WO2009018796A1 - Système de piquée sans scories ou de transfert de métal fondu - Google Patents

Système de piquée sans scories ou de transfert de métal fondu Download PDF

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Publication number
WO2009018796A1
WO2009018796A1 PCT/DE2008/001144 DE2008001144W WO2009018796A1 WO 2009018796 A1 WO2009018796 A1 WO 2009018796A1 DE 2008001144 W DE2008001144 W DE 2008001144W WO 2009018796 A1 WO2009018796 A1 WO 2009018796A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
melt
slag
vessel
siphon
Prior art date
Application number
PCT/DE2008/001144
Other languages
German (de)
English (en)
Inventor
Norbert Uebber
Manfred Schubert
Original Assignee
Sms Siemag 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 Sms Siemag Ag filed Critical Sms Siemag Ag
Publication of WO2009018796A1 publication Critical patent/WO2009018796A1/fr

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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5294—General arrangement or layout of the electric melt shop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/113—Treating the molten metal by vacuum treating
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/19—Arrangements of devices for discharging
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/28—Arrangement of controlling, monitoring, alarm or the like devices
    • 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
    • F27D19/00—Arrangements of controlling devices
    • 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
    • F27D3/14—Charging or discharging liquid or molten material
    • 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
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C2005/5288—Measuring or sampling devices
    • 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
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0054—Means to move molten metal, e.g. electromagnetic pump
    • F27D2003/0056—Means to move molten metal, e.g. electromagnetic pump through a syphon in a vacuum chamber, e.g. involving aspiration or pressure on the bath
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • a bay is specially designed or designed a separately attached bay, which adjoins a connecting wall of the lower vessel of the arc furnace and is connected via a tapping channel with this.
  • DE 102 23 906 A1 can be controlled at pressure and vacuum-tight coverage of this bay window, by controlling the gas pressure in the bay, the tapping speed of the melt or the tapping can be started or interrupted.
  • EP 1 181 491 B1 is a metallurgical vessel in which a siphon is an integral part of the lower vessel part.
  • the invention is therefore an object of the invention to provide a device of the type mentioned above for slag-free melt transfer with good maintainability and high availability, with which can continue to avoid business interruptions for the replacement of a worn tapping system. It should also be possible to use a fixed arc furnace.
  • siphon is designed as a separate, mobile unit.
  • the essence of the invention thus consists in that the siphon for slag-free melt transfer is not firmly integrated into the vessel for melting or for the metallurgical work, so it is not firmly connected with this structurally, but is designed as an independent, independently movable or movable system ,
  • the melt flow can be introduced and maintained by means of a negative pressure in the channel and be interrupted again by releasing the negative pressure.
  • at least one vessel is movable in height.
  • the proposal is to make it possible that with the help of the siphon concept a slag-free tapping and / or a fixed arc furnace and generally a slag-free transfer of melt between metallurgical vessels is reliably enabled.
  • the concept should in particular be implemented in a relatively simple way to electric arc furnaces, steel pans, etc. and allow easy maintenance and in particular a quick replacement of the siphon.
  • the system is also intended to allow controllability of the melt flow between the vessels, in particular the beginning and end of the melt flow.
  • the transfer of a melt from an electric arc furnace 1 takes place into a first metallurgical vessel 2 and from there into a second metallurgical vessel 3.
  • the siphon is designated in this and in all other figures with 4 and consists of an inlet channel 5, a connecting channel 6 and an outlet channel. 7
  • a siphon 4 is positioned with refractory lined channels over the two vessels such that the two ends of inlet and outlet channel 5, 7 protrude into the respective melt.
  • a negative pressure is built up at the upper end of the outlet channel 7.
  • the corresponding connection is numbered 8.
  • the melt flow is determined essentially by the height difference between the melts in both vessels 1, 2 and the channel cross sections and can be varied to a certain extent by relative changes in the height of the vessels.
  • FIG. 2 shows the melt flow between two metallurgical vessels, in which the vessel to be filled is empty at the beginning and is filled from the arc furnace.
  • the channel end is temporarily sealed gas-tight in the vessel to be filled.
  • the closure 10 can be realized for example by sheets or plates at the channel end, which are provided with sealing compounds. Release of the melt flow may be accomplished by actively removing or opening the shutter 10, by timely melting of the shutter, or by exceeding a metallostatic pressure threshold above the shutter. It should be noted that the possibly necessary residual evacuation of the melt channel takes place more quickly than the gas volume in the channel rises again by the start of the melt outlet.
  • the vessel to be filled is movable in height and is lowered during the tapping process according to the melt flow steadily down.
  • the outlet end of the melt or outlet channel 7 can also be located outside the melt of the vessel to be filled.
  • the height of the melt in the channel system can be linked by a control unit 12 with the vacuum generation.
  • inert gas 13 can be introduced into the inlet channel 5 of the melt, similar to an RH system (FIG. 3). This accelerates the flow rate and increases the metallurgical purity.
  • a slag detection system 14 may preferably be installed in the inlet channel 5 (for example an induction coil around the channel).
  • the slag transfer can be reduced or avoided to a minimum by rapid gas filling of the melt channel.
  • efficient intervention is significantly less favorable.
  • Another way to detect running slag when emptying a vessel is the detection of the course of the negative pressure in Evacuation channel. If slag is sucked in, this is reflected in a discontinuity of the pressure curve.
  • melt channel in discontinuous use of the channel can be preheated with hot burner gases or spent, for example, in a preheating furnace.
  • the ends of the channels 5, 7, which dip into the melts, should preferably be designed to be exchangeable quickly, since slag attachments can form here over time and the edges of the inlet opening are subject to wear.
  • this can also be used for the slagging, e.g. a fixed arc furnace, are used.
  • the tapping system can be subjected to a gas pressure, wherein upon reaching the boundary layer of the gas pressure increases due to the higher density of the melt. In response to this signal, the system can then be slightly withdrawn, the vacuum for the suction of slag generated and thus the vessel to be detoxified.
  • the transfer of the melt does not require a tilting movement.
  • the melt comes in no significant contact with the ambient air, so that the gas absorption is reduced or prevented.
  • the tapping process or the transfer of melt can be used to improve the metallurgical purity of the melt.
  • the height difference between the melt channel inlet and outlet can be made larger than the metallostatic height in the vessel to be emptied, so that with the same outlet cross-section, a larger mass flow can be achieved.
  • the melt can be purified with a customized system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

L'invention concerne un système de piquée sans scories ou de transfert de métal fondu d'un récipient métallurgique (1, 2, 3) dans un autre récipient métallurgique ayant une configuration de siphon en forme de U inversé. Le siphon (4) présente un conduit d'entrée (5), un conduit de liaison (6) ainsi qu'un conduit de sortie (7) et le conduit d'entrée (5) et le conduit de sortie (7) peuvent être plongés dans le récipient de départ ou dans le récipient d'arrivée. Le système ainsi proposé doit être facile à entretenir et offrir une grande disponibilité tout en évitant les interruptions de l'exploitation pour remplacer un système de piquée usé. Dans ce but, le siphon (4) est réalisé sous la forme d'un ensemble mobile autonome.
PCT/DE2008/001144 2007-08-04 2008-07-09 Système de piquée sans scories ou de transfert de métal fondu WO2009018796A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007036970 2007-08-04
DE102007036970.2 2007-08-04
DE102008008033A DE102008008033A1 (de) 2007-08-04 2008-02-06 Einrichtung zum schlackenfreien Abstich oder zur Überführung einer Schmelze
DE102008008033.0 2008-02-06

Publications (1)

Publication Number Publication Date
WO2009018796A1 true WO2009018796A1 (fr) 2009-02-12

Family

ID=40176048

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2008/001144 WO2009018796A1 (fr) 2007-08-04 2008-07-09 Système de piquée sans scories ou de transfert de métal fondu

Country Status (2)

Country Link
DE (1) DE102008008033A1 (fr)
WO (1) WO2009018796A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9932649B2 (en) 2012-12-21 2018-04-03 Posco Fixed-type electric furnace and molten steel production method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105771808A (zh) * 2016-03-02 2016-07-20 昆明安厦新材料科技有限公司 一种固体原料液化装置及工艺流程
CN107199332B (zh) * 2017-05-15 2019-11-22 兰州理工大学 铝锭连续铸造生产线打渣机器人的发讯装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776439A (en) * 1972-04-03 1973-12-04 Gen Electric Fail-safe liquid pumping and flow control system
WO1996006319A1 (fr) * 1994-08-18 1996-02-29 Comalco Aluminium Limited Procede de transfert de metal fondu
JP2000328135A (ja) * 1999-05-13 2000-11-28 Kurosaki Harima Corp 真空脱ガス装置用シュノーケルの熱間補修方法とこれに使用する補修用耐火物
JP2001201261A (ja) * 2000-01-21 2001-07-27 Nissei Ltd 炉の出湯装置
US6596221B1 (en) * 1999-04-01 2003-07-22 Arcmet Technologie Gmbh Metallurgical vessel having a tapping device and method for the controlled, slag-free extraction of molten metal from said vessel
EP1486271A1 (fr) * 2003-06-13 2004-12-15 MPC Metal Process Control AB Procédé et dispositif de détection de laitier

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UA79599C2 (en) 2001-09-26 2007-07-10 Sms Demag Ag Arc furnace with melt tapping through the bay window (variants) and method for arc furnace operating (variants)

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776439A (en) * 1972-04-03 1973-12-04 Gen Electric Fail-safe liquid pumping and flow control system
WO1996006319A1 (fr) * 1994-08-18 1996-02-29 Comalco Aluminium Limited Procede de transfert de metal fondu
US6596221B1 (en) * 1999-04-01 2003-07-22 Arcmet Technologie Gmbh Metallurgical vessel having a tapping device and method for the controlled, slag-free extraction of molten metal from said vessel
JP2000328135A (ja) * 1999-05-13 2000-11-28 Kurosaki Harima Corp 真空脱ガス装置用シュノーケルの熱間補修方法とこれに使用する補修用耐火物
JP2001201261A (ja) * 2000-01-21 2001-07-27 Nissei Ltd 炉の出湯装置
EP1486271A1 (fr) * 2003-06-13 2004-12-15 MPC Metal Process Control AB Procédé et dispositif de détection de laitier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9932649B2 (en) 2012-12-21 2018-04-03 Posco Fixed-type electric furnace and molten steel production method

Also Published As

Publication number Publication date
DE102008008033A1 (de) 2009-02-05

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