Metso Outotec has signed an agreement with a copper and gold mine in the Asia Pacific to deliver four ball mill upgrade packages to improve efficiency in grinding mill processes.

The company said the technology would increase energy efficiency while minimising waste and plant downtime. The value of the technology is USD$21.42 million (€19 million); the details of the mine have not been disclosed.

Jonathan Allen, senior vice president, grinding, bulk and pyro business line of Metso Outotec, said the technology builds on sustainability offerings and its strategy to provide circular services.

"We are pleased to have been chosen as the supplier for the grinding mill refurbishment project," Allen said.

"The customer's performance objectives were achieved by offering a technical solution which increased the operating volume of the mill and allows for future process optimization.

"Providing these thirty+-year-old mills a new lease of life is exciting for Metso Outotec and builds on our sustainability promise of delivering circular offerings."