Rare Metal and Rare Earth Recovery from Silica Gel-Eudialyte Concentrate Leaching Product
V. A. Chanturia, A. L. Samusev, V. G. Minenko, G. A. Kozhevnikov
Academician Melnikov Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, Moscow, Russia
Keywords: silica gel, zirconium, rare earth elements, dissolution, recovery, optimal parameters
Abstract
The effect of various parameters (S:L ratio, duration, temperature and intensity of ultrasonic treatment) on recovery efficiency of zirconium and rare earth elements (REE) in dissolution of silica gel is investigated. The leaching process optimization is performed using the method of Taguchi L9 orthogonal array and the analysis of variance (ANOVA). The recovery of zirconium and REE from silica gel to pregnant solution at the optimized dissolution parameters is 47.95 and 56.17%, respectively. The ANOVA method shows that contribution of ultrasonic treatment in the recovery of zirconium and REE equals 89.6 and 59.6%.
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