VERFAHREN ZUR MINERALGEWINNUNG

摘要

Mineral values are recovered from ground ore (or concentrate thereof) in a plurality of froth flotation steps in a commercial-scale vessel, the improvement being that agitation is effected by an impeller at a high rate, such that the Froude number is at least 2.0 (Froude number is DN<2>/g, where D is the diameter of the impeller in feet, N is the number of revolutions of the impeller per second and g is the gravitational constant in feed per square second). The method involves using, on a commercial scale, a Froude number at least as high as the Froude number used in optimum conditions on a laboratory scale.