ABB to supply two more drive systems to Brazilian copper mine |

ABB to supply two more drive systems to Brazilian copper mine

November 12, 2008 – ABB won a follow-up order for the Salobo copper mine project. The project is being developed by Salobo Metais S.A., a totally owned subsidiary of Vale (former CVRD).

At the end of 2007, ABB signed a contract for the delivery of two gearless mill drive (GMD) systems that will maximize productivity and energy efficiency at the new Salobo copper mine in northern Brazil. In June 2008, ABB won an additional order for the same end user. Polysius, acting as OEM, was awarded the grinding circuit package by Vale and decided to continue with ABB’s experience and expertise in regard to the High Pressure Grinding Rolls (HGPRs).

ABB’s scope of supply for the additional order comprises two medium voltage ACS1000 variable speed drive systems, including motors and transformers, for two High Pressure Grinding Rolls (HPGRs). Each drive system has a power of 2 x 1800kW.

The mining industry deploys HPGRs, often as a replacement for the conventional semiautogenous (SAG) grinding mills, primarily to reduce energy consumption and costs within crushing and grinding circuits. They consist of a pair of counter rotating rolls, one fixed and the other one floating. The feed is introduced to the gap in between the rolls and is crushed. Variable speed drives adjust the speed of the rotating rolls and the throughput of the units; this is advantageous for the grinding or crushing of inhomogeneous types of ore. This optimizes the grinding process for ores with varying grinding properties.

The Salobo project is located at the Tapirapé-Aquiri National Forest, a municipal district of Marabá, in the state of Pará, Brazil. Commissioning of the Salobo copper mine is scheduled for the beginning of 2010.

ABB is a leader in power and automation technologies that enable utility and industry customers to improve their performance while lowering environmental impact. The ABB Group of companies operates in around 100 countries and employs more than 120,000 people.
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