From: whit3rd@gmail.com   
      
   On Thursday, January 16, 2020 at 2:47:57 PM UTC-8, Michael Terrell wrote:   
   > On Thursday, January 16, 2020 at 1:54:51 PM UTC-5, default wrote:   
      
   > >...  I remember a   
   > > documentary about steel recycling where they were using carbon arc   
   > > furnaces to melt and make steel from ferrous waste.   
   >   
   >    Do you have any idea how much more is needed every year? Remelt couldn't   
   begin to supply enough.   
   >   
   >    Would you trust a bridge bout of cheap remelt?   
      
   You have no choice, if you aren't doing engineering specification and   
   inspecting the alloys.   
   There's strength specs, and structural steel includes the lowest grades (which   
   is OK   
   when you use a lot of it).    Soft steel bends rather than breaking, that's a    
   virtue.   
      
   But yes, remelt cannot supply enough steel, there's still mountains of ore in   
   Australia, furnaces in   
   Korea, Germany, Poland etc.  and plumes of exhausted CO2.   The coal for   
   smelting ore   
   to iron is high-grade (low sulphur) stuff, converted first to coke for   
   purity.   To my knowledge,   
   the only substitute for coal is traditional Swedish steel made with charcoal   
   (still carbon, of course).   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)