RWE Power - Garzweiler opencast mine - Bucket-wheel excavator 261 Bulky goods separation from the stream of conveyed coal

摘要

Bucket-wheel excavator 261 is deployed on the two upper benches of the Garzweiler opencast mine. Large stones (Fig?ure 1) and other bulk material, the separation of which caused considerable output losses in the past, are frequently found in the mining horizons in situ. Stones and other bulk material that are not detected cause substantial damage to the machine belts on the excavator, to the downstream transfer substations of the belt conveyors, and to the spreader, and generate associated main?tenance costs. In addition, the stone-separation method used so far carries a serious risk of injury for the employees concerned. A sensor-based stone detection system on the one hand and an automatic bulk material discharge system on the other were developed to improve the situation.