About 5,000 years ago, people living in what is now Iran began extracting copper from rock by processing ore, an activity ...

Texas-based Heidelberg Materials North America has purchased steel mill slag processor Walan Specialty Construction Products.

U.S. Steel’s notoriously outdated Edgar Thomson Works handles the molten substance left behind by smelting iron ore the same way it did 150 years ago: by dumping it into slag pits. They’re as low-tech ...

Much of northwest Ohio is a quiet, sparse grid of farms. Right in the middle of it, just 7 miles south of the Michigan border, is Delta Raceway. It calls itself the state’s premier motocross track.