Ag Dueseneinrichtung zum einleiten von medien in eine schmelze und verfahren zum betrieb dieser dueseneinrichtung
JP2002256327A (ja) * 2001-03-06 2002-09-11 Nkk Corp 精錬用ランス

Also Published As

Publication number Publication date
WO2004113576A3 (fr) 2005-04-21
DE10328420B3 (de) 2004-08-26

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