World Grain - February 2015 - (Page 82)

FEED OPERATIONS Upgrade ideas for your feed mill A look at a possible new test to gauge the uniformity of mixed feed ingredients by Fred Fairchild Editor's note: This is the second in a series of articles by Fred Fairchild on ways to upgrade feed mills. The World Grain and more articles on this topic will appear in future issues of the magazine. Almost 15 years ago, Kansas State University released information, through trade journals, regarding validation of testing and identifying the moisture content in mixed feeds plate was installed in the end of ribbon mixer and when the product was fully mixed, by time standards recommended for the type of mixer used, the plate and the control system with it was able to accurately determine the moisture content of the mixture. Using this moisture, tests were run adding various amounts of additional water to the mix to determine the affect the moisture would have on the quality of the pellets made. It was found that consistent PDI's could be maintained for similar mixes of ingredient to be pelleted. This testing was done usAgriChem, Inc. of Ham Lake, Minnesota, U.S. POSSIBLE NEW APPROACH TO MIX UNIFORMITY The accepted standard for testing the uniformity of cient of variation between samples taken from a feed at some type in the mix, stopping the mixer after mixing for a in the mixer and comparing the strength of the marker from each location and determining the variation of the marker strength for the locations. the mix was considered adequately mixed. This testing method from different locations in the mixer. The most commonly 82 used marker was the amount of the salt, and a Quan-Tab test was run on each sample to determine the concentration of salt in each sample and its variance with the other samples taken at that time. This method takes time and is highly subject to human error. The Cv value is basically an index of mixer efAn outcome of the mixture moisture testing developed for the previous pellet quality study has also shown that the uniformity of a mixture of a feed formula occurs when the moisture in the mix becomes uniform. All of the different ingredients in a mix initially have their own moisture content, and the blending and mixing of these ingredients then becomes a uniform moisture as the mix is blended. An on-line mixing sensor mounted in the end wall of a mixer allows mixing time to be monitored and the mixer to be controlled in real time, according to David Greer, president of AgriChem Inc. The theory behind this test suggests a possible new approach to determining mixing thoroughness. The dielectric signal sent from the plate sensor has three components that can be calibrated and accurately measured: moisture, density and temperature. According to experiments recently conducted by AgriChem, Inc., for which a patent is pending, moisture has the greatest affect. When ingredients are added to a mixer, each has its own moisture content. At the beginthe sensor plate and the sensor senses their individual moisture content. This causes an erratic signal to be sent to the control system readout. Further mixing causes the individual ingredient responses to disappear and generates a new signal characteristic of the mixture. When this value reaches a steady state, it is possible to determine that the ingredients are fully mixed or blended. AgriChem conducted an experiment to determine if this approach would work for measuring completeness of mixing a February 2015 / World Grain /

Table of Contents for the Digital Edition of World Grain - February 2015

World Grain - February 2015
Table of Contents
From the Editor-in-chief - Easing embargo on Cuba a world gain
Calendar of Events
119th Annual IAOM Conference and Expo
News Review - NIBULON reports record grain, oil crop exports
Nidera building silo on Danube in Romania
Algeria’s cereal imports increase by $3.5 billion
ADM strengthens Unilever relationship
Cargill’s net earnings up 41%
Grain, biofuel shipments surge at Port of Prince Rupert
CHS reports 56% increase in first-quarter earnings
KSU names Grain Science and Industry Department head
Port of Paranaguá sets record for grain handling
Bullish economics may force grain prices lower
IGC forecasts world wheat production at 701 million tonnes
Carr’s Milling profit up on strong performance
Bay State Milling expanding in Arizona
AGRANA earnings drop 25%
Canada introduces act to modernize grain industry
Grain Market Review - Rice
Country Focus - Syria
Feature - Ethiopia Striving for Grain Surpluses
Feature - CWB Taken off Life Support
CWB's Asset List
Feature - Europe's Largest Port Keeps Growing
Deep History
Feature - Grain Experts Analyze Black Sea
Feature - Investment analysts guarded about 2015
Feature - Another year of advances
Rice Quarterly - Milling Properties of Commingled Rice
Vietnam’s outlook for rice exports mediocre for 2015
Myanmar’s rice exports to China surge
African countries focus on boosting rice production
Thai rice exports to dominate
Feature - U.K. Milling Industry checking for soy in flour
Feed Operations - Upgrade ideas for your feed mill
Feature - Comparing Major Soybean Exporters
Feature - The importance of Landscaping
Feature - Global feed tonnage increases
Supplier News
Product Showcase
World Grain Archive
Ad Index/Reader Information Form International Faxback Program

World Grain - February 2015