PROCESSING METHOD OF RESIDUE CONTAINING RARE EARTH

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PROBLEM TO BE SOLVED : To provide a processing method of a residue capable of reducing the volume of an acid residue generated after treating mud containing a rare earth by acid, and processing it at a low cost. SOLUTION : A processing method of a residue containing a rare earth includes a component adjustment step in which a component adjustment material comprising one or more kinds selected from a group consisting of a cement, a lime, a material containing calcium carbonate and a blast furnace slag fine powder are added to an acid residue generated after treating mud containing the rare earth by acid, and mixed therewith, to thereby obtain a mixture, and a heating step in which the obtained mixture is heated at 1, 200-1, 300°C and melted, then cooled, to thereby obtain an earthwork material. SELECTED DRAWING : None COPYRIGHT : (C)2017, JPO&INPIT