US3792185A - Channel-type induction furnace - Google Patents

Channel-type induction furnace Download PDF

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Publication number
US3792185A
US3792185A US00283425A US3792185DA US3792185A US 3792185 A US3792185 A US 3792185A US 00283425 A US00283425 A US 00283425A US 3792185D A US3792185D A US 3792185DA US 3792185 A US3792185 A US 3792185A
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US
United States
Prior art keywords
channel
gas
supply
channels
furnace
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.)
Expired - Lifetime
Application number
US00283425A
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English (en)
Inventor
K Folgero
S Hellsing
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3792185A publication Critical patent/US3792185A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C21C5/5241—Manufacture of steel in electric furnaces in an inductively heated furnace
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/16—Furnaces having endless cores
    • H05B6/20—Furnaces having endless cores having melting channel only
    • 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
    • Y02P10/25—Process efficiency
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S65/00—Glass manufacturing
    • Y10S65/04—Electric heat

Definitions

  • Such a furnace is described in our Swedish Pat. No. 328,967, both in single and double-channel design.
  • porous nozzles are applied in the bottom channel, directed towards the side channels, for blowing in an inert gas and possibly a gas re acting with parts of the content of the furnace.
  • the present invention relates to another solution of the problems solved by the object of said patent and lacks the drawbacks mentioned.
  • the invention is characterised in that at least one nozzle is arranged below each coil at the part of the channel located furthest away from the hearth, to blow gas into the channel, for example inert gas and possibly a gas which reacts with part of the contents of the furnace.
  • gas for example inert gas and possibly a gas which reacts with part of the contents of the furnace.
  • FIG. 1 shows a single channel
  • FIG. 1 shows a single phase furnace having a primary coil 11, usually for 50-60 Hz, and a channel 12 of ceramic stamping compound 13 or lining compound of conventional type (it may also be casting compound) arranged around the coil 11 and preferably concentric with this, both ends of this channel opening out into a furnace hearth 14.
  • the number of such inductor units may be one or more.
  • the circular channel shape gives high coscb and efficiency in relation to rectangular or square channel shape (in section) and the positioning of the plug, a single plug, makes it possible to construct a circular length of channel (in a plane across the coil).
  • the plug 15 is placed symmetrically and it is possible to acquire a flow which is suitable for temperature equalization and to prevent deposits.
  • the number of part-nozzles may be one or more, for example one for inert gas and one for active gas. However, two or more such partnozzles require only one recess and may together be deemed to comprise one nozzle.
  • furnace construction can be varied in many ways within the scope of the following claims.
  • a channel-type induction furnace having at least one inductor and in which the channel comprises two side channels leading from the furnace hearth and a bottom channel connecting said two side channels, means to blow gas through said channels so as to avoid a build up of deposits on the channel wall comprising:
  • a gas discharge device located essentially at the midpoint of said bottom channel on the opposite side of the inductor coil from the hearth;
  • said gas discharge device comprises at least two nozzles and said means to supply comprises means to supply an inert gas to one nozzle and means to supply a gas which will react with the furnace contents to the other nozzle.
  • each of said side channels and said bottom channel comprises an annular section essentially concentric with the induction coil, thereby forming a rounded annular channel and wherein said gas discharge device is located at a point equidistant from the openings of said annular channel into the hearth.
  • a channel-type induction furnace having at least one inductor and in which the channel comprises first, second and third spaced side channels extending away from the furnace hearth, the second channel being between the first and third channels, and a bottom channel connecting said side channels, means to blow gas through said channels so as to avoid a build up of deposits on the channel walls comprising:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Furnace Details (AREA)
  • General Induction Heating (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US00283425A 1971-09-09 1972-08-24 Channel-type induction furnace Expired - Lifetime US3792185A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7111412A SE373431B (fr) 1971-09-09 1971-09-09

Publications (1)

Publication Number Publication Date
US3792185A true US3792185A (en) 1974-02-12

Family

ID=20293916

Family Applications (1)

Application Number Title Priority Date Filing Date
US00283425A Expired - Lifetime US3792185A (en) 1971-09-09 1972-08-24 Channel-type induction furnace

Country Status (5)

Country Link
US (1) US3792185A (fr)
JP (1) JPS5544316B2 (fr)
DE (1) DE2242927B2 (fr)
GB (1) GB1395656A (fr)
SE (1) SE373431B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3213767A1 (de) * 1982-04-14 1983-10-27 Institut problem lit'ja Akademii Nauk Ukrainskoj SSR, Kiev Induktionsrinnenofen

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5439314A (en) * 1977-09-02 1979-03-26 Kureha Seitetsu Kk Method of manufacturing highly pure silicon iron
JPS53108020A (en) * 1977-09-08 1978-09-20 Kobe Steel Ltd Aluminum removing method for ferrosilicon alloy
DE3126200C2 (de) 1981-07-03 1985-03-14 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Verfahren zur Beseitigung von Rückstandsprodukten aus Müllverbrennungsanlagen
JPS5847099U (ja) * 1981-09-17 1983-03-30 新日本製鐵株式会社 チヤンネル型誘導加熱装置のインダクタ−構造
SE428625B (sv) * 1981-10-20 1983-07-11 Asea Ab Rennugn
JPS594238U (ja) * 1982-06-30 1984-01-12 ヤンマー農機株式会社 収穫機の結束機におけるシヤツタ−装置
FR2671563B1 (fr) * 1991-01-11 1994-08-05 Air Liquide Procede de traitements metallurgiques.
EP2993958B1 (fr) * 2014-09-04 2017-11-22 Georg Fischer GmbH Four à induction à canal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2805271A (en) * 1955-11-14 1957-09-03 Lindberg Eng Co Multiple chamber induction furnace
US3192303A (en) * 1961-08-03 1965-06-29 Olsson Erik Allan Method of reducing overheating in melting troughs and similar devices in melting and holding furnaces
US3591698A (en) * 1966-11-09 1971-07-06 Ass Elect Ind Metal treatment apparatus
US3618917A (en) * 1969-02-20 1971-11-09 Asea Ab Channel-type induction furnace

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2805271A (en) * 1955-11-14 1957-09-03 Lindberg Eng Co Multiple chamber induction furnace
US3192303A (en) * 1961-08-03 1965-06-29 Olsson Erik Allan Method of reducing overheating in melting troughs and similar devices in melting and holding furnaces
US3591698A (en) * 1966-11-09 1971-07-06 Ass Elect Ind Metal treatment apparatus
US3618917A (en) * 1969-02-20 1971-11-09 Asea Ab Channel-type induction furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3213767A1 (de) * 1982-04-14 1983-10-27 Institut problem lit'ja Akademii Nauk Ukrainskoj SSR, Kiev Induktionsrinnenofen

Also Published As

Publication number Publication date
JPS5544316B2 (fr) 1980-11-11
JPS4836738A (fr) 1973-05-30
SE373431B (fr) 1975-02-03
GB1395656A (en) 1975-05-29
DE2242927B2 (de) 1976-09-16
DE2242927A1 (de) 1973-03-15

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