The key to a good end result
Krossekonomi has a Barmac® VSI crusher from Metso at the end of the crushing process in each line. This machine makes cubical material for asphalt and concrete ballast. The rotor is the very core of the Barmac. Krossekonomi has been using Metso’s Orange Series RC Rotor in the Barmac crusher in the top-capacity line since 2012, and the other line’s Barmac crusher still uses an older rotor model from Metso.
“There is a big difference between the rotors. The plan is to switch to the Orange Series RC Rotor in all of the Barmac crushers as the existing rotors wear out. The risk of complications is much lower with this rotor. All maintenance can be done through the service door, and I can replace almost all wear parts right through the door. I also don’t need any special or power tools, so that makes maintenance much simpler and faster. When my colleague and I each take a Barmac to do the same type of maintenance on, the one who works on the Orange Series RC Rotor is always finished twice as fast as the one who worked on the other rotor,” says Christer.
One reason is that the Orange Series RC Rotor was designed to use almost no screws. The port access has also been made more spacious, allowing more parts to be changed through the service door— aspects that both improve efficiency and simplify maintenance.
Mobile crushing sets additional demands
Since Gladökrossen is a stationary plant, there are plenty of tools and support available if problems arise. This is not always the case, however, in an industry where many operations are conducted with mobile units.
“With the old rotor, there is a risk of a part getting stuck, which means a tool needs to be used. This can be time consuming, especially if you don’t have immediate access to the right tools. The process can also get extremely complicated if the part is in an inconvenient location and is hard to reach with the tools. Time can easily slip away in a situation like this and cause a production stoppage,” explains Christer.