Regulation of coal flotation by the cations in the presence of clay

摘要: Abstract The concomitant clay minerals in coal commonly have adverse effects on the flotation. In this work, regulation of flotation by cations (Na+ and K+) presence was investigated to abate deterioration. It observed SEM-EDS that particles coating surface low pH condition, which significantly reduced hydrophobicity coal. However, after introducing K+), originally adhering fall off form large aggregates. addition Na+ K+ affected DLVO interaction energy between clay, making attracting tendency clays stronger than attraction Moreover, cation species different behaviors. improves combustible recovery inhibiting coating. While, mainly promotes aggregation inhibits clay. Thermodynamic simulating calculation shows combination will release more heat is also conducive hinder obtained behavior rules mechanisms using regulating can help decouple effect clean production coal, especially water-deficient coastal areas.