Pit & Quarry, August 2018

Machinery Co which maintains its North American manufacturing operations and materials test crushing facilities in Livermore California After working with REMco application engineers D B installed a REMco Model 1530 RockMax vertical shaft impact VSI crusher The success of the crushing circuit led to the recent installation of a new REMco PROscreen Were excited about the results Killingsworth says Along with eliminating bottlenecks and lowering operating costs per ton D B pumped up production volumes by more than 40 percent Killingsworth adds while also significantly minimizing the companys capital equipment investments Cost effiCient operation The material flow at the plant begins with washed material either 57s or pea gravel being fed to a 300 hp RockMax VSI Here material is crushed into a range of products from 1 2 in to 3 8 in minus The crushed material is conveyed to a triple deck 6 ft x 20 ft PROscreen Its a heavyweight well braced screen thats priced very affordably Killingsworth says Killingsworth also likes that the screen is configured for grease versus oil lubrication for ease of maintenance and reduced costs Our previous screen was just worn The success of the crushing circuit led to the installation of a new PROscreen out and we spent more time working on it than running it Killingsworth says Now were seeing productivity and plant uptime With the new screen D B can make three different products at one time By opening a gate or closing a flap we can easily change out products Killingsworth says Were able to stockpile 300 tph of finished products and thats without even putting a full load into the crusher While the previous system produced volumes of less than 1800 tpd the new equipment processes up to 2500 tons of pea gravel each day We can easily put out 10000 tons of 1 2 in material without batting an eye Killingsworth says As for the RockMax VSI it paid for itself within a year and a half according to Killingsworth This VSI is well built and reliable and it has saved us a lot on wear costs he says On the old crusher we had to change out the anvils every eight hours On the new crusher we change out the tips every 100 hours and every 300 hours we pull out the rotor Now by employing economical crushing and screening solutions Dickerson Bowen can effectively retain control over the quality of its asphalt mix providing customers with high quality finished products while meeting budget and Crusher and sCreen speCs After an analysis of Dickerson Bowens application REMco worked closely with the company to provide economical solutions and optimize the crushing and screening circuits for maximum performance Weve engineered the PROscreen for reliable performance says Mike Howell Central Region manager for REMco According to Howell the PROscreen is designed with heavy duty dual coil spring trunnion suspension Its modular mechanism tube and support deck frames are secured by high tensile bots with self locking nuts for easy replacement Additionally the vibrator mechanism features heavy duty double row spherical roller bearings outbound flywheels with adjustable throw weights and personnel guards To meet the requirements of any product sizing application the PROscreen is manufactured in a range of sizes up to 8 ft wide and in lengths up to 24 ft and in one two three and four deck configurations Screen decks are available in single crown doublecrown or flat to suit specific screening needs Regarding the RockMax vertical shaft impactor VSI Howell says it minimizes material recirculation and increases the volume of net finished product with an ideal particle shape because the VSI achieves a high crushing velocity timeframe requirements The companys aggregate processing facilities and asphalt plants are cost efficient and strategically located allowing Dickerson Bowen Constructon to remain a leader in cost effective asphalt paving solutions p Q Information for this article courtesy of REMco pitandquarry com August 2018 pit QUarrY 39