Feed Strategy - November 2019 - 37

FeedStrategy ❙ 37

Figure 2: Influences of increasing
particle size, compression ratio, roll
gap, temperature, retention time and
pellet mill size on the granulation in
pellets: First line: the grinding effect
increases with (1) increasing particle
size, (2) increasing compression
ratio, (3) increasing roll gap. Second
line: the grinding effect decreases
with (4) increasing temperature, (5)
increasing retention time and (6)
increasing pellet mill size.

rolls works like an elongation of
the active die length. Therefore, the
increased roll gap acts like a higher
compression ratio. The particles are
pre-compacted by repeated overrunning by the rollers before the feed
is forced into the die holes. These
compressive forces increase with
larger gaps, and the grinding effect
is intensified.

Temperature
The conditioning temperature is
regulated by the addition of steam.
The added steam condensates when
it comes into contact with the colder
surface of the product. Therefore,
temperature and moisture are
linked: With increasing temperature,
the moisture content also increases,
which is why more moisture is available, making the particles softer
and more elastic. Furthermore, the
moisture acts like a lubricant in the
die hole, reducing friction forces and
abrasion. Altogether, the grinding
effect can be reduced by an increase
November 2019 ❙ www.FeedStrategy.com

in temperature mainly caused by the
related increase in moisture.

Retention time
After conditioning, the particles are

kept at a constant temperature and
moisture level during retentioning.
The moisture on the surface of
the particles is absorbed during
the retention time. With longer


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Feed Strategy - November 2019

Table of Contents for the Digital Edition of Feed Strategy - November 2019

Feed Strategy - November 2019
Contents
In the Mix
FeedStrategy.com
Climate change and animal feed: mycotoxin risk mitigation
How to adapt to the changing mycotoxin landscape
Scientists seek new ways to combat spread of mycotoxins
Feed additives that will succeed in 2020 and beyond
Marketing nutrition by extending credit
More feed, fewer mills: feed industry consolidation
How to target protein content in late-lactation cow diets
Critical junctures in early chick nutrition confi rmed
How pelleting influences particle size in animal feed
Products
Advertisers’ Index
Feed Strategy - November 2019 - CT1
Feed Strategy - November 2019 - CT2
Feed Strategy - November 2019 - Feed Strategy - November 2019
Feed Strategy - November 2019 - Cover2
Feed Strategy - November 2019 - CT3
Feed Strategy - November 2019 - CT4
Feed Strategy - November 2019 - Contents
Feed Strategy - November 2019 - In the Mix
Feed Strategy - November 2019 - FeedStrategy.com
Feed Strategy - November 2019 - Climate change and animal feed: mycotoxin risk mitigation
Feed Strategy - November 2019 - 5
Feed Strategy - November 2019 - 6
Feed Strategy - November 2019 - 7
Feed Strategy - November 2019 - How to adapt to the changing mycotoxin landscape
Feed Strategy - November 2019 - 9
Feed Strategy - November 2019 - 10
Feed Strategy - November 2019 - 11
Feed Strategy - November 2019 - Scientists seek new ways to combat spread of mycotoxins
Feed Strategy - November 2019 - 13
Feed Strategy - November 2019 - 14
Feed Strategy - November 2019 - 15
Feed Strategy - November 2019 - Feed additives that will succeed in 2020 and beyond
Feed Strategy - November 2019 - 17
Feed Strategy - November 2019 - 18
Feed Strategy - November 2019 - 19
Feed Strategy - November 2019 - 20
Feed Strategy - November 2019 - 21
Feed Strategy - November 2019 - Marketing nutrition by extending credit
Feed Strategy - November 2019 - 23
Feed Strategy - November 2019 - More feed, fewer mills: feed industry consolidation
Feed Strategy - November 2019 - 25
Feed Strategy - November 2019 - 26
Feed Strategy - November 2019 - 27
Feed Strategy - November 2019 - How to target protein content in late-lactation cow diets
Feed Strategy - November 2019 - 29
Feed Strategy - November 2019 - 30
Feed Strategy - November 2019 - Critical junctures in early chick nutrition confi rmed
Feed Strategy - November 2019 - 32
Feed Strategy - November 2019 - 33
Feed Strategy - November 2019 - How pelleting influences particle size in animal feed
Feed Strategy - November 2019 - 35
Feed Strategy - November 2019 - 36
Feed Strategy - November 2019 - 37
Feed Strategy - November 2019 - 38
Feed Strategy - November 2019 - Products
Feed Strategy - November 2019 - Advertisers’ Index
Feed Strategy - November 2019 - Cover3
Feed Strategy - November 2019 - Cover4
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