In the 1950s, the opinion was often expressed that the mechanically-agitated machine forms the best rougher and a pneumatic machine the best cleaner, the reason being that the former type has come to be regarded as one that yields a heavily-mineralized froth, which, though giving a good recovery of the minerals, is likely to be … Read more
Flotation Conditioning is often necessary as it is not sufficient merely to make the addition of the various reagents to the pulp and then to proceed with flotation. Intimate admixture is essential in order not only to bring about their even dissemination throughout the pulp but also to ensure that the millions of particles of … Read more
Surface-Energy of Liquids and Surface-Tension The attractive forces mutually exerted between the interior molecules of a liquid produce at its surface the energy effects known as its “ surface-tension Within the mass of the liquid, each molecule attracts and is attracted by its neighbours with a force as intense as it is limited in range … Read more
Mineralogy & Flotation: Floatability VS Selectivity Test Assessment Flotation Kinetics: Mass & Water Recovery VS Entrainment & Mineralogy Timed Flotation Test: Concentrate Collection & Cumulative Grade Recovery Curve
As an example of the beneficial effect of copper sulfate in the activation of zinc sphalerite toward flotation, the series of results shown in Fig. 1 is of interest. These represent rougher tests on a sample of heavy pyritic ore. The particular sample in question contained about 5.6% zinc as marmatite; and was treated in a circuit … Read more
Uraninite and masuyite are the major uranium minerals, essentially fine grained, in the ores studied. Over 40% of the uranium is distributed in the -8µm fractions compared with copper, which is concentrated mainly in the +8-20µm range. Uranium is concentrated mainly in the copper ore zones, with only marginal levels in the gold-only ores. Poor liberation … Read more
