Day: February 3, 2010

A Review of Gold Metallurgy

Wednesday February 3
Chem. Sci. & Engineering Room 211
8:00 a.m.

Presenter: Dr. Sevket Acar, Director, R&D, Newmont Metallurgical Services

Abstract: The occurrence of gold defines how it is going to be processed.  Free native gold particles may be concentrated via gravity and/or flotation methods and sold.  Some concentrates may require to be further treated by smelting or leaching to recover gold.  Gold may be associated with oxide ores which may require dump (or heap) leaching or milling.  On the other hand, refractory gold ores may require pretreatment, to render gold leachable, followed by leaching with cyanide.  Pretreatment options may include roasting, pressure oxidation and bio oxidation.  Once the leaching with cyanide is completed then the gold needs to be recovered from pregnant solution via Merrill Crowe or activated carbon.  In this presentation, importance of gold occurrence, mineralogy, oxide and refractory gold ore treatment technologies and recovery of gold from solution will be reviewed