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By K.A. Matis

"Discusses the beginning of flotation in mineral processing, describes the applying of recent flotation theories, and considers quite a few substitute suggestions, together with flocculation and solvent sublation. includes authoritative contributions from greater than forty five overseas experts."

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Extra resources for Flotation Science and Engineering

Example text

Page 16 Figure 6 Comparison of electryolytic flotation with dispersed-air flotation: (a) dolomite fines and (b) magnesite fines (20 mg L-1 commercial fatty acid collector). ) Page 17 For the flotation of ores of the finest particle ranges (having 100% lower than 10 µm diameter), a free jet flotation cell has been developed, which uses a combination of the conventional dispersed-air with an induced-air (dissolved) device. This device causes air to be sucked in the cell due to the under pressure caused by the slurry jet movement (33).

Selected results are presented in Figure 13. The transfer of mineral-processing know-how to environmental technology may be a further advantage for both parts. Another incentive for this work came from the so-called carrier flotation (ultraflotation or "piggy-back" flotation), which generally uses an auxiliary mineral (for instance, calcite) for the separation with flotation of useful fine particles from the rest solids, as for example in the case of anatase fines, which were separated from kaolin.

Aggregating effectiveness increased with the number of carbon atoms in xanthate molecules. Flotation rate, recovery, and selectivity were improved by using octyl-or decyl-xanthate (37). In other related laboratory experiments for systems of well-defined binary mixtures, the most important examined parameters were the ionic radii, the ionic strength, the Hamaker constant, and the surface potential of the particles. Several examples occurring in clays, mineral slimes, and natural water systems were also summarized (38).

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