Pit & Quarry, January 2016

OPERATIONS case of a fault the systems may minimize or eliminate mechanical and thermal damage to shorted transformer and rotating machinery windings Capacitors that are part of the electrical system make electric usage more efficient Capacitors work in a way similar to the backup on an alarm clock which keeps the clock running for a limited time using stored energy and releasing it when the plant draws a temporary electrical surge Guarding safety In its upgrade Dolese addressed safety issues surrounding quarry operations by reviewing its guarding equipment The Mine Safety and Using some of the pits natural topography Dolese placed the new plant at a higher elevation to aid product flow through the process Health Administration requires that moving or rotating equipment or equipment parts be equipped with guards when in use Moving parts included in the regulation include belts gears shafts pulleys sprockets spindles drums flywheels chains and other reciprocating rotating or moving equipment parts exposed to employee contact One of Doleses considerations was how to design effective guards that were mobile enough to avoid injury to employees who needed to move remove or replace them We wanted to keep guard weights down to 50 lbs or less Colijn says That way they can easily be lifted and moved for servicing without risking injury We werent able to keep 100 percent of our guards under that weight but we contracted with the company that constructed our plant to fabricate the guard structures according to our specific needs Most of the guards were made using expanded metal with a thin metal frame and lifting handles The guards are typically hung from brackets attached to the structures Ongoing success In addition to greatly improving product processing the Dolese Hartshorne upgrade has increased flexibility of the mining process there Dolese which originated in Chicago was developed by brothers who owned a road paving operation The brothers anticipated finding better work opportunities in the aggregate business which brought them to Oklahoma in 1902 In the 1950s Dolese moved its main office to Oklahoma Our company has been pretty successful at the quarrying business since 1902 Helm says We have great employment stability in the Hartshorne area serving as one of the biggest employers there We expect to supply rock and stone products to customers in that region for many decades to come P Q Loretta Sorensen is a freelance writer in Yankton S D She produces material on a variety of topics serves as a ghostwriter and has authored her own books LIBRA WEB SERVICES Mobile connectivi ty for the aggregate industry Automatic Text Email Notifications Real Time Drill Down Reports Secure Access For Your Customers Online Quoting librasystems com 2152561700 Set ting the Standard In Automation Business Integration Vision Instantels new cloud based hosting application for vibration monitoring information gives you instant access to your data Anywhere Whether youre behind your PC at your desk or in the feld on your tablet Vision delivers the info you need giving you true insight into your data https vision instantel com 52 PIT QUARRY January 2016 www pitandquarry com