Leaching of rare earth elements from eudialyte concentrate by suppressing silica gel formation

In this study a two stage hydrometallurgical treatment of eudialyte concentrate is presented, aiming on recovering rare earth elements and suppressing silica gel formation, The proposed treatment incorporates a preprocessing step called “Fuming”, which is the addition of an acidic solution to eudialyte concentrate heated at boiling temperatures, followed by the leaching step, where the treated concentrate is leached at ambient or low...