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| Contractors World International |
2013 Vol 4 No 1 | |
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LIBRARIES • back issues
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 PAGE 13 of 43 
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Crushing granite in Sweden Mobile Kleemann plant combination working in hard rock. Scandinavia is known for its hard rock deposits. In the south of Sweden, at the Boda quarry, where a particularly hard granite can be found. TJ Gräv AB from Brandstorp has the task of processing 40,000 tons 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 a Mobicat MC 120 Z type mobile jaw crusher primary unit. The crusher processes 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 system’s maximum output capacity of approximately 280 t/h cannot be reached, it is still possible for 1000 tons of these stone chips to be produced every day. Tomas Johansson, owner of TJ Gräv AB, considers the Kleemann plant systems to be particularly well suited for this purpose: “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 pre-screening 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 pre-screening unit.” Aftersales - an important factor Whether for a quarrying contractor or the owner of a quarry, the highest level of equipment availability is always of extreme importance. Here, Johansson depends on the service of the Wirtgen Group subsidiaries. Click here for more information >>> Kleemann Crushing and Screening |
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| PAGE 13 of 43
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Contractors World Magazines are published by VVV Limited Publisher: Roger Lindley Page updated: November 2013 |
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Kleemann plant systems - particularly well suited
