GB521048A - A lining for eddy current furnaces and method of producing same - Google Patents

A lining for eddy current furnaces and method of producing same

Info

Publication number
GB521048A
GB521048A GB32863/38A GB3286338A GB521048A GB 521048 A GB521048 A GB 521048A GB 32863/38 A GB32863/38 A GB 32863/38A GB 3286338 A GB3286338 A GB 3286338A GB 521048 A GB521048 A GB 521048A
Authority
GB
United Kingdom
Prior art keywords
core
layer
mass
heat
lining
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
GB32863/38A
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
Publication of GB521048A publication Critical patent/GB521048A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

521,048. Furnace linings. ALLMANNA. SVENSKA ELEKTRISKA AKTIEBOLAGET. Nov. 11, 1938, No. 32863. Convention date, Nov. 18, 1937. [Class 51 (ii)] A composite lining for an induction furnace comprising an inner layer of material resistant to high temperatures and to mechanical and chemical action, and an outer heat-insulating layer, is made by first ramming the outer layer around a core and drying it out, and then ramming the inner layer around a smaller core. The material for the outer layer consists of grains of aluminium oxide bound together by aluminium silicate and an organic agglutinant and after the mass has been rammed the core is heated to allow its removal without 'causing the mass to lose its shape, after which the heating is completed at about 1,000‹C. by means of a smaller core which allows moisture to escape uniformly. The inner surface of this layer is then coated with a varnish containing zirconium oxide and chrome ore and the inner layer is rammed round a core preferably turned to a smooth external surface. The materal for this layer consists of zirconium oxide and a basic oxide, e.g., of barium, which are pre-coloured and crushed. An innermost lining of magnesite may be applied when necessary for the metallurgical process to be carried out in the furnace. The heat-insulating layer may be made porous by including in the mass organic substances which are volatilized by heat. Specification 500;057, [Group V], is referred to.
GB32863/38A 1937-11-18 1938-11-11 A lining for eddy current furnaces and method of producing same Expired GB521048A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE521048X 1937-11-18

Publications (1)

Publication Number Publication Date
GB521048A true GB521048A (en) 1940-05-10

Family

ID=20311172

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32863/38A Expired GB521048A (en) 1937-11-18 1938-11-11 A lining for eddy current furnaces and method of producing same

Country Status (1)

Country Link
GB (1) GB521048A (en)

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