الفهرس 
MATERIALS AND METHODSOnly 14 pages are availabe for public view
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Abstract
This investigation was about mechanism used in forming of grain chaff by pressing and
bonding into
pellets.
A screw-manual pelletizer was used with wheat dust conditioned with water. Pelleting pressure
determining device and four dies were constructed.
Pelleting with no heating made incoherent pellets.
Pellets durability was measured by determining the percent weight of the undamaged pellets after
being dropped ( 10) times of 2m height on a hard surface. Bulk density of the air-dried pellets
rated (391-460) kg/m3. Pelleting pressure was limited with maximum of
4.1 bar.
The addition of lignosulfonate, molasses, glue binders into dust-water mixture improved the pellets
durability. Pellet lengths were (2- 4) em for fat added mixture ,and (5- 11) em for mixtures
containing other
binding agents.
Increasing pelleting temperature 110°C increased the durability index decreased the
specific energy from
kW.h/ton.
from 65 to
by 11% and
8.08 to 4.44
Increasing die hole from 4 to 8 mm reduced specific energy by 42 %, pelleting pressure by 35% and
bulk density by 15%.
Cost analysis of this prototype pelletizer operation
showed 0.48 L. E. per kg dust pelleting cost.
Extension of the pelletizer through dimensional analysis showed 2.51% L.E. per kg dust
pelletization cost by using 0. 5 ton/h capacity pelletizer driven by 13 kW engine with steamed dust
mixed with 5% vinas from ”Sugar Cane Co.”.