How is Potash Processed? Canpotex
2020-6-18 · The majority of fertilizer grade potash is processed using flotation processing. A second method, crystallization, is used mainly to produce Industrial and specialty-grade (white) potash. In both methods, impurities are removed from the potash ore, and the size of granules can be changed, but the final product is the same naturally-occurring mineral as was originally mined.