In gold mining, cyclones are equipment used in the ore processing stage to separate particles in a slurry (crushed ore mixed with water) based on size and density through centrifugal force. The process involves feeding the slurry into the cyclone, where heavier, coarser particles exit through the bottom (underflow) for further grinding, while lighter, finer particles exit through the top (overflow) for downstream recovery. Cyclones improve grinding efficiency, enhance gold recovery rates, and prepare material for chemical processes like flotation or leaching, making them essential for efficient and cost-effective gold extraction.