Robust, durable screening solution for Finnish firm Kreate

Screening topsoil normally does not require a trommel with a two deck Vibrating Grid, nor a drum constructed using hardox steel. However, that is exactly the machine specification which EDGE Innovate supplied to Finnish company Kreate for that application. Why go to such lengths you ask? With sticky top soil contaminated with hard stone from 20mm up to large boulders 300mm in diameter, this purpose built piece of equipment was the only solution available. Such was the type of material found at the Kreate owned quarry and the necessity of a particular specification of trommel to meet the customer’s expectations.

Just as rivers carry along all sorts of debris and silt that eventually accumulates to form deltas, glaciers transport all sorts of dirt and boulders that build up to form moraines.The material deposit at the Kreate owned quarry, adjacent to the Helsinki Vantaa airport, is thanks to this process. Typically these material deposits consist of soil and rock of which this quarry is no different. Primarily this Vantaa quarry provides vital aggregate and top soil to a number of Kreate’s infrastructure projects throughout the region.

Kreate was formed in 2014 through the merging of specialist infrastructure contractors Fin-Seula, Kesälahden maansiirto and Insinööritoimisto S Rantala. Now established as a leading Finnish infrastructure contractor, Kreate employs 250 structural experts providing comprehensive solutions for the bridges, road and rail, foundation, energy, industrial, environmental and geotechnical construction segments.

In order to extract aggregate at their Vantaa site, vast amounts of earth must first be excavated. Large stockpiles of earth can be observed throughout the quarry and this is where the EDGE TRT622 track trommel comes to the fore. EDGE Innovate’s Finnish distributors Kivisampo made successful delivery of a fully customised TRT622 Series trommel and a MS50 mobile stockpiler in the winter of 2014.

Supplied with a 2 deck vibrating live head, hardox lined hopper, hardox steel drum with 16mm mesh screens, the EDGE TRT622 delivers Kreate with a robust, durable unit that has the ability to produce 300 plus tonnes per hour whilst only consuming an average of 17 in that same time frame. Fitted with 6mm hardox lined hoppers, impact bars and 4 ply belts, the folks at EDGE Innovate have taken no chances. Fully customised to suit the customers’ requirements and challenging application, the TRT622 radial conveyor has been replaced with a 50ft mobile conveyor. A hydraulic radial wheel drive fitted to the MS50 provides the customer with a throughput of up to 600 tonnes (661UST) and a radial stockpile capacity of 1528m³ (1999 cubic yards). Hydraulically coupled to the TRT622, the MS50 offers the lowest cost radial stockpiling solution on the market.

Material is fed onto the track trommel’s 150mm (6”) bofor deck using a Doosan DX225LC excavator, the 100mm (4”) bottom deck rejects 4” plus material allowing the 4” minus to pass onto the drum to be screened via the bolt on 16mm mesh screens. The EDGE trommel effectively produces 3 different products; 4”+ oversize aggregate, 16mm to 100mm medium oversize aggregate and minus 16mm topsoil to be used on landscaping projects.

Kreate not only point to the fact that EDGE Innovate are the only manufactures to offer a mobile trommel with a twin deck vibrating grid; other design features such as the TRT622’s unique load sensing hydraulic drive system, ecopower saving functionality and the user friendly HMI control panel were all deciding factors that led them to choosing EDGE Innovate when selecting a suitable product that would fulfil their needs.