REFINING OF TANTALUM AND TANTALUM SCRAP WITH CARBON

Title:

REFINING OF TANTALUM AND TANTALUM SCRAP WITH CARBON

Document Type and Number:

WIPO Patent Application WO2000049188

Kind Code:

A9

Abstract:

Tantalum scrap of high oxygen content (10) is recovered and processed to metallurgical grade tantalum by fine particulation. Blending with carbon or other appropriate solid reducing agent (14), melting in a plasma furnace (20) at about tantalum melt temperature while suppressing partial pressure of tantalum oxide gas to minimize tantalum loss of the process.

Inventors:

DORVEL ROBERT A (US)
SHEKHTER LEONID N (US)
SIMON ROSS W (US)

Application Number:

PCT/US2000/003875

Publication Date:

November 15, 2001

Filing Date:

February 15, 2000

Export Citation:

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Assignee:

STARCK H C INC (US)
DORVEL ROBERT A (US)
SHEKHTER LEONID N (US)
SIMON ROSS W (US)

International Classes:

C22B4/00; C22B4/04; C22B34/24; (IPC1-7): C22B34/24

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