Milling Journal - Q4 2008 - (Page 28) Material Blending Not as difficult to calculate as you might think. Calculating the expected or target attribute level of a material mixture is commonplace in many grain, feed, and food processing applications. We often use the same methods to Blending of grain to calculate the average value of Product Quality achieve certain measurable different combinations of meal characteristics such as costs or average cost per person protein or moisture is no when dining out with friends. different than calculating the Sometimes, however, the blend of two flours to achieve burden of formal calculation to a target ash level. ensure accuracy and correctness We use blending formulas often causes unnecessary to describe mathematically anxiety. the composition of a two or The purpose of this article more-part mixture of is simply to provide a few examples and describe a Dr. Jeff Gwirtz material. thought process that will allow A General Blending Problem the mill operative to check his or her A general blending problem is shown work. in Figure 1 (see page 29), Before you stop reading let’s discuss the funny symbols and allow a few examples before you give up. Using the process defined below we can calculate with each product addition the level of a specific attribute in the mixture. Definition of Terms “Q” Definition: QN represents the quantity of the Nth ingredient in the mixture. All units of Q must be the same, pounds, bushels, ton, grams, kilograms, Metric Tons, railcars, trucks, buckets, etc. “A” Definition: AN is the attribute of the Nth ingredient in the mixture. All units of A must be the same, percent, parts per 28 Fourth Quarter 2008 Response No. 281 Response No. 282 MILLING JOURNAL http://www.kcsupply.com http://www.kcsupply.com
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