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Two Liebherr crawler excavators are operating in Vosges granite quarry, France

Published by , Deputy Editor
World Cement,

Both R 956 excavators are being used in two different quarries in La Bresse and Senones, France, to position heavy weights before mining, and to load trucks for drillers and miners to move large rocks. Supported by local authorised retailer, Tilmat, the company decided on Liebherr-France SAS's crawler excavators.

Liebherr crawler excavators are in operation in two quarries where the granite types ‘Gris bleu des Vosges’, ‘Feuille morte de Senones’ and ‘Rouge corail’ are mined. The annual production of 5000 m3 of end and processed products is primarily intended for urban development (flagstones and cobblestones) and funeral monuments. In addition to the materials mined, 15 000 t of gravel and 40 000 t of stone debris are recycled and produced in La Bresse.

The choice of the R 956 was based upon the consideration of overall costs throughout its life cycle. Petitjean decided on Liebherr to satisfy its strict requirements regarding consumption and productivity. It was the low fuel consumption of the R 956 that impressed the company – in economy mode, the machine consumes an average of 29 l/hour and so offers maximum cost-effectiveness when used. When procuring these two 55 t machines, costs over the entire service life of the product were taken into account, in addition to the purchase price, with the objective of ensuring maximum profitability and productivity of excavators when used.

The R 956 is highly suited to being used in these quarries, as it is an appropriate size, the design is robust, and the high loading capacity helps to ensure high productivity. The two machines developed and manufactured in Colmar, France, meet Stage IV emissions standards and have a power output of 250 kW/340 hp. The shovels have a specially extended (but not very broad) profile. This profile should allow them to hold the granite blocks better. After having already spent over 500 hours in the machine cabs, both operators are satisfied in terms of application, power and comfort.

Petitjean is the last company to mine granite blocks in the Vosges. It aims to reuse the local, natural raw material in order to conserve mining.

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