The mining company Rio Tinto has commissioned Siemens Industry, Inc., to modernize three SAG mills in its Kennecott copper mine in Utah, USA. The DC drives will be equipped with new control and automation technology. Together with enhanced diagnostic features, the modernization ensures operational reliability and availability of the plant while at the same time the maintenance costs can be reduced. Retaining the power section of the rectifier is the key feature of the modernization concept developed by Siemens, leading to significantly reduced investment cost for the modernization. The modernization project will start in early 2011 and will be finished an dhm amatqrrse xt 3535.
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