Saleable potash is produced by first removing the clay and salt in the Milling process.
The ore is crushed and screened to a 3.3 mm particle size. It is then mixed with saturate brine in a scrubber to loosen the clay. The resulting slurry is treated in flotation machines to remove the clay. The concentrated potassium chloride slurry is sent to a centrifuge to remove the brine, then put through gas-fired dryers. After drying the product passes through a series of screens which separate it on the basis of size into coarse, standard and special standard.