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Hammermill reduces particle size

November 17, 2008
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New energy saving Evolution Hammermill design first pre-breaks incoming material against staggered rows of cutting plate slots to reduce whole product into course mash before screen contact. The pre-break repetitive impacting produces a much finer grind through any perforation than the screen alone could produce without cutting plates. The Evolution grinding chamber is shaped following the cutting plates, so material is initially released into a tight 3/16” hammer tip to screen clearance where acceleration is retarded to enhance grinding action. Following this combined pre-breaking impact and close clearance accelerated grinding, at 900 of circumference the shaped chamber straightens to open hammer tip to screen clearance to 7/16” and significantly improve finished particle egress out of rotation. Compared to any conventional hammermill designs, the Evolution’s pre-break and close clearance enhanced grinding action replicates particle distributions though up to two larger perforation sizes. For a finished particle distribution of 85% minus 14 mesh, 80% plus 60 mesh grinding #2 yellow dent corn at 12% to 14% moisture, most US ethanol plants are designed around 35 TPH (31.75 MTPH) of capacity per hammermill. To meet that specification and capacity a conventional 38” diameter hammermill use 1/8” (3.17 mm) Perf screens and 250 HP 1,800 RPM drive motors. The 40”diameter Evolution Hammermill can replicate that particle distribution through 3/16” (4.76 mm) Perf screens with a 200 HP 1,800 RPM drive. On a 24 hour, 7 day/week operating schedule at the lowest kw cost, that 50 HP savings is worth over US $20,000.00 annually per hammermill.

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