Title Effects of impeller angular speed variation on particle size reduction of toasted soya bean seeds
Journal International journal of Engineering And Applied Science
Publisher Faculty of Engineering, Nnamdi Azikiwe University, Awka Nigeria.
Issue 1
ISSN 1119-8109
Pages 29-38
Subject Mechanical Engineering
Date of Publication January 2013

AUTHOR(S) E. C., Oriaku, E.I.E. Ofodile


In size reduction, mechanical forces are applied to split a solid structure into collective of pieces without changing product, the shelf life or process the materials more economically into various end products like meal, flour, feed and other split products. 2kg of toasted soya bean seeds of moisture content 9.03% (db) were milled using a designed and fabricated micro-mill at different angular speeds. The speeds ranged from 1000 to 3000 rpm and each test run lasted 3mins. The milled samples were collected and analyzed. The results showed average particle diameter obtained ranged from 0.58mm to 0.97 mm while fineness modulus ranged from 4.67 to 6.31. The angular speed of 2250rpm gave the best average particle diameter 0.58mm and lowest finest modulus of 4.67 for the intended flour production

Keywords: Size reduction, micro mill, soya bean, particle size, angular speed

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