Screening machines for potassium and potash salt

When processing potash, screening machines are initially used during extraction, where the mineral extracted from the mines is crushed and pre-classified. In the further process, screening machines are required in compacting, granulate screening or loading. In addition, screening machines are found in wet classification and dewatering.

Due to their low energy requirements, screening machines are not only suitable for the pure production of saleable products, but can also relieve crushing plants and thus avoid cost-intensive overgrinding.

High capacity screening machines for potash salt

For separations from 2 to 25 mm (10 Me. to 1″), as produced during prescreening, compacting or loading, robust and low-maintenance double-frequency (DF) screening machines are particularly suitable. Due to their special drive principle, they achieve enormous screening capacities with consistently high quality separations.  The special drive concept involves the use of two unbalanced motors with different speeds, which are mounted at the inlet and outlet.

At the inlet area, the potash is loosened up and sorted ("segregation") by the larger amplitude, followed by smaller oscillation amplitudes at the outlet area, which increase the screening accuracy and thus effectively separate the oversized grains. 

Precise separations in potash screening

For finer separations below 2 mm (10 Me.) (e.g. of KCL crystallisate) the screening machine with direct excitation of the screen cloth RHEWUM WAU is recommended. It is suitable for exact separations at high throughput rates.

On the outside of the static screen housing, robust vibration motors generate vibrations which are transmitted directly into the screen mesh via vibration axes. The inclination of the fabric is used for transport. A thin layer screening is performed on the screen cloth at high screenings speed. Any stuck grain is reliably freed thanks to an adjustable cleaning cycle. Due to the low moving masses (only the mesh vibrates), high accelerations are achieved at the screening surface. These help to overcome adhesive forces in moist or sticky material (e.g. rolling granules).

Screening machines for wet processing of potash salt

Short screen lengths are required for the wet classification of potash, since a rapid loss of the carrier liquid inhibits further wet screening. Therefore, the RHEWUM RIUS 1+1 relies on double feeding within just one machine and allows high screening capacities despite its compact design.

The RHEWUM ES dewatering screen, designed as linear vibrating screens, is used to dehumidify products from wet sorting processes such as flotation and to recover the process liquid. In contrast to conventional screening machines, it works with an ascending screen surface. This results in a much greater layer height and improved solid-liquid separation. Drives with high speeds are used to increase the dewatering effect

Recommended screening machines for potash salt

RHEWUM DF

RHEWUM DF

Maximum throughputs with high quality requirements in the medium and coarse grain range

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RHEWUM WAU

RHEWUM WAU

Precise separations due to direct vibration transfer to the screen mesh

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RHEWUM ES

RHEWUM ES

Robust linear vibrating screening machine for efficient dewatering of potash mash

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