Combined Drying/Cleaning drums from Allgaier are of single-shell design. This innovative drum design is a combined system in which the drying and cleaning of surface-contaminated minerals take place in a single unit. Therefore, only one drive and one bearing is required in each case. The plant is particularly suitable for the surface cleaning of coarse-grained, crushed rocks such as clay-contaminated limestone.
Functionality:
In the front section of the Combined Drying/Cleaning drum, the moist, surface-contaminated bulk material is dried very efficiently in co-current. A separate cleaning zone, enlarged in diameter, is located immediately behind the drying zone. Due to the special design of the internal internals in this area, the pre-dried, contaminated bulk material is intensively and dynamically mixed within itself.
As a result of the mutual, moving frictional contact between the particles, the adhering layer of dirt is very effectively removed from the actual rock (useful grain). The resulting fine-grained dirt abrasion is partially sucked out of the drum; remaining dirt dust is separated from the actual rock in subsequent screening stages.
Benefits:
– High performance: No separate cleaning unit required due to combined design.
– Compact design: Compact dimensions and thus smaller footprint compared to wet cleaning.
– High efficiency: Minimal operating costs for the drying and cleaning preparation stages.
– Maximum efficieny: Cleaned rock material is already available in a dry state for further refinement.
– High safety: Frost-proof system, as no washing water and thus no water treatment are required.
