Lokotrack LT220D offered Kone Hyrkäs additional capacity for the maintenance of forest roads in Lapland
Machine and crushing contractor Kone Hyrkäs Oy from Kuusamo, Finland, has found an important sphere of operations, the maintenance of forest roads in Lapland. At present, most of the company’s employees are employed in the crushing and screening of road foundation materials, which occurs at a level of some 300,000 metric tons per year.
To boost the efficiency of its operations, Kone Hyrkäs purchased from Metso a Nordberg® GP220™ gyratory crusher as a secondary crusher and a Lokotrack® LT220D™ mobile crushing and screening plant which comprises a full-scale three-deck screen.
“It seems that the LT220D will pay for itself in fuel savings. Our old LT1100 consumed more than 70 liters of diesel per hour, while the new LT220D only needs 40 liters. The annual savings will be significant for us,” says Veijo Hyrkäs, the managing director of Kone Hyrkäs Oy.
Kone Hyrkäs is probably the northernmost company in the world using a Lokotrack LT220D: the company is familiar with sites located north of the Arctic Circle. The company’s goal is producing some 600,000 metric tons of crushed stone per year with the combination of an LT105 jaw crushing plant and an LT220D crushing and screen plant.
Crushed stone for forest roads
Kone Hyrkäs’ LT220D was first used at a wilderness site in Kirakkalehto, Keminmaa. Olli Arvola, a road construction supervisor of Metsähallitus (a state-owned enterprise, responsible for the management of one third of Finland’s surface area), had noticed rocks that had been piled up by the last ice age, which are excellent for crushing.
Some 10,000 metric tons of 0–32 mm road foundation material for a forest road of approximately 50 kilometers, owned by Metsähallitus, was crushed at this site.
Olli Arvola estimates that the state owns more than 14,000 kilometers of forest roads in Lapland.
More than 300 metric tons from the very beginning
Already during the first few days of using the LT220D, Veijo Hyrkäs recorded hourly capacities of more than 300 metric tons.
“We are currently crushing with the 22 mm setting, because the new mantles are somewhat tight. We plan to replace them with looser wear parts and use a setting of 32–35 mm in the gyratory crusher, at which time I believe we will reach an hourly capacity of almost 400 metric tons,” Veijo Hyrkäs explains.
“Based on our experiences, we will not miss the LT1100. In addition to using less fuel, the LT220D has wider conveyors, it is more silent, it generates less dust, and it is easier to move.”
“Once moved, it takes fifteen minutes to get it running. The IC process control works great, and when the LT105 is connected with a cable to the LT220D, the LT105 adjusts itself based on the LT220D, which makes the production process smoother. Our comprehensive 15,000-hour maintenance contract offers freedom from worries,” Veijo Hyrkäs continues.
“We will soon receive Metso ICr™remote control system for the cabin of our excavator to conveniently and safely change the crusher’s settings. In our screen, we will try out the Trellex LS screen panels, which are quick to install.”
Crushing and earth construction
Kone Hyrkäs Oy was established in Kuusamo in 1999. The company expanded its operations from excavator piecework contracting and the delivery of soil material to crushing in the 2000s.
“At present, we have more work than we have time to do. We have 27 employees in the summer and slightly fewer in the winter. At present, our crushing team consists of six people,” Veijo Hyrkäs says.