Production of rare-earth oxides from Eskişehir-Beylikova complex ores

Eskişehir-Beylikova kompleks cevherinden nadir toprak oksitlerinin üretimi

Authors

Haydar GÜNEŞ, Hüseyin Eren OBUZ, Hasan AKÇAY, Çiğdem KARA, Ayşe ERDEM

Keywords

Rare Earth Elements, Leaching, Solvent Extraction.

Abstract

In this study, the production technology of rare-earth oxides from Eskişehir-Beylikova complex ore that contains barite, fluorite, rare-earth elements, and thorium were investigated. In this study, processes that can be used in production of thorium-free mixed rare earth oxides were tested. Roasting, leaching, solvent extraction and precipitation methods were used in this study, respectively. Roasting temperature and roasting duration were determined as 600 °C and 1 hour, respectively. The optimum leaching parameters were determined as 5 M HCl, 1 hour leaching duration, 1/3 solid/liquid ratio and 35 °C leaching temperature. In the obtained leach liquor, Adogen was 464 used for removal of iron and D2EHPA was used for the removal of thorium. As a result of solvent extraction stuies, the solution containing rare earth elements was precipitated under optimum conditions. After precipitation, the product contains 99.65% rare earth oxides.

10.19111/bulletinofmre.1180222

 

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