Coal age

• 

  Año 2007, Vol. 112, Número 5

  • FEATURE ARTICLES

    • Screening technology reduces ash in spiral circuits

      P.E. Paul Brodzik

      págs. 22-24

      

    • Longwall USA 2007: Pittsburgh plays host to world's largest longwall expo

      Steve Fiscor (ed. lit.)

      págs. 26-40

      

    • Longwalling in wyoming: PacifiCorp's Jim Bridger mine goes underground in a big way

      Lee Buchsbaum

      págs. 42-46

      

    • Power play: New electric motors, drives and controllers designed for mine-duty service

      Russell A. Carter (ed. lit.)

      págs. 48-50

      

    • Prep plants adopt paste thickener for refuse disponsal

      Bob Cook, Jerold Johnson, Steve Slottee

      págs. 56-60