STUDY OF CERIUM AND NEODYMIUM LEACHING FROM KAZAKHSTAN PHOSPHOGYPSUM

Abstract

Ab ract. The processes of extraction of cerium and neodymium from Kazakh an phosphogypsum, a large-tonnage wa e of mineral fertilizer production of “Kazphosphate” LLP, have been udied. The elemental analysis was udied. It has been found that the use of hydrogen peroxide as an oxidizer in the and by 28% for neodymium. Optimal parameters of cerium and neodymium leaching under atmospheric and autoclave conditions have been found. In atmospheric conditions, recovery of cerium and neodymium were 70.3% and 92.0%, in autoclave conditions 72.9% and 87.5%, respectively. The obtained results allow us to hope for the processing possibility of these wa es with the aim of rare-earth metals and other valuable products recovery.