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Title: Induction slag reduction process for purifying metals

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.

Inventors:
 [1];  [2];  [1]
  1. Corvallis, OR
  2. (Albany, OR)
Issue Date:
Research Org.:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
OSTI Identifier:
868086
Patent Number(s):
5071472
Assignee:
United States of America, as represented by Secretary of (Washington, DC)
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
induction; slag; reduction; process; purifying; metals; continuous; method; provided; recovering; transition; neodymium; zirconium; reactive; temperatures; 500; degree; comprises; steps; contacting; metal; appropriate; fluorinating; agent; alkaline; earth; fluosilicate; form; fluometallic; compound; reducing; suitable; alkali; molten; conditions; furnace; advantageous; simpler; expensive; methods; previously; recover; pure; employed; wide; range; enclosures; prior; hard; obtain; uncontaminated; molten condition; metal compound; transition metals; alkali metal; alkaline earth; transition metal; earth metal; wide range; reduction process; induction slag; pure metal; pure metals; fluorinating agent; continuous method; slag reduction; suitable alkali; metallic compound; /75/

Citation Formats

Traut, Davis E, Fisher, II, George T., and Hansen, Dennis A. Induction slag reduction process for purifying metals. United States: N. p., 1991. Web.
Traut, Davis E, Fisher, II, George T., & Hansen, Dennis A. Induction slag reduction process for purifying metals. United States.
Traut, Davis E, Fisher, II, George T., and Hansen, Dennis A. Tue . "Induction slag reduction process for purifying metals". United States. https://www.osti.gov/servlets/purl/868086.
@article{osti_868086,
title = {Induction slag reduction process for purifying metals},
author = {Traut, Davis E and Fisher, II, George T. and Hansen, Dennis A},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

Patent:

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