Abstract
Flotation data on copper-bearing shale in aqueous solutions of inorganic electrolytes (NaCl, Na2SO4, KPF6, NH4Cl) and organic reagents (ethylamine, propylamine) as frothers were presented and discussed. The relationships between shale flotation, surface tension of aqueous solution and foam height during bubbling with air in the flotation system were presented. It has been found that flotation of shale in the presence of inorganic salts the yield was directly proportional to the surface tension of the aqueous solution of salt and inversely proportional to the height of the foam. On the other hand, for organic reagents solutions (short chain amines), a reverse effect has been observed in relation to the inorganic compounds studied, that is the yield of copper-bearing shale flotation and the foam height were inversely proportional to the surface tension of the amine solution.
Highlights
Salt flotation relies on flotation in saline solutions [1, 2] without the presence of additional reagents
For ethylamine and propylamine, for which the surface tension decreases with increasing concentration of frother (Figure 2b), a slight increase in yield is observed with increasing height of flotation froth (Figure 2c)
It is shown that the yield of salt flotation of shale depends on the concentration and type of salt
Summary
Salt flotation relies on flotation in saline solutions [1, 2] without the presence of additional reagents. The aim of this works, which is based on flotation results of Smolska and Ratajczak [6] and Witan and Ratajczak [7], was to compare the influence of inorganic and organic regents on flotation of naturally hydrophobic copperbearing shale and to determine how the flotation results depend on foaming and surface tension of these regents in aqueous solutions.
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