(19)
(11) EP 0 248 396 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.04.1990 Bulletin 1990/17

(43) Date of publication A2:
09.12.1987 Bulletin 1987/50

(21) Application number: 87107945.5

(22) Date of filing: 02.06.1987
(51) International Patent Classification (IPC)4: C22B 34/14, C22B 9/16
(84) Designated Contracting States:
DE ES FR IT SE

(30) Priority: 05.06.1986 US 871183

(71) Applicant: WESTINGHOUSE ELECTRIC CORPORATION
Pittsburgh Pennsylvania 15222 (US)

(72) Inventors:
  • Worcester, Samuel Austin
    Ogden, UT 84403 (US)
  • Woods, Charles Robert
    Ogden, UT 84403 (US)

(74) Representative: Stratmann, Ernst, Dr.-Ing. 
Schadowplatz 9
40212 Düsseldorf
40212 Düsseldorf (DE)


(56) References cited: : 
   
       


    (54) Combined electron beam and vacuum arc melting for barrier tube shell material


    (57) Process for producing purified zirconium by forming a consumable electrode from a generally virgin sponge of zirconium, melting the consumable electrode in a multiple swept beam electron beam furnace with a feed rate of from 1 to 20 inches per hour and then vacuum arc melting the EB melted material.





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