Future Developments

Further intensification of the flotation process is likely to come about in two directions. The processes of bubble contacting, bubble transfer to the pulp-liquid interface and froth drainage, are all responsive to a force field which can induce body forces on the liquid. In normal circumstances, the main body force is that of gravity. Accordingly, if the effective flotation rate per unit volume is to be increased, the logical step is to subject both the liquid and the froth to a centrifugal field. This will undoubtedly increase the mechanical complexity of the apparatus, and the saving in flotation cell volume may not warrant the extra cost of building, running and maintaining the equipment. Another possible direction for increased intensification is in the design of the initial gas-liquid contacting device. We have seen that, in both the Jameson cell and the Ekof cell, contacting takes place in a pipe or downcomer which must be of sufficient length to ensure efficient contact between bubbles and particles. It is likely that other contactors could be devised which could bring about essentially instantaneous contact between particles and bubbles, effectively eliminating the downcomer. However, the over-riding objectives mentioned earlier - achieving high grades and recoveries, with small size, minimum capital and operating costs, in equipment which is easy to operate and maintain - will always remain the prime concerns of industrial users. In any new approaches, these objectives must be kept in view.

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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