EP0093039A1 - Verfahren zur Erhöhung der Gasdurchlässigkeit von feuerfesten Elementen im Boden von metallurgischen Gefässen sowie hierfür geeignetes Material - Google Patents

Verfahren zur Erhöhung der Gasdurchlässigkeit von feuerfesten Elementen im Boden von metallurgischen Gefässen sowie hierfür geeignetes Material Download PDF

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Publication number
EP0093039A1
EP0093039A1 EP83400765A EP83400765A EP0093039A1 EP 0093039 A1 EP0093039 A1 EP 0093039A1 EP 83400765 A EP83400765 A EP 83400765A EP 83400765 A EP83400765 A EP 83400765A EP 0093039 A1 EP0093039 A1 EP 0093039A1
Authority
EP
European Patent Office
Prior art keywords
concrete
container
refractory
elements
ensure
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
EP83400765A
Other languages
English (en)
French (fr)
Other versions
EP0093039B1 (de
Inventor
Guy Denier
Romain Henrion
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 AT83400765T priority Critical patent/ATE34774T1/de
Publication of EP0093039A1 publication Critical patent/EP0093039A1/de
Application granted granted Critical
Publication of EP0093039B1 publication Critical patent/EP0093039B1/de
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/42Constructional features of converters
    • C21C5/44Refractory linings
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/30Regulating or controlling the blowing
    • C21C5/35Blowing from above and through the bath
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/16Making or repairing linings increasing the durability of linings or breaking away linings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/0003Linings or walls
    • F27D1/003Linings or walls comprising porous bricks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00Charging; Discharging; Manipulation of charge
    • F27D3/16Introducing a fluid jet or current into the charge
    • F27D2003/161Introducing a fluid jet or current into the charge through a porous element
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27MINDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2003/00Type of treatment of the charge
    • F27M2003/02Preheating, e.g. in a laminating line
    • F27M2003/025Drying

Definitions

  • the present invention relates to the field of the production of metals, in particular steel. It relates more precisely to metallurgical vessels, particularly refining converters, the bottom of which is provided with permeable refractory elements.
  • Metallurgical treatments consist in subjecting a bath of molten metal to pneumatic stirring by controlled injection of a stirring fluid, usually an inert gas such as nitrogen or argon, through permeable refractory elements. incorporated into the usual refractory lining of the container containing the bath and opening below the surface of the latter. More generally, these blowing elements are housed in the bottom of the container (FR-A-2,322,202, US No. 3,259,484).
  • a stirring fluid usually an inert gas such as nitrogen or argon
  • the subject of the invention is a treatment method for improving the permeability of the bottoms of metallurgical vessels, in particular steel converters with top blowing oxygen blowing, said bottoms being provided with permeable refractory elements for the controlled introduction of a stirring fluid into the bath of molten metal contained in the container, process characterized in that, after emptying the container of its content at the end of the refining of any load, a concrete of refractory material compatible with the refractory material constituting the bottom is deposited in the bottom, said concrete having sufficient fluidity to ensure its spread over the bottom; and in that the concrete is left to dry and ensure its setting, while maintaining in the permeable refractory elements a sufficient pressure to provide a permanent flow of mixing fluid.
  • well cast refractory concrete is prepared, capable of reaching the bottom of the container from the spout by flowing along the side wall; this concrete is poured into the container through the spout, the container being in an inclined position, for example in an intermediate position between the upright position and the completely tilted position which it presents at the end of casting of the molten metal, then it is straightened to vertical to ensure the distribution of the concrete on the bottom and the concrete is allowed to dry and ensure its setting, while maintaining in the permeable refractory elements a sufficient pressure to ensure a flow of mixing fluid.
  • the container can be tilted on either side of its vertical position to perfect the spreading of the concrete on the bottom.
  • the metallurgical container is a refining converter for oxygen blown from above by means of an upright vertical lance, it being understood that the invention also applies to any other metallurgical container, for example, pockets or arc furnaces.
  • a concrete of refractory material compatible with the refractory material constituting the bottom is intended to denote any refractory material capable, taking into account the nature of the bottom, of sticking to the latter during its solidification. It is for example a magnesian concrete if the bottom has a predominance in magnesia, or a dolomitic concrete if the bottom is based on dolomite, etc ...
  • well pourable refractory concrete is meant to qualify a preparation of the latter which makes it more fluid than the fluidity which would result from a preparation in accordance with the prescriptions of the concrete manufacturer.
  • this concrete is generally a question of making this concrete very moist, that is to say containing an excess of water compared to the usual prescriptions so as to achieve a content of the order of 10% by weight.
  • the lower limit of the humidity rate to be adopted must take into account the capacity, that is to say the size of the container, in particular its height and the diameter of the bottom, as well as its thermal mass, so that the concrete can, by being introduced by the upper open end (the spout) reach the bottom, then once the bottom is reached, spread there before solidifying.
  • the water content is preferably between 8 and 10% by weight, that is to say 1 to 2 points more than that that the manufacturer recommends as much as possible (up to 7 ⁇ , but more generally between 3 and 6%).
  • the method according to the invention is simple, inexpensive, and poses no uncontrolled difficulty.
  • the presence of elé permeable refractory elements housed in the bottom does not imply any other requirement during the drying of the concrete than that which consists in maintaining through them a minimum flow of mixing fluid, a flow which can be described as "safety”.
  • the concrete is in mechanical engagement on the bottom and forms a refractory layer which can reach in the central area, an average thickness of between 5 and 20 cm approximately (240 t converter).
  • the converter is then ready for processing new loads. It is noted from the first treated load that, not only is the permeability of the bottom preserved, but that it has also very significantly increased compared to the level it had before the concrete was added.
  • a possible indicator of the "level" of permeability can be constituted by the pressure / flow ratio of stirring fluid in the supply line of the latter to the permeable refractory element. This ratio can be determined from a reference value, the permeable element being taken in new condition with vacuum blowing or during the refining of the first charge to the converter.
  • the mixing fluid being able to circulate on the one hand laterally in areas of lesser pressure drop which possibly form at the interface of the deposited concrete layer and the pre-existing refractory bottom.
  • the technique according to the invention can be implemented at any time, both between two refining campaigns, and between two charges of the same campaign, or even before the first charge, on a converter in the state new.
  • the invention applies whatever the type of permeable refractory elements mounted in the bottom. It should be emphasized, however, that excellent results have been obtained with elements such as those mentioned at the start, and of which one can have more knowledge by referring to the detailed description which is made of it in the European patent application n ° 0021861 already cited.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Ceramic Products (AREA)
EP83400765A 1982-04-22 1983-04-18 Verfahren zur Erhöhung der Gasdurchlässigkeit von feuerfesten Elementen im Boden von metallurgischen Gefässen sowie hierfür geeignetes Material Expired EP0093039B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83400765T ATE34774T1 (de) 1982-04-22 1983-04-18 Verfahren zur erhoehung der gasdurchlaessigkeit von feuerfesten elementen im boden von metallurgischen gefaessen sowie hierfuer geeignetes material.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8207117A FR2525632A1 (fr) 1982-04-22 1982-04-22 Procede de traitement pour ameliorer la permeabilite des fonds de recipients metallurgiques pourvus d'elements refractaires permeables, et materiaux pour sa mise en oeuvre
FR8207117 1982-04-22

Publications (2)

Publication Number Publication Date
EP0093039A1 true EP0093039A1 (de) 1983-11-02
EP0093039B1 EP0093039B1 (de) 1988-06-01

Family

ID=9273359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400765A Expired EP0093039B1 (de) 1982-04-22 1983-04-18 Verfahren zur Erhöhung der Gasdurchlässigkeit von feuerfesten Elementen im Boden von metallurgischen Gefässen sowie hierfür geeignetes Material

Country Status (14)

Country Link
US (2) US4696456A (de)
EP (1) EP0093039B1 (de)
JP (1) JPS59104418A (de)
KR (1) KR910003514B1 (de)
AT (1) ATE34774T1 (de)
BE (1) BE896538A (de)
BR (1) BR8302046A (de)
CA (1) CA1206007A (de)
DE (1) DE3376850D1 (de)
ES (2) ES8402617A1 (de)
FR (1) FR2525632A1 (de)
IT (1) IT1194213B (de)
LU (1) LU84741A1 (de)
ZA (1) ZA832761B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525632A1 (fr) * 1982-04-22 1983-10-28 Siderurgie Fse Inst Rech Procede de traitement pour ameliorer la permeabilite des fonds de recipients metallurgiques pourvus d'elements refractaires permeables, et materiaux pour sa mise en oeuvre
DE4221101C2 (de) * 1992-06-26 1994-05-05 Veitsch Radex Ag Verwendung einer feuerfesten keramischen Masse zur Auskleidung von Böden an Elektro-Lichtbogenöfen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259484A (en) * 1962-04-16 1966-07-05 Loire Atel Forges Method and apparatus for producing steel from pig iron
DE2100847A1 (en) * 1970-01-15 1971-07-22 Bate M Coating the insides of metallurgical fur-naces
FR2322202A1 (fr) * 1975-08-29 1977-03-25 Siderurgie Fse Inst Rech Procede d'elaboration d'acier par soufflage d'oxygene
DE2912771A1 (de) * 1979-03-30 1980-10-09 Stahl Consulting Gmbh Verfahren zum trocken-spritzauskleiden
EP0021861A1 (de) * 1979-04-25 1981-01-07 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Gasdurchlässiger Körper aus feuerfestem Material und Verfahren zu seiner Herstellung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT977989B (it) * 1972-01-03 1974-09-20 Uss Eng & Consult Metodo per la preparazione di una suola amovibile colata per un for no usato nella produzione di ac ciaio
NL176088B (nl) * 1978-07-14 1984-09-17 Estel Hoogovens Bv Werkwijze voor het bedrijven van een staalconverter en een staalconverter te gebruiken hierbij.
JPS5585618A (en) * 1978-12-22 1980-06-27 Kawasaki Heavy Ind Ltd Coating method for converter with refractory material
US4298378A (en) * 1978-12-22 1981-11-03 Kawasaki Jukogyo Kabushiki Kaisha Rotary steel converter, method of making steel there-with and method of applying refractory lining to converter
FR2525632A1 (fr) * 1982-04-22 1983-10-28 Siderurgie Fse Inst Rech Procede de traitement pour ameliorer la permeabilite des fonds de recipients metallurgiques pourvus d'elements refractaires permeables, et materiaux pour sa mise en oeuvre

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259484A (en) * 1962-04-16 1966-07-05 Loire Atel Forges Method and apparatus for producing steel from pig iron
DE2100847A1 (en) * 1970-01-15 1971-07-22 Bate M Coating the insides of metallurgical fur-naces
FR2322202A1 (fr) * 1975-08-29 1977-03-25 Siderurgie Fse Inst Rech Procede d'elaboration d'acier par soufflage d'oxygene
DE2912771A1 (de) * 1979-03-30 1980-10-09 Stahl Consulting Gmbh Verfahren zum trocken-spritzauskleiden
EP0021861A1 (de) * 1979-04-25 1981-01-07 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Gasdurchlässiger Körper aus feuerfestem Material und Verfahren zu seiner Herstellung

Also Published As

Publication number Publication date
ES8402616A1 (es) 1984-02-01
KR840004455A (ko) 1984-10-15
BE896538A (fr) 1983-08-16
BR8302046A (pt) 1983-12-27
ES521716A0 (es) 1984-02-01
IT1194213B (it) 1988-09-14
CA1206007A (fr) 1986-06-17
FR2525632A1 (fr) 1983-10-28
KR910003514B1 (ko) 1991-06-03
FR2525632B1 (de) 1984-08-24
EP0093039B1 (de) 1988-06-01
ATE34774T1 (de) 1988-06-15
ES8402617A1 (es) 1984-02-01
ES521715A0 (es) 1984-02-01
JPH0368925B2 (de) 1991-10-30
LU84741A1 (fr) 1983-12-05
US4696456A (en) 1987-09-29
US4779846A (en) 1988-10-25
ZA832761B (en) 1983-12-28
DE3376850D1 (en) 1988-07-07
IT8320767A0 (it) 1983-04-22
JPS59104418A (ja) 1984-06-16
IT8320767A1 (it) 1984-10-22

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