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Gangue rejection responses for a variety of gold ores
Published in Mineral Processing and Extractive Metallurgy, 2020
T.D.H. McGrath, A. R. Bax, J. J. Eksteen, J. L. McGrath
The standard GRAT v2 (referred to as GRAT for the remainder of the paper) is a sequential sink-float procedure, again using HLS as a proxy for liberation of gold from the gangue. This ideal separation describes an intrinsic characteristic of the ore and not the ability of a separation device to recover that material. The method uses a propriety blend of lithium tungstate salts (known as LST) to separate from 2.95 to 2.55 in increments of 0.1 units of SG. The method, shown in Figure 2, has now been applied to 10 gold ore samples in 16 different tests.