EP1920074A1 - Induktionsgetriebene pfannenunterseitendüse - Google Patents

Induktionsgetriebene pfannenunterseitendüse

Info

Publication number
EP1920074A1
EP1920074A1 EP06801873A EP06801873A EP1920074A1 EP 1920074 A1 EP1920074 A1 EP 1920074A1 EP 06801873 A EP06801873 A EP 06801873A EP 06801873 A EP06801873 A EP 06801873A EP 1920074 A1 EP1920074 A1 EP 1920074A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
ladle
metal
outlet
container
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Withdrawn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
EP06801873A
Other languages
English (en)
French (fr)
Other versions
EP1920074A4 (de
Inventor
Earl K. Stanley
John R. Mott
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.)
Advanced Metals Technology Company LLC
Original Assignee
Advanced Metals Technology Company LLC
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 Advanced Metals Technology Company LLC filed Critical Advanced Metals Technology Company LLC
Publication of EP1920074A1 publication Critical patent/EP1920074A1/de
Publication of EP1920074A4 publication Critical patent/EP1920074A4/de
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/12—Opening or sealing the tap holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/60—Pouring-nozzles with heating or cooling means
    • 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
    • F27D3/1518—Tapholes
    • 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
    • C21C5/46—Details or accessories
    • C21C5/4653—Tapholes; Opening or plugging thereof

Definitions

  • This application relates to an inductively powered nozzle for controlling the flow of metal from a ladle or other vessel containing molten metal.
  • a ladle or other container for molten metal is provided with an outlet nozzle that is easily controlled and less expensive.
  • a stream of molten metal e.g., silicon flows through a tubular refractory nozzle by heating the nozzle to the melting temperature of the metal.
  • the nozzle is, for example, tubular and made OfAl 2 O 3 or SiO 2 and is surrounded by a graphite tube in thermal contact with the nozzle. The nozzle is heated by heating the surrounding graphite tube inductively. Once the temperature of the nozzle exceeds the liquidus temperature of the metal in the ladle, the metal will flow out of the ladle through the nozzle.
  • the nozzle may be made entirely of graphite, if the impurities that contact with the graphite may impart to the metal are not of concern.
  • the rate of flow through the nozzle may be controlled in part also by applying a vacuum to the ladle proper, as is known in the industry. If the vacuum is sufficient, the flow can be controlled very accurately, from a few drops per minute to full flow through the nozzle. It can also be stopped completely, if there is such a need, and re-started later in the process. Thus, accurate control of flow through the nozzle may also be obtained by combining the nozzle of the invention with known techniques.
  • the figure is a vertical cross section of a ladle having a nozzle in accordance with the invention.
  • a ladle 2 which is preferably made of inductively transparent material, as known in the art, includes an outlet 4.
  • the ladle is used to refine metal 5, such as Si that is to be dispensed through the outlet in the molten state and may include a refractory material 3.
  • the metal to be refined may be heated by any known means, such as by inductive heating.
  • the outlet comprises a nozzle 6 made of a material that has a melting point higher than that of the material to be dispensed, which is preferably surrounded by insulating refractory material 7.
  • the metal to be dispensed is Si 5
  • the nozzle may be made of Al 2 O 3 , SiO 2; ZrO 2 or other suitable refractory.
  • the nozzle 6 is engaged with the outlet of the ladle and may be supported by contact with a graphite susceptor tube 8 or by other means.
  • the susceptor tube 8 preferably surrounds the nozzle and is configured to transfer heat to the nozzle 6 to liquefy the metal to be dispensed.
  • the heater tube and nozzle are preferably not in physical contact at all times because their coefficients of expansion differ, but they are configured and positioned such that they are in thermal contact whereby heat from the graphite heater is effectively transferred to the nozzle.
  • the graphite susceptor is preferably heated by energy received from induction coil 10. This has been found to be very efficient and to result in good control of the temperature of the nozzle 6 and good control of the flow through the nozzle, particularly when used in combination with a variable vacuum applied to the ladle.
  • the nozzle is preferably about twelve inches in length and extends beyond the bottom of the heater by several inches, preferably about 3 inches. Extending the end of the nozzle beyond the susceptor promotes cooling of the nozzle when heating is terminated.
  • the nozzle may be of various diameters. Preferably the diameter is from about one-half inch to about one inch. This diameter allows adequate flow of molten metal when the nozzle is heated and permits good control over the flow rate of the metal by application of vacuum to the ladle. Such diameters permit vacuum control of the flow rate during heating and allow the nozzle to clog quickly by cooling of the metal when the flow rate is substantially reduced and heating terminated.
  • the nozzle is preferably heated inductively, other methods of heating are possible.
  • the graphite tube may be a resistor and heated by passing electrical current through it directly with provided leads.
  • the diameter is preferably smaller, e.g., about one-quarter inch. When the diameter is that small, it is possible to shut off flow by simply terminating the heating.
  • the nozzle is made of graphite and heated inductively directly by the induction coil, the power to the coil controlling the temperature in the nozzle and the flow rate of the metal.
  • the induction coil is preferably water cooled, and the cooling effect due to the presence of the water causes the metal to solidify in the nozzle more rapidly to reduce or stop flow when the power to the coil is reduced or shut off.
  • the graphite nozzle can also be cast en bloc with the induction coil with a castable refractory, which improves conduction of heat from the nozzle and metal to the water in a copper induction coil.
  • the combination of the cooling effect of the induction coil and vacuum control provides fine flow control of the molten metal.
  • an oxide refractory nozzle as disclosed above, can be placed inside a close-fitting graphite susceptor tube and still be heated and cooled by the induction coil.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Details (AREA)
EP06801873A 2005-08-19 2006-08-18 Induktionsgetriebene pfannenunterseitendüse Withdrawn EP1920074A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70944205P 2005-08-19 2005-08-19
PCT/US2006/032361 WO2007024703A1 (en) 2005-08-19 2006-08-18 Induction powered ladle bottom nozzle

Publications (2)

Publication Number Publication Date
EP1920074A1 true EP1920074A1 (de) 2008-05-14
EP1920074A4 EP1920074A4 (de) 2009-02-25

Family

ID=37771926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06801873A Withdrawn EP1920074A4 (de) 2005-08-19 2006-08-18 Induktionsgetriebene pfannenunterseitendüse

Country Status (8)

Country Link
US (1) US20090145933A1 (de)
EP (1) EP1920074A4 (de)
JP (1) JP2009504414A (de)
CN (1) CN101292048A (de)
AU (1) AU2006283520A1 (de)
BR (1) BRPI0615480A2 (de)
CA (1) CA2619756A1 (de)
WO (1) WO2007024703A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008037259A1 (de) * 2008-08-08 2010-02-25 Doncasters Precision Castings-Bochum Gmbh Elektromagnetischer Stopfen
CN102228986B (zh) * 2011-06-20 2013-05-08 中冶京诚工程技术有限公司 带电磁加热水口的中间包
WO2012174701A1 (zh) * 2011-06-20 2012-12-27 中冶京诚工程技术有限公司 带电磁加热水口的中间包
CN102784908A (zh) * 2012-08-30 2012-11-21 南京钢铁集团冶金铸造有限公司 钢包无引流浇注工艺
CN104907550B (zh) * 2014-03-10 2017-01-04 中国钢铁股份有限公司 喷嘴装置
JP5723044B1 (ja) * 2014-05-30 2015-05-27 榮子 山田 鋼の連続鋳造用タンディシュノズル及び連続鋳造方法
ES2831829T3 (es) * 2015-12-01 2021-06-09 Refractory Intellectual Property Gmbh & Co Kg Cierre deslizante en la buza de un recipiente metalúrgico
KR101798077B1 (ko) * 2016-03-17 2017-11-16 서울시립대학교 산학협력단 증가된 비표면적을 가진 금속의 제조 장치 및 이를 이용한 금속의 제조 방법
CN107866552A (zh) * 2017-12-21 2018-04-03 苏州誉阵自动化科技有限公司 一种全自动浇注设备
JP2021154304A (ja) * 2020-03-25 2021-10-07 株式会社神戸製鋼所 ボトム出湯用黒鉛ノズル及びＴｉ−Ａｌ基合金の鋳造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB962924A (en) * 1961-01-24 1964-07-08 Bbc Brown Boveri & Cie Improvements in or relating to apparatus for opening and closing outlets of containers for molten metals
US3604598A (en) * 1969-07-09 1971-09-14 United States Steel Corp Outlet passage construction for teeming vessels
WO1998007536A1 (en) * 1996-08-22 1998-02-26 Molten Metal Technology, Inc. Apparatus and method for tapping a molten metal bath
US6072166A (en) * 1995-08-28 2000-06-06 Didier-Werke Ag Method of operating an inductor
US6210629B1 (en) * 1996-10-08 2001-04-03 Didier-Werke Ag Method and device for discontinuous parting off of molten mass
US6358466B1 (en) * 2000-04-17 2002-03-19 Iowa State University Research Foundation, Inc. Thermal sprayed composite melt containment tubular component and method of making same

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5110128A (ja) * 1974-07-16 1976-01-27 Toshiba Ceramics Co Yojukinzokuhaishutsuyonozuruno hoonyojudokanetsusochi
US4272488A (en) * 1977-05-25 1981-06-09 John S. Pennish Apparatus for producing and casting liquid silicon
FR2532866B1 (fr) * 1982-09-13 1985-06-07 Pont A Mousson Chenal de coulee chauffe par induction
US4710260A (en) * 1982-12-22 1987-12-01 Texas Instruments Incorporated Deposition of silicon at temperatures above its melting point
GB8313074D0 (en) * 1983-05-12 1983-06-15 Thornton J M Refractory product
JPH0355488A (ja) * 1989-07-21 1991-03-11 Tokyo Koshuha Denkiro Kk 底注ぎ式容器および底注ぎ式容器のノズル内閉塞方法
US5164097A (en) * 1991-02-01 1992-11-17 General Electric Company Nozzle assembly design for a continuous alloy production process and method for making said nozzle
IT1289009B1 (it) * 1996-10-21 1998-09-25 Danieli Off Mecc Dispositivo di spillaggio per forno elettrico ad arco, forno siviera o paniera e relativo procedimento di spillaggio
US6358297B1 (en) * 1999-12-29 2002-03-19 General Electric Company Method for controlling flux concentration in guide tubes
US7465351B2 (en) * 2004-06-18 2008-12-16 Memc Electronic Materials, Inc. Melter assembly and method for charging a crystal forming apparatus with molten source material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB962924A (en) * 1961-01-24 1964-07-08 Bbc Brown Boveri & Cie Improvements in or relating to apparatus for opening and closing outlets of containers for molten metals
US3604598A (en) * 1969-07-09 1971-09-14 United States Steel Corp Outlet passage construction for teeming vessels
US6072166A (en) * 1995-08-28 2000-06-06 Didier-Werke Ag Method of operating an inductor
WO1998007536A1 (en) * 1996-08-22 1998-02-26 Molten Metal Technology, Inc. Apparatus and method for tapping a molten metal bath
US6210629B1 (en) * 1996-10-08 2001-04-03 Didier-Werke Ag Method and device for discontinuous parting off of molten mass
US6358466B1 (en) * 2000-04-17 2002-03-19 Iowa State University Research Foundation, Inc. Thermal sprayed composite melt containment tubular component and method of making same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2007024703A1 *

Also Published As

Publication number Publication date
CA2619756A1 (en) 2007-03-01
BRPI0615480A2 (pt) 2016-09-13
WO2007024703A1 (en) 2007-03-01
AU2006283520A1 (en) 2007-03-01
JP2009504414A (ja) 2009-02-05
CN101292048A (zh) 2008-10-22
EP1920074A4 (de) 2009-02-25
US20090145933A1 (en) 2009-06-11

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