The invention discloses a method for separating and recovering
scandium in stable
zirconia ceramic wastes containing
scandium and
rare earth. The method comprises the following steps: crushing
ceramic wastes firstly, sieving by virtue of a 200-mesh
sieve, then dissolving the crushed
powder by acid; after heating and concentrating a filtrate, adding
potassium chloride, carrying out
crystallization to obtain
potassium fluozirconate, and separating
zirconium from a solution; and washing filter residues, carrying out conversion treatment by using 5-20 percent
sodium hydroxide, washing the residues again
after treatment, dissolving with acid, extracting
scandium by using an extractant so as to realize the separation of scandium and the
rare earth, neutralizing an extraction
raffinate with alkali, recovering the
rare earth from precipitates, and searing to obtain rare earth
oxide; and carrying out washing and back extraction on an organic phase for extracting the scandium, precipitating the scandium by
oxalic acid, and searing to obtain
scandium oxide. According to the method disclosed by the invention, the purity of Sc2O3 is larger than 99 percent, the
recovery rate is larger than 90 percent, the
recovery rate of the rare earth is larger than 90 percent, and the
recovery rate of Zr is larger than 95 percent.