CD shopping page |
2011-Sustainable Industrial Processing Summit
|
| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 764 pages |
| ISBN: | 978-0-9879917-5-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Combined Approaches For Comprehensive Processing Of Rare Earth Metal Ores
Elena Voskresenskaya1; Gennady Pashkov1; Vladimir Kuzmin1;1INSTITUTE OF CHEMISTRY & CHEMICAL TECHNOLOGY SB RA, Krasnoyarsk, Russia;
Type of Paper: Invite
Id Paper: 409
Topic: 14
Abstract:
The technology for processing of rare metal ores (Chuktukon deposits, East Siberia, Russia) was developed. Ores are composed of iron-manganese oxides and contain 3-7 % of rare-earth oxides in the phosphate form (turnerite, florencite) and 0.5-1 % of niobium oxide (chalcolamprite). These ores are refractory and do not practically undergo to concentrate, therefore various processes for their direct chemical processing are considered. A flowchart including autoclave nitro-acid leaching and extractive separation of rare-earth elements, regenerative processing of tails after leaching and extraction of Nb concentrate into non-magnetic fraction is proposed. Under this scheme nitrate solutions subject to thermal decomposition for the purpose of nitric acid regeneration. Pyrometallurgical process of ore processing with production of cast-iron and products from rare metals was suggested. The different technological problems on realization of the developed processes will be discussed.