First allair-Jig Plant in Industrial Operation Forecast for the Coal Prep 2003

摘要

The newly developed dry separation process has been put into operation successfully. Since September 2002 the 100 t/h allair-plant has been upgrading 50-0 mm raw coal at Holmes Limestone Company in the state of Ohio/USA. After six months of testing a 50 t/h pilot plant on a rental basis Holmes Limestone Company was convinced of the efficiency and reliability of this new dry separation system and purchased the industrial scale plant with 100 t/h capacity. The allair jig is unique among dry cleaning devices as it replicates most of the operating principles of the wet alljig: The hutch structure uniformly distributes air to all areas of the jigged bed. A pulsed air stroke is superimposed upon the constant stream of rising air currents, allowing independent control of the stroke amplitude, frequency and acceleration. Thus stratification of the feed material is optimized.