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Ball Mill and Stripes

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Ball Mill Features
  • The mineral entering the ball mill is fractured by:
     - Cascade cycle (impact fracture.
     - Interior shear (abrasion or attrition fracture)
  • Operates between 35% and 45% fill level.
  • Middle grinding: steel balls.
  • Feature: particle size between 0-200 microns
  • Generally works in a closed circuit.
  • For primary grinding uses balls 2 "to 4" in diameter and secondary grinding balls 3/4 "to 2" in diameter.

Bar Mill Features

  • Accepts feed size about 2 ".
  • Load rollers 35% volume more.
  • Grinding media: forged steel bars.
  • Feature: Particle size of 5 to 10 mesh (open circuit) or up to 35 mesh (closed circuit).
  • The ratio between length and diameter ranges from 1.5 to 2.5
  • Work in open and closed loop.
  • High carbon steel bars range from 1 1/2 "to 4 1/2" in diameter.

Pieces
  • Feed cover
  • Interior Lining
  • Exterior Lining
  • Trunnion
  • Trunnion Liner

Top of download

  • Interior Lining
  • Exterior Lining

Cylinder

  • Lateral Feed Cover Lining
  • Central A Lining
  • Central B Lining
  • Lateral Discharge Cover Lining 
Results

At SOUTHERN PERU TOQUEPALA, record life of ball mill liners exceeding 10% of the standard, i.e. improved the duration of 16-month linings to 17.5 months, currently operating in 9 of the 23 mills.

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