Abstract

LOPEZ-SAUCEDO, F. et al. Effect of KI, NaCl, MgCl₂ and Na₂SO₄ solutions in bubble size distribution and its relationship with flotation of coal particles and mineral matter. Rev. Mex. Ing. Quím [online]. 2016, vol.15, n.1, pp.221-229. ISSN 1665-2738.

In this study we assessed the coal flotation in KI, Na2SO4, MgCl2 and NaCl solutions in the absence of frother. When the concentration of Na+, ${\mathrm{S}\mathrm{O}}_4^{2-}$-, Mg2+ and Cl- is relatively high, between 29,221 and 71,022 ppm intensifies the presence of fine bubbles, between 0.50 and 1.67 mm (diameter) and thus the favorable conditions of flotation. It was observed that the concentration of Na+ and Mg2+ increased combustible recovery to 85%. Solutions with high K+ and I− are associated with modest recoveries between 44 and 70%, while the combination of ions Na+ and ${\mathrm{S}\mathrm{O}}_4^{2-}$ enhances recovery of mineral matter in the concentrate, to 60%.

Keywords : flotation; coal; salt; bubble size.

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