World Grain - May 2021 - 38

FEED QUARTERLY: FEED OPERATIONS

and screen area for hammermills must be appropriately
matched with the connected horsepower motor. As for
roller mills, the motor horsepower needs to be paired with
the roll surface area. Energy costs for grinding corn typically range from 15¢ to 25¢ per ton but can increase to a
range of 70¢ to $1.40 or more per ton when fine grinding. It is important to remember that properly maintaining grinding equipment can save the feed mill roughly
$50,000 a year in electrical cost when producing approximately 500,000 tons of feed, according to a study by feed
milling equipment manufacturer California Pellet Mill.
When feed mills have a pelleting line, this requires a
boiler to provide steam for the conditioning process. Boilers require fuel to operate, therefore becoming an energy
cost. However, maintaining boiler efficiency can help
conserve the amount of energy required. Having scaleon tubes or sooted tubes and improper burner settings are
one of the main reasons typically observed for boiler inefficiencies. Monitoring boiler efficiencies could lead to
potential cost savings. Monitoring boiler stack flue gas
emissions and stack flue temperature could identify problems or potential inefficiencies. If measuring stack or flue
temperature, the goal is to make sure it does not exceed
100ºF of steam temperature. In addition, energy can be
conserved by making sure the fuel temperature matches
the burner manufacturer's recommended fuel specification, according to a paper in a 2005 American Feed Industry Association publication.
Air compressors are another piece of equipment found in
	

May 2021 / World Grain / World-Grain.com

Photo courtesy of Bühler.

An advantage roller mills, such as this Bühler model, have
over hammermills is they consume less power.



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World Grain - May 2021

Table of Contents for the Digital Edition of World Grain - May 2021

World Grain - May 2021 - Intro
World Grain - May 2021 - 1
World Grain - May 2021 - 2
World Grain - May 2021 - 3
World Grain - May 2021 - 4
World Grain - May 2021 - 5
World Grain - May 2021 - 6
World Grain - May 2021 - 7
World Grain - May 2021 - 8
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