Gold Ore Processing | ScienceDirect- gold ore process flow diagram primary crushing ,This chapter considers comminution for gold ores, starting with breakage induced in the blasting process, continuing through primary crushing, primary milling, and secondary milling.Gold Processing Methods & Gold Ore ExtractionThe primary grind sizing, for Flowsheet 2, was a nominal 50um P80, two tests were conducted at a coarse crush size of 3.350mm P80 to assess heap leach amenability of the selected composites.