RI 3469 Progress Reports -Metallurgical Division - 32. Ore-Dressing Studies - Properties Of Suspension Mediums For Float-And-Sink Concentration ? Introduction (cc6d15d8-53dc-4d41-9a6a-3ddc1db53433)

Metallurgists and coal-washing engineers have used heavy liquids for years in studying the characteristics of ores and coal. By such means true separations can be made between the various specific-gravity increments in the materials examined. To use of heavy liquids has permitted determination of the possible grades of tailings and concentrates by specific-gravity methods on any particular size, and therefore the size to which the ore must be crushed to free the valuable material. The simplicity of float-and-sink separation and the high degree of efficiency attained in the laboratory are factors that commend the method for commercial concentrations.