Research on Separating Low-grade K-feldspar from Quartz without Hydrofluoric Acid

摘要

Flotation technology without fluorite was studied to separate low-grade K- feldspar with quartz. It is shown in the results that qualified K-feldspar concentrate can be gained by grinding, desliming, flotation and high intensity Magnetic Separation process. Feldspar concentrate obtained in closed-circuit had a content of K_2O and Na_2O 12.12%, quartz concentrate with a yield of 19.94% containing 97.12% SiO_2 was obtained in the same time.