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The word "gringo" did not originate during the Mexican–American War (1846–1848) as a corruption of "Green, go home!", in reference to the green uniforms of American troops. The word originally simply meant "foreigner", and is probably a corruption of the Spanish word griego for "Greek" (along the lines of the idiom "It's Greek to me ").
At the direct reduction plant, pellets are charged in Midrex [Wikidata] [4] shaft furnaces after misco-grain screening (less than 5mm). Two reducing gases (derived from cracking natural gas or methane , consisting of CO and H 2 ) are injected into the furnace, combine with oxygen from the pellets resulting in CO 2 + H 2 O.