Cement Americas

WIN 2018

Cement Americas provides comprehensive coverage of the North and South American cement markets from raw material extraction to delivery and tranportation to end user.

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www.cementamericas.com • Winter 2018 • CEMENT AMERICAS 17 FEATURE Cleaner Installation Martin technicians concluded that the #14 conveyor was an excellent candidate for the Martin CleanScrape Prima- ry Cleaner. It requires considerably less space than oth- er primary cleaners, can be effective enough to eliminate the need for a secondary blade, and is proven to deliver as much as 4x the lifespan of competing urethane blades. The flexible cleaner is installed diagonally across the dis- charge pulley, forming a three-dimensional curve beneath the discharge area that conforms to the pulley's shape. The unique design incorporates a matrix of tungsten car- bide teeth and is tensioned lightly against the belt to pre- vent damage to the belt or splices. Despite extremely low contact pressure, it has been shown to remove as much as 95 percent of potential carryback material. Designed for belt speeds up to 780 fpm (4 m/s) for mechan- ically spliced belts, pulley diameters up to 50 in. (1270 mm), and belt widths up to 96 in. (2438 mm), the CleanScrape is engineered to perform under the punishing conditions of cement applications and other bulk handling industries. The patented design requires very little maintenance. The tensioners are tightened during initial installation, and typically no further adjustment is required over the life of the blade. Results As cargo with a moisture level of 10 to 15 percent was load- ed onto the belt, dust and fines built up into a thick paste as usual, but ended up being fully removed from the belt. "For this application, we were very surprised by how well it worked," Accomando said. "The return side of the belt might have a little bit of wet material still on it, but nothing even remotely close to what it used to be." After a full year of punishing a 24/7 operation with little downtime through conditions that included cold slush and mud, as well as hot and dry dusty material, the original Limestone and other raw material taken from trucks and barges is stored in outdoor piles.

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