The new concept adopted in the Hydrojet flotation cell is based on the use of high velocity water jets, in place of the conventional impeller in order to produce more favourable conditions for the development of the flotation mechanism, such as smaller bubble size, better agitation, faster flotation time, less energy consumption and thence higher recovery and better product quality, with particular focus on fine particles. The paper highlights the approach followed, illustrates the experimental apparatus and discusses the results obtained, outlining the possibility of commercial application. In particular, the influence of experimental variables like pressure and flowrate of water at the nozzles, air addition, collector injection, feed rate of solids, is shown in the case of a barite ore, in comparison with a conventional cell.
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