GB1120648A - Improvements in processes for heating and melting by high frequency electrical induction - Google Patents

Improvements in processes for heating and melting by high frequency electrical induction

Info

Publication number
GB1120648A
GB1120648A GB5391665A GB5391665A GB1120648A GB 1120648 A GB1120648 A GB 1120648A GB 5391665 A GB5391665 A GB 5391665A GB 5391665 A GB5391665 A GB 5391665A GB 1120648 A GB1120648 A GB 1120648A
Authority
GB
United Kingdom
Prior art keywords
charge
heating
melting
processes
high frequency
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
GB5391665A
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.)
Societe Europeenne des Produits Refractaires SAS
Original Assignee
Electro Refractaire SA
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
Priority claimed from FR234A external-priority patent/FR1430192A/en
Priority claimed from FR233A external-priority patent/FR1427905A/en
Priority claimed from FR24198A external-priority patent/FR88911E/en
Application filed by Electro Refractaire SA filed Critical Electro Refractaire SA
Publication of GB1120648A publication Critical patent/GB1120648A/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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/653—Processes involving a melting step
    • 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
    • F27B14/00—Crucible or pot furnaces
    • F27B14/04—Crucible or pot furnaces adapted for treating the charge in vacuum or special atmosphere
    • 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
    • F27B14/00—Crucible or pot furnaces
    • F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/006—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage
    • H02H11/007—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage involving automatic switching for adapting the protected apparatus to the supply voltage

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Power Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Furnace Details (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

1,120,648. Induction heating. L'ELECTROREFRACTAIRE. 20 Dec., 1965 [29 Dec., 1964], No. 53916/65. Heading H5H. Materials having low conductivity when cold, e.g. oxides of Al, Zr, Mg, W, Th, are melted in an induction furnace by associating with the main charge an auxiliary charge of a material which has a high conductivity when cold and undergoes an exothermic reaction with the atmosphere when heated. The auxiliary charge may consist of a powdered or granulated metal such as A1, Zr, Mg, W or Si and is preferably one which reacts to form the oxide or one of the oxides constituting the main charge. It may be deposited above the main charge or in a hole formed in the centre of the charge.
GB5391665A 1964-12-29 1965-12-20 Improvements in processes for heating and melting by high frequency electrical induction Expired GB1120648A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR234A FR1430192A (en) 1964-12-29 1964-12-29 Electric high frequency induction furnace
FR233A FR1427905A (en) 1964-12-29 1964-12-29 High frequency electric induction heating and melting process
FR24198A FR88911E (en) 1965-07-09 1965-07-09 Electric high frequency induction furnace

Publications (1)

Publication Number Publication Date
GB1120648A true GB1120648A (en) 1968-07-24

Family

ID=27241827

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5391665A Expired GB1120648A (en) 1964-12-29 1965-12-20 Improvements in processes for heating and melting by high frequency electrical induction
GB5511065A Expired GB1122151A (en) 1964-12-29 1965-12-29 High-frequency electric induction furnace

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB5511065A Expired GB1122151A (en) 1964-12-29 1965-12-29 High-frequency electric induction furnace

Country Status (5)

Country Link
BE (2) BE673541A (en)
CH (2) CH439518A (en)
DE (1) DE1519747B2 (en)
GB (2) GB1120648A (en)
NL (2) NL6516634A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004047495A1 (en) * 2002-11-15 2004-06-03 Liquid Ceramics Technology Pty Ltd Method and apparatus for heating refractory oxides
US9212302B2 (en) 2010-10-06 2015-12-15 VSM•Vereinigte Schmirgel-und Maschinen-Fabriken AG Method for producing zirconia-reinforced alumina grains, in particular abrasive grains, and grains produced by such method
CN113446848A (en) * 2020-03-24 2021-09-28 中国科学院金属研究所 Method for melting kilogram-level oxide and metal powder mixture at ultrahigh temperature

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004047495A1 (en) * 2002-11-15 2004-06-03 Liquid Ceramics Technology Pty Ltd Method and apparatus for heating refractory oxides
US9212302B2 (en) 2010-10-06 2015-12-15 VSM•Vereinigte Schmirgel-und Maschinen-Fabriken AG Method for producing zirconia-reinforced alumina grains, in particular abrasive grains, and grains produced by such method
CN113446848A (en) * 2020-03-24 2021-09-28 中国科学院金属研究所 Method for melting kilogram-level oxide and metal powder mixture at ultrahigh temperature
CN113446848B (en) * 2020-03-24 2022-03-29 中国科学院金属研究所 Method for melting kilogram-level oxide and metal powder mixture at ultrahigh temperature

Also Published As

Publication number Publication date
DE1519747A1 (en) 1970-02-26
BE673541A (en) 1966-06-09
NL6516634A (en) 1966-06-30
BE674148A (en) 1966-04-15
CH453519A (en) 1968-06-14
NL6517050A (en) 1966-06-30
DE1519747B2 (en) 1972-03-16
CH439518A (en) 1967-07-15
GB1122151A (en) 1968-07-31

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