The company’s crushing team has been hard at work with the unit for some nine months and almost 3,000 hours.
“The LT220D consumes 20–25% less fuel than our older LT1100 cone crusher (full name but no linking – an old product) and screen plant, even though it generates more than 50 metric tons more of crushed stone in the same amount of time. There seems to be more crushing stone against stone in the GP220 crusher, which means that the wear parts will last for some 20,000 metric tons more,” Lauri Lintunen adds.
More than 3,000 metric tons of stone crushed per day
The temperature of -20°C and the icy wind in the morning did not deter the morning shift of LL Company when they started the double-stage plant consisting of the Lokotrack LT110 and Lokotrack LT220D in March at Suovanlahti in Viitasaari.
Material is fed from the gravel pit bench to the jaw of the LT110 jaw crusher, where it is crushed with the 70 mm setting to be further processed by the LT220D. The crushing and screen plant first separates fines from the crushed stone and then the GP220 makes the boulders smaller with a setting of 19 mm and stroke of 36 mm.
“The average capacity when making the 0–16 mm grade is some 200 metric tons per hour, which means that two shifts will create some 3,000 metric tons of crushed stone. The screen of the LT220D seems very efficient, which means that unnecessary fines do not enter the crusher.”
The new LT220D consumes some 35 liters of fuel per hour.