In the field of extractive metallurgy, mineral processing, also known as ore dressing, is the . For instance, stamp mills were used in Samarkand as early as 973. They were also in use in medieval Persia. By the 11th century, stamp mills were in.
To Float or Sink: A Brief History of Flotation Milling Mining History .
opment of the twentieth century mining and milling industry. . tation mill was established at Broken Hill, Australia. Soon . tion, were effective in processing gold ore, flotation opened Robert Richards, Textbook of Ore Dressing (New York &.