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The comparison between dewatering screen and rotary dryer


Dewatering screen is one of the most effective tools of dehydration in wet sand processing plant currently, which can maximally remove water out of sand, aggregate, mining and etc. The other one is rotary dryer, which also can effectively remove water from material. However, the cost of rotary dryer is several times more than dewatering screen. So considering the dewatering screen is more popular than rotary dryer.

How to achieve dewatering?
Dewatering screen:
The dewatering screen adopts dual-motor self-synchronization technology. The motors coordinate with universal eccentric and adjustable amplitude vibrator. When the two motors start to work, the vibrators move reversely at the same time. The centrifugal force is generated by the eccentric blocks superpose themselves and form a single direction vibration. The high frequency drives the screen move back and forth in line repeatedly. So the sand will be dehydrate and filtered.


Rotary dryer:
Material to be dried enters the dryer, and as the dryer rotates, the material is lifted up by a series of internal fins lining the inner wall of the dryer. When the material gets high enough to roll back off the fins, it falls back down to the bottom of the dryer, passing through the hot gas stream as it falls. This gas stream can either be moving toward the discharge end from the feed end (known as co-current flow), or toward the feed end from the discharge end (known as counter-current flow).


What’s the final products?
Processed by dewatering screen
Final water content down to 12%-15%, which is no dripping, can be loaded directly.


Processed by rotary dryer
Final water content can down to <10%, it is mainly aim to several kinds of ores.