Antrope

In Attichy-Bitry, Oise, Antrope, a subsidiary of Eiffage Travaux Publics, operates an alluvial quarry where it extracts sand for the concrete market. The company turned to CDE to replace an ageing mobile installation which was no longer reaching the required performance level (screen belt conveyor and wheel sand washing machine). Unusable in its original state, the sand extracted in the Antrop quarry has to be washed and screened. For 6 years, the operator had been using a screening belt conveyor but “its production was limited to 50t/h and the sand wasn’t processed well enough or dried sufficiently”, says Samuel Wendel, head of operations at Antrope.

Run by an electric actuator (less than 200kW), the M 2500 washing unit produces four different types of sand: 0-4mm, 5-10mm (which is taken up by the water circuit), 10-20mm and over 20 mm. Thanks to its automatic system, the M2500 can run for a full cycle, all year round, without the need to intervene in the washing unit. It’s only a one man job to start up the washing unit, supply the unit with sand and load the trucks that come to get supplies. Another special feature is that there is no weighbridge, and everything relies on the loader and its on-board weighing system. Afterwards, all the data from the weighing system can be transferred to Antrope's headquarters for integration into a standard weighing software.

For the operator, the objective has been achieved, since he has succeeded in producing 100-120 t/h of sand that can be sold after 24 hours of storage, to the operator’s great satisfaction. This sand is intended for use in concrete applications, especially in batching plants.