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US 6,814,779 B2Granted
Process for producing high-purity metals
AssigneeDowa Mining Co., Ltd.
InventorsKishio Tayama, Shunichi Kimura
Life of this patent
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Abstract
A process for metal purification comprising a first step for heating a feed metal in a feed crucible to generate a vapor of the metal, a second step for directing the vapor into a condensation passageway for vapors, where part of the vapor is condensed to generate a molten condensate, a third step for directing the vapor through the condensation passageway for vapors into a solidification crucible so that the vapor is cooled to solidify said metal in a high-purity form, and a fourth step for returning the molten condensate into the feed crucible.
Claims9
A process for metal purification comprising
- a first step for heating a feed metal in a feed crucible to generate a vapor of said metal,
- a second step for directing said vapor into a condensation passageway for vapors, where part of the vapor is condensed to generate a molten condensate,
- a third step for directing said vapor through said condensation passageway for vapors into a solidification crucible so that the vapor is cooled to solidify said metal in a high-purity form and
- a fourth step for returning said molten condensate into said feed crucible.
1 more element
Dependencies are inferred from the claim text.