Long mine conveying systems with adjustable frequency drives (AFD)

The mining project in Colorado required the replacement of an existing underground and surface railway transportation system, which transferred ore from underground train loading bins to a surface crusher and mill stockpiles. It was replaced by an underground crusher, apron feeder, accelerator conveyor, two underground conveyors, one overland conveyor, and stockpile conveyors. The project scope included the design of power supply and distribution, application of adjustable frequency drive systems, and design of conveyor and associated material handling equipment. The design included the integration of all auxiliary protection and control sub-systems