Rock Products

JUN 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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28 • ROCK products • June 2018 Screening General Kinematics General Kinematics was given a chal- lenge. A screen for sizing limestone was sitting more than 100 ft. in the air atop a silo. Due to the difficult access point, it needed to be replaced with a reli- able screen that did not get jammed or need maintenance often. The inquiring company sent their material to General Kinematics to be tested as well as four General Kinematics competitors. General Kinematics loves a tough screening challenge. Over the last 60 years of innovations and field experi- ence, General Kinematics developed a finger deck capable of self-relieving sticky materials. The experts in the General Kinematics R&D Lab knew this screen would be a perfect solution. The lab results proved General Kine- matics's theory that the finger decks would separate the limestone better than a normal punch plate deck over a mesh screen. Due to the softness of the fines mesh, screens tended to jam up. This led GK engineers to design the STM-Screen Two-Mass Vibratory Screen with a large finger screen deck staggered over a smaller finger screen allowing materials to wriggle free in either deck. The General Kinematics STM-Screen Two-Mass Vibratory Screen was installed on top of the silo and is running smoothly. It has decreased downtime and required fewer trips to the top of the silo. The maintenance team is happy with its new screen and improved pro- cessing power. Haver & Boecker Haver & Boecker offers the Tyler L-Class vibrating screen for classifying wet or dry material as well as an ideal dewa- tering method. The compact machine is versatile and easy to maintain, with no timing belts or gears that normally need replacing. Producers can customize the 6-ft.-wide machine in two lengths, a 16- and 20-ft. length. Primarily mounted horizon- tally, the L-Class can also be inclined or declined as much as 3 degrees. The linear L-Class handles up to 400 tph

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