Induction slag reduction process for purifying metals

Details Induction slag reduction process for purifying metals Induction slag reduction process for purifying metals

1990-12-21

1991-12-10

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75612, 75613, C22B 3400

Patent

active

050714724

ABSTRACT:
A continuous method is provided for purifying and recovering transition metals such as neodymium and zirconium that become reactive at temperatures above about 500.degree. C. that comprises the steps of contacting the metal ore with an appropriate fluorinating agent such as an alkaline earth metal fluosilicate to form a fluometallic compound, and reducing the fluometallic compound with a suitable alkaline earth or alkali metal compound under molten conditions, such as provided in an induction slag metal furnace. The method of the invention is advantageous in that it is simpler and less expensive than methods used previously to recover pure metals, and it may be employed with a wide range of transition metals that were reactive with enclosures used in the prior art methods and were hard to obtain in uncontaminated form.

REFERENCES:
patent: 3101267 (1963-08-01), Dunn
patent: 3472648 (1969-10-01), Suriani
patent: 3493363 (1970-02-01), Ahearn
patent: 3679394 (1972-07-01), Buehler

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