The froth flotation process is commonly employed for the selective separation of a mineral species from a liquid-solid suspension of both valuable and unwanted gangue mineral particles. The valuable mineral species (which needs to be separated) is rendered hydrophobic by controlling its surface chemistry to provide the potential conditions for the attachment of the particles to air bubbles. The bubbles and particles are made to interact with each other inside a flotation machine. The flotation machine, depending on its operating conditions, provides an environment for the bubble-particle attachment and permits levitation of bubble-particle aggregates to the froth. The manner in which bubbles and particles interact with each other depends on the cell operating conditions and the type of flotation machine used.

Flotation machines, in general, may be categorized into four different classes: (i) mechanical or conventional cells; (ii) energy-intensive pneumatic cells; (iii) column cells; and (iv) froth separators. Of these, mechanical flotation cells have dominated the mineral industry since the early days of flotation and account for a significant amount of minerals processed. The aim of this article is to describe the operation and design of mechanical flotation cells.

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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