When I search for “refractory gold P80 75 µm Eh 500 mV,” I get a grab bag of loosely related posts instead of process-focused threads; could we improve tagging (comminution, flotation, leaching) and teach search to respect units/symbols so flowsheet and kinetics questions surface properly? Quoting exact phrases like “heap leach” helped a bit, but PSDs and redox terms still throw it off.