is currently developing its InLine Leach Reactor, the ILR45000 to treat silver flotation concentrates and recover silver metal on site.
A large proportion of the world’s silver is produced as silver flotation concentrate, and sold to smelters for treatment, a process that incurs costs in smelter charges, transport and often extra taxes.
However, Gekko’s ILR has the ability to add value by treating silver flotation concentrates and recover silver metal on site. The intensive leaching conditions of high NaCN in solution and high dissolved oxygen levels overcome the issue with silver’s slow dissolution rate in traditional CIL-CIP circuits while the scrubbing action of the rolling drum reduces the formation and impact of insoluble silver sulphide minerals on the surface of the silver.
Silver leaching chemistry is complex due to the many silver minerals involved, and often requires a finer grind, higher cyanide conditions and longer residence times than what is required for gold, making test work essential. Gekko has experience in optimising the leaching of silver concentrates through the implementation of successful projects such as Hochschilds Ares and San Jose concentrate treatment plants.
Due to the increasing demand for the treatment of higher masses of silver flotation concentrates, Gekko is currently developing the ILR45000, which will increase treatment rates by a minimum of half a tonne an hour up to a nominal ten tonnes per hour depending on leach residence.