Effect of salt environment on the colloid chemical properties of alkil-morfoline in flotation enrichment of polimineral ores

Studies of the surface tension at the interface between aqueous and saline solution of hydrochloric acid Armoflote 619–air have shown that the salt of alkylmorpholine is not prone to precipitation even in saturated solutions. The study of the foaming ability of the hydrochloric acid salt of Armoflote 619 in both aqueous and saline solutions, up to saturated ones, showed the high resistance of the salt of Armoflote 619 to the precipitating effect of inorganic electrolytes. For the enrichment of polymineral ore the optimal composition and density of the flotation solution were selected. It is a water magnesium chloride solution with a density of 1 295 kg/m³, presaturated with ore to a density of 1 305 kg/m³. It has been established that the use of acidified flotation solution with pH 3–4 leads to an increase in the extraction of halite into the foam product. The recovery of NaCl is 95–96 %. The acidic environment of the flotation solution leads to a decrease in KCl losses by 1.3 times and MgSO₄ by 2.8 times. The accumulation of alkylmorpholine in flotation solution helps to reduce the collector consumption during flotation in circulating brines: if in the primary brine 89,55 % of sodium chloride can be extracted from the ore at the consumption of alkylmorpholine of 460 g/t, then during flotation in the brine of the 8th recirculating cycle at the consumption of 160 g/t of ore, 94,57 % of it is extracted.

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