Metso says its Vertimills® are globally recognised as some of the most energy efficient grinding machines, and the company has tried to make that clear in its 2018 annual report.

Vertimills have proven to grind more efficiently than horizontal ball mills, with typical energy savings of 25-35% and, in some cases, even 50%, according to Metso.

“In addition to grinding efficiency, reduced media consumption, lower installation cost, reduced maintenance, and reduced liner wear make the Metso Vertimill the lowest total cost of ownership option in many applications,” Metso said.

Based on a review of the Vertimills currently in operation and a comparison of their efficiency and media consumption relative to a ball mill, Metso estimates that approximately 1.48 million MWh of energy was saved and 652,000 t of CO2 emissions were abated in 2018, compared with 924,000 MWh of energy and 547,000 t CO2, respectively, in 2017.

Since its introduction in 1979, over 440 Vertimills have been delivered globally.