1) Industrial process
Found on
https://www.crosswordclues.com/clue/dump-leaching
Dump leaching is an industrial process to extract precious metals and copper from ores. Dump leaching is similar to heap leaching, however in the case of dump leaching ore is taken directly from the mine and stacked on the leach pad without crushing where, in the case of gold and silver, the dump is irrigated with a dilute cyanide solution that pe...
Found on
http://en.wikipedia.org/wiki/Dump_leaching
No exact match found.
