Cement Americas

SUM 2019

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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30 CEMENT AMERICAS • Summer 2019 • www.cementamericas.com FEATURE Continuously Into the Kiln Wheel loaders slowly take out the waste tires from the col- lection point and feed the feeding and sorting box. With a volume of 140 cu. metres, it's big enough to provide enough material for one shift. It is equipped with a moving floor: plate fins that are moved by a hydraulic drive transport the waste tires to the outlet side of the feeding and dosing box. Photocells, mounted at different heights, measure the fill level. When a tire arrives at the discharge side, it is taken over by the hook separator. It then turns upwards and changes the direction at the drive station. The tire falls on a roller conveyor. "The hook separator starts operating only when the roller conveyor sends a release signal and the photocell at the hook separator is free," explained Becker. This prevents the tires from falling on top of each other. Additionally, they lose any water that might have collected inside the tire due to the impact when falling on the roller conveyor, and any dirt is removed. A checking device recognizes if the tires are damaged or if the rims are still on. Those tires are dis- charged from the system. The rotary kiln can be fed with up to 700 tires per hour. The system is equipped with comprehensive checking devices. This includes scanners that monitor if the tires are stacked or if the rims are still inside.

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