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MEI Online: Comminution: Latest News: May 5th 2011


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:: IsaMillsTM Southern Comfort

The years of work undertaken by XT’s Chilean and Canadian offices has eventually been rewarded, with a number of IsaMillsTM recently being selected for projects in South America.

The first order, was for Xstrata Copper’s Antapaccay project, situated in Southern Peru, which has selected two M3000 IsaMillTM for copper regrinding. The target grind is finer than 40 microns to achieve concentrate quality and recovery. This will be assisted by the flotation benefits from the inert ceramic media. The mills will come complete with the entire regrind plant design and supply, including feed and discharge hoppers, surrounding steel work, and the proprietary IsaChargerTM media addition system.

Steve Schmidt ­ Operations Manager ­ Mineral Processing at XT, said this project is part of Xstrata Copper’s innovative standard concentrator design concept, where equipment and engineering standardisation has resulted in reduced capital costs and delivery timelines, and spare parts, training, operating and maintenance savings. Xstrata Copper undertook rigorous comparisons of a variety of regrind equipment, and selected IsaMillTM technology based on its superior energy efficiency. This is important, particularly in regions of South America, where power costs are high.

The other major order recently announced for the region was for 3 X M3000 IsaMillsTM for Xstrata Copper’s Las Bambas copper project in the Apurímac Region of Peru. The concentrator will treat 140,000 tpd to produce 400,000 tpy copper in concentrates. High Flow IsaMillsTM were chosen for concentrate regrinding to achieve high grades and recoveries.

Karina Arburo, South American IsaMillTM Manager at XT’s Santiago Office said that as well as the Antapaccay and Las Bambas IsaMillsTM, design work is also underway for the IsaMillTM selected for Exportadora Aurifera gold mine in Ecuador. The gold project will be using the 75 kw M100 IsaMillTM. This is the smallest in the IsaMillTM range and well suited to small tonnage operations that need high energy efficiency.

Karina said "South America will have significant new copper mines and expansions in the future, and the energy efficiency and inert chemistry of the IsaMillsTM offers a much better solution to produce high quality concentrate at high recoveries."

Commissioning of the Antapaccay IsaMillsTM is planned for the second half of 2012, while production of the Las Bambas project is scheduled for startup in 2014.




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