A method for recovering Rare Earth Elements from low grade ore

摘要

A method is described for the Recovery of Rare Earth Elements from low-grade ore, method that includes a Select Group of First metal containing at least one of Iron and Aluminum and a Second metal selected from the group consisting of at least , Rare Earth Elements (LANTHANUM, Cerium, Praseodymium, neodymium, Samarium, Europium, promised,GADOLINIUM, Terbium, Dysprosium, Holmium, Erbium, THULIUM, YTTERBIUM and LUTETIUM, Yttrium, Scandium).The Method comprises the steps of: (i) contacting the low-grade metal sulfates with sulfuric acid to obtain the first group of metals; (ii) subjecting the mixture to high temperatures, with the aim of making the first group of sulphates and Phosphates or other Stable species. ING Group, sulphates; (iii) add water to the mixture ColdDissolve selectively the rare-earth elements and (iv) The rare-earth Solution subject to a purification process.