A mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting .. Attrition between grinding balls and ore particles causes grinding of finer particles. . SAG mills are primarily used at gold, copper and platinum mines with applications also in the lead, zinc, silver, alumina and nickel industries.
Feb 27, 2012 . sainik ore dressing in singrauli petrorexsainik ore dressing in singrauli sainik . the contact surface of ball and ore and strengthens the grinding. .. of the 25 Sainik Schools of India. . the recovery of gold from gold ore; silver.