Pit & Quarry, October 2009

Flexi modular rubber screen panels combined with the engineering and operating parameters of the vibrating screen The Polydeck screen system allows a f lat deck design non blinding performance and accurate sizing Bartok said The Rockydale plant features a VSI operating in a closed circuit A bucket elevator transfers material up 65 ft to the top of the tower to feed the new screening circuit Feed to the screen is approximately 150 to 200 tph of THERE ARE CERTAIN AREAS OF THE DECK THAT WEAR MORE THAN OTHERS ESPECIALLY ON THE FEED END SO ALL WE HAVE TO DO NOW IS CHANGE OUT ONLY THE WORN PANELS RATHER THAN THE ENTIRE DECK THIS WILL SAVE US A LOT IN LABOR AND MATERIALS Benny Hopkins Rockydale operations team crushed limestone with an average top size of 2 in The top deck is fitted with in wire cloth while the middle deck features in wire cloth The bottom deck is fitted with Polydecks 1 ft x 2 ft Flexi rubber panels There are 14 ft of 4 mm opening Flexi panels on the feed end and 6 ft of 3 mm opening Flexi panels on the discharge end According to Polydeck Flexi modular rubber screen panels provide an optimal spring like effect that prevents material from clogging screen openings This the company says results in greater throughput minimum maintenance requirements associated with frequent screen surface clearing and more effective processing of the desired particle size These screen panels have proven to be ideal in high moisture applications such as that of Rockydale Also Polydeck engineers explain that the Flexi Series provides greater open area as each modular panel is engineered in a maxi screen panel design with a very narrow border that minimizes solid surface area buildup Polydeck engineers claim that a Flexi screen system ultimately allows greater screening efficiency even within a smaller screening footprint while running more than 50 percent quieter than S C R E E N I N G S I Z I N G Take note After careful analysis it was found that Rockydale would be able to replace five screens and two conveyors in the circuit with just one well engineered tripledeck screen and the proper screen media Acquisitions@ nrplp com Toll Free Phone Fax 866 973 8886 www nrplp com LAND RESERVES PURCHASE Natural Resource Partners L P a publicly traded master limited partnership is interested in purchasing land surface and mineral rights in the United States and Canada NRP recently acquired and leased back limestone reserves in the Dallas TX area from Blue Star Materials LLC to assist in the development of their new crushed stone operation NRP will also purchase actively mined aggregate reserves from landowners as well as from aggregate producers through a sale leaseback for future royalty payments All cash purchases NRP has the ability to close and fund quickly Funds may be used for recapitalization partner buy out operating capital equipment purchases plant expansion etc 32 PIT QUARRY October 2009 www pitandquarry com