A closer look
Lighting an iron foundry is a permanent, wildly expensive commitment. A massive industrial blast furnace requires incredibly precise thermal expansion of thousands of firebricks lining the interior. If you ever turn the furnace off, the cooling metal and rapidly shrinking bricks will completely shatter the internal structure. To avoid ruining a multimillion-dollar facility, they are fueled non-stop, roaring away at three thousand degrees every single day for over twenty straight years.
