The Barrick Roaster Facility is a greenfield, 12,000 tpd carbonaceous ore gold processing plant, producing 1,800 troy ounces of gold per day. The new facility consisted of primary and secondary crushing, ore storage, reclaim to dry grinding, whole ore roasting, gas cleaning, carbon-in-leach with carbon stripping and gold refining, also included are tailings treatment and disposal.

Scope of Services
Hatch was retained to provide full engineering, procurement (including specifying all equipment) and construction management services. Engineering was split into basic engineering, including vendor and detailed engineering. Process design included process definition development and construction of a METSIM process simulation. The process control discipline was responsible for the software development and testing of the DCS system and for the system integration of vendor supplied PLC’s.

Project Highlights
Grinding of the ore was by two dry grind double rotators, followed by whole ore roasting using two, two-stage oxygen roasters. Gas cleaning was by gas quenching, dust scrubbing using soda ash, mercury scrubbing, CO incineration and NOX removal. A new carbon handling facility was provided and integrated into the existing carbon stripping and gold refining plant.