Noble and Rate Metals in Caustobioliths and Prospect of Their Recovery
T. N. ALEKSANDROVA1, A. V. ALEKSANDROV2, N. V. NIKOLAEVA1, A. O. ROMASHEV1
1National Mineral Resources University-Mining University, V.O. 21-ya liniya 2, Saint-Petersburg, 199106 Russia
2Institute of Mining, Far East Branch, Russian Academy of Sciences, ul. Turgeneva 51, Khabarovsk, 680000 Russia
Keywords: каустобилиты, углеродистое вещество, сорбционное выщелачивание, флотация, магнитное обогащение, стратегические металлы, caustobioliths, carbonic substance, sorption leaching, flotation, magnetic concentration, strategic metals
Abstract
Under discussion is recoverability of noble and rare metals from caustobioliths (shale, natural bitumen, etc.). The presented mineralogical and technological analyses of samples show higher content of valuable microelements in some of them. All tested samples contain various rank carbon. Depending on the type of the raw material, the research follows one of three lines: stage-wise diagnostic sorption leaching, flotation with pre-milling in amino acetic acid and magnetic concentration. Based on the examination of scattered carbon substance in caustobioliths, it is supposed that concentrations of metals are asphaltene fractions of bitumoids (bitumen-like substance). The research results show prospect of using this nonconventional coal-bearing raw material as a source of noble and rare metals.
|
