29 Mining | MineralsFocus 2/2013 S ince the 1950s, belt conveyors have become established as an effective means to transport bulk material. The largest and most power- ful belt conveyors are found in mining applications, which were the first to be equipped with converters. In fact, vari- able-speed belt conveyors use up to 20 percent less electricity, especially in view of the fact that they function as regular motors as well as generato

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