Here is some more useful information.
http://www.stld.com/the-steelmaking-process/
http://www.stld.com/wp-content/themes/flatroll/content/Butler-maps.pdf
http://www.industryweek.com/global-economy/first-ever-danieli-micromill-started-cmc-arizona
http://www.castrip.com/Advantage/advantage.html#Min%20Env%20Impact
"No soup for you!" - Yev Kassem (from Seinfeld)
Mini in relation to an integrated steel mill. There are much smaller mini-mills than this one.
Some companies are working on developing micro-mills that should be able to perform the same functions as some types of mini-mills in 1/6th the space.
"Mini," in relation to what? Judging by the size of the rail cars in the overall view, an uncompressed model would be an overload for my 2-car garage in HO scale.
A good subject for a long-wall backdrop painting, or mostly virtual in the operating aisle.
Chuck (Modeling Central Japan in September, 1964)
These should be helpful.
http://www.northstarbluescope.com/Steel_VirtualTour.asp
http://www.northstarbluescope.com/Steel_MillSchematic.asp