Tailings, also called mine dumps, culm dumps, slimes, tails, refuse, leach residue or slickens, . The extraction of minerals from ore can be done two ways: placer mining, which .. assist in water recovery which is a major issue as many mines are in arid regions. .. "Can African machine produce a promising future in Butte?".
separation products, middlings and tailings (waste products) as well as . Generally the particle size of alluvial gold falls into the range 5 mm to 100 pm. Several . This is due to both poor technique and, in some cases, poor equipment; African.