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Bradley Hercules
Airswept Mills

• Unique over - driven design means low investment.
• More Tons out - less HP in.
• Robust construction means low vibration - low maintenance

Integral System The Hercules Airswept Mill system allows grinding, classifying and drying to take place simultaneously. Pulverized material from the grinding zone is carried by the air stream to a separator mounted directly above the mill. From it, product-size material is carried to a collection cyclone while oversize particles are rejected and recycled for further grinding. The conveying air stream can be heated to flash dry the material being ground. Most of the conveying air stream is recycled, with only a minimum amount being exhausted through the dust collector system, which is designed to remove the excess amount of air and water vapor and maintain the system under negative pressure to ensure a dustfree operation. Performance of the system is continuously monitored using automatic controls to maintain optimum grinding and drying conditions.

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Types of Separators Several type of separators allow optimum equipment selection for particular applications. Static separators are rugged, are simple in design, have no rotating parts and use no power. The inverted cone type is used for coarse grinding, the double cone type for fine grinding. Dynamic separators permit instant adjustment and provide wide flexibility of operation. They produce cleaner top size cuts for finer grinding applications. Note particularly that the Bradley RMC separator can produce extremely fine powders direct from the mill: Top size of 100% passsing 30 microns has been achieved routinely.

Reliable Design Hercules Mills are designed to give many years of trouble-free operation even in severe service.

• Access to wear parts is at ground level changes are quick and easy to make.
• Heavy duty spiral bevel gears allow extended operation between overhauls.
• Recirculating lube system is powered by an externally mounted pump, safety trips protect against failure.
• Roll assemblies are kept free of dust by a simple, highly reliable air purge system.

Operation: The standard size of Hercules Airswept Mills cover the range of 1 to 100 tons per hour. Product fineness requirements can vary from 50% passing 100 mesh to 100% passing 30 microns. Feeds containing up to 15% moisture can be dried-in-circuit to yield products with less than 0.1% moisture. The complete systems are engineered to guarantee many years of trouble-free operation and to outperform all competitors.

Typical Mill Specifications Mill Fan Motor Motor Maximum Relative Model (HP) (HP) Feed Size Output -------------------------------------------- BPH-3 25 20 1/2" 3 BM-6 75 60 3/4" 9 BPH-8 100 75 1" 12 BM-14 200 120 1 1/4" 25 BPH-10 350 250 1 1/2" 45 BM-30 500 350 1 3/4" 65 BM-50 750 500 2 1/4" 100

This page was prepared and written by AdNet Services, Inc. 1998.
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