Timed Flotation Test & Cumulative Grade Recovery Curve

Apart from conducting a rate test in the correct manner, it’s important to collect the right number of concentrates and at the right times; doing this will ensure that the data you generate maximizes your analysis of flotation response. To properly define the relationship between recovery and time, you need a minimum of four concentrates and four data points on the graph. The timing of these concentrates is critical to ensure that the three major characterizing aspects of the recovery time curve are defined accurately. These aspects are the initial slope of the curve; the determination of fast floating rate is dependent on the accuracy of the slope. For this reason the first concentrate must be collected within two minutes; two minutes is the maximum time allowed. If concentrate is collected after this, calculated fast floating rate is less than its true value. The second aspect is the slope of the curve at the end of the test; this determines the slow floating rate. The third aspect is the location and general shape of the point of inflexion of the curve. This illustration of a rougher feed flotation rate test for a slow floating nickel ore- shows why a minimum … Continue reading Timed Flotation Test & Cumulative Grade Recovery Curve