Continuous-Flow Centrifugal Solid/Liquid Separation for the Recovery of Rare-Earth Elements Containing Particles from Phosphoric Acid Sludge

Phosphoric acid sludge contains acid (∼54% P2O5) and solid precipitates including rare earth elements (REEs) at concentrations of ∼2200 ppm. Low-cost recovery of valuable P2O5 and simultaneous soli...