Process for the production of tantalum-niobium concentrates

US5573572A · kind A · utility

Assignee

• H. C. Starck GmbH & Co. KG · DE

Inventors

• Joachim Eckert · Bad Harzburg, DE
• Kurt Tolle · Bad Säckingen, DE
• Jochen Weber · Laufenbürg, DE
• Klaus Rieger · Igensdorf, DE

Key dates

• Filing date: Mar 28, 1995
• Grant date: Nov 12, 1996
• Expiry date: Mar 28, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22B34/24
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Process for the production of tantalum-niobium concentrates from low-tantalum, high-niobium raw materials with an Nb.sub.2 O.sub.5 /Ta.sub.2 O.sub.5 ratio of 5 to 15 in a pyrometallurgical concentration process by smelting with carbon-containing reducing agents, reductions and resmelting.