Flotation Frothers

Flotation frothers are surfactants that control bubble size and frothnstability in a flotation cell, so mineral-laden bubbles form, rise, and carry concentrateninto the launder without collapsing or over-stabilizing. Unlike collectors,nfrothers do not make minerals hydrophobic; they manage the air/water interface. Choosenthe frother by the froth behavior you need, then set dose by froth depth and texturenrather than a fixed concentration.

Methyl isobutyl carbinol (MIBC) is the most widely used alcohol frother. It produces anrelatively brittle, fast-breaking froth that drains gangue well and is easy to control,nwhich is why it is the default for many sulfide circuits. The trade-off: that brittlenfroth has less carrying capacity than a stronger frother, so coarse or high-mass loadsncan drop back. Dose MIBC to the froth, not to a fixed ppm.

Polypropylene glycol (PPG) and other polyglycol frothers give a more stable,nhigher-carrying froth that holds coarse particles and tolerates variable feed. The costnis selectivity: a persistent froth can pull more gangue and is harder to break inndownstream cleaning. Many plants blend an alcohol frother with a polyglycol to tune frothnstrength to the ore. Start from a single frother and add the second only when the frothnneeds more stability.

• Sulfide mineral flotation requiring controllable, fast-draining froth (MIBC)
• Coarse-particle and high-mass flotation needing higher froth carrying capacity (polyglycol frothers)
• Frother blending to tune froth stability to variable or changing ore feed
• Rougher, scavenger, and cleaner stages with stage-specific froth requirements
• Circuits where selective gangue rejection depends on a brittle, well-draining froth

• MIBC (4-methyl-2-pentanol) u2014 PubChem
• Polypropylene glycol u2014 PubChem