World Grain - October 2008 - 77
FEEDOPERATIONS
thing of the past. Some mills still have
slide discharge either at one end of the
mixer or at several points along their
length, but they can lead to incomplete
discharge of mixers, particularly when
mixer blades become worn and a layer
of material is allowed to build up in the
base of the mixing chamber between
the outlet slides.
AIR SUPPLY
Most mixers rely on compressed air
for their operation, and good quality
compressed air supply is essential to
effective operation of bomb doors, inlet slides and diverter valves all associated with the modern day mixing and
blending system. Regular maintenance
of compressors, air lines, dryers and
water traps is essential to a good control system.
Occasionally bomb doors cannot
close properly because of low-pressure
air that is not always detected by sensors. Accurate checking of output batch
weights against desired input weights
will often highlight problems with
batch carryover, invariably traced to
problems with compressed air supplies
not being capable of keeping doors
closed when the full weight of a mix is
being processed.
As always, diligent examination
throughout the mill is paramount, but
nowhere more than at the blending and
mixing stage of the milling process.
Regular checking and perusal of mixing and blending records will show discrepancies and areas that can always be
improved on. Making it the responsibility of one individual to glance through
batch records will pay dividends over
time once the individual becomes familiar with the manner in which records are kept.
Trend analyses are also useful and
can be kept in graphical form, often as
an automatically generated "add on" to
the formulation package. Where the facility can use such analyses as a query
tool within a software package, it can
prove invaluable.
With raw material values rising and
showing no signs of abating, it is increasingly important to be more diligent
about your mill operations. Incorrect
blending and inaccurate mixing can be
expensive, and you must be on top of
the job at all times to survive these difWG
ficult times of world economics.
Jonathan Bradshaw is a consultant to the
agribusiness and food processing industries,
specializing in project management and bespoke
training programs through his company, J B
Bradshaw Ltd. He may be contacted at:
jonathan.bradshaw2@btopenworld.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.
OAVffi
.
�O
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L ]I
.
COMPANY INCOHPOHATBD
4002 Liberty Bell Road
FO
tt , KS 66701
653-3147
Ilco.com
orwll co.com
For more information, see Page 86.
78
October 2008 / World Grain / www.World-Grain.com
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http://www.co.com
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World Grain - October 2008
Table of Contents for the Digital Edition of World Grain - October 2008
Contents
World Grain - October 2008 - 1
World Grain - October 2008 - 2
World Grain - October 2008 - 3
World Grain - October 2008 - Contents
World Grain - October 2008 - 5
World Grain - October 2008 - 6
World Grain - October 2008 - 7
World Grain - October 2008 - 8
World Grain - October 2008 - 9
World Grain - October 2008 - 10
World Grain - October 2008 - 11
World Grain - October 2008 - 12
World Grain - October 2008 - 13
World Grain - October 2008 - 14
World Grain - October 2008 - 15
World Grain - October 2008 - 16
World Grain - October 2008 - 17
World Grain - October 2008 - 18
World Grain - October 2008 - 19
World Grain - October 2008 - 20
World Grain - October 2008 - 21
World Grain - October 2008 - 22
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World Grain - October 2008 - 24
World Grain - October 2008 - 25
World Grain - October 2008 - 26
World Grain - October 2008 - 27
World Grain - October 2008 - 28
World Grain - October 2008 - 29
World Grain - October 2008 - 30
World Grain - October 2008 - 31
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World Grain - October 2008 - 36
World Grain - October 2008 - 37
World Grain - October 2008 - 38
World Grain - October 2008 - 39
World Grain - October 2008 - 40
World Grain - October 2008 - 41
World Grain - October 2008 - 42
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World Grain - October 2008 - 44
World Grain - October 2008 - 45
World Grain - October 2008 - 46
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World Grain - October 2008 - 85
World Grain - October 2008 - 86
World Grain - October 2008 - 87
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