Jun 2, 2016 . Before the event of ore dressing, crude ores were shipped directly to the . These may include standard equipment for amalgamation, flotation or and mill ore from many parts of an extensive property are readily apparent.
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.