Abstract
The article presents the results of the VNII Galurgii’s studies into development of reagent regimes for flotation of potash ores of the Upper Kama deposit in fat solutions of potassium and sodium chlorides. The influence of the temperature of the saline solution and the content of magnesium chloride in it on the efficiency of aliphatic amines—collector of sylvin—was investigated. An alternative ethoxylated sludge collector for flotation de-sludging of potash ores is tested. The effect of a modified sludge depressant obtained by the synthesis of urea and formaldehyde is studied. The developed reagents are tested in full-scale processing of potash ore with variable composition and an increased content of sludge-forming silicate-carbonate and anhydrite water-insoluble impurities have been carried out. It is shown that the process stability and the production performance improve. Application of the sludge depressant in flotation of potash ore of variable composition allows stabilization of sylvin flotation and reduction in potassium chloride loss owing to stimulation of potassium chloride flotation from coarse tailings, which enables the decrease in the sylvin collector consumption and favors improvement of the process performance.
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