EP1087025A1 - Drahtzuführvorrichtung - Google Patents

Drahtzuführvorrichtung Download PDF

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Publication number
EP1087025A1
EP1087025A1 EP00102943A EP00102943A EP1087025A1 EP 1087025 A1 EP1087025 A1 EP 1087025A1 EP 00102943 A EP00102943 A EP 00102943A EP 00102943 A EP00102943 A EP 00102943A EP 1087025 A1 EP1087025 A1 EP 1087025A1
Authority
EP
European Patent Office
Prior art keywords
wire
unit
tube
ladle
steel
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.)
Withdrawn
Application number
EP00102943A
Other languages
English (en)
French (fr)
Inventor
Peter c/o c30 RHS Paneltech Limited Fox
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.)
RHS Paneltech Ltd
Original Assignee
RHS Paneltech Ltd
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 RHS Paneltech Ltd filed Critical RHS Paneltech Ltd
Publication of EP1087025A1 publication Critical patent/EP1087025A1/de
Withdrawn legal-status Critical Current

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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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • 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
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • F27D3/0026—Introducing additives into the melt
    • 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
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires

Definitions

  • This invention relates to a wire feed unit for the controlled injection of wire into a melt.
  • Wire feed units are known and are intended to be used during the so-called “Secondary steelmaking” process to enable wires to be fed directly into a ladle.
  • wire feeding is carried out to enable calcium silicide, ferro titanium, sulphur and carbon to be injected into molten steel contained in a ladle, and clearly the introduction of wire needs to be carefully controlled so as to ensure correct dosing of the melt with the additive(s) required.
  • the length of the tube down which the wire is fed is important as this has the dual effect not only of guiding the wire, but also straightening the wire, which assists the penetration of the wire into the molten steel.
  • the tube is inserted into the roof of a ladle arc furnace with an optimum length to enable the straightening of the wire prior to penetration of the steel.
  • the high heat flux results in the tubes quickly burning away, which progressive shorting soon eliminates the straightening effect required. This leads to the wire not penetrating the steel and results in a coiling effect of the wire on top of the usual slag covering of the melt, and tube burn back, together with slag adhesion at the tip have presented practical difficulties.
  • a basic object of the invention is the provision of an improved wire feed unit.
  • a wire feed unit for the controlled feeding of wire from a coil into a steel melt in a ladle for purposes of introducing additives into the melt, comprising a water cooled guide tube of length capable of imparting a straightening effect on wire fed along the guide tube and of allowing the uncontrolled wire leaving the guide tube to be close to its point of penetration of the steel in the ladle.
  • a ladle arc furnace to operate the argon stirring process and incorporating at least one wire feed unit in accordance with the first aspect of the invention, which unit is positioned at such an angle to enable the wires to penetrate the steel adjacent to the bubble created during the argon stirring process.
  • the tube comprises two co-axial, mild steel tubes, being an inner tube along which the wire passes and an outer tube, with an annular, water flow gap between the external periphery of the inner tube, and the internal periphery of the outer tube.
  • the inner tube is of a sufficient internal diameter to allow the free passage of wire therethrough, without the possibility of jamming.
  • the outer tube is longitudinally split into two halves with sufficient material removed from each half to accommodate two dividing strips.
  • the annular gap at the outfeed end of the unit is sealed eg using a 5mm thick annulus of mild steel.
  • a water inlet connection is provided to one half of the annular gap, and a water outlet connection is provided to the other half of the annular gap.
  • a conical guide is provided at the wire infeed end.
  • the unit fabrication is carried out using low hydrogen welding electrodes.
  • the inner tube (2) is of a sufficient internal diameter (D) to allow the free passage of wire (not shown) therethrough, without the possibility of jamming.
  • D internal diameter
  • the internal diameter (D) of the inner tube (2) should be no less than 35mm and the wall thickness of this tube should be 6mm.
  • the annular gap (4) in use conveys cooling water and should be approximately 6mm, as this will determine the flow velocity of cooling water along the annular gap (4).
  • the outer tube (3) is longitudinally split into two halves (4A, 4B) with sufficient material removed from each half to accommodate two dividing strips (7, 8) shown in Fig. 2.
  • Gaps (9) are created at either side of the dividing strips (7, 8) to create orifices (10) to allow the passage of water from one half (4A) to the other half (4B) of the tube.
  • the annular gap (4) at the outfeed end (11) of the unit (1) is sealed eg using a 5mm thick annulus (12) of mild steel.
  • the annular gap (4) is sealed at the wire infeed end (13) eg using a 5mm thick annulus (14) of mild steel.
  • a conical guide (15) is provided at the wire infeed end (13).
  • the unit is fabricated using low hydrogen welding electrodes.
  • the outer tube (3) is provided with inlet and outlet water connections (16, 17 respectively) at the wire infeed end (13) of the unit (1) as shown in Fig. 1, with inward water flow as indicated by arrow (18), reversal by arrow (19), and return by arrow (20).
  • the flow of water to the unit (1) should be of a sufficient volume and velocity to prevent nucleate boiling taking place inside the unit (1) and specifically within the annular gap (4). This amount of water should be in the order of 7 gallons/min per 1m length of wire feed tube. Therefore the inlet and outlet connection (16, 17 respectively) should be 1'' B.S.P.
  • the unit (1) is located at an angle ⁇ with respect to the vertical to suit the argon stirring bubble that is created in the known, argon stirring process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP00102943A 1999-09-24 2000-02-14 Drahtzuführvorrichtung Withdrawn EP1087025A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9922543 1999-09-24
GBGB9922543.5A GB9922543D0 (en) 1999-09-24 1999-09-24 Wire feed unit

Publications (1)

Publication Number Publication Date
EP1087025A1 true EP1087025A1 (de) 2001-03-28

Family

ID=10861476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00102943A Withdrawn EP1087025A1 (de) 1999-09-24 2000-02-14 Drahtzuführvorrichtung

Country Status (3)

Country Link
EP (1) EP1087025A1 (de)
CA (1) CA2299192A1 (de)
GB (2) GB9922543D0 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1853412A4 (de) * 2005-03-04 2008-12-17 Affival Inc Endstück eines führungsrohres, montage und verfahren
CN104889363A (zh) * 2015-06-03 2015-09-09 天津市航宇金属加工有限公司 一种新型铝合金液体导流装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011080017B3 (de) 2011-07-28 2012-11-22 Siemens Aktiengesellschaft Vorrichtung zur Aufnahme und zum Abspulen mindestens einer Drahtrolle, damit ausgestattete metallurgische Anlage sowie Verfahren zum Abspulen von Draht
CN105115303A (zh) * 2015-08-28 2015-12-02 钦州西北冶金设备有限公司 电冶炉下料嘴冷却装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5687636A (en) * 1979-12-18 1981-07-16 Nippon Kokan Kk <Nkk> Adding method for element such as ca with high reactivity to molten metal in nonoxidizing atmosphere
EP0662522A2 (de) * 1994-01-11 1995-07-12 Magneco/Metrel, Inc. Verfahren und Vorrichtung zur Herstellung von Stahl in einem Behälter
JPH07207320A (ja) * 1994-01-20 1995-08-08 Nisshin Steel Co Ltd 脱硫効率を高めた溶銑脱硫方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB877202A (en) * 1959-04-22 1961-09-13 Chihiro Kawashima A method of manufacturing durable lance pipes for oxygen smelting
US3911993A (en) * 1974-07-12 1975-10-14 Caterpillar Tractor Co Method and apparatus for adding treating agents to molten metal
DE2607947C2 (de) * 1976-02-27 1985-03-14 Fried. Krupp Gmbh, 4300 Essen Beschickungseinrichtung
DE3509795C1 (de) * 1985-03-19 1986-06-05 Klöckner CRA Technologie GmbH, 4100 Duisburg Wassergekuehlte Blaslanze zum Aufblasen von Sauerstoff auf eine Metallschmelze
DD248608B3 (de) * 1986-04-28 1993-02-25 Esch Engineering Service Cente Wassergekuehlte aufblaslanze fuer einen konverter zur stahlerzeugung
LU90210B1 (de) * 1998-02-04 1999-08-05 Wurth Paul Sa Verfahren zum Chargieren eines Elektroofens mit pulverfoermigem Material
JPH11246902A (ja) * 1998-03-04 1999-09-14 Kawasaki Steel Corp 粉体吹込み用ランス

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5687636A (en) * 1979-12-18 1981-07-16 Nippon Kokan Kk <Nkk> Adding method for element such as ca with high reactivity to molten metal in nonoxidizing atmosphere
EP0662522A2 (de) * 1994-01-11 1995-07-12 Magneco/Metrel, Inc. Verfahren und Vorrichtung zur Herstellung von Stahl in einem Behälter
JPH07207320A (ja) * 1994-01-20 1995-08-08 Nisshin Steel Co Ltd 脱硫効率を高めた溶銑脱硫方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 005, no. 156 (C - 074) 6 October 1981 (1981-10-06) *
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 11 26 December 1995 (1995-12-26) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1853412A4 (de) * 2005-03-04 2008-12-17 Affival Inc Endstück eines führungsrohres, montage und verfahren
ES2329860A1 (es) * 2005-03-04 2009-12-01 Affival, Inc. Pieza terminal de tubo de guia, montaje y procedimiento.
ES2329860B2 (es) * 2005-03-04 2010-08-10 Affival, Inc. Pieza terminal de tubo de guia, montaje y procedimiento.
US7829010B2 (en) 2005-03-04 2010-11-09 Affival, Inc. Guide tube end-piece, assembly and method
CN104889363A (zh) * 2015-06-03 2015-09-09 天津市航宇金属加工有限公司 一种新型铝合金液体导流装置

Also Published As

Publication number Publication date
CA2299192A1 (en) 2001-03-24
GB0002268D0 (en) 2000-03-22
GB2354527A (en) 2001-03-28
GB9922543D0 (en) 1999-11-24

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