Sorption Conversion of Eudialyte Concentrate in Sulphuric Acid Medium
E. P. LOKSHIN, O. A. TAREEVA, S. V. DROGOBUZHSKAYA
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Research Center, Russian Academy of Sciences, Apatity, Russia
Keywords: eudialyte concentrate, acid processing, rare elements, recovery
Pages: 266-272
Abstract
Thorough investigation of the decomposition of eudialyte concentrate by means of sorption conversion in low-concentration sulphuric acid solutions is carried out. The effect of process conditions on the efficiency of decomposition of acid-soluble minerals from the concentrate and sorption of valuable metals and natural radionuclides from the concentrate by the sorbent is studied. It is shown that the sorption of rare earth elements, manganese, uranium and thorium, which are rather stable against hydrolysis under experimental conditions, is achieved within a broad range of process parameters. The optimal conditions for the sorption of zirconium (hafnium), niobium (tantalum) and titanium by the sorbent differ due to different hydrolytic stability of these elements in low-concentration acid solutions. The choice of optimal process conditions should be determined by economic reasonability because it is impossible to achieve a high recovery of all valuable components at the same time.
DOI: 10.15372/CSD2022381
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