Gold: Leaching


                                INTRODUCTION

                                TYPES OF ORE

                                MINING

                                CONCENTRATION

                                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.