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Binder - Screw Classifiers
Screw classifiers or dewatering screws are used for simultaneous cleaning and dewatering of sand from upstream, brewed screening machines or for dewatering of cycloned sands. The deslurried coarse sand product is conveyed by the screw against gravity and discharged well dewatered at the upper end of the trough. The fine slurry overflowing at the lower end of the trough contains the majority of the water as well as the fines content of the sand.
How does the screw classifier work
The screw classifier separates the respective feed slurry into a dewatered coarse material and into a fine material slurry. It consists primarily of a flat inclined trough and a transport screw for the coarse material. coarse material. The fine material overflow is located at the lower end of the trough. end of the troughthe coarse material discharge at the upper end. The separation of the solid grains is based on the principles of the different final falling speeds of grains in water. Due to the turbidity level upwards above the turbidity level, the coarse coarse material is dewatered accordingly immediately before discharge.