U.S. Steel announced Monday it secured permission from the Allegheny County Health Department to build a $100 million slag ...

Computed tomography is now doing for ancient metalworking what it once did for medicine, turning opaque fragments of slag into detailed cross-sections of early technology. By peering inside 5,000-year ...

Copper smelting - a critical process in metal production - often generates slag, which contains valuable metals. This slag has historically been thrown away, causing harm to the environment and ...

Copper smelting, a critical process in metal production, often leads to the generation of slag containing valuable metals. Traditionally, this slag has been discarded, causing environmental issues and ...

Add Yahoo as a preferred source to see more of our stories on Google. The site, shown here, was originally excavated during the Soviet period and was relocated using hand draw maps from a 1964 book.

This story is part of The Montana Gap project, produced in partnership with the Solutions Journalism Network. It’s hard to imagine Anaconda without slag heaps. Driving into town, they’re the first ...