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2 048 558

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IPC

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Application

93021936/02, 1993-04-12

(22)

Actual filing date

1993-04-12

(45)

Published

1995-11-20

(72)

Inventor

Bateev V.B.Evstjukhin A.I.Kotsar' M.L.Leont'Ev G.A.Rjabin E.V.Fedorov V.D.

(73)

Holder

Vsesojuznyj Nauchno-Issledovatel'Skij Institut Khimicheskoj Tekhnologii

METHOD FOR PRODUCTION OF HIGH-PURITY ZIRCONIUM OF HAFNIUM Russian patent published in 1995 - IPC

Abstract RU 2048558 C1

FIELD: production of high-purity zirconium or hafnium. SUBSTANCE: method for production of high-purity zirconium or hafnium consists in calcium thermic reduction of tetrafluorides in the presence of substances containing nickel. Alloy of zirconium or hafnium with nickel may be produced by out-of-furnace reduction melting. Optimal remelting of zirconium or hafnium iodide bars is carried out in vacuum at residual pressure of 1,3·10-1-1,3·10-4 Pa. EFFECT: simplified driving-off of nickel from alloy, reduced consumption of calcium, and improved purity of zirconium or hafnium. 3 cl, 2 tbl

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RU 2 048 558 C1

Authors

Bateev V.B.

Evstjukhin A.I.

Kotsar' M.L.

Leont'Ev G.A.

Rjabin E.V.

Fedorov V.D.

Dates

1995-11-20—Published

1993-04-12—Filed

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