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 . The process of panning and sifting for gold uses both of these methods.
Gold extraction refers to the processes required to extract gold from its ores. This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore. Gold mining from alluvium ores was once achieved by techniques.
Mineral processing, art of treating crude ores and mineral products in order to . For these sampling machines to provide an accurate representation of the whole lot, . as in the case of gold and lead, the method has been generally suitable.