Rock Products

FEB 2018

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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22 • ROCK products • February 2018 WASHING & SCREENING W ashing and screening circuits must be properly selected, designed and applied – and must be operated under the correct parameters to avoid any costly bottlenecks. For optimum screening, the goal is maxi- mizing capacity without losing quality and efficiency. Recently, a major Tennessee-based concrete producer achieved the latter with the installation of a new fine- tuned washing and screening circuit. The result is a significant increase in production capacities and overall effi- ciencies; and continual improvement in the quality and consistency of the company's products. The family-owned Sequatchie Con- crete Service Inc. is a leading supplier of ready-mixed concrete, commercial and residential block, structural precast products, and more. Serving east Tennes- see, north Alabama and north Georgia, the company maintains 15 locations. Fitting its mission of efficiency and quality performance, Sequatchie Con- crete recently eliminated a washing and screening bottleneck at its Sand Switch Plant, an aggregate-processing facility in Sewanee, Tenn. The challenge was efficiency loss with material and water overriding the deck of an older wash screen, creating flooding issues with the belts and crusher. The plant also faced costly maintenance downtime with the fre- quent changeouts of worn screen media panels and chute liners. Their solution was the installation of a heavy-duty, triple-deck vibrating wash screen manufactured by Deis- ter Machine Co. The new wash screen is outfitted with modular synthetic rubber and polyurethane screen media manufactured by Polydeck Screen Corp. "We gave Deister and Polydeck the specs, gradations and tons per hour that we needed to meet; and they gave us the right screen and media for our Clean & Screen A New Fine-Tuned Washing and Screening Circuit Boosts Throughput and Product Quality. By Carol Wasson

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