| Résumé | Three dehullers, one with coarse-grit Carborundum stones, one with fine-grit Carborundum stones, and one with medium-grit resinoid disks, were quantitively compared using barley and sorghum as test grains. Power consumption, abrasion rates, and flour color were measured at various speeds and times, and these factors were used to calculate throughputs and extraction rates. The resinoid disks and fine-grit stones gave a more selective removal of the outer layers of the kernels than did the coarse-grit stones and hence a higher extraction rate with an acceptable flour color. Abrasion rates with the resinoid disks and fine-grit stones were lower than with the coarse-grit stones, but this was more than offset by the higher extraction rate in the determination of throughput. |
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