The biggest problem in fine particle
separation is usually blinding of the screen because of the very narrow slots. We've solved that problem by designing and
building a range of screen sieve bends using wires as narrow as 0.5 mm. This creates a
sieve which presents more edges to the flow for superior separation efficiency. With
more slots, it also has more total open area which increases the the sieve's dewatering or
separating capacity.
As a design option, the wires can be slightly tipped backward
which presents an array of even sharper edges for increased separation efficiency.
Fine wire sieves may have to be turned every
day while larger wire sieves designed for heavier or more abrasive materials may operate for very long periods without
turning.
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Despite the inherent design advantages of
our sieve bends, some processes will tend to cause blinding or plugging problems. These can be quickly
solved with mechanical rappers or vibrators. Unlike some systems, our assemblies have the
vibration directed to the frame which holds the screen rather than to the screen
itself. This avoids stresses on the screen which can lead to premature failure through
breaking. The strong, rigid nature of our all-welded screen panels lets you apply
vibration vigorously and and
effectively without risk of damage.
Our sieve bend assemblies are manufactured
as standard units with an included angle of 45 O and a
radius of 1018 mm for the 250 mm wide unit
or a 2032 mm radius for 500, 750 or 1000 mm wide screens. Slot sizes range from 25 mm to
super-fine 25 micron slot for the 120 0 DSM screens. Special order screens can be made
wider to increase capacity; longer to increase effectiveness.
To determine the correct size sieve
assembly, supply us with (1) particle size cut point, (2) feed rate, (3) Solids
concentration and (4) maximum particle
size or size distribution analysis.
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