Classifying and dewatering machines acts as the size control component of the processing circuit. Traditionally they come after the crusher and grinder phase to ensure the uniformity of minerals. There are several methods to size control however they can be divided into two main categories, these are screening and classification using particle motion.
The hydrocyclone for example utilizes centrifugal forces to classify solids by mass. Larger particles remain closer to outer wall subject to underflow, while smaller particles stay closer to the centre of the chamber, subject to overflow. Alternatively, the vibrating screen uses a grate in a specific geometric pattern to separate material by size.
Dewatering machines such as the drum dryer are also available from Walker Mining, and are another useful component of a processing circuit. A wet slurry can be dried out and further refinement can then continue. Dewatering machines are another form of enrichment and upgrading of a mineral.
Walker mining offers the following classifying and dewatering machines: