GB715558A - Improvements in induction type melting furnaces - Google Patents

Improvements in induction type melting furnaces

Info

Publication number
GB715558A
GB715558A GB1506552A GB1506552A GB715558A GB 715558 A GB715558 A GB 715558A GB 1506552 A GB1506552 A GB 1506552A GB 1506552 A GB1506552 A GB 1506552A GB 715558 A GB715558 A GB 715558A
Authority
GB
United Kingdom
Prior art keywords
coil
crucible
ampere turns
induction
june
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
Application number
GB1506552A
Inventor
Ludwig Dreyfus
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
Allmanna Svenska Elektriska 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, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Priority to GB1506552A priority Critical patent/GB715558A/en
Publication of GB715558A publication Critical patent/GB715558A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H05B6/22—Furnaces without an endless core
    • H05B6/24—Crucible furnaces
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/02—Stirring of melted material in melting furnaces

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Abstract

715,558. Induction furnaces. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. June 11, 1953 [June 16, 1952], No. 15065/52. Class 39 (3) A low frequency induction furnace without a closed iron circuit for treating metal at least partly molten so as to decrease the violence of the stirring effect near the top of the melting furnace comprises a crucible with an induction coil 2 surrounding the crucible 1 and having a number of ampere turns per unit of coil height at its central portion which is at least 1.5 times the corresponding number at the top portion of the winding. A current with a frequency of about 25 to 75 cycles a second is connected to the coil in which the number of ampere turns at the top part of the crucible is constant along a portion adjacent the surface of the molten metal, increases below this part to a maximum number and then decreases at the lower part of the furnace. The winding of the coil may be varied continuously or step by step, or different currents may be fed to different parts of the coil. A laminated iron shell 3 surrounds the coil 2, and the line 5 shows the relative value of the ampere turns at different heights of the crucible. Specification 648,027, is referred to.
GB1506552A 1952-06-16 1952-06-16 Improvements in induction type melting furnaces Expired GB715558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1506552A GB715558A (en) 1952-06-16 1952-06-16 Improvements in induction type melting furnaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1506552A GB715558A (en) 1952-06-16 1952-06-16 Improvements in induction type melting furnaces

Publications (1)

Publication Number Publication Date
GB715558A true GB715558A (en) 1954-09-15

Family

ID=10052408

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1506552A Expired GB715558A (en) 1952-06-16 1952-06-16 Improvements in induction type melting furnaces

Country Status (1)

Country Link
GB (1) GB715558A (en)

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