Rock Products

JUL 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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32 • ROCK products • July 2018 who knows about three-phase electricity can troubleshoot or repair it. That's unlike competing makes, in which all of the products are hydraulically driven. And when you have hydraulic problems, they are very difficult to troubleshoot. "And Kleemann's control panels are cushioned with springs, and sealed tight," Boyd said. "They work fabulously. Elec- trical over hydraulic is much easier to troubleshoot, repair and maintain." Interlinked Plants The other great benefit Boyd found was how the jaw and cone crushers are interlinked and communicate with each other. "Via a control wire, the cone 'talks' to the jaw," Boyd said. "The cone sets the pace for the plant. If the cone starts to get too much stone, it tells the jaw to slow down a little bit until it catches up. What's fascinating is that every 20 minutes the cone and the jaw analyze what has happened, and the system gets smarter as it goes on." For example, throughout the day, if the cone determines that it has let the jaw slow down too much, it will adjust for that. "As the day goes on, the plant runs just fabulously," Boyd said. "As the day progresses, and we start to see a little manga- nese wear on the cone or die wear on the jaw, and factors change throughout the day, the plant adapts too. It takes a lot of human error out of the equation." If he sees the recirculating load is rising out of the cone in the closed circuit loop, Boyd can "tighten" the cone via adjust- ment of its closed-side setting. Instead of a grizzly, new Mobicat primary jaw crusher utilizes an independent prescreen that boosts productivity while reducing wear and tear on system from abrasive fines. Feed to cone crusher gets dust suppression. Riverbend

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