Publication Date : 01/02/2010

Author(s) :

Nalado, D.D..

Volume/Issue :
Volume 5
Issue 1
(02 - 2010)

Abstract :

The existing IAR maize dehusker sheller uses a peg type cylinder, which works against a stationary concave screen. Dehusking and shelling are achieved by a combination of impact and rubbing action occurring when fast moving pegs strike the ear cob and force it to flow over the concave. Separation is achieved by the action of gravity and centrifugal force. The sheller was evaluated for its performance. All performance tests were conducted at 9 % moisture content, wet basis. A combination of five levels of speed and three feed rates was used in a completely randomized block experiment to assess the performance parameters. The best performance combination was found to be at the cylinder speed of 950 rpm and a feed rate of 60 kg/min. This gave an output of 869.27 kg/h, a shelling efficiency of 99.52 %, a cleaning efficiency of 97.96 %, a scatter loss of 11.94 %and a grain damage of 2.78 %.

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