FIBRE CLASSIFIER

Usage: for determining the fibre length of pulp by classification.
Standardization: TAPPI and SCAN

Device Description : the Baure Mcnett fibre classifier consists of up to 5 narrow tanks 255mm deep , 127 mm wide and 320mm high,
mounted in a cascaded arrangement , with screens of 335cm2 mounted on the flat side . A vertical , cylindrical agitator with short
paddles rotates at 580rpm near one semi circular end of each tank . this causes suspension to flow horizontally across the screen
and circulate around the tank . an overflow weir is provided at outgoing side of each screen , and a short pipe leads to the next tank
with a finer screen at a slightly lower level , or from the last tank to drain away . A flow regulator supplies water at the rate of 11.35
l/m to the first tank. The motion of the water keeps the water from settling and presents them repeatedly to the screens through
which they will pass if the length is less than twice the screen opening. The primary unit has an inlet funnel with an overflow and the
nozzle for a constant water flow rate. Fractionating unit is completely self contained having its own electric motor for the rotor and
is made of non-corrosive material. Fibre collection box with rapid locking device, support wire and suction connection.
Interchangeable screens are available with wire of 4, 6, 8, 10, 14, 20, 30, 50, 100 and 200 standard mesh. The screen frames are
clamped spring loaded self clamping system. Classifier gives a very low spread in the results with a variation coefficient of less than
1%.