H i G D r y e r f i n e s r e C o v e r y s y s T e m fines recovery s ys T em Princi P le of oP era T ion Coarse P roduct Screw Classifer T o Settling P ond or Flocculation System Derrick HI G Dryer R ecovered F ines P roduct Cyclone F eed P ump Screw Classifer Overfow T h e 4 h y d r o c y c l o n e s a r e m o u n t e d o n a r a d i a l d e s i g n m a n i f o l d f e d b y t h e w a s h p l a n t d i s c h a r g e u n d e r a c o n s i s t e n t p r e s s u r e o f 3 5 t o 3 7 P S I T h e c e n t r i f u g a l s e p a r a t i o n e x t r a c t s t h e u l t r a f i n e s a n d s a n d s i l t s discharging them out the underflow The fines are leaving the hydrocyclones at approximately 55 to 6 0 s o l i d s w h e r e t h e y a r e f e d t o o u r h i g h G f o r c e d e w a t e r i n g s c r e e n T h e H I G D r y e r d e w a t e r i n g u n i t i s powered by two 25 HP electromechanical vibrators operating at 1750 RPM with a stroke length of 019 T h e c o m b i n a t i o n o f s t r o k e l e n g t h a n d r o t a t i o n s p e e d c r e a t e 7 3 G s o f a c c e l e r a t i o n o n t h e s c r e e n s u r f a c e resulting in efficient separation of water from the fine solids The dewatered fines are then discharged from the screening machine at 75 to 80 solids 4