Despite its simple design, the scale-up and modelling of column flotation is a complex problem. It includes analysis of three-phase three-dimensional flow in collection and cleaning zones and in the washed thick froth layer. In the last few years, a technique for column design has been developed. Its adequacy has been confirmed by many columns installed worldwide for a wide range of mineral and other applications.

Z. Xu, University of Alberta, Edmonton, Alberta, Canada

Copyright © 2000 Academic Press

Flotation is a versatile, surface wettability-based separation process, usually taking place in an aqueous medium. In flotation, a water-repellent (hydropho-bic) target to be separated is attached to a carrier lighter than the medium in which separation occurs. The target varies from fine particulates (solid or

Special attention should be paid to the carrying capacity of air bubbles and to secondary upgrading in the froth.

Design of air-sparging systems, feed distributors and also froth discharge systems is critically important for successful column operation.

Unconventional design and use of pre-aeration systems are the main trends in flotation column development at present.

See also: II/Flotation: Column 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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