Gold: Leaching


                                TYPES OF ORE



                                LEACHING (below)

                                REFRACTORY GOLD PROCESSES

If the gold cannot be concentrated for smelting, then it is leached by an aqueous solution:

1.  The cyanide process is the industry standard.

2.  Thiosulfate leaching has been proven to be effective on ores with high soluble copper values or ores which experience pregrobbing by carbonaceous components.