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Frothers are widely used in flotation to help generate small bubbles, with coalescence prevention generally considered the predominant mechanism. However, recent studies have demonstrated that the presence of frothers also reduces the size of bubbles at the initial formation stage. One possible explanation is that frothers introduce a surface tension gradient-driven stress, which increases instabilities...
Small bubbles play the critical role in flotation of providing the large interfacial area for collecting and transporting selected (hydrophobic) mineral particles. The generation of these bubbles is a physical process chemically assisted by addition of surfactants (frothers). The prime action of frothers is commonly considered to be coalescence inhibition. In contrast, the possible role of frothers...
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