The screenless hammer mill, like regular hammer mills, is used to pound grain. However, rather than a screen, it uses air flow to separate small particles from larger ones.
Conventional hammer mills in poor and remote areas, such as many parts of Africa, suffer from the problem that screens break easily, and cannot be easily bought, made or repaired. Thus regular hammer mills break down and fall into disuse. The screenless hammer mill uses air flow to separate small particles from larger ones, rather than a screen, and is thus more reliable.
The screenless hammer mill is claimed to be 25% cheaper and much more energy efficient than regular hammer mills, as well as more reliable.
It was designed by Amy Smith of MIT.
Famous quotes containing the words hammer and/or mill:
“Long lion days
Start with white haze.
By midday you meet
A hammer of heat....”
—Philip Larkin (1922–1986)
“A man who has nothing which he cares about more than he does about his personal safety is a miserable creature who has no chance of being free, unless made and kept so by the existing of better men than himself.”
—John Stuart Mill (1806–1873)