Rock Products

MAY 2019

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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48 • ROCK products • May 2019 EQUIPMENT & TECHNOLOGY SCREENING & SIZING For more than 180 years, McLanahan has been designing and manufactur- ing washing and crushing equipment. Now, they are putting their proven, well-established solutions into modu- lar, containerized systems. McLanahan showed them to the market for the first time at bauma 2019. The UltraWASH is capable of making three aggregate and two sand prod- ucts while accepting capacities up to 400 tph. It has both a single-process water feed point and a single-effluent discharge point. The modular design is containerized, leading to a compact footprint. All modular systems from McLanahan come pre-wired and pre-plumbed for rapid on-site deployment or reloca- tion. They are available in a variety of configurations, including double washing and prewashing, and come with fully integrated controls with remote operation. For the UltraWASH, specifically, the system includes several features to simplify maintenance and maximize production. The underpan of the sizing screen features a patent-pending fines forward slide. This steel tray spans the width of the bottom deck of the sizing screen and facilitates the diversion of a proportion of raw fines into the coarse sand processing stream to help balance downstream equipment and optimize plant capacity. It also permits the alterations of the proportions of fine and coarse deck areas above while precluding entry of coarse material into the fines processing stream. A patent-pending EZE-Riser lifting pedal and locking mechanism allows for simplified feed pipe disconnection and the needed clearance for pump removal when maintenance is required. The pumps can then roll out easily onto the pump trolley system, which for additional clearance for easier access during maintenance. Thanks to McLanahan's recent acqui- sition of Anaconda Equipment, the UltraWASH feed hopper and conveyor can be upgraded to come with tracks for easier conveyor maintenance. The UltraWASH line is available with several configurations and add-ons including: •  Feed preparation – log washers, blade mills, screw washers. • Attritioning. • Organics removal. • Water treatment – filter presses and thickeners. McLanahan Corp., Van Tongeren GIC a Hit for Luck Stone Score one for water conservation. Luck Stone recently upgraded the classifica- tion system at its Goose Creek Plant in Leesburg, Va., to a breakthrough dry process system that eliminates the need for water. Called a Gravitational Inertial Classifier (GIC), the system uses only ambient air and gravity to remove fine parti- cles under 75 µm from clean, crushed stone, saving upwards of 22.5 million gal. of water required annually at plants using the traditional wet process. The dry process also eliminates the need for settling ponds and allows the fine particles to be recovered and sold as an additional revenue stream. "The GIC from Van Tongeren is a fine example of an environmentally friendly approach that also reduces costs throughout the supply chain," said Steve Demeyer, process management manager for Luck Stone. "We just feed the material and let gravity and airflow do the rest. It has performed flawlessly since startup." Processing 60 tph of #10 screenings, the GIC features a proprietary design that passes a current of air through a curtain of falling material then directs each par- ticle towards a series of vanes set based on the desired cut point. On-spec parti- cles are discharged onto a conveyor as air-scrubbed manufactured sand and entrained fine particles are recirculated in an eddy current until discharged and captured by a dust collector. The pneumatic classification system is achieving 5% to 7% fines passing at 200 mesh running unattended in 24/7 oper- ation. Designed with no moving parts, the automated system needs virtually zero maintenance. "Our GIC has performed exactly as promised, our operators are very pleased and support from Van Ton- geren has been superb," said Demeyer. "I'd strongly encourage people involved in manufacturing sand to take a look at this technology." Van Tongeren America, McLanahan Launches Ultrawash Seen at bauma

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