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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www.cementamericas.com • Summer 2019 • CEMENT AMERICAS 31 FEATURE From the control station, the employees can permanently monitor the process. The "good" material is trans- ported from a timing roller con- veyor to a flat belt conveyor with corrugated side walls. It provides a separate compart- ment for each tire. There is a transfer chute in the discharge area of the conveyor. The tires are always guided thanks to the design of the chute. The conveyor transports the combustible material now into the preheater tower. A scale determines the weight of the tire on the conveyor. The result is reg- istered by the control and evalu- ated for the feed regulation of the tires. The tires enter the tire sluice through the inlet chute. An arched chute an a guide plate bring the tires from their hori- zontal to a vertical position. The tires enter the tire sluice one by one. At the rotary kiln inlet, only one of the flap valves is open at a time to avoid heat losses and flashbacks. "First the upper one opens. Then it closes and the lower flap valve opens," said Lehmkühler. The compressed-air tank also ensures that all flaps are closed in case of failure. Ready for the Future Installation and commissioning were completed within the pre- set period. The conveying capac- ity can reach a maximum of 3 tph, approximately 700 tires. Thanks to the new system, Hei- delbergCement can now feed its kiln with the combustible in a continuous stream and faster than before. S Information for this article cour- tesy of The BEUMER Group. For further information, visit www. beumer.com. Tires with rims are discharged. The tires are fed individually to the tire sluice. Photo credits: BEUMER Group GmbH & Co. KG

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