For an overview of how Nucor became #1 in the US steel industry, see "American Steel" (1992) by Richard Preston. The author was present for the building and startup of Nucor's first continuous thin sheet casting mini-mill. Nucor bought a new experimental continuous caster from a German company, after trying to build their own, and built a mill around it. This plant could turn scrap metal into sheet steel. "You could…
The chapter describing the accident (where a ladle of molten steel fell and the steel drained into a depressed area with standing water) is horrific. It's fortunate the body count wasn't higher.