XSG series of spin flash dryer is by tangent to a hot air enters into the bottom of the drier and agitator driven in the formation of a powerful rotating wind field. Paste materials from the spiral feeder into the dryer, in high-speed rotating impeller under the strong action and materials by the impact, friction and shear stress is obtained by dispersing, bulk material swiftly crushed, full contact with hot air, heated and dried.