Boosting quarry efficiency by cutting fines

The Norwegian quarry firm Feiring Bruk reports an 88% reduction in fines following the commissioning of its new wet processing plant. The firm operates primarily in eastern Norway and has 10 sites extracting and producing crushed stone, gravel and asphalt.
June 4, 2020 Read time: 2 mins
Using a new wash plant is helping boost efficiency for a Norwegian quarry firm

As well as its multiple sites in the east of the country, Feiring Bruk works across Norway for key clients, using mobile crushing and screening plants. Having amassed fines stockpiles at Lørenskog quarry alone, Feiring Bruk was keen to identify a solution that would allow the material to be processed and valuable product recovered.

Modularity and mobility are at the core of equipment designed by CDE and this was an important factor for Feiring Bruk as its operations rely on portability. The firm said that it had a massive amount of material it had been unable to exploit, and which previously would have been deposited. But with the new facility it can now extract washed out particles of zero size and can recover a range of new products the previous system was unable to process.

The washing plant at Feiring Bruk’s Lørenskog quarry comprises an M2500 E5X mobile washing plant with integrated hopper, feed conveyor and P3-75 Infinity Screen and EvoWash sand washing plant. For water processing there is an AquaCycle thickener with automatic dosing station, AquaStore water storage tank and a secure control station. Laboratory tests by Feiring Bruk show that the system washes out 88% of the fines. Before washing, the material contains 65kg of fines per tonne, whereas the washed product has just 8kg of fines/tonne. In fraction 0–20, they have measured 6.5% fines before washing. After washing, the fines content is reduced to 0.75%.

Using its new washing plant, Feiring Bruk is able to make use of a large proportion of the excess product. The wash plant systems are designed to recirculate up to 90% of water, helping to reduce the volume of fresh top-up water required. In addition, the Feiring Bruk plant has been placed on a sloped asphalt surface which allows water to flow into the water basin used as a reservoir.

Products extracted using the new washing plant are attracting the attention of new customers in Norway for their improved grading accuracy. The firm says that its customers want drainage gravel in fraction 8–16 to avoid fines. Now the company can supply drainage gravel in fraction 4–16 that has been washed and is free of fines. The uses for the washed material include asphalt and concrete production and paving stones.

Materials

Related Content

  • Liebherr’s new mixing plant generation
    October 11, 2022
    Liebherr is introducing a new mixing plant generation, with modular design being a key feature. The new generation plants will be available in Germany, Austria and Switzerland from 2023, and will then be made available for world markets.
    Read More
  • Asphalt plants looking at greener production systems
    April 10, 2012
    A wide variety of new equipment and technology to assist production at asphalt plants is about to be launched onto the market, while asphalt producers are continuing to look at greener working practices. Guy Woodford reports. Lintec, in partnership with Loesche, recently created what they say is the world’s first containerised Coal Mill Plant for independent coal dust supply at the jobsite which offers mobility and high economic efficiency through the substitution of gas or oil with coal.
    Read More
  • Asphalt plants looking at greener production systems
    April 11, 2012
    A wide variety of new equipment and technology to assist production at asphalt plants is about to be launched onto the market, while asphalt producers are continuing to look at greener working practices. Guy Woodford reports Lintec, in partnership with Loesche, recently created what they say is the world's first containerised Coal Mill Plant for independent coal dust supply at the jobsite which offers mobility and high economic efficiency through the substitution of gas or oil with coal. The mobile co
    Read More
  • Analysis of the Demand Status of Sand Aggregate
    August 15, 2019
    What is sand aggregate? Sand aggregate is a general term for sand, gravel and other materials in construction projects. It is the main building material for concrete and stone masonry in hydraulic engineering, and it acts as skeleton or filling in concrete. It is widely used in civil engineering such as cement concrete, asphalt concrete, road foundation, railway track slag, and mortar. The classification of sand aggregate Mining machinery can crush large-sized stones into different size stones or
    Read More

Highlighted Content