EP0155255A2 - Dispositif de rinçage pour un récipient métallurgique - Google Patents

Dispositif de rinçage pour un récipient métallurgique Download PDF

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Publication number
EP0155255A2
EP0155255A2 EP85890007A EP85890007A EP0155255A2 EP 0155255 A2 EP0155255 A2 EP 0155255A2 EP 85890007 A EP85890007 A EP 85890007A EP 85890007 A EP85890007 A EP 85890007A EP 0155255 A2 EP0155255 A2 EP 0155255A2
Authority
EP
European Patent Office
Prior art keywords
flushing
plate
distributor
channels
flushing device
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.)
Withdrawn
Application number
EP85890007A
Other languages
German (de)
English (en)
Other versions
EP0155255A3 (fr
Inventor
Aktiengesellschaf Voest-Alpine
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.)
Voestalpine AG
Original Assignee
Voestalpine 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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0155255A2 publication Critical patent/EP0155255A2/fr
Publication of EP0155255A3 publication Critical patent/EP0155255A3/fr
Withdrawn legal-status Critical Current

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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
    • 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

Definitions

  • the invention relates to a flushing device for a metallurgical vessel, the bottom and walls of which are lined up with refractory bricks arranged in a row.
  • a stirring effect can be achieved in the molten metal, which compensates for imbalances in composition and temperature, causes the deposition of non-metallic inclusions and promotes a certain degassing of the molten metal.
  • the sheet metal jacket is open towards the converter interior; at the opposite end of the sink, at which the sheet metal jacket is closed, a feed line to the sheet metal jacket is gas-tight closed.
  • Flushing stones of this type have the disadvantage that they are complicated to manufacture and install, and that an uncontrolled gas passage can occur between the sheet metal casing and the porous, refractory mass contained therein if the refractory mass is not completely in contact with the sheet metal jacket.
  • a sink has wear that is premature compared to the wear lining of the converter, so that material and time-consuming repair measures are required between two new feedings of the wear lining.
  • the invention aims to avoid these disadvantages and difficulties and has as its object to provide a flushing device which makes it possible to form the entire lining of the metallurgical vessel from conventional, refractory bricks, so that uniform wear without premature repairs caused by the flushing device is ensured, wherein the purging can be switched off despite the presence of melt and a constant, controlled flow of the purge gas is guaranteed during the operating time of the metallurgical vessel between two relining of the wear lining.
  • a metallic flushing plate is installed at predetermined locations on the floor and / or the walls between adjacent refractory bricks, which has at least one, preferably a plurality, of passage ducts or ducts connected in line with a feed line for purge gas.
  • a preferred embodiment is characterized in that a rinsing plate is formed from two sheet metal plates which are spaced apart by spacer ribs, the cavities between the spacer ribs and the sheet metal plates being slit-shaped form passage channels which are connected by a distributor, which is fed by a purge gas and is provided at one end of the purge plate and into which the feed line opens.
  • the distributor of the flushing plate is expediently formed by a tube provided with a slot in the longitudinal direction, which extends transversely to the through-channels, and the sheet metal plates are connected in a gastight manner to the edges of the slot, thereby making the flushing plate particularly easy to manufacture.
  • the through-channels have a maximum dimension of 1.5 mm in the direction of the thickness of the flushing plates.
  • the extension of a flushing plate directed in the longitudinal direction of the through-channels corresponds to the height of the refractory wear lining of the metallurgical vessel, and the distributor of the flushing plate is arranged in the permanent lining of the metallurgical vessel behind it, so that even if the wear lining, e.g. at the end of a crucible trip, gas flushing can be carried out in a flawless manner.
  • the shape of the flushing plate suitably corresponds to the contour of the adjacent, adjacent side surfaces of the refractory bricks. This measure makes the installation of a flushing plate particularly easy.
  • the cross section of the through-channels is expediently constant over the entire extension of the flushing plate directed in the longitudinal direction of the through-channels, so that even when the length of the flushing plate is different Width of the same - i.e. when installing between conical, refractory bricks, so-called transverse arches or spherical arches - even after the rinsing plate has burned down due to wear on the wear lining, a constant amount of gas per unit time can be fed into the interior of the metallurgical vessel.
  • a preferred embodiment is characterized in that when the stones are staggered in adjacent rows, the washing plates are each arranged in a predetermined transverse joint in a row, which makes it possible to provide a washing plate without special structural measures and without increasing the distance between the rows of refractory stones .
  • the rinsing plate is preferably welded gas-tight at the edges.
  • each flushing plate is expediently controllable.
  • the flushing plate is formed by tubes arranged next to one another, all of which open in a gas-tight manner and are fastened to a distributor connected to the feed line.
  • a particularly easy to manufacture embodiment is characterized in that the tubes are flattened from their free ends to just before their ends opening into the distributor, and the tubes are fastened to the distributor with their undeformed ends at an axial distance which is approximately the larger diameter of the flattened one Part of each tube corresponds, with the flat sides of the flattened parts of the tubes lying in approximately one plane.
  • FIG. 1 shows a longitudinal section through a steelworks converter
  • FIG. 2 shows a section along the line II-II of FIG. 1
  • FIG. 3 shows a plan view of the bottom of the in the 1 and 2 show the steel mill converter.
  • Fig. 4 illustrates a flushing plate in longitudinal section, which is guided parallel to the level of the flushing plate
  • Fig. 5 shows a section along the line VV of Fig. 4
  • Fig. 6 shows a section along the line VI-VI of Fig. 4.
  • FIGS. 7 and 8 shows a further preferred embodiment in representations analogous to FIGS. 4, 5 and 6.
  • the steelwork converter shown in FIG. 1 has a metal outer jacket 1, which is provided with a permanent lining 4 on the inside both on the bottom 2 and on the side walls 3.
  • a wear lining 7 On the permanent lining, which is formed from refractory bricks 5, a wear lining 7, also made from refractory bricks 6, is bricked up.
  • the refractory bricks 6 of the wear lining 7 are arranged in rows 10 starting from the center 8 of the base 2 or the longitudinal axis 9 of the converter, rows 10 parallel to one another with longitudinal joints 11 and the bricks 6 being adjacent Rows 10 are arranged offset from one another.
  • the adjacent stones 6 of each row form in the Longitudinal joints 11 between adjacent rows 10 and transverse joints 12 each abutting a side surface of a stone of an adjacent row 10.
  • a flushing plate 14 is used in transverse joints 12, the total thickness 15 of which, that is, transversely to the plane of the Transverse joint 12 directional dimension is very small, so that there is only a slight displacement of the stones 6 of a row 10 by the flushing plate 14, which can be compensated for by the ramming mass 16 introduced between the bottom 2 and the side wall 3 of the converter.
  • Each washing plate 14 is formed by two mutually parallel sheet metal plates 17, which are kept at a distance 20 from one another by spacing ribs 19 extending over the length 18 of the washing plate 14. At the longitudinal side edges 21, the sheet metal plates 17 are welded together in a gas-tight manner.
  • the through channels 22 are slit-shaped, i.e. they have only a very small dimension 20, preferably a dimension less than or equal to 1.5 mm, in the direction of the thickness 15 of the flushing plate 14, but a larger dimension 24, preferably a dimension between 5 and 25 mm, in the direction of the width 23 of the flushing plate 14 Dimension on.
  • the thickness 25 of the sheet metal plates is approximately 2.5 mm, it is preferably between 1.5 and 4.5 mm.
  • the rinsing plate thus has a total thickness 15, which is between 4 and max. 10.5 mm.
  • the flushing plate 14 is provided with a distributor 28 which is formed by a tube 30 provided with a slot 29 in the longitudinal direction.
  • the two interconnected sheet metal plates 17 are inserted into this slot 29 and welded gas-tight to the edges of the slot 29.
  • the tube 30 which forms the distributor and is closed at the end thus extends transversely to the longitudinal direction of the through-channels 22.
  • a further tube 31 which forms the feed line is welded into the distributor and is guided to the outside through an opening 32 in the converter jacket.
  • the feed lines 31 guided through the converter support pins each advantageously have their own fixed control valves 33, which makes it possible to supply each flushing plate 14 with flushing gas separately and independently of the other flushing plates 14.
  • each rinse plate 14 i.e. the extension of the flushing plate 14 directed in the longitudinal direction of the through channels 22 corresponds to the height 34 of the stones 6 forming the wear lining, etc. both during the new delivery and as a result of the erosion of the flushing plate, which progresses with the wear of the wear lining 7, during operation.
  • the distributor 28 is in the permanent feed 4, etc. in a cavity which is filled with ramming compound 16.
  • the width 23 and length 18 of the flushing plate 14 preferably correspond exactly to the adjacent adjacent side surfaces of the refractory bricks 6 forming a transverse joint 12, so that after inserting a flushing plate 14 into a transverse joint 12 there is no free space between the stones 6. If the adjacent side surfaces of the stones have a conical, ie trapezoidal shape, then the flush plate is expedient of the same shape. In this case it is possible to dimension the channels with a smallest cross-section at the outlet openings and a largest cross-section at the distributor, but it is necessary to keep the flushing gas quantity constant when the flushing plate-14 burns off by means of the control valves 33 as a function of this Burn or to regulate depending on the wear of the wear lining 7. In order to avoid this, it is also possible to dimension the spacer ribs in such a way that the cross section of the through channels is constant over the length 18 of the flushing plate 14.
  • the rinsing plate 14 is formed by tubes 35 with a circular cylindrical cross section, the outer diameter of which is approximately 6 mm, arranged closely next to one another.
  • the tubes which can also have a different cross-section deviating from a circular cross-section, open into a distributor 36, for example with a square cross-section, to which they are connected by means of weld seams 37.
  • the tubes are expediently welded to the distributor 36 in order to achieve absolute tightness both from the outside and from the inside. It is not necessary to weld the tubes to one another at the mutually contacting jacket generators 38.
  • the cross section of the flushing plate through which the flushing gas flows can be adapted to the requirements by selecting a specific ratio of the outside diameter to the inside diameter of each tube 35.
  • the rinsing plate 14 is formed by tubes 39 arranged next to one another, the tubes over part 40 of their length, etc. from their free ends 41 to just before their ends 42 which open into the distributor 36 flattened, e.g. B. flat rolled or squeezed.
  • the tubes 39 are attached to the distributor in such a way that the narrow sides 43 of adjacent tubes touch, the flat sides 44 of the tubes 39 lying approximately in one plane.
  • the undeformed parts 45 of the pipes 39 which have a circular cross section with a diameter of about 10 mm, are inserted into the distributor and are therefore at a distance 46 from one another, so that the weld seams 47 connecting the pipes 39 to the distributor 36 can be carried out in a simple manner and without hindrance the neighboring tubes 39 can be produced. It is thus possible to produce gas-tight weld seams from the outside solely by welding the pipes 39 to the distributor 36; there is no need to weld the pipes 39 to the distributor 36 from the inside of the distributor 36. A welding of the contacting narrow sides 43 of the flat-rolled parts 40 of the tubes 39 is not necessary.
  • a flushing plate 14 does not necessarily have to extend over the entire width of a transverse joint 12, but it can also e.g. extend only over the half thereof, two flush plates 14 then being provided side by side and with their edges 21 abutting against each other each transverse joint 12. Furthermore, it is possible to reduce the number of feed lines 31, the flush plates with such a width 23 that they extend across two rows of refractory bricks. If the stone arrangement is offset, a stone in a row must be split to form a corresponding wide transverse joint.
  • the flushing plate 14 is preferably made from conventional mild steel of medium strength. However, it is also possible to manufacture the flushing plate from heat-resistant steel for special areas of application.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP85890007A 1984-03-15 1985-01-14 Dispositif de rinçage pour un récipient métallurgique Withdrawn EP0155255A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0086584A AT382889B (de) 1984-03-15 1984-03-15 Spueleinrichtung fuer ein metallurgisches gefaess
AT865/84 1984-03-15

Publications (2)

Publication Number Publication Date
EP0155255A2 true EP0155255A2 (fr) 1985-09-18
EP0155255A3 EP0155255A3 (fr) 1986-07-16

Family

ID=3501593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85890007A Withdrawn EP0155255A3 (fr) 1984-03-15 1985-01-14 Dispositif de rinçage pour un récipient métallurgique

Country Status (7)

Country Link
US (1) US4565355A (fr)
EP (1) EP0155255A3 (fr)
JP (1) JPS60211008A (fr)
AT (1) AT382889B (fr)
ES (1) ES541127A0 (fr)
PT (1) PT80089B (fr)
ZA (1) ZA85544B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0239152A1 (fr) * 1986-03-10 1987-09-30 Hoogovens Groep B.V. Système d'alimentation en gaz d'un convertisseur pour la fabrication d'acier
EP0232244A3 (en) * 1986-02-03 1988-04-06 Aktiengesellschaft Voest-Alpine Flushing arrangement for a metallurgical vessel
EP0403466A3 (fr) * 1989-06-13 1991-12-18 VOEST-ALPINE Industrieanlagenbau GmbH Installation de lavage pour un récipient métallurgique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4741515A (en) * 1986-10-20 1988-05-03 Bethlehem Steel Corporation Apparatus for introducing gas into a metallurgical vessel
CN102417947A (zh) * 2011-12-12 2012-04-18 莱芜钢铁股份有限公司 可拆卸炉底及包括该可拆卸炉底的顶底复吹转炉

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA849446A (en) * 1970-08-18 Centre National De Recherches Metallurgiques Method and device for treating liquid metal in the ladle
NL296346A (fr) * 1962-08-07
FR2455008A1 (fr) * 1979-04-25 1980-11-21 Siderurgie Fse Inst Rech Piece refractaire a permeabilite selective et orientee pour l'insufflation d'un fluide
SU865524A1 (ru) * 1979-05-07 1981-09-23 За витель / А. Лабунович, Н. Ф. Кравцов/ В. К. Батлук В. Ф. Кресть нинов Огнеупорна газопроницаема кладка
LU82069A1 (fr) * 1980-01-09 1981-09-10 Arbed Procede d'affinage d'un bain de metal
JPS5927363B2 (ja) * 1980-06-20 1984-07-05 住友金属工業株式会社 溶融金属精錬用羽口
CS241483B2 (en) * 1980-06-25 1986-03-13 Arbed Refractory building body
LU82597A1 (de) * 1980-07-09 1982-02-17 Arbed Feuerfester,gasdurchlaessiger baukoerper
FR2495187A1 (fr) * 1980-12-02 1982-06-04 Siderurgie Fse Inst Rech Procede de realisation de fonds de recipients metallurgiques
FR2504664A1 (fr) * 1981-04-24 1982-10-29 Francais Aciers Speciaux Dispositif de soufflage de gaz de brassage dans un convertisseur d'affinage des metaux
BE892182A (fr) * 1982-02-17 1982-06-16 Centre Rech Metallurgique Perfectionnements aux procedes de brassage d'un bain de metal
LU84167A1 (de) * 1982-05-25 1983-11-23 Arbed Feuerfeste,gasdurchlaessige baukoerper
US4396179A (en) * 1982-05-28 1983-08-02 Labate M D Device for introducing gas into molten metal

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0232244A3 (en) * 1986-02-03 1988-04-06 Aktiengesellschaft Voest-Alpine Flushing arrangement for a metallurgical vessel
US4744546A (en) * 1986-02-03 1988-05-17 Voest-Alpine Aktiengesellschaft Flushing arrangement for a metallurgical vessel
AU599949B2 (en) * 1986-02-03 1990-08-02 Voest-Alpine Industrieanlagenbau Gesellschaft Mbh A flushing arrangement for a metallurgical vessel
EP0239152A1 (fr) * 1986-03-10 1987-09-30 Hoogovens Groep B.V. Système d'alimentation en gaz d'un convertisseur pour la fabrication d'acier
AU581562B2 (en) * 1986-03-10 1989-02-23 Hoogovens Groep Bv Converter for preparing steel and a gas supply devicefor such a converter
EP0403466A3 (fr) * 1989-06-13 1991-12-18 VOEST-ALPINE Industrieanlagenbau GmbH Installation de lavage pour un récipient métallurgique

Also Published As

Publication number Publication date
JPS60211008A (ja) 1985-10-23
PT80089A (en) 1985-04-01
ATA86584A (de) 1986-09-15
ES8603584A1 (es) 1985-12-16
PT80089B (en) 1986-10-28
AT382889B (de) 1987-04-27
US4565355A (en) 1986-01-21
ES541127A0 (es) 1985-12-16
EP0155255A3 (fr) 1986-07-16
JPS6326168B2 (fr) 1988-05-28
ZA85544B (en) 1985-08-28

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