Between 2,000 and 2,500 metric tons of screening per day
Bornholm is the only area in Denmark with a supply of hard and durable rock materials. The soil of the country’s other parts is primarily gravel, sand and sandstone. Thanks to this, the quarry next to the town of Rønne has been used since 1948.
The more than 120-meter-deep old quarry has now been closed, and rock material is being removed from the new 70–90 meter section. The production runs four days a week, from six in the morning to five in the afternoon, and during this period, 2,000–2,500 metric tons of crushed stone passes through the ST2.8 screen.
NCC Roads A/S’s quarry offers all the required product sizes for its customers, from boulders between 400 and 4,000 kilos for harbor breakwaters to crushed stone between 0 and 200 mm to be used as filler, and asphalt and concrete varieties of 11–16 mm and 2–8 mm.
Current annual production is approximately 300,000 metric tons, which doubled two years ago when the company produced crushed stone for the new 16-hectare harbor area. The end products are sometimes shipped to other parts of Denmark, as well as to Germany and Russia.
“ST2.8 is made for rock”
The new mobile scalping screen was supplied to NCC by Metso’s Danish dealer, Dansk Grusgrav Materiel ApS. The company’s Project Manager, Jørgen V. Nielsen, analyzes the suitability of the ST2.8 model for worksites like NCC as follows:
“ST2.8 has been designed to meet the requirements of demanding primary crushing, and it’s ideal for processing crushed rock material. It’s robust, and its steel-framed apron feeder is extremely resistant to hard impacts by the feed material,” Nielsen says.
“The screen effectively separates fines from the process before secondary and fine crushing and ensures steady and continuous production without unexpected downtime in facilities like the one in Bornholm.”