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Product news
17.07.2019  |  6323x
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Economic transportation of cement clinker

BEUMER Group offers robust belt apron conveyors

Robust apron conveyors (SZFs) are used in cement plants to transport clinker safely and economically from the kiln cooling system to the silos. Beumer group is the only manufacturer who offers a special variant, the belt apron conveyor (GSZF): Using a belt instead of a chain as traction element allows higher speeds and a slimmer design while still delivering the same level of performance. The GSZF is therefore particularly suitable for modernisations.
In general, the clinker comes out of the cooler at 80 degrees plus ambient temperature. But during the process, a so-called kiln flash can occur caused by a raw meal flash from the preheater tower or by caked clinker coming off the kiln: Within a few seconds several tons of raw meal or clinker shoot through the cooler. The material to be conveyed cannot cool down sufficiently and reaches the conveyor at temperatures of 500 to 800 degrees Celsius.
With its apron conveyors, Beumer group provides robust and reliable solutions. The specific design of the cells allows safe, low-friction transportation of any hot material. Sealed and overlapping side walls and bottom plates in the cells prevent the clinker from exiting and minimise the escape of dust. The traction element in this conveyor is usually a single or double strand sprocket chain. The system supplier is the only manufacturer on the market who offers apron conveyors with the tried and tested BEUMER steel wire belts from the bucket elevator technology instead of a chain as traction element. Here the cells are attached to the long-lasting, steel-wire reinforced belt in a way so that the heat of the clinker in the steel cells is not transferred to the belt. Partition plates are attached in the feeding area below the cooler and can be easily removed for maintenance, protecting the belt against hot clinker in case of a kiln flash.

One decisive advantage of the belt apron conveyor: with speeds of 0.6 metres per second, it can reach double the conveying speed compared to apron conveyors with a chain. This makes it perfect for retrofitting and modernisations.

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