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

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

Pages : 87-97

Doi:10.19111/bulletinofmre.1180222

View : 24 | Download : 10

Publication Date : 2023-04-17

Article Type : Research Paper

Abstract :In this study, the production technology of barite, fluorite, rare-earth elements, and thorium-bearing rare-earth oxides from the Eskişehir-Beylikova were investigated, and the processes that can be used in the production of thorium-free mixed rare earth oxides were tested. The applied processes are roasting, leaching, solvent extraction and precipitation methods, respectively. After all studies, the optimum roasting temperature and roasting duration are determined as 600 °C and 1 hour. In the extraction stage, the highest leaching efficiency is achieved with 5 M HCl, 1-hour leaching duration, 1/3 solid/liquid ratio and 35 °C leaching temperature. While methyl tri C8-C10 ammonium chloride insert ignore into journalissuearticles values(Adogen 464); is used for the removal of iron from produced solution, di-insert ignore into journalissuearticles values(2-ethylhexyl); phosphoric acid insert ignore into journalissuearticles values(D2EHPA); is used for the removal of thorium. As a result of solvent extraction studies, the solution containing rare earth elements is precipitated under optimum conditions. After precipitation, the product contains 99.65% rare earth oxides.
Keywords : Rare Earth Elements, Roasting, Leaching, Solvent extraction, Precipitation