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MEI Online: Comminution: Latest News: October 8th 2010


Click for more info on Flotation '19


:: Large Grinding Mill Braking System for Boliden

Twiflex Limited/Hilliard Corp. has recently supplied their largest grinding mill braking system to Metso Minerals for installation on the Boliden Mineral AB, Autogenous (AG) gearless driven mills.

Two of the largest grinding mills commercially available and supplied by Metso have replaced the existing five mills.

These 22.5 MW primary mills with wrap around motors measure 11.6m in diameter and 13.7m long, meaning the two milling lines now have a capacity of 2025 t/h.

The grinding technique used in the Boliden concentrator is two stage fully autogenous grinding where the crushed ore constitutes the only grinding media in the primary mills.

Pebbles (25-70mm) are extracted from the primary mills to make up the grinding media in the secondary ‘pebble’ mills.

By Cole Latimer




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