Method for recycling of rare earth and zirconium oxide materials

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A method is presented for recovery, in reusable form, of rare earth minerals and zirconia from waste materials containing them. The method includes : mixing an ammonium sulfate powder and a powder containing the oxide waste material; heating the mixture to decompose the waste into a residue; dissolving the residue in water; separating rare earth constituents from the solution; and subsequently using the separated rare earth constituent (salt or solution) as a raw material. Moreover, the reactants used in the recovery may be recovered by appropriate precipitation and concentration operations.