Aggregates Manager Digital Magazine
Issue link: http://read.dmtmag.com/i/548151
31 AGGREGATES MANAGER August 2015 EQUIPMENT MANAGEMENT Hammer mill operation and maintenance Up running hammer mills combine impact and shear to reduce material. Down running hammer mills primarily use shear by immediately taking feed to the screen or grate bars where hammers shear the material, until it passes through the openings. Requirements for optimum production and wear part utilization include the following: • Lubricate bearings regularly. • Regularly inspection (unclamp or unbolt front upper half housing for access to screens and hammers) liners, ham- mers, hammer bolts, rotor discs, grate bars, and screens. Spares recommendation: • Hammers, • Screens, • Liners, and • Grinding plate. Summary A partnership begins between the manufacturer and the customer when the crusher is installed in the field. The manufacturer needs the customer's help as much as the customer needs the manufacturer's help to achieve the highest performance possible. Maintenance service after the sale, although mentioned last, is a central part of crusher system performance. And just in case, the manufacturer will have the people and the parts available 24/7 to assist with any problems. Regardless of the field application, the training of per- sonnel is key to successfully and optimally operating equipment. For the size-reduction industry, crusher mainte- nance problems are mostly related to inadequate training. This exists at plants both large and small. The most effec- tive education is a current and ongoing program for crews — and that's what will result in legendary performance. AM Article courtesy of Stedman Machine Co. Shoes Table Liner Anvils Discharge Plate Anvil Ring The spare parts inventory shown above is recommended for vertical shaft impactors. In this application, the rotor tubes have been rotated 90 degrees and rotation has been reversed to optimize the life of the wear parts. This operation is getting the most use from its wear parts.