EP0095436B1 - Feuerfeste, gasdurchlässige Baukörper - Google Patents

Feuerfeste, gasdurchlässige Baukörper Download PDF

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Publication number
EP0095436B1
EP0095436B1 EP83630093A EP83630093A EP0095436B1 EP 0095436 B1 EP0095436 B1 EP 0095436B1 EP 83630093 A EP83630093 A EP 83630093A EP 83630093 A EP83630093 A EP 83630093A EP 0095436 B1 EP0095436 B1 EP 0095436B1
Authority
EP
European Patent Office
Prior art keywords
gas
refractory
metal
unit
elements
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
Application number
EP83630093A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0095436A1 (de
Inventor
François Schleimer
Guy Denier
Romain Henrion
Jean Goedert
Ferdinand Goedert
Henri Klein
Josef Auer
Berndt Wendl
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Arcelor Luxembourg SA
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
Arbed SA
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 Institut de Recherches de la Siderurgie Francaise IRSID, Arbed SA filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to AT83630093T priority Critical patent/ATE23196T1/de
Publication of EP0095436A1 publication Critical patent/EP0095436A1/de
Application granted granted Critical
Publication of EP0095436B1 publication Critical patent/EP0095436B1/de
Expired 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 invention relates to refractory, gas-permeable structures for blowing gases into metal treatment vessels, through the lining thereof.
  • the oxygen blowing process used for fresh iron refreshing has recently been improved in terms of metallurgy in such a way that secondary gases, such as nitrogen or argon, are blown in in a controlled manner through the converter base. Also in oxygen bottom blowing processes and in metal treatment vessels, such as oven pans, desulfurization pans and the like. , the blowing of gases into the metal bath through the vessel bottom or the lining of the vessel walls can be considered.
  • the gas-permeable bricks to be inserted into the lining of the vessel are required to have a durability which corresponds to that of the other refractory lining, since it is difficult to replace worn-out gas blowing stones when hot.
  • the gas introduction should be possible both continuously and in particular discontinuously, i.e. the vessel should also be able to be operated without the introduction of gas, and the stones should be permeable to gas in an unchanged manner after the gas supply has been switched on again.
  • the gas permeability of the stones over their service life i.e. over an entire kiln trip, remain essentially the same.
  • patent application LU 81 208 the applicant has shown a device for blowing a treatment gas into a metal bath which is intended for insertion into the bottom of a metal treatment vessel and which has good durability and permits the blowing in of the desired amounts of gas.
  • This device essentially consists of a refractory, gas-permeable structure, wherein a plurality of flat, corrugated, tubular or wire-shaped metallic separating members of small wall thickness are embedded in the refractory material in the axial direction.
  • this structure consists of steel sheets and segments or strips of refractory material in an alternating arrangement.
  • the applicant has improved the refractory structures to the effect that the segments are produced in molds, with metal layers being pressed with the refractory material.
  • the adjacent longitudinal surfaces of the segments can be smooth or with a profiled, z. B. corrugated or grooved surface.
  • the object of the invention is to propose fireproof, gas-permeable structures consisting of segments, the segments of which do not react significantly with the flushing gas used, which can sometimes have an oxidizing effect.
  • the structure according to the invention consequently allows any gas to be blown into the converter which, at its normal operating temperature, does not enter into any connections with the selected coating.
  • the exact composition and grain structure of the refractory mass are of minor importance.
  • refractory material primarily gives the coating a hold and also prevents it from overheating by dissipating the heat to the cold side of the structure.
  • One of the most important properties of the refractory material is a low or coated expansion coefficient to prevent premature cracking to avoid formation in the building.
  • Suitable refractory materials are, for example, tar-bound sintered magnesia, high-alumina material or mixtures of magnesia and chrome ore.
  • FIGS. 2 to 6 show perspective sections through individual segments according to the invention.
  • the structure 1 shown in FIG. 1 has a metal housing 10 constructed from welded plates, which surrounds a total of twelve segments 3. Each segment is provided with metal supports 4, 4a on all four long sides. The sheets are corrugated on two long sides, while the sheets on the other two sides are flat. The segments are installed in such a way that a corrugated sheet 4a is in contact with a flat sheet 4. In order to prevent the metal housing from inflating, the plates of the metal housing 10 should preferably not have any corrugated metal sheets opposite them. A sheet metal plate 5 may possibly be inserted between the two rows of the segments 3, along which a gas passage takes place along as well as along the metal supports 4, 4a of the segments 3.
  • the segments are spaced from the end face of the metal housing by means of two strips 6, which are arranged on the inside of the metal housing 10 and are preferably attached to it by spot welding.
  • an end plate 7 is welded tight, which is provided with a pipe connection 8.
  • the space that remains free between the end plate and the end faces of the segments 3 is the distribution space for the gas.
  • the refractory mass 9 is provided on the cold end face of the segments 3 with a protective sheet (not shown).
  • the opposite, invisible side represents the fire side of the building and can be closed with a cover plate.
  • the latter is used if the infeed of the metal treatment vessel surrounding the structure contains tar or similar carbon carriers. It then serves to prevent the penetration of tar or the like into the gas passage joints of the structure or the sticking of the same during the heating of the vessel.
  • the cover plate melts at the start of operation and releases the joints.
  • only three elongated cuboid segments 3 are arranged one above the other in the metal housing 10.
  • the five sheets that surround one of the segments are all flat here, while in the two remaining segments only one large long side is provided with a corrugated sheet and the other three long sides (as well as the cold side) have flat sheets.
  • the three segments are arranged in the metal housing in such a way that no corrugated metal is in contact with it.
  • FIG. 2 shows a section through a segment 23, the refractory mass 29 of which is surrounded on all four sides and the cold end face (not shown) with flat steel sheets 24.
  • the flat sheets are provided with longitudinal metal strips 22, the strips being staggered on two opposite sides.
  • the strips 22 can be attached to the sheet by spot welding. The thickness of these strips allows the degree of gas permeability to be varied. However, the strips must not be chosen too thick in order to be able to operate the building without gas supply. Some metal penetrates the narrow gap between the segments; when the gas supply line is switched on again, this penetrated metal is flushed out of the building and the original gas permeability is restored. This surprising effect only occurs if the metal strips are not too thick.
  • the refractory mass 39 is surrounded by sheets 34 which are provided with longitudinal bars 32.
  • the longitudinal bars are staggered on opposing sheets. The bars can be easily rolled into the sheet.
  • FIG. 4 shows a segment 43, the refractory mass 49 of which is surrounded on all sides with steel sheets 44.
  • the gas throughput occurs primarily through grooves 42 milled into the sheet 44.
  • the refractory mass 59 is surrounded on all sides by flat sheets 54.
  • the distance between two segments is set by means of a mat-like structure 52 made of steel wool.
  • steel sheet is used as the coating of the refractory mass.
  • the sheet is rolled into the required shape, cut to size, bent and welded.
  • FIG. 6 Refractory material is first introduced into a press mold.
  • the mold provides the refractory material with bars, grooves or waves.
  • the elongated cuboid elements are painted.
  • the liquid used can be, for example, a metal paint with a ceramic binding material or a ceramic paint.
  • the two segments 63 shown in FIG. 6 have a coating 64 which was produced by immersing the corrugated refractory material 69 in a metal paint bath. After immersion, the segments are annealed depending on the selected metal color. It may be necessary to repeat the immersion annealing process several times until the desired thickness of the coating is reached.

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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)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP83630093A 1982-05-25 1983-05-20 Feuerfeste, gasdurchlässige Baukörper Expired EP0095436B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83630093T ATE23196T1 (de) 1982-05-25 1983-05-20 Feuerfeste, gasdurchlaessige baukoerper.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84167 1982-05-25
LU84167A LU84167A1 (de) 1982-05-25 1982-05-25 Feuerfeste,gasdurchlaessige baukoerper

Publications (2)

Publication Number Publication Date
EP0095436A1 EP0095436A1 (de) 1983-11-30
EP0095436B1 true EP0095436B1 (de) 1986-10-29

Family

ID=19729884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83630093A Expired EP0095436B1 (de) 1982-05-25 1983-05-20 Feuerfeste, gasdurchlässige Baukörper

Country Status (15)

Country Link
EP (1) EP0095436B1 (pt)
JP (2) JPS58210113A (pt)
KR (1) KR910009493B1 (pt)
AR (1) AR229811A1 (pt)
AT (1) ATE23196T1 (pt)
AU (1) AU557537B2 (pt)
BR (1) BR8302619A (pt)
CA (1) CA1229228A (pt)
DE (1) DE3367257D1 (pt)
ES (1) ES522666A0 (pt)
IN (1) IN157467B (pt)
LU (1) LU84167A1 (pt)
MX (1) MX158037A (pt)
PT (1) PT76732B (pt)
ZA (1) ZA833627B (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU85131A1 (de) * 1983-12-12 1985-09-12 Arbed Gasdurchlaessiger baukoerper aus feuerfestem material
DE59103723D1 (de) * 1990-09-08 1995-01-12 Veitsch Radex Ag Spülstein zum durchleiten von gasen und/oder feststoffen in die schmelze eines metallurgischen gefässes sowie verfahren zu seiner herstellung.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
LU82552A1 (de) * 1980-06-25 1982-01-20 Arbed Feuerfester,gasdurchlaessiger baukoerper
CS241483B2 (en) * 1980-06-25 1986-03-13 Arbed Refractory building body

Also Published As

Publication number Publication date
BR8302619A (pt) 1983-12-13
ES8404414A1 (es) 1984-04-16
JPS58210113A (ja) 1983-12-07
MX158037A (es) 1988-12-28
IN157467B (pt) 1986-04-05
AU1493183A (en) 1983-12-01
DE3367257D1 (en) 1986-12-04
AU557537B2 (en) 1986-12-24
KR840004787A (ko) 1984-10-24
ATE23196T1 (de) 1986-11-15
ES522666A0 (es) 1984-04-16
ZA833627B (en) 1984-02-29
AR229811A1 (es) 1983-11-30
JPH0744041U (ja) 1995-10-24
EP0095436A1 (de) 1983-11-30
PT76732B (de) 1986-01-27
CA1229228A (en) 1987-11-17
KR910009493B1 (ko) 1991-11-19
LU84167A1 (de) 1983-11-23
PT76732A (de) 1983-06-01

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