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Mills, Granulators, and Crushers Spotlight - March 09

February 24, 2009

Prebreaker Mill
The Kek Kibbler prebreaker mill is designed to work as a stand-alone mill or in conjunction with other Kek mills. Strong and robust, the unit is designed to demolish large lumps up to 150 mm and reduce them down to 2–3 mm in preparation for further processing. Size reduction takes place through a combination of impact, crushing, cutting, and abrasion as the slow-speed, heavy-duty beater sweeps product against the contoured grinding screen.
Kemutec Powder Technologies, Bristol, PA 215-788-8013 www.kemutec.com

Limestone Grinding Attritor
This custom CL-200 attritor is part of a complete system used to grind limestone for the purpose of flue gas desulfurization. The system includes the limestone storage silo, gravimetric feeder, CL-200 attritor, mill product tank, hydrocyclone feed pumps, and hydrocyclone. The attritor is powered by a 125-hp motor, has a working media volume of 100 gal, and offers a maximum throughput of 16,000 lb/hr of dry limestone. The high-efficiency unit uses approximately 50% less power when compared with conventional ball mills of a similar capacity, thus resulting in substantially lower operating costs.
Union Process Inc., Akron, OH 330-929-3333

Hammer Mill
The Universal Mikro Pulverizer (UMP) has been designed to replace the Bantam as a versatile size reduction apparatus, with different configurations and model sizes available. The UMP features a fabricated housing with a hinged door and tri-clamp closure mechanism. It features interchangeable grinding mechanisms that provide unlimited ability to change particle size and distribution. The unit can be fitted with a knife-type rotor to provide granular products. Mikro impact hammer and screen assembly can be substituted to make finer materials down to 50 µm. The pin disks and a new bearing housing design can run at a top speed of 28,000 rpm to produce products down to 25 µm.
Hosokawa Micron Powder Systems, Summit, NJ 908-277-9205 www.hmicronpowder.com

Twin Shaft Crusher
The Model DC1200 delumper crusher offers powerful twin-shaft crushing capabilities in a compact configuration. It unit-crushes, chops, and destroys lumps, chunks, coal, cement, limestone, and more, which reduces them to their basic grain size. It freshens and enhances product quality and eliminates flow impediments. The unit measures only 8 in. from inlet to outlet. The twin-shaft design produces a high-impact force with low-power usage. The unit features a direct gear drive, one-piece crushing rotors, stationary bar grating, self-cleaning action, a choice of shaft seals, and a durable fabricated housing with machined flanges for easy connections to ducts, hoppers, conveyors, bag unloaders, or systems.
Franklin Miller Inc., Livingston, NJ 973-535-9200 www.franklinmiller.com

Centrifugal Impact Mill
This 24-in.-diam sanitary stainless-steel centrifugal impact mill, or pin mill, for dry or wet bulk solids provides fine-to-coarse grinding of friable materials into controlled particle sizes down to 325 mesh, as well as lump breaking and conditioning of fibrous materials. High-speed rotation of the inner “stator disk”—the only moving part contacting material—creates centrifugal force that accelerates bulk material entering the central inlet of the opposing stationary disk. As material travels from the center to the periphery of the disks at high speed, it passes through a treacherous path of five intermeshing rows of rotating and stationary pins. The desired tight particle-size distribution is obtained by controlling the infinitely variable rotor speed.
Munson Machinery Company, Inc., Utica, NY 800-944-6644 www.munsonmachinery.com

Fine Grinder
The M-series fine grinder is used for grinding dry, free-flowing material as fine as 200 mesh (75 µm) with tight distribution of particle size. It is best suited for heat-sensitive materials such as resins, sugar, and powder coatings. Utilizing a high-speed impact principle, the feed material is metered into the center of the mill where it is impacted by the rotor. The feed material is then thrown outward where it impacts with other particles, which aids in the reduction process. After initial impact, particles are projected across the screen and are sheared between the blades of the rotor and the sizing screen or jaws. This action continues until the particles are properly sized and are discharged through the bottom of the mill. Precision tolerances are maintained between the rotor blades and the stationary grinding surfaces to allow for accurate control of finished particle size and distribution.
Prater-Sterling, Bolingbrook, IL 630-759-9595 www.prater-sterling.com