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FLOTATION (frothers and modifiers)

FLOTATION (frothers and modifiers). FROTHERS. They role: 1. Gas dispersion 2. Froth formation 3. Speeding up flotation. FROTHERS. FROTHERS. Frothers applied in flotation. FROTHERS. MODIFIERS. 1. Activating reagents 2. Depressants

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FLOTATION (frothers and modifiers)

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  1. FLOTATION (frothers and modifiers)

  2. FROTHERS They role: 1. Gas dispersion 2. Froth formation 3. Speeding up flotation

  3. FROTHERS

  4. FROTHERS Frothers applied in flotation

  5. FROTHERS

  6. MODIFIERS 1. Activating reagents 2. Depressants They modify: pH, coagulation, redox, rheology, etc.

  7. ACTIVATING REAGENTS Activating action of hydrolyzing cations. Flotation of quartz in the presence of 10–4 M sulfonate. (No flotation in the absence of those cations)

  8. Fluoric ions may activate and depress flotation of silicates: a – area of depressed flotation in presence of oleate b) area of activation in the presence of dodecylamine as collector (Manser, 1975)

  9. pH modifiers (acids, bases, and salts )

  10. Redox modifiers

  11. Dispersion modifiers Acids, bases, large organic ions iep

  12. Other eg. removing previous reagents from the surface 2C2H5OC(S)SK + 2K2SO3 + 2KHSO3 + 2O2  2C2H5OC(S)SOK  2C2H5OH + 4K2S2O3 + 2CO2

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