Tailings

（重定向自Culm bank）

Yellow boy in a stream receiving acid mine drainage from surface coal mining.

Emergency tailing ponds constructed in response to the 2015 Gold King Mine Spill in Colorado, pictured on August 7, 2015. The ponds were constructed to contain a spill created by EPA workers, while trying to install a cleanup system on the main tailing pond for the long closed mine.

Tailings, also called mine dumps, culm dumps, slimes, tails, refuse, leach residue or slickens, are the materials left over after the process of separating the valuable fraction from the uneconomic fraction (gangue) of an ore. Tailings are distinct from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed. The amount of tailings can be large, ranging from 90–98% for some copper ores to 20–50% of the other (less valuable) minerals.

单词	Culm bank
释义	Culm bank 英语百科 Tailings （重定向自Culm bank） Tailings, also called mine dumps, culm dumps, slimes, tails, refuse, leach residue or slickens, are the materials left over after the process of separating the valuable fraction from the uneconomic fraction (gangue) of an ore. Tailings are distinct from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed. The amount of tailings can be large, ranging from 90–98% for some copper ores to 20–50% of the other (less valuable) minerals.
随便看	genus Acrocephalus genus acrocephaluss genus Acroclinium genus acrocliniums genus Acrocomia genus acrocomias genus Acropora genus acroporas genus Acrostichum genus acrostichums genus Actaea genus actaeas genus Actias genus actiass genus Actinia genus actinias genus Actinidia genus actinidias genus Actiniopteris genus actiniopteriss genus Actinomeris genus actinomeriss genus Actinomyces genus actinomycess genus Actitis