REE formation in hydrodifluoride processing of the perovskite concentrate

Abstract

The results of studies of the distribution and forms of existence of rare earth elements in hydrodifluoride leaching of the perovskite concentrate have been presented. It has been established that, in the course of concentrate fluorination, rare earth elements form complex fluoroammonium salts. It has been shown that processing the perovskite concentrate using the fluoride technology enables one to extract 82 of rare earth elements and to obtain a concentrate of rare earth elements that contain oxides with admixtures of fluorides in a few stages.