HMS Plants I and II
|Plant Location||Etoile Mine|
|Input capacity/day||8,000 tonnes|
HMS1 commissioned in July 2008
HMS2 commissioned in August 2010
HMS 1 plant has the capacity to treat 100 tonnes of ore per hour (tph).
In 2009 the Company commenced construction with DRA (a South African specialist manufacturer) of a second HMS plant at Etoile mine called HMS II which has been commissioned in August 2010. This is a sophisticated plant that also uses dense media. It recovers partically fine material by using banks of spirals. This plant has ore feed at the rate of 335tph and HMS feed of 200tph with additional spiral to handle 100tph feed.
Originally, the HMS plants were operated in parallel, with their concentrates being combined for leaching at Usoke and their rejects being combined for storage for future treatment.
In August 2012, the plants were reconfigured to run in series with expected improvements to both recoveries and grades. In 2014,HMS I and II running in series produced 140,554 tonnes of concentrate at grades of 5.23% Cu and 0.69% Co.With this reconfiguration, we were able to limit dolomatic feed to usoke and resulting in lower acid consumption for copper and cobalt leaching.