Expansion in the works
The mine is in the process of an SEK800 million ($82 million) expansion that will see plant throughput go from 7.8 Mt/y to 9.5 Mt/y. The addition of a new autogenous mill and peripheral equipment (including a new Metso MF series screen) as well as a new mill building are all part of the planned project. Commissioning of the new equipment is expected in 2020, with the mine reaching full 9.5 Mt/y capacity in 2021.
With this expansion going on, plant maintenance has become even more of a focus.
Some 80% of process plant maintenance is currently pre-scheduled, with the Kevitsa mine achieving, on average, 93% availability from its equipment, according to Sami Pelkonen, Maintenance and Engineering Manager at Boliden Kevitsa., but the mine is looking to increase these numbers.
“Kevitsa mine has been looking to acquire good quality and useful data to support the daily maintenance operations and procedures at the plant” stated Pelkonen. “This is all part of the company’s plan to increase uptime and cut costs at the operation.”
As part of this initiative, it installed the IBM Maximo asset management system in May 2019. At the same time, the operation has been working with the Boliden Mines Technology Department on a wider asset management program.
When it comes to plant reliability, Boliden Kevitsa has enlisted the help of SKF (for condition monitoring of bearings throughout the plant), OSISoft for process data acquisition, and Metso to ensure uptime of mineral processing equipment is maximized and unplanned downtime is reduced.
Quick results after installing Metso Metrics
When the mine acquired a new MF screen from Metso in 2019, it decided now was the time to trial the new Metso Metrics predictive maintenance platform in this part of the flowsheet.
Installing Metso Metrics as a test paid off almost instantly, when, soon after installation, the company noticed there was something wrong with the running speed of the screen.