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Flotation tests using different size fractions of molybdenite with 50 ppm of Diesel oil and 25 ppm of MIBC, carried out in 0.01 M NaCl solutions and seawater, showed much lower floatability of the −10 μm size fraction. The flotation of this finest size fraction was very much improved with the use of polyethylene oxide (PEO). The tests revealed that the improvement resulted from aggregation of fine...
Coating of valuable mineral particles by hydrophilic slimes is known to depress flotation of such particles. This is referred to as a slime-coating. Such a slime coating takes place in the flotation of molybdenite in seawater when pH of the pulp is raised to depress pyrite and Mg(OH)+ hydroxy-complexes and precipitating magnesium hydroxide accumulate on the molybdenite surface. The dispersant tested...
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