In the field of extractive metallurgy, mineral processing, also known as ore dressing, is the . Before the advent of heavy machinery the raw ore was broken up using hammers wielded by hand, a process called "spalling". Before long.
Mineral Processing and Ore Dressing 911 Metallurgist
Mar 18, 2017 . Before the event of ore dressing, crude ores were shipped directly to the . then the ore is subjected to a separation through a heavy mineral suspension. . These may include standard equipment for amalgamation, flotation.