World Grain - December 2010 - 71
TECHNICAL PROFILE: POULTRY FEED PRODUCTION
the positive and in the negative sense.
The selection of the raw materials is
usually dictated by global market prices. Production managers rarely have a
chance to influence this factor. On the
other hand, a good production manager
or maintenance manager has direct control over the condition of the production
equipment. They can decisively reduce
plant downtimes by careful, preventive
maintenance.
DIFFERENT CRITERIA
Practice teaches that the fineness of
feeds does not say anything about the
product quality. "The finer, the better!"
has ceased to apply. In other words, it
does not matter whether a feed is pelletized after its particles have been reduced or whether it is processed into
feed meal. What does matter is careful
processing in the roller mill.
Needless to say, certain physical prin-
ciples must be taken into account. Thus,
it is not possible to reduce a feed to a
particle size of three millimeters and
then to process it into pellets of the
same size. This would result in a very
high breakage rate and thus in high pellet abrasion.
In selecting and specifying a roller
mill, the following questions must be
answered:
* What hourly grinding rate is
necessary?
* What particle size (mean particle
size, particle size distribution) has to be
obtained?
* What product formulations are to
be produced?
* Is a final screening stage required?
* Will the pre-grinding or postgrinding process be applied?
* Will a double or triple roller mill
be used?
* Might a combined grinding system
For more information, see Page 78.
www.World-Grain.com / World Grain / December 2010
- that is, a roller mill in conjunction
with an intermediate screening stage and
a hammer mill - be the best solution?
Before any capital investment is made,
a number of additional questions must also
be answered. The installation situation is
usually no problem. If an existing conventional hammermill is to be replaced,
the space available for accommodating a
roller mill will normally be adequate.
Once a careful prior analysis has
been conducted of the current condition of an existing grinding system,
and once the goals have been clearly
defined, success will be all but inevitable after a rebuild.
Andreas Schultz is head of center of
competence for Buhler's Feed & Biomass unit,
Braunschweig, Germany. He may be contacted
at andreas.schultz@buhlergroup.com
We want to hear from you - Send comments and
inquiries to worldgrain@sosland.com. For reprints of
WG articles, e-mail reprints@sosland.com.
For more information, see Page 78.
73
http://www.World-Grain.com
World Grain - December 2010
Table of Contents for the Digital Edition of World Grain - December 2010
Contents
World Grain - December 2010 - 1
World Grain - December 2010 - 2
World Grain - December 2010 - 3
World Grain - December 2010 - Contents
World Grain - December 2010 - 5
World Grain - December 2010 - 6
World Grain - December 2010 - 7
World Grain - December 2010 - 8
World Grain - December 2010 - 9
World Grain - December 2010 - 10
World Grain - December 2010 - 11
World Grain - December 2010 - 12
World Grain - December 2010 - 13
World Grain - December 2010 - 14
World Grain - December 2010 - 15
World Grain - December 2010 - 16
World Grain - December 2010 - 17
World Grain - December 2010 - 18
World Grain - December 2010 - 19
World Grain - December 2010 - 20
World Grain - December 2010 - 21
World Grain - December 2010 - 22
World Grain - December 2010 - 23
World Grain - December 2010 - 24
World Grain - December 2010 - 25
World Grain - December 2010 - 26
World Grain - December 2010 - 27
World Grain - December 2010 - 28
World Grain - December 2010 - 29
World Grain - December 2010 - 30
World Grain - December 2010 - 31
World Grain - December 2010 - 32
World Grain - December 2010 - 33
World Grain - December 2010 - 34
World Grain - December 2010 - 35
World Grain - December 2010 - 36
World Grain - December 2010 - 37
World Grain - December 2010 - 38
World Grain - December 2010 - 39
World Grain - December 2010 - 40
World Grain - December 2010 - 41
World Grain - December 2010 - 42
World Grain - December 2010 - 43
World Grain - December 2010 - 44
World Grain - December 2010 - 45
World Grain - December 2010 - 46
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World Grain - December 2010 - 73
World Grain - December 2010 - 74
World Grain - December 2010 - 75
World Grain - December 2010 - 76
World Grain - December 2010 - 77
World Grain - December 2010 - 78
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