EP0093040A1 - Verfahren zur Verlängerung der Haltbarkeit feuerfester gasdurchlässiger Elemente im Boden metallurgischer Gefässe, insbesondere bei Sauerstoffaufblaskonvertern für Stahl - Google Patents
Verfahren zur Verlängerung der Haltbarkeit feuerfester gasdurchlässiger Elemente im Boden metallurgischer Gefässe, insbesondere bei Sauerstoffaufblaskonvertern für Stahl Download PDFInfo
- Publication number
- EP0093040A1 EP0093040A1 EP83400766A EP83400766A EP0093040A1 EP 0093040 A1 EP0093040 A1 EP 0093040A1 EP 83400766 A EP83400766 A EP 83400766A EP 83400766 A EP83400766 A EP 83400766A EP 0093040 A1 EP0093040 A1 EP 0093040A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slag
- converter
- elements
- fluid
- permeable refractory
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000001301 oxygen Substances 0.000 title claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 10
- 230000008569 process Effects 0.000 title claims description 6
- 239000002893 slag Substances 0.000 claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 238000007670 refining Methods 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 238000007664 blowing Methods 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 2
- 230000005070 ripening Effects 0.000 claims description 2
- 239000002562 thickening agent Substances 0.000 claims description 2
- 239000012749 thinning agent Substances 0.000 claims description 2
- 230000035699 permeability Effects 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 230000007480 spreading Effects 0.000 abstract description 3
- 238000003892 spreading Methods 0.000 abstract description 3
- 230000008021 deposition Effects 0.000 abstract 1
- 238000005058 metal casting Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011823 monolithic refractory Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
-
- 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
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
-
- 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
- C21C5/36—Processes yielding slags of special composition
-
- 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
- C21C5/44—Refractory linings
-
- 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
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
-
- 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
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/003—Linings or walls comprising porous bricks
-
- 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
- F27D2003/161—Introducing a fluid jet or current into the charge through a porous element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/02—Preheating, e.g. in a laminating line
- F27M2003/025—Drying
Definitions
- the present invention relates to the field of the production of metals, in particular steel. More specifically, it relates to metallurgical refining vessels, in particular steel refinery converters with top-blown oxygen blowing, the bottom of which is provided with permeable refractory elements.
- metallurgical treatments which consist in subjecting a bath of molten metal to a pneumatic stirring by controlled injection of a stirring fluid, usually an inert gas such as nitrogen or argon, through permeable refractory elements mounted in the usual refractory lining which forms the bottom of the container containing the bath (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 method for improving the life of the permeable refractory elements equipping the bottom of metallurgical refining vessels, in particular the converters of steelworks with oxygen blowing from above, said elements serving for the controlled injection of a stirring fluid into the molten metal bath contained in the container, process characterized in that during the refining of any charge, a fluid slag is formed which is kept then in the converter after casting the molten metal by tilting said container; in that the container is straightened in a vertical position so that the slag settles and is distributed over the bottom; and in that said slag is allowed to dry and ensure its setting while maintaining in the permeable refractory elements a sufficient pressure to ensure a permanent flow of stirring fluid.
- the metallurgical refining container is a converter of steelworks to oxygen blown from above (type LD), it being understood that the invention also applies to any metallurgical container capable of tilting around 'a horizontal axis and in which the refining operation is accompanied by the formation of a slag.
- the deposition technique according to the invention can be carried out systematically after each charge, or at least after each charge having led to exposure, even partial, of the permeable refractory elements.
- the proposed method is very simple and poses no uncontrolled difficulty. It supposes only the precaution of forming, during, or more simply at the end of refining of a charge, a slag capable, by its fluidity, of flowing along the wall of the converter, then spreading over the bottom and stick to it while hardening. In practice, this boils down to a person skilled in the art to a visual verification of the slag's ability to meet these three requirements, which is moreover intended to be designated by the expression "a fluid slag is formed" used in the above formulation of the subject of the invention.
- thinning agents such as fluorspar, or other usual flux, which lowers its melting temperature.
- thickening agents will be added to the slag, for example dolomite or any other refractory oxide or mixture of refractory oxides which is commonly used in steel works.
- the slag forms a refractory layer which subtracts the permeable elements from direct contact with the molten metal bath. Furthermore, the presence of these permeable elements at the bottom does not imply any other requirement during the hardening of the slag than that which consists in maintaining through them a low flow rate of brewing fluid, flow which can be qualified "safety" and which, moreover, does not penalize productivity in any way, since it takes place during the necessary hardening of the slag.
- the converter is ready for a new charge. It is noted from the start of the refining treatment, that not only the permeability of the bottom is preserved, but that it has even significantly increased compared to the level it had during the refining of the charges carried out without prior deposit of dairy on the bottom.
- a possible indicator of the "level" of permeability can be constituted by the pressure / flow rate ratio of fluid in the supply line of the latter to the permeable refractory element. This ratio can be determined from a reference value taken when the element is in the new state by vacuum blowing, or during the refining of the first charge to the converter.
- stirring fluid which can, for one part, circulate laterally in zones of lesser pressure drop which possibly form at the interface of the layer of slag deposited and of the pre-existing refractory bottom.
- the technique according to the invention can be implemented at any time, between any two loads of the same campaign or even at the end of the first load, on a converter in the state new.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Analytical Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT83400766T ATE33401T1 (de) | 1982-04-22 | 1983-04-18 | Verfahren zur verlaengerung der haltbarkeit feuerfester gasdurchlaessiger elemente im boden metallurgischer gefaesse, insbesondere bei sauerstoffaufblaskonvertern fuer stahl. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8207118A FR2525633A1 (fr) | 1982-04-22 | 1982-04-22 | Procede pour ameliorer la duree de vie d'elements refractaires permeables loges dans le fond des recipients metallurgiques d'affinage, notamment des convertisseurs d'acierie a soufflage d'oxygene par le haut |
| FR8207118 | 1982-04-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0093040A1 true EP0093040A1 (de) | 1983-11-02 |
| EP0093040B1 EP0093040B1 (de) | 1988-04-06 |
Family
ID=9273360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83400766A Expired EP0093040B1 (de) | 1982-04-22 | 1983-04-18 | Verfahren zur Verlängerung der Haltbarkeit feuerfester gasdurchlässiger Elemente im Boden metallurgischer Gefässe, insbesondere bei Sauerstoffaufblaskonvertern für Stahl |
Country Status (13)
| Country | Link |
|---|---|
| US (2) | US4690386A (de) |
| EP (1) | EP0093040B1 (de) |
| JP (1) | JPS5941412A (de) |
| KR (1) | KR910002863B1 (de) |
| AT (1) | ATE33401T1 (de) |
| BE (1) | BE896539A (de) |
| BR (1) | BR8302006A (de) |
| CA (1) | CA1205637A (de) |
| DE (1) | DE3376225D1 (de) |
| FR (1) | FR2525633A1 (de) |
| IT (1) | IT1194212B (de) |
| LU (1) | LU84742A1 (de) |
| ZA (1) | ZA832760B (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3936715A1 (de) * | 1989-11-03 | 1991-05-08 | Kortec Ag | Verfahren zum einbringen von fliessfaehigen zuschlagsstoffen in ein metallurgisches gefaess und gefaess fuer dieses verfahren |
| AT403291B (de) * | 1989-06-20 | 1997-12-29 | Voest Alpine Ind Anlagen | Verfahren zur erhöhung der haltbarkeit der feuerfesten auskleidung von metallurgischen gefässen |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61139534A (ja) * | 1984-12-12 | 1986-06-26 | Shin Meiwa Ind Co Ltd | 三転ダンプカ−のヒンジ切換状態表示装置 |
| JPS61139533A (ja) * | 1984-12-12 | 1986-06-26 | Shin Meiwa Ind Co Ltd | 三転ダンプカ−のヒンジ異常状態検出装置 |
| DE4003646C1 (de) * | 1990-02-07 | 1990-12-13 | Intocast Gmbh Feuerfestprodukte Und Giesshilfsmittel, 4030 Ratingen, De | |
| US5772931A (en) * | 1996-12-20 | 1998-06-30 | Dofasco Inc. | Slag coating process |
| DE19913335A1 (de) * | 1999-03-24 | 2000-09-28 | Linde Tech Gase Gmbh | Verfahren zum Beschichten der Ausmauerung eines Konverters und Beschichtung |
| KR20030003316A (ko) * | 2001-06-30 | 2003-01-10 | 백 웨인 | 다목적 이쑤시개 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE631565A (de) * | ||||
| 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 |
| DE2028578A1 (en) * | 1970-06-10 | 1971-12-16 | Nippon Kokan Kk | Preventing deterioration or destruction of - refractory bricks in steel furnaces |
| FR2322202A1 (fr) * | 1975-08-29 | 1977-03-25 | Siderurgie Fse Inst Rech | Procede d'elaboration d'acier par soufflage d'oxygene |
| EP0007657A1 (de) * | 1978-07-14 | 1980-02-06 | Hoogovens Groep B.V. | Verfahren zur Herstellung und Erhaltung eines Verschleissfutters an einem Stahlkonverter sowie mit einem solchen Futter ausgestatteter Stahlkonverter |
| 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 (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA460246A (en) * | 1949-10-11 | B. Story Edward | Lining rotary furnace | |
| DE2100874A1 (de) * | 1971-01-09 | 1972-07-20 | Kretz, Erich, 4000 Düsseldorf | Trägerrost |
| JPS5337120A (en) * | 1976-09-18 | 1978-04-06 | Nippon Steel Corp | Operating method for converter |
| 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 |
| CA1143947A (en) * | 1979-02-07 | 1983-04-05 | Jerry V. Spruell | Method for increasing vessel lining life for basic oxygen furnaces |
| JPS5938282B2 (ja) * | 1980-07-03 | 1984-09-14 | 川崎製鉄株式会社 | 底吹き転炉炉壁面へのスラグコ−テイング方法 |
| JPS5811717A (ja) * | 1981-07-15 | 1983-01-22 | Nippon Steel Corp | 多孔質スラグコ−テイングによるガス吹込孔の保護層形成方法 |
-
1982
- 1982-04-22 FR FR8207118A patent/FR2525633A1/fr active Granted
-
1983
- 1983-04-11 LU LU84742A patent/LU84742A1/fr unknown
- 1983-04-18 EP EP83400766A patent/EP0093040B1/de not_active Expired
- 1983-04-18 AT AT83400766T patent/ATE33401T1/de not_active IP Right Cessation
- 1983-04-18 DE DE8383400766T patent/DE3376225D1/de not_active Expired
- 1983-04-19 BR BR8302006A patent/BR8302006A/pt not_active IP Right Cessation
- 1983-04-19 ZA ZA832760A patent/ZA832760B/xx unknown
- 1983-04-20 US US06/486,844 patent/US4690386A/en not_active Expired - Fee Related
- 1983-04-21 BE BE6/47817A patent/BE896539A/fr not_active IP Right Cessation
- 1983-04-21 CA CA000426382A patent/CA1205637A/fr not_active Expired
- 1983-04-22 JP JP58071332A patent/JPS5941412A/ja active Pending
- 1983-04-22 KR KR1019830001714A patent/KR910002863B1/ko not_active IP Right Cessation
- 1983-04-22 IT IT20765/83A patent/IT1194212B/it active
-
1987
- 1987-04-15 US US07/038,542 patent/US4735398A/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE631565A (de) * | ||||
| 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 |
| DE2028578A1 (en) * | 1970-06-10 | 1971-12-16 | Nippon Kokan Kk | Preventing deterioration or destruction of - refractory bricks in steel furnaces |
| FR2322202A1 (fr) * | 1975-08-29 | 1977-03-25 | Siderurgie Fse Inst Rech | Procede d'elaboration d'acier par soufflage d'oxygene |
| EP0007657A1 (de) * | 1978-07-14 | 1980-02-06 | Hoogovens Groep B.V. | Verfahren zur Herstellung und Erhaltung eines Verschleissfutters an einem Stahlkonverter sowie mit einem solchen Futter ausgestatteter Stahlkonverter |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT403291B (de) * | 1989-06-20 | 1997-12-29 | Voest Alpine Ind Anlagen | Verfahren zur erhöhung der haltbarkeit der feuerfesten auskleidung von metallurgischen gefässen |
| DE3936715A1 (de) * | 1989-11-03 | 1991-05-08 | Kortec Ag | Verfahren zum einbringen von fliessfaehigen zuschlagsstoffen in ein metallurgisches gefaess und gefaess fuer dieses verfahren |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE33401T1 (de) | 1988-04-15 |
| US4735398A (en) | 1988-04-05 |
| KR840004372A (ko) | 1984-10-15 |
| IT8320765A1 (it) | 1984-10-22 |
| IT8320765A0 (it) | 1983-04-22 |
| BE896539A (fr) | 1983-08-16 |
| CA1205637A (fr) | 1986-06-10 |
| KR910002863B1 (ko) | 1991-05-06 |
| DE3376225D1 (en) | 1988-05-11 |
| US4690386A (en) | 1987-09-01 |
| BR8302006A (pt) | 1983-12-27 |
| JPS5941412A (ja) | 1984-03-07 |
| ZA832760B (en) | 1983-12-28 |
| EP0093040B1 (de) | 1988-04-06 |
| IT1194212B (it) | 1988-09-14 |
| FR2525633A1 (fr) | 1983-10-28 |
| LU84742A1 (fr) | 1983-12-05 |
| FR2525633B1 (de) | 1984-11-09 |
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