Comparative Analysis of Sequential Leaching Procedures for Dissociation of Rare Earth Elements in Gold-Bearing Material
N. F. USMANOVA1,2, V. I. BRAGIN1,2, A. M. ZHIZHAEV1, E. N. MERKULOVA1, G. N. BONDARENKO1
1Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, ul. Akademgorodok 50, Bld. 24, Krasnoyarsk, 660036 Russia
2Siberian Federal University, pr. Svobodnyi 79, Krasnoyarsk, 660041 Russia
Keywords: последовательное выщелачивание, редкоземельные элементы, монацит, гипергенез, кора выветривания, sequential leaching, rare earth elements, monazite, hypergenesis, residuum
Abstract
The article describes sequential leaching of gold-bearing ore of the residuum. The interconnection between rare earth elements and their mineral matrix is defined. The mobility of REE in the initial ore and during hypergenesis is assessed. Two kinds of REE are revealed: fine monazite cerium-neodymium crusts in iron-bearing minerals and dense monazite pockets in titanium-bearing minerals. The five-stage sequential leaching procedure allows more detailed distribution of elements in the rebellious matrix while the three-stage procedure focuses on mobile forms.
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