| 简介 |
PURPOSE : A method is provided which recycles separated elements by separating rare earth elements and aluminum from waste slurry of cerium abrasive, improves separating and recovering ratios of the rare earth elements by effectively decomposing cerium oxide, and easily separates the rare earth elements from aluminum. CONSTITUTION : The method for separating and recovering rare earth elements and aluminum from waste slurry of cerium abrasive comprises a step of heat treating waste abrasive slurry dried powder containing rare earth elements and aluminum to a temperature of 500 deg.C; a step of converting the waste slurry powder into sulfate by mixing sulfuric acid with the heat treated waste slurry powder, thereby reacting the sulfuric acid with the heat treated waste slurry powder; a step of recovering a leach solution by water leaching the reaction proceeded dried powder; a step of performing a double salt precipitation method in which sodium sulfate is added to the leach solution; and a step of separating and recovering the rare earth elements and aluminum by solid-liquid separating the double salt precipitation method performed leach solution. |
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