Veljekset Paupek Oy, based in Tornio, Finland, leased an LT200HP cone crusher from Rotarent to accompany their own Lokotrack LT106 jaw crushing plant to create a two-stage crushing process.
“We were able to crush the entire batch of 10,000 metric tons in just over two weeks. We were positively surprised both by the operating speed and the impressive performance in crushing asphalt of the combination of cone crusher and jaw crushing plant,” says Ville Takalo, Paupek’s Technical Manager, when assessing the job.
The asphalt was collected from a 600-hectare site at the Outokumpu steel plant in Tornio. With grain sizes of 0–32 mm, the final crushed product will be compressed and reused in maintaining the roads at the plant site.
An effective crushing combination
Brothers Petri and Tero Karjalainen from Paupek’s subcontractor P&T Karjalainen Oy operated the Metso Lokotracks at the Tornio steel plant. The work was done under variable winter weather conditions, with the temperature ranging from 5 °C to -10 °C.
The lowest part of the asphalt pile had to be loosened with a frost spike before the asphalt could be fed into the jaw crusher. The jaw crusher was set for a grain size range of 38–50 mm, with the LT200HP set at 25 mm.
“We hadn’t used this kind of cone crusher before, but we were able to learn the operation well. Having instructions in Finnish for the machine’s Metso IC™ process control helped a lot,” says Petri.
The crushing mainly took place during daylight hours in the short winter days, and the brothers were able to crush over a thousand tons every day.