Aggregates Manager Digital Magazine
Issue link: http://read.dmtmag.com/i/756888
OPERATIONS ILLUSTRATED OUR EXPERTS Fines Recovery December 2016 Dean Fogal is superin- tendent for Valley Quar- ries' Mt. Cydonia plants. Valley Quarries Inc. is a subsidiary of New Enterprise Stone & Lime Co., Inc., and is based in Chambersburg, Pa. Tim Cassibo is opera- tions manager for Port Colborne Quarries Inc. (PCQ) in Port Colborne, Ontario, Canada. PCQ has been a division of Rankin Construction Inc., based in St. Catharines, Ontario, since 2007. Jarrod Rice is the aggregates manager for Derrick Equipment Co. He has worked for Derrick since 2012, and has held various roles in the company's technical and commercial depart- ments during that time period. He is a graduate of the University of California, Davis, with a degree in mechanical engineering. Capturing and dewatering ultra-fi nes provides not only sound environmental practices, but can lead to reduced costs and greater profi tability. From pond, swimming pool, or septic system liners to paint fi llers to golf course sub-base to aglime to crop dust to live- stock bedding and more, producers are fi nding a wide variety of uses for their captured and dewatered fi nes. Producers should take some time to research markets for their ultra-fi ne material, and train their sales team to sell this valuable material. overfl owing from the sand screw enters a cyclone feed pump, water spins much like a tornado, throwing larger material where the -200 x 500 mesh material is stockpiled as a clean cyclone feed pump. The ultra-fi ne material (-500 mesh) rises water and overfl ows into a thickener, which consolidates it. wash system; the consolidated underfl ow then enters a into stackable and conveyable form. The most traditional and common method for dealing with fi nes is to send them to a series of settling ponds. In these ponds, as a result of gravity, the fi ne material eventually settles to the bottom of the pond. Because of the maintenance involved with ponds, and the fact that the aggregates industry has increased its efforts toward better sustainability, many producers have begun to use additional methods – or other methods entirely – to allow for reduction/elimination of ponds, capturing reusable water and fi nding a use for ultra-fi ne material. Many operations are beginning to employ equipment such as hydrocyclones, dewatering screens, clarifi ers, thickeners and fl occulants, centrifuges, and presses to capture ultra-fi nes, as well as reclaim/reuse wash water. In many of these cases, producers have been able to reduce the size and number of settling ponds at their operations – and in some cases, producers have com- pletely eliminated them. At the same time, the ultra-fi ne material is ultimately captured and can be stockpiled for haulage and/or reuse. Settle down Capture those fi nes Finding a market 2 3 5