1) Copper
Found on
https://www.crosswordclues.com/clue/flash-smelting
Flash smelting (Liekkisulatus) is a smelting process for sulfur-containing ores including chalcopyrite. The process was developed by Outokumpu in Finland and first applied at the Harjavalta plant in 1949 for smelting copper ore. It has also been adapted for nickel and lead production. A second flash smelting system was developed by the Internation...
Found on
http://en.wikipedia.org/wiki/Flash_smelting
(from the article `metallurgy`) Flash smelting is a relatively recent development that has found worldwide acceptance. It is an autogenous process, using the oxidation of sulfides ...
Found on
http://www.britannica.com/eb/a-z/f/34
No exact match found.
