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The studies on the development of flotation enrichment technology for potash ores (sylvinite, kainit-halite, carnallite-kainit-halite) were conducted. Optimal flotation conditions: salt composition, density and pH of the dispersion medium, collector of the useful component, auxiliary reagents-frothers, hydrophobisators, depressors for obtaining highly enriched potassium-containing concentrate have been developed for each ore. On the example of sylvinite ore enriched by direct flotation in ore-saturated solutions with a density of 1235 kg/m3, it was shown that the use of a combination of frothers (pine oil, polyethylene glycol) and apolar reagents (liquid paraffins, industrial oil) as part of a complex collector based on higher aliphatic amines (C16 –C18) provides an increase in the extraction of potassium chloride to the concentrate with high quality of the latter. For kainite-halite ore enriched by direct flotation in the saturated aqueous solution of magnesium chloride with a density of 1284 kg/m3 and pH 6–7, lower aliphatic amines (C10 –C12) in combination with amyl alcohol or caprylic acid are effective as a collector of kainite. Carnallite-kainite-halite ore is enriched by reverse flotation in aqueous solutions of magnesium chloride with a density of 1285–1295 kg/m 3 and pH 3–4 using the halite collector of the hydrochloric acid salt of alkylmorpholine.

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