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EP0407535A1 - Recipient metallurgique et son agencement. - Google Patents

Recipient metallurgique et son agencement.

Info

Publication number
EP0407535A1
EP0407535A1 EP90901721A EP90901721A EP0407535A1 EP 0407535 A1 EP0407535 A1 EP 0407535A1 EP 90901721 A EP90901721 A EP 90901721A EP 90901721 A EP90901721 A EP 90901721A EP 0407535 A1 EP0407535 A1 EP 0407535A1
Authority
EP
European Patent Office
Prior art keywords
vessel
metallurgical
rinsing
working position
metallurgical vessel
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.)
Granted
Application number
EP90901721A
Other languages
German (de)
English (en)
Other versions
EP0407535B1 (fr
Inventor
Fritz Hoedl
Josef Horak
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.)
Veitsch Radex GmbH and Co OG
Original Assignee
Veitscher Magnesitwerke 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 Veitscher Magnesitwerke AG filed Critical Veitscher Magnesitwerke AG
Publication of EP0407535A1 publication Critical patent/EP0407535A1/fr
Application granted granted Critical
Publication of EP0407535B1 publication Critical patent/EP0407535B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • 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

Definitions

  • the invention relates to a metallurgical vessel with several in the
  • Groups of flushing injection elements arranged in the vessel wall, which can assume several working positions by rotating about a horizontal axis.
  • Each of these groups consists of at least one nozzle, at least one sink or the like.
  • a converter which can be rotated about a horizontal axis and which has two diametrically opposite nozzle groups in the side wall which can alternately be acted upon by air and oxygen. In the upright position of this converter, all of these groups of nozzles lie above the bath surface. When the wind is fresh, this converter is tilted alternately in both directions, whereby one group of nozzles is located below the surface of the bath. This nozzle group blows oxygen or oxygen-enriched air for freshening up through the bath, while atmospheric air is fed through the bath above the bath for post-combustion and cooling of the nozzles.
  • This known converter is a wind freshener that is only suitable for a single operation, namely freshening.
  • a converter which has a plurality of nozzles which in the working position are partly above and partly below the bath surface. Oxygen can be blown onto the bath when freshening up, while a fuel is injected into the bath from below together with oxygen and possibly with slag formers.
  • Such a converter is also only suitable for a single work process, namely refreshing.
  • the fresh steel must be brought to the desired final composition with regard to the alloying and accompanying elements or the gases dissolved in the liquid steel by means of a secondary metallurgical treatment in particular.
  • flushing gases but also solids, such as alloying agents, are introduced into the steel bath through nozzles put into operation under the bath.
  • the requirements for these nozzles, hereinafter referred to as flushing injection elements, are very different.
  • flushing injection elements For some treatment steps, such as the injection of solids with a flushing gas that acts as a blowing agent, separate vessels are required because the nozzles used for this purpose may only be below the surface of the bath for a short period of time.
  • each additional vessel means heat losses in the production of the steel and an extension of the production time.
  • the object of the present invention is to provide a metallurgical vessel for treating steel, in which the steel can be subjected to as many treatment steps as possible.
  • At least two groups of different flushing injection elements are provided for carrying out different, preferably secondary metallurgical process steps, such as flushing processes or the injection of solids, at least one of which is below the bath surface in each working position of the vessel.
  • At least one group of rinsing injection elements is preferably provided, which is attached in an area of the vessel wall that lies above the bath surface in a working position of the vessel, these rinsing injection elements being designed to be inactive. Not all rinsing injection elements can be designed in such a way that they can remain permanently under the surface of the bath. In operation, the procedure is therefore such that these sensitive rinsing injection elements only come to rest under the bath surface during their operation. The injected medium then simultaneously serves to cool these components. In the working position in which this group of flushing injection elements lies above the bath surface, these elements can be deactivated.
  • Vessel wall is always understood here to mean the entire boundary of the metallurgical vessel, including the bottom and side walls.
  • the vessel is essentially cylindrical and if it has a working position with a horizontal axis and a working position with a vertical axis. This enables a very simple construction of the vessel to be achieved. In this way, the processes taking place in the interior of the vessel can also be best determined by mathematical models. The mechanical loads on the vessel can also be best managed in this way.
  • a rinsing injection element is arranged in an area of the vessel wall which is in a working position above the bath surface, while in a different working position it is below the bath surface.
  • This flushing element can also be replaced during operation when the vessel is full.
  • This flushing element can be designed as a concentric annular gap nozzle. Concentric annular gap nozzles in particular are sensitive components that will be destroyed by the weld pool if no special measures are taken. In principle, it is possible to cool such nozzles with water, but this has the disadvantage that it removes heat from the weld pool, which has a negative effect on the quality of the steel produced.
  • annular gap nozzles are brought under the bath surface only if solids are to be injected into the bath by means of a carrier gas, they are sufficiently cooled by the carrier gas. All other process steps are carried out in a position of the vessel in which these annular gap nozzles are located above the bath surface.
  • the ratio of diameter to height of the vessel is between 0.5 and 3, preferably between 1 and 2. In experiments, these values have proven to be advantageous for the slenderness of the vessel.
  • the vessel is designed as an essentially cylindrical vessel, which is arranged pivotably about an axis parallel to the cylinder axis. In this way, several flushing injection elements can be distributed over the length of the vessel, whereby the occurrence of dead corners is reliably avoided.
  • the vessel is preferably designed as a pan for secondary metallurgical process steps for the production of steel and has a spout with a slide closure. A large number of secondary metallurgical process steps are required, particularly in the production of high-purity steels. The possibility of being able to carry out different method steps in one vessel has a particularly advantageous effect here.
  • melt can be drawn off in a much more controlled manner via a tapping than is possible when emptying converters via its filling opening.
  • slide closures have proven to be particularly favorable.
  • an additional heater with electrodes for generating arcs is provided.
  • the electrodes are inserted through the opening of the vessel from above.
  • three three-phase electrodes are used, which are arranged in an equilateral triangle.
  • the electrodes can also be arranged in a row. It is also possible to use several groups of three electrodes. These measures make it easy to set an optimal temperature profile even during longer treatment steps.
  • the invention further relates to an arrangement of the vessel described above in a vacuum bell.
  • This arrangement is characterized in that the walls of the vacuum bell are arranged outside the pivoting range of the vessel. It is sometimes beneficial to have process steps in steel making under reduced pressure. If the vessel according to the invention is arranged in a vacuum bell so that all working positions are possible, a particularly large area of use is covered.
  • the invention is explained in more detail below with reference to the schematic drawings. Show:
  • FIG. 1 shows an embodiment of a vessel according to the invention in cross section in the standing position
  • FIG. 2 shows the vessel shown in FIG. 1 in cross section in the lying position
  • FIG. 3 shows an arrangement of the vessel according to the invention in a vacuum bell
  • FIGS. 4a to 4c and 5a to 5c show two further embodiment variants of the invention in section
  • FIG. 6 shows a section through the embodiment variant of FIGS. 5a to 5c with additional heating
  • Fig. 7 is a section along line VII-VII in Fig. 6 and
  • Fig. 8 is a plan view of a further embodiment of the invention.
  • the essentially cylindrical vessel 1 is equipped on its outer surface with an annular gap nozzle 2 for injecting solids by means of a carrier gas.
  • a sink 3 is provided, through which a gas 8 can be blown.
  • a spout 4 provided with a slide closure is arranged in the bottom 7.
  • Vessel 1 is rotatably supported about a horizontal axis 5.
  • the vessel 1 has a steel jacket 10 in the usual way and is equipped on the inside with a plurality of lining layers 11, 12. In the standing position of the vessel 1 shown in FIG.
  • the bath surface 6b is below the axis 5.
  • a gas-solid suspension 9 can be blown into the bath through the annular gap nozzle 2. If necessary, it can also be rinsed through the sink 3.
  • the sink 3 and the spout 4 can, in contrast to the embodiment shown in FIGS. 1 and 2, be arranged reversed in terms of their position.
  • a substantially spherical vacuum bell 13 is provided, the diameter of which is larger than the greatest longitudinal extent of the vessel 1.
  • the vessel 1 is suspended in such a way that the axis 5 is approximately through the center of the ball runs.
  • a loading opening 14, a discharge opening 15 and a suction nozzle 16 are provided in the bell.
  • the secondary metallurgical process can, for example, proceed as follows when using the vessel according to the invention:
  • the vessel 1 In the standing position (FIG. 1), the vessel 1 is filled with the liquid charge and already subjected to, for example, a flushing process, for which purpose a flushing gas is introduced through a flushing element 3.
  • the vessel is then brought into a lying position (FIG. 2).
  • the annular gap nozzle 2 previously located above the bath surface 6a dips below the bath surface 6b and fine adjustments can be carried out on the metal bath, such as, for example, injecting granules or flushing in other solids at the same time Adding detergent for homogenization.
  • the vessel 1 is raised again for emptying via the spout 4.
  • the advantage of this vessel lies in the arrangement of the annular gap nozzle 2 in such a way that it lies outside the metal bath when not in use and can be used again and again. If necessary, it can be cooled by a gaseous medium in a manner which is practically easy to carry out, without having a significant influence on the metal bath.
  • a cylindrical vessel is shown in three working positions.
  • the vessel is rotatably supported about an axis 18 parallel to the vessel axis 17.
  • the loading opening 19 is directed upwards.
  • the spout 4 is then at the lowest point of the vessel; a group of nozzles 20 is arranged so that they are also in this position at about the lowest point of the vessel.
  • This group of nozzles 20 is located in all working positions of the vessel below the bath surface 22a, 22b and 22c.
  • this nozzle group 20 has an optimal position for performing purging processes, since the gas can flow in centrally at the lowest point.
  • operations can also be carried out by means of the nozzles 20.
  • Another group of nozzles 21 is arranged laterally in the vessel wall, so that it is located above the bath surface 22a and 22b in the positions shown in FIGS. 4a and 4b. Only in the position shown in FIG. 4c are these nozzles below the bath surface 22c, so that rinsing processes can then be carried out or solids can be injected.
  • the vessel shown in FIGS. 5a, 5b and 5c essentially corresponds to the vessel of FIGS. 4a, 4b and 4c with the exception of the arrangement of the nozzle groups 23 and 24.
  • the two nozzle groups 23 and 24 are symmetrical in the lower lateral areas of the vessel wall brought in.
  • both nozzle groups 23 and 24 lie below the bath surface 22a.
  • the nozzle group 24 lies above the bath surface 22b and in the working position shown in FIG. 5c, the nozzle group 23 lies above the bath surface 22c.
  • Electrodes 25 are inserted through the feed opening 19. This is
  • electrodes are suspended in a holder 26 and connected to a power supply device 27.
  • the three three-phase electrodes 25 are arranged in a row in the elongated vessel.
  • the electrode groups 28, 29 are each arranged in the form of an equilateral triangle.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

Un récipient métallurgique (1) comprend plusieurs groupes d'injecteurs de rinçage (2, 3) agencés dans sa paroi et peut prendre par rotation autour d'un axe horizontal (5) plusieurs positions de travail. Afin de mettre en oeuvre différents procédés métallurgiques, de préférence secondaires, tels que procédés de rinçage ou d'injection de matières solides, au moins deux groupes différents d'injecteurs de rinçage (2, 3) divers sont prévus, dont au moins un est situé au-dessous de la surface du bain (6) dans chaque position de travail du récipient (1).
EP90901721A 1989-01-13 1990-01-11 Recipient metallurgique et son agencement Expired - Lifetime EP0407535B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0005989A AT394395B (de) 1989-01-13 1989-01-13 Metallurgisches gefaess und anordnung desselben
AT59/89 1989-01-13
PCT/AT1990/000003 WO1990008200A1 (fr) 1989-01-13 1990-01-11 Recipient metallurgique et son agencement

Publications (2)

Publication Number Publication Date
EP0407535A1 true EP0407535A1 (fr) 1991-01-16
EP0407535B1 EP0407535B1 (fr) 1994-04-13

Family

ID=3480439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90901721A Expired - Lifetime EP0407535B1 (fr) 1989-01-13 1990-01-11 Recipient metallurgique et son agencement

Country Status (6)

Country Link
EP (1) EP0407535B1 (fr)
AT (2) AT394395B (fr)
AU (1) AU4847790A (fr)
DE (1) DE59005326D1 (fr)
ES (1) ES2051009T3 (fr)
WO (1) WO1990008200A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1352580A (en) * 1910-08-10 1920-09-14 Cinille Georges Manufacture of steel
DE901543C (de) * 1951-04-06 1954-01-11 Louis Francois Alexis Vignot Konverter zur Erzeugung von Windfrisch-Stahl mit Sauerstoffanwendung
DE1217985B (de) * 1957-06-19 1966-06-02 Huettenwerk Oberhausen Ag Verfahren zur Herstellung stickstoffarmer Staehle
AR205514A1 (es) * 1971-03-30 1976-05-14 Creusot Loire Procedimiento de proteccion de una pared refractaria en servicio
BE792128A (fr) * 1971-12-06 1973-03-16 Uss Eng & Consult Procede et installation pour l'affinage de l'acier
DE2505725A1 (de) * 1974-02-21 1975-09-04 Uddeholms Ab Metallurgischer reaktor
US4026698A (en) * 1975-09-18 1977-05-31 Urban Reclamation Technologies, Inc. Removal of tin from molten iron by chlorination, using oxygen to conserve chlorine and to produce tin oxide
JPS5442324A (en) * 1977-09-10 1979-04-04 Nisshin Steel Co Ltd Control procedure of steel making process using mass spectrometer
US4195985A (en) * 1977-12-10 1980-04-01 Eisenwerk-Gesellschaft Maximilianshutte Mbh. Method of improvement of the heat-balance in the refining of steel
US4329171A (en) * 1981-01-08 1982-05-11 Pennsylvania Engineering Corporation Steel making method
BE889171A (fr) * 1981-06-10 1981-10-01 Centre Rech Metallurgique Perfectionnements aux procedes et dispositifs d'affinage de fonte
DE3130972A1 (de) * 1981-08-05 1983-02-24 Messer Griesheim Gmbh, 6000 Frankfurt "verfahren zum vorwaermen und aufheizen von leeren aod-konvertern"

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9008200A1 *

Also Published As

Publication number Publication date
ATA5989A (de) 1991-09-15
DE59005326D1 (de) 1994-05-19
ATE104359T1 (de) 1994-04-15
WO1990008200A1 (fr) 1990-07-26
ES2051009T3 (es) 1994-06-01
AU4847790A (en) 1990-08-13
EP0407535B1 (fr) 1994-04-13
AT394395B (de) 1992-03-25

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