Froth Characteristics Affecting Species

The effect of froth structure on flotation is usually related to its stability. Stable froths have small bubbles and a high entrained water content. The solids in the entrained water are approximately at their concentrations in the pulp; consequently their overflowing concentrates will be of low grade. The presence or absence of fine, colloidal particles has a profound effect on flotation froth structure and drainage, and thus overall flotation performance. The most notable example of this is the deleterious effect that copious quantities of (naturally floatable) talc particles have on sulfide flotation, with adverse results in grade, recovery, and rates of recovery. The same froth modifying effects can be noticed when dealing with colloidal precipitates. In practice, the noticeable effects are largely limited to iron hydroxides, due to their abundance in natural systems. Thus, a change in froth structure may be noted when hydrated ferrous hydroxide particles are oxidized to (less hydrated) ferric oxide. The latter species allows a more desirable, less slimy, froth structure. As another example, it has been strongly suggested that the common practice of copper sulfate addition in flotation plants, apart from activating effects, also has strong froth structure modifying effects.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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