Internal
recycle decks increase classification rates 60-80%
A new "Twin Kascade" Internal Recycle
model of double-deck VIBROSCREEN® vibratory screener increases
the capacity of circular vibratory screeners employed to scalp
and dedust bulk material, or otherwise classify materials into
three fractions, by 60-80 percent.
The new design differs from conventional
two-deck units in that both conventional screening decks are equipped
with upper "Kascade" Internal Recycle screens having equal mesh
and a 360° annular gap at their periphery.
Maximum capacity is achieved by
feeding the uppermost Kascade deck with significantly more material
than it can screen efficiently. On-size and undersize material
falling through the top Kascade screen bypass the conventional
screen through a central chute for subsequent fine-mesh screening.
The balance of oversize, on-size and undersize material spills
over the Kascade screen's periphery onto the conventional screening
deck, where all oversize material ejects through a spout at the
screen's periphery, and the balance of on-size and undersize material
passes through the screen for subsequent classification below.
Similarly, the finer mesh bottom
screening deck is equipped with a Kascade Internal Recycle screen
of identical mesh. A portion of undersize material passing through
this Kascade screen falls through a central bypass chute to a
bottom discharge chamber. The balance of on-size and undersize
material spills over the Kascade screen's periphery onto the conventional
screening deck that ejects all on-size material through a discharge
spout at the screen's periphery, and passes the balance of undersize
material (typically dust) into the common discharge chamber for
ejection through a spout at the chamber's periphery.
Kascade Series screeners are specified
as new for applications where space is restricted since diameters
are
significantly smaller than those of conventional screeners having
equivalent capacity, or as on-site retrofit kits to increase the
capacity and efficiency (minimized "carry-over" and ejection of
on-size material) of existing screeners at substantially lower
cost than purchasing new equipment.
Kascade Series screeners are offered
in diameters from 40 to 100 inches (1025 to 2550mm) to scalp,
dedust and/or classify up to 100 U.S. tons (91 metric tons) of
free-flowing bulk material per hour.
All models are available to industrial,
food, dairy and pharmaceutical standards, and can be disassembled
rapidly for thorough wash-down.
A range of accessories is available
including anti-blinding devices, and an automatic long-term lubrication
system for gyratory motor bearings.
