Patterson Industries Ball Pebble Mills
The types "D" (nonjacketed) and "DJ" (jacketed) Ball or Pebble Mills are the most popular PATTERSON designs furnished with either of three types of linings or extra heavy chrome manganese steel shell. Lined mills are charged with Flint Pebbles, Porox Balls (Silica based), or Arlcite Balls (Alumina based) and unlined mills use ChromeMolloy Steel Balls.