Mobile Kleemann plant combination working in hard rock

Scandinavia is known for its hard rock deposits. In the south of Sweden, or the Boda quarry near the small town of Vrigstad to be precise, a particularly hard granite can be found. TJ Gräv AB from Brandstorp has the task of processing 40 000 t of this material.

The feeding material is very hard rock with a compressive strength of over 300 MPa in places. It is charged at a size of up to 1000 mm edge length to the primary crusher, which is a Mobicat MC 120 Z type mobile jaw crusher (Fig. 1). The MC 120 Z crushes the material to approx. 0-200 mm and transfers it directly to the downstream crushing system, a Mobicone MCO 11 S type mobile cone crusher. With its three screening decks, measuring 2050 mm x 5000 mm (lower deck: 4800 mm), this has the challenging task of producing final grain sizes of 0-8 mm, 8-14 mm and 14-22 mm in one process. In this case, a relatively large amount of material is being circulated through the system, which of course has an effect on the overall discharge rate of the plant. Even though the MCO 11 S system’s maximum output capa­city of approx. 280 t/h cannot be utilised as a result, it is still possible for 1000 t of these stone chips to be produced every day.

Tomas Johansson, owner of TJ Gräv AB, considers the Klee-mann plant systems to be particularly well suited for this purpose (Fig. 2): “Both plant units have a diesel-electric drive system, which has a very favourable effect on fuel consumption. Not only that, they are built very sturdily.” But other features of the plant system are also important to Johansson. “We sometimes have operations in rock where prescreening is especially important. There are times when the end product has to be almost completely free of organic particles and this can only be achieved if the cone crusher is equipped with an independent prescreening unit.” Moreover, as a quarrying contractor, it is important to him that the plant systems are relatively easy to transport and can be made ready for operation quickly on-site. In addition, the highest level of equipment availability is always of extreme importance. Here also, Johansson can count on the familiar good service of the company.


Related articles:

Issue 2014-05

MR 122 Z impact crusher – ideal for concrete production

With an MOBIREX MR 122 Z impact crusher from Kleemann, the Scottish quarry operator, Grange Quarry Limited, recently strengthened their fleet of machines. Founded in 2000, Grange Quarry Ltd is now one...

Issue 2012-06

Mobile screen plants – innovative and high performance

Kleemann is renowned for its innovative and high performance mobile crusher plants. Be it in the most diverse natural stone applications or in the recycling of asphalt, concrete or mixed rubble, at...

Issue 2009-10 FOCUS?INDUSTRY

Mobile plant replaces stationary plant

Patersons Quarries Ltd. in the Scottish county of Lanarkshire has operated the Dunduff Quarry in Kirkmuirhill since the beginning of the 1980s. The hard rock found in the quarry is dolerite...

Issue 2017-11

Kleemann crushing plant MC 125 RR crushes 600 tons an hour

Natural stone processing often requires individual solutions to guarantee the ideal preparation of special stone. At bauma 2016, with its MOBICAT MC 125 RR Kleemann GmbH presented such a special...

Issue 2020-04-05 Line coupling for optimal performance

Processing of basalt for the expansion of Vietnam’s infrastructure

T?he up-and-coming metropolis of Lang Son on the border with China and a congested highway – the National Route 1A – to the capital Hanoi: A KLEEMANN plant train arrived in the north of Vietnam...