“As we’re always operating at the same quarry, fixed electric crushing and screening is the best solution. For us, electricity is significantly more efficient and cost-effective. Considerably less maintenance work needs to be done compared with the corresponding diesel-operated equipment,” says managing director Teijo Näppi.
“We have relied on Metso equipment since the Lokomo 50 Series jaw crusher. With a local manufacturer, spare parts and maintenance services are close. The Metso equipment has kept solid and advanced in their field,” he adds.
More than 20% more efficiency with GP330 gyratory crusher and ES402 screen
Erkko Näppi started his career as an entrepreneur as a truck driver in the 1960s. During the following decade, the business expanded into gravel hauling and later into crushing. At the turn of the millennium, the new generation took up the reins.
Over the years, the company has constantly renewed their machinery. The most recent investments have been a Metso Nordberg GP330 tertiary crusher, PREMIER ES402 double-deck screen and six new cassette trucks. Also among the new acquisitions are four Volvo wheel loaders.
“By replacing the gyratory crusher, we increased efficiency by more than 20% compared to the GP300 model. With the GP330 installed last summer we have achieved capacities of even 600 to 700 metric tons per hour. For example, we can produce the 0–16 mm grade at a regular capacity of more than 400 metric tons per hour. We use the 22-mm setting and the 36-mm stroke in the gyratory crusher.”
“An additional benefit of the new gyratory crusher is that it produces excellent aggregate in terms of shape, and extends the mantles’ service life by 20,000 metric tons,” Teijo Näppi adds.