|About this Abstract
||Part C-1: Hydrometallurgy 2018
||FLSmidth’s Hydrometallurgical Pretreatment Process for Refractory Gold Ores/Concentrates
||Gary Roy, David Chaiko, Michael Woloschuk, Carlos Eyzaguirre
|On-Site Speaker (Planned)
Today, approximately 15-20 per cent of the world’s current gold production involves refractory ores that must be pre-treated prior to downstream recovery by cyanidation. As the gold deposit head grades continue to decline, they are also becoming increasingly more complex to treat. For many undeveloped gold deposits, either the head grade is too low to be economically processed, or the reserve life is too short to deliver an adequate return on investment due to the high capital intensity and high operating costs of existing refractory pretreatment processing technologies, such as roasting and total pressure oxidation.
FLSmidth has been pioneering a mechano-chemical pre-treatment process to oxidize refractory sulfide gold ores/concentrates under atmospheric pressure and at temperatures much lower than traditional roasting or autoclave pretreatment technologies. This mechano-chemical pre-treatment approach shows great potential for processing refractory gold ores and concentrates that would otherwise not be economic to develop or process.
||Planned: At-meeting proceedings