JANET, Pittsfield A: It is slag, but without seeing it, I cannot be 100 percent sure, just 95 percent sure that isn't from a glass furnace, but rather from an iron furnace. I believe it was during a ...

The Codorus Furnace is one of five ... which removed impurities from the iron. The waste material floated to the top of the stack and was known as slag. The slag was skimmed off the ...

There, Upper Peninsula-mined raw iron ore was heated to extreme temperatures in furnaces ... the volcanic glass known as obsidian is made. Except that in the case of the Leland slag, when combined ...

Leland Blue is an industrial waste known as slag that resulted when molten products in the Leland Lake Superior Iron Company’s furnaces were quickly cooled, creating a glass-like solid in much ...

EAST CANAAN — As I look at the Beckley Furnace, I can imagine an iron worker, covered in ashes and soot, grunting as he pushes a wheelbarrow full of slag over a bridge crossing the Blackberry River.

The first step was stabilizing the ladle slag in a solid state by adding borate glass —a cheap ... Since out-of-furnace slag contains very little iron, it is usually not reused but sent to ...

"Iron slag, the waste material left behind after smelting and blacksmithing, is not an uncommon find on archaeological sites but the survival of metalworking hearths or furnaces is much rarer.