Homestake Gold Mine, Ruby Hill, Nevada - Mining Technology ...
Crushed fine ore is ground in a ball mill in closed circuit with a hydrocyclone. Cyclone overflow is thickened to 55% solids and leached in a single, air sparged, mechanically agitated leach tank. Leached slurry is filtered to produce filter cake of less than 25% moisture and a high-grade gold solution for carbon adsorption.