Download MIBC Frother Comparison Chart - Methyl Isobutyl Carbinol

The decision to use a froth flotation process creates a range of options for a mine across collectors, modifier, and frothers. One significant choice for a mine using the froth flotation process is the selection of an optimal frother to generate quality froth and to maximize the recovery of minerals and metals from ore.

Some examples of criteria that are used in the evaluation of frothers include –

• Molecular Weight – A lower molecular weight frother (e.g., MIBC) has high diffusion coefficients and thus fast flotation kinetics; a higher molecular weight frother (e.g., PPG) offers good selectivity and well-defined chemical structures and composition.
• Maximum Foam Volume – A higher value indicates a stronger foaming ability of the frother.
• Foam Half-life – A longer half-life indicates greater foam stability.
• Foam Comprehensive Index (FCI) – A calculation based on both the foam volume and the foam half-life measurements; the FCI attempts to create an objective measure across frothers.
• Foam Rise Velocity – A ratio of foam height to aeration time; a larger velocity means a lower foam viscosity.
• Foam Duration – The length of time that foam persists given a specific concentration level; the duration of a frother influences both recovery and the operation of the flotation cell.
• Froth Surface Tension – The ability of a frother to break the surface tension of water.