ABB supplies five-piece stator in Chile | Automation.com

ABB supplies five-piece stator in Chile

December 8, 2010 - ABB installed and commissioned the first gearless mill drive (GMD) system for Codelco, Corporacion Nacional del Cobre de Chile, for their copper mine in Andina, Chile. Bechtel Corporation in Santiago, Chile, acted as EPCM contractor for this important project and Metso Corporation as mill supplier.

ABB's scope of supply consisted of a 13,050 kW (17,500 HP) gearless drive motor including pre-assembled containerized electrical house containing cycloconverter, exciter rectifier, low voltage MCC as well as all the auxiliary equipment to operate the gearless drive motor system and the mill auxiliary equipment.

Andina is located eighty kilometers northeast of Santiago, 3,700 to 4,200 meters above sea level. It executes ore exploitation in the Rmo Blanco underground mine and produces 248,137 tons of copper concentrates per year. The crush-, grind- and float line is located in the underground concentrator.

ABB’s main challenges were the size limitations. This 7.62m x 11.23 m (25 ft x 37ft) stator had to fit a tunnel of 6m x 6m and the bridge crane capacity was of 60 t only. ABB' solution consisted of the first stator split into five sections to master the logistic challenges of the location, while maintaining the usual stability of the system. The design typically consists of four segments, but the demands of this project challenged ABB to divide it into five parts, with successful result set.

GMDs provide maximum control over the grinding process and allow for adjustments, meeting customer requirements for process efficiency and flexibility. With an ABB GMD acting as a variable speed drive, mills start smoothly, without any mechanical stress.

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 about 117,000 people.

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