US3474178A - Rotatable metallurgical electric furnace - Google Patents

Rotatable metallurgical electric furnace Download PDF

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Publication number
US3474178A
US3474178A US617396A US3474178DA US3474178A US 3474178 A US3474178 A US 3474178A US 617396 A US617396 A US 617396A US 3474178D A US3474178D A US 3474178DA US 3474178 A US3474178 A US 3474178A
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US
United States
Prior art keywords
furnace
barrel
inductor
spout
passage
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
US617396A
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English (en)
Inventor
Walter Fadler
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.)
Wiener Schwachstromwerke GmbH
Original Assignee
Wiener Schwachstromwerke 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 Wiener Schwachstromwerke GmbH filed Critical Wiener Schwachstromwerke GmbH
Application granted granted Critical
Publication of US3474178A publication Critical patent/US3474178A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/34—Arrangements of heating 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/06—Induction heating, i.e. in which the material being heated, or its container or elements embodied therein, form the secondary of a transformer
    • 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

  • This invention relates, in general, to the construction of metallurgical furnaces and, in particular, to a new and useful barrel-type furnace constructed and arranged so that it may be oriented with selected one of two inductive heaters in an effective position and with the other of the heaters positioned to permit replacement thereof.
  • the durability of the lining of a furnace depends principally on the wall thickness of the lining.
  • the lining of the cruciblerinductors must necessarily be thinner than the lining of the furnace vessel in order to minimize the stray field.
  • the crucible inductors do not last for the life of the furnace and they must be frequently replaced. It is important that the replacement of the inductors be carriedout as quickly as possible in order that the operation of the furnace be not unduly interrupted and in order to insure that the temperature does not drop inside the furnace by a considerable amount.
  • a barrel-type induction furnace which is mounted so that it may be rotated and disposed in either a first position with a first inductive heater arranged at the lowermost end thereof in an operative position and second inductive heater arranged in an uppermost position at an inoperative location or it may be rotated to a second position in which the inductive heater positions are reversed.
  • the inductive heaters are formed as lateral extensions of the barrel-type furnace and they are arranged in diametrically opposite extensions formed on the furnace.
  • the extensions provide a mounting fora replaceable crucible inductor which will be oriented in the same manner as the extensions with their axes inclined in respect to the central axis of the barrel furnace.
  • the induction heaters are also advantageously arranged symmetrically to the central axis of the barrel furnace.
  • the furnace is oriented so that one of the induction heaters extends up wardly above the surface of the melt whereas the other one extends downwardly from below the bottom of the furnace.
  • the downwardly extending induction heater would be in an operative position to heat the material in the furnace and the upper one of the induction heaters would be switched off.
  • the lowermost heater must be replaced or be allowed to be turned off for a period of time, it is merely necessary to rotate the barrel-type furnace in order to position the opposite heater in an operative position at which it extends downwardly from the bottom of the furnace.
  • the other one is automatically positioned in an uppermost position at which it may be turned off and left inoperative. In this inoperative position, it may be removed and the extension portion of the furnace may be plugged if desired, or the defective induction heater may be replaced by a new induction heater.
  • the barrel-type furnace includes two diametrically opposite pouring spouts.
  • One of the spouts arranged on one side of the furnace defines a passage which will extend upwardly when the other spout defined on the opposite side of the furnace has the passage defined thereby turned downwardly.
  • the downwardly turned spout may be plugged and the upwardly turned spout may be used for pouring off the melt by tilting the furnace in a direction to move the discharge end thereof downwardly below the level of the melt.
  • an object of the invention to provide an improved barrel-type furnace which includes a tubular furnace member which is mounted to be rotated between a first position and a second position and which includes inductors which are arranged at diametrically oppositely extending sides, one of which will be positioned uppermost in the first position of the barrel furnace and the other of which will be positioned lowermost, the barrel being rotatable to change the position of the inductors in the second position to permit replacement or removal thereof or operation thereof as desired.
  • a further object of the invention is to provide a rotatable barrel-type furnace which includes a plurality of inductor heaters which may be selectively moved between an operative and an inoperative position in order to permit the inductors to be either used to heat the melt or shut-off and either replaced or removed as desired.
  • a further object of the invention is to provide a metallurgical furnace which is of barrel configuration and is mounted for rotation and which includes spout members formed at diametrical sides, with one of the spout members defining a downwardly extending passage and the other of the spout members defining an upwardly extending passage, the spout with the downwardly extending passage being adapted to be plugged to permit the other passage to be used for pouring the melt or both of the passages being adapted to be plugged to permit rotation of the barrel furnace.
  • a further object of the invention is to provide a metallurgical furnace which is simple in design, rugged in construction and economical to manufacture.
  • FIG. 1 is a longitudinal sectional view of a barrel furnace constructed in accordance with the invention
  • FIG. 2 is a section taken on the line 22 of FIG. 1;
  • FIG. 3 is a view similar to FIG. 2 indicating the barrel furnace in a rotated position.
  • the invention embodied therein comprises a metallurgical furnace including a barrel-type furnace vessel generally designated 1 which is rotatably supported on a pedestal 10.
  • the barrel-type furnace includes diametrically oppositely formed extension portions 12 and 14 which are provided for mounting crucible inductors 4 and 3, respectively.
  • one of the inductors that is, the inductor 3 in the drawing, is disposed in an operative position below the bath surface 5 to provide a means for heating the melt.
  • the opposite inductor, the inductor 4 is disposed in a position above the melt surface 5 so that it can be removed from the furnace and replaced if desired.
  • the furnace is rotated from the position indicated in FIG. 1 to cause the inductors 3 and 4 to be positioned in the dotted line position indicated at 3 and 4.
  • the rotation takes place about the center line 2.
  • the inductor 3 will be in the position 3' so that it can be either removed and replaced or the extension 14 can be plugged to permit operation only with the inductor 4'.
  • the barrel-type furnace of the invention includes a spout formation 16 on its one side with an upwardly directed passage 6 and a spout formation 17 on its opposite side with a downwardly directed passage 7.
  • the passage 7 is plugged at the opposite end by tightly securing at the discharge end a plug or stopper member 8.
  • the tapping duct 6 may be employed for tapping the melt 3.
  • the furnace 1' is rotated in the direction of the arrow 9 to bring the passage discharge end down below the surface of the melt 5 and to cause the outpouring of the melt material.
  • each of the passages 6 and 7 are plugged with suitable plugs as indicated in FIG. 3.
  • a metallurgical furnace comprising a rotatable furnace vessel having a first extension portion with a first inductor extending outwardly on one side thereof and a second extension portion with a second inductor extending outwardly therefrom on the side substantially diametrically opposite to the first inductor, and means for rotatably supporting said vessel to permitysaid first and second inductors to be selectively positioned-in an operative position at which the respective inductor extends downwardly from said vessel and to an inoperative position at which it extends upwardly from said vessel whereby said inoperative inductor may be removed from said vesso] such as for replacement thereof.
  • a metallurgical furnace including first and second pouring spouts defined at respective opposite sides of said vessel, said first pouring spout having a passage which extends upwardly and said second pouring spout having a passage extending downwardly when said first inductor is in'an operative position, said second pouring spout passage being plugable to prevent melt from flowing thereout and the first pouring spout passage being useable-for tappingthe melt.
  • a metallurgical furnace according toclaim 2 wherein saidfirst andsecohd pouring spouts" are arranged symmetrically on respective diametrically opposite sides of said vessel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • General Induction Heating (AREA)
US617396A 1966-02-22 1967-02-20 Rotatable metallurgical electric furnace Expired - Lifetime US3474178A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT160866A AT277598B (de) 1966-02-22 1966-02-22 Trommelofen mit auswechselbaren Tiegelinduktoren

Publications (1)

Publication Number Publication Date
US3474178A true US3474178A (en) 1969-10-21

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ID=3517103

Family Applications (2)

Application Number Title Priority Date Filing Date
US617396A Expired - Lifetime US3474178A (en) 1966-02-22 1967-02-20 Rotatable metallurgical electric furnace
US792184*A Expired - Lifetime US3519719A (en) 1966-02-22 1968-11-21 Method of operating metallurgical furnaces

Family Applications After (1)

Application Number Title Priority Date Filing Date
US792184*A Expired - Lifetime US3519719A (en) 1966-02-22 1968-11-21 Method of operating metallurgical furnaces

Country Status (7)

Country Link
US (2) US3474178A (hu)
AT (1) AT277598B (hu)
BE (1) BE693917A (hu)
CH (1) CH446556A (hu)
FR (1) FR1514449A (hu)
GB (1) GB1149113A (hu)
SE (1) SE310032B (hu)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5354970A (en) * 1992-06-30 1994-10-11 Inductotherm Corp Pot for batch coating of continuous metallic strip
US5787110A (en) * 1995-11-01 1998-07-28 Inductotherm Corp. Galvanizing apparatus with coreless induction furnace
US5872805A (en) * 1996-08-14 1999-02-16 Inductotherm Corp. Pot for coating continuous metallic strip

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1094354A (en) * 1896-10-28 1914-04-21 Olga Pieper Electric furnace and process of heating substances.
US2406147A (en) * 1944-05-09 1946-08-20 Kellogg M W Co Apparatus for producing metal
US2754346A (en) * 1952-08-08 1956-07-10 Steele D Williams Glass melting furnace
US3088182A (en) * 1958-07-10 1963-05-07 Ajax Magnethermic Corp Furnace
US3244495A (en) * 1962-07-02 1966-04-05 Bausch & Lomb Regulated flow glass melting furnace

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1094354A (en) * 1896-10-28 1914-04-21 Olga Pieper Electric furnace and process of heating substances.
US2406147A (en) * 1944-05-09 1946-08-20 Kellogg M W Co Apparatus for producing metal
US2754346A (en) * 1952-08-08 1956-07-10 Steele D Williams Glass melting furnace
US3088182A (en) * 1958-07-10 1963-05-07 Ajax Magnethermic Corp Furnace
US3244495A (en) * 1962-07-02 1966-04-05 Bausch & Lomb Regulated flow glass melting furnace

Also Published As

Publication number Publication date
AT277598B (de) 1969-12-29
FR1514449A (fr) 1968-02-23
CH446556A (de) 1967-11-15
SE310032B (hu) 1969-04-14
GB1149113A (en) 1969-04-16
BE693917A (hu) 1967-07-17
US3519719A (en) 1970-07-07

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