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WO2009071137A1 - Dispositif de traitement métallurgique secondaire et sous vide d'acier liquide - Google Patents

Dispositif de traitement métallurgique secondaire et sous vide d'acier liquide Download PDF

Info

Publication number
WO2009071137A1
WO2009071137A1 PCT/EP2008/006840 EP2008006840W WO2009071137A1 WO 2009071137 A1 WO2009071137 A1 WO 2009071137A1 EP 2008006840 W EP2008006840 W EP 2008006840W WO 2009071137 A1 WO2009071137 A1 WO 2009071137A1
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum
sealing means
seal
vessel
vacuum 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.)
Ceased
Application number
PCT/EP2008/006840
Other languages
German (de)
English (en)
Inventor
Hans Kollecker
Michael Peschel
Rainer Teworte
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.)
SMS Mevac GmbH
Original Assignee
SMS Mevac GmbH
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 SMS Mevac GmbH filed Critical SMS Mevac GmbH
Priority to EP08785649.8A priority Critical patent/EP2217732B1/fr
Priority to ES08785649.8T priority patent/ES2455523T3/es
Publication of WO2009071137A1 publication Critical patent/WO2009071137A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C21C7/10—Handling in a vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals

Definitions

  • the invention relates to a device for secondary and vacuum metallurgical treatment of liquid steel, comprising a vacuum vessel, such as an RH, VD or VOD container, which is sealed for the vacuum process with a raised and lowered lid and / or connected to a sealed, continuing vacuum pipeline.
  • a vacuum vessel such as an RH, VD or VOD container
  • the flanges are provided with water cooling, the seal has only a short service life due to overheating, but also mechanical damage, hardening and acid attack. The seal change is also awkward. An insufficiently tight seal may not necessarily be detected prior to the start of the process, so that as a consequence the vacuum necessary for the successful process may not be achieved.
  • the suction power of the vacuum pumps is usually designed taking into account a larger leakage, which in turn increases the investment costs and the operating costs.
  • the invention is therefore based on the object to provide an improved seal in a device of the type mentioned, with which can avoid the disadvantages mentioned.
  • Another significant advantage of the sealing concept is that a spatially and temporally separation of the functions "mechanical merging of the vacuum vessel and lid” and “vacuum-tight closure of the parts" takes place by the sealing means arranged according to the invention on the outer vessel or pipe wall.
  • a preferred embodiment of the invention provides that the sealing means placed annularly around the vacuum vessel and / or the connection end of the vacuum pipeline is radially expandable and thus can be pressed against the collar. In a preferred embodiment, this is done by means of an inflatable seal or a seal which can be pressed by a separate inflatable ring body to the collar. This results in a further optimized sealing, because with the inflation or -wide, the seal adapts automatically to any production-related unevenness of the enclosing surfaces of the cover collar and the vacuum vessel and / or the vacuum pipe.
  • the sealing means can be connected to a pressure medium supply.
  • the pressure medium supply can be switched on or controlled only when the lid has lowered into its final position or the sub-pipe pieces of the continuing vacuum pipeline have reached their Endglageposition and the sealing function is needed.
  • the seal can be relieved or -spannt accordingly.
  • the invention can also be used for the ventilation of the vacuum vessel after the vacuum treatment.
  • the seal is relaxed and vented the vacuum vessel over the forming annular gap.
  • two sealing means are arranged parallel to and spaced from each other circumferentially, wherein the suction space after the slipping of the lid and / or joining the pipe sections of the continuing vacuum pipe enclosed between the two sealing means, a negative pressure generating suction device is connected.
  • a negative pressure generating suction device is connected.
  • Fig. 1 as a detail of a vacuum degassing in a longitudinal section a counting of the prior art, sealed by an attached lid closed vacuum vessel with previously introduced melt pan;
  • Figure 2 is a very schematic representation of a seal according to the invention between vacuum vessel and lid, shown in solid lines in the operating position and dash-dotted with lifted lid.
  • FIG. 3 shows a detail of a cross section of a possible sealing means or a seal which is radially inflatable, as indicated by dash-dotted lines;
  • Fig. 4 as a detail two spaced apart from each other
  • FIG. 5 shows a vacuum pipeline arrangement, on the one hand in coupled operating position and on the other hand in decoupled external operating position (compare the right half of the figure).
  • Fig. 1 shows a known type of vacuum degassing, in which in a vacuum vessel 1 a filled with liquid metal 2 melt pan 3 is set.
  • the vacuum vessel 1 is sealed by a liftable and lowerable cover 4 with the interposition of an annular full seal 5.
  • the full seal is received by sealing grooves which are incorporated in complementary flanges 6 and 7 on the one hand of the lid 4 and on the other hand of the vacuum vessel 1.
  • the cover 4 is provided with connections 8 for supply lines 9 for the introduction of alloying materials and a centrally arranged oxygen lance 14.
  • the sealing concept shown in Fig. 2 differs significantly from the known or conventional, the example of FIG. 1 above-described seal between flanges 6, 7 of the lid 4 and vacuum vessel 1 from.
  • the lid is no longer placed with a flange on a flange pad, but lowered starting from the dashed lines in Fig. 2, raised inoperative position of 104 'numbered lid and placed over the vacuum vessel 100.
  • the lid 104 is formed with a downwardly bent, the vacuum vessel 100 cross-collar 10.
  • the collar 10 of the over-pushed lid 104 settles on a sealing means 11 which is disposed at the upper end 12 just below the vessel opening around the circumference of the vacuum vessel 100.
  • the ring around the circumference of the vacuum Vessel 100 laid sealing means 11 is preferably designed as a radially expandable expandable seal 13, which or may have the configuration shown in Fig. 3, but also arbitrarily tubular shaped.
  • the inflatable seal 13 expands radially (see., In Fig. 3 dash-dotted schematically drawn expansion position 13 ') and presses against the inner wall of the collar 10.
  • the inflatable seal 13 is relieved or relaxed, so that the cover 104 can be raised without contact to the sealing means 11 or to the inflatable seal 13 in the inoperative position (see cover 104 'in Fig. 2).
  • the pressure medium supply can also be used for the ventilation of the vacuum vessel 1, to which the expansion seal 13 relaxes and the vacuum vessel 1 is vented through an annular gap thereby forming.
  • FIG. 5 shows a vacuum pipeline 200 connected to the vacuum vessel, not shown here, from which two partial pipe sections 200 'and 200 "which can be coupled to one another can be seen.
  • a sealing means 211 is arranged, which is designed as a radially expandable inflatable seal 213.
  • a collar 210 is formed which, when the two partial tube sections 200 'and 200 "are joined together, which abut one another here with the end faces of their tube ends, overlies the sealing means 211 and the inflatable seal 213.
  • compressed air or the like is introduced into the cavity of the inflatable seal 213 after the collar 210 has been slipped over or overlapped by means of a pressurized medium supply, so that the inflatable seal 213 expands radially (compare the illustration in the left-hand illustration of FIG. 5 shown as a detail on an enlarged scale Blähdichtung 213 with dash-dotted lines schematically drawn Aufweitposition 213 ') and pressed against the inner wall of the collar 210.
  • the bellows seal 213 is relieved or relaxed, so that the collar 210 can be moved without contact to the sealant 211 and the inflatable seal 213 in an inoperative position.
  • connection end 10 201 connection end 10 collar 11 sealant 12 connection end

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Details (AREA)

Abstract

L'invention concerne un dispositif de traitement métallurgique secondaire et sous vide d'acier liquide, comprenant un récipient à vide, tel qu'un récipient RH, VD ou VOD, qui peut être hermétiquement fermé pour le processus sous vide par un levier relevable et abaissable (104) et/ou qui est raccordé à une conduite de vide étanche menant plus loin. Pour un tel dispositif, l'invention veut améliorer l'étanchéité entre le couvercle (104) et/ou la conduite de vide menant plus loin d'une part, et le récipient à vide (100) d'autre part. À cet effet, un moyen d'étanchéité (11 ; 13) est disposé sur le pourtour à l'extrémité supérieure (12) du récipient à vide (100) et/ou de la conduite de vide, et le couvercle (104) et/ou une extrémité de raccordement de la conduite de vide menant plus loin est réalisé avec un collet (10) pouvant être enfoncé sur le moyen d'étanchéité (11 ; 13).
PCT/EP2008/006840 2007-12-03 2008-08-20 Dispositif de traitement métallurgique secondaire et sous vide d'acier liquide Ceased WO2009071137A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08785649.8A EP2217732B1 (fr) 2007-12-03 2008-08-20 Dispositif de traitement métallurgique secondaire et sous vide d'acier liquide
ES08785649.8T ES2455523T3 (es) 2007-12-03 2008-08-20 Dispositivo para el tratamiento metalúrgico secundario y bajo vacío de acero líquido

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007058403.4 2007-12-03
DE102007058403 2007-12-03
DE102008027006A DE102008027006A1 (de) 2007-12-03 2008-06-06 Vorrichtung zur sekundär- und vakuum-metallurgischen Behandlung von flüssigem Stahl
DE102008027006.7 2008-06-06

Publications (1)

Publication Number Publication Date
WO2009071137A1 true WO2009071137A1 (fr) 2009-06-11

Family

ID=40586009

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/006840 Ceased WO2009071137A1 (fr) 2007-12-03 2008-08-20 Dispositif de traitement métallurgique secondaire et sous vide d'acier liquide

Country Status (4)

Country Link
EP (1) EP2217732B1 (fr)
DE (1) DE102008027006A1 (fr)
ES (1) ES2455523T3 (fr)
WO (1) WO2009071137A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101871035A (zh) * 2010-05-31 2010-10-27 北京科技大学 一种用于无取向硅钢生产的精炼装置及真空精炼工艺

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101875999B (zh) * 2009-12-25 2012-10-03 中冶南方工程技术有限公司 一种双工位rh系统的真空管道密封装置
CN104846152B (zh) * 2015-06-01 2017-01-18 重庆钢铁集团设计院有限公司 一种双罐单盖式vd精炼炉结构
CN104846153B (zh) * 2015-06-01 2017-01-04 重庆钢铁集团设计院有限公司 一种采用双罐单盖式vd精炼炉对钢水实现真空精炼的方法
DE202015008803U1 (de) * 2015-12-23 2017-03-24 Leybold Gmbh Verbindungseinrichtung
CN107941003A (zh) * 2017-11-16 2018-04-20 石昌梅 一种提升效率的真空冶炼炉

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1925280A1 (de) * 1969-05-17 1970-11-19 Krupp Gmbh Rohrverbindung fuer Vakuumleitungen
DE2815011A1 (de) 1978-04-07 1979-10-18 Bleickert Gerhard Abdichtvorrichtung fuer vakuumanlagen
DE3609783A1 (de) 1986-03-22 1987-09-24 Doerrenberg Edelstahl Gmbh Reaktor-giesspfanne
DE3719735A1 (de) * 1987-06-12 1988-12-29 Plasmatec Metallbeschichtungs Gasdichter ofen, insbesondere vakuumofen
US4867675A (en) * 1988-06-15 1989-09-19 Blackman Calvin C Method and apparatus for quickly purging atmosphere gas from bell furnace
US6331269B1 (en) 1997-07-16 2001-12-18 Aluminium Pechiney Inert tank for treating oxidizable liquid metal

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1209134B (de) * 1964-07-08 1966-01-20 Standard Messo Duisburg Vorrichtung zur Vakuumbehandlung fluessiger Metalle
DE1811363B2 (de) * 1968-11-28 1976-10-07 Rheinländer, Paul, Prof. Dr.-Ing., 3340 Wolfenbüttel Verfahren zur stahlentgasung und vorrichtungen zu seiner durchfuehrung
JPH04131317A (ja) * 1990-09-22 1992-05-06 Nippon Steel Corp Ｒｈ真空脱ガス処理方法
JPH10237535A (ja) * 1997-02-28 1998-09-08 Nippon Steel Corp 減圧精錬炉

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1925280A1 (de) * 1969-05-17 1970-11-19 Krupp Gmbh Rohrverbindung fuer Vakuumleitungen
DE2815011A1 (de) 1978-04-07 1979-10-18 Bleickert Gerhard Abdichtvorrichtung fuer vakuumanlagen
DE3609783A1 (de) 1986-03-22 1987-09-24 Doerrenberg Edelstahl Gmbh Reaktor-giesspfanne
DE3719735A1 (de) * 1987-06-12 1988-12-29 Plasmatec Metallbeschichtungs Gasdichter ofen, insbesondere vakuumofen
US4867675A (en) * 1988-06-15 1989-09-19 Blackman Calvin C Method and apparatus for quickly purging atmosphere gas from bell furnace
US6331269B1 (en) 1997-07-16 2001-12-18 Aluminium Pechiney Inert tank for treating oxidizable liquid metal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101871035A (zh) * 2010-05-31 2010-10-27 北京科技大学 一种用于无取向硅钢生产的精炼装置及真空精炼工艺

Also Published As

Publication number Publication date
ES2455523T3 (es) 2014-04-15
EP2217732B1 (fr) 2014-03-12
DE102008027006A1 (de) 2009-06-04
EP2217732A1 (fr) 2010-08-18

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