Metal ores are naturally occurring rocks that contain metals or metal compounds in sufficient amounts to make it worthwhile extracting them. The method used to extract a given metal from its ore ...
TAJIMI, Gifu Prefecture—Municipal officials here announced a plan to begin extracting and selling precious metals from cremated human remains starting in the next fiscal year. This initiative ...
Her company has designed a means of extracting nickel and other metals from minced-up old batteries - so that these materials can be used again. It's called electro-extraction and it works by ...