Indium is leached from slag and dust of zinc production and the metal further purified by electrolysis.
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Professor Sisson determined that the steel was attacked by a liquid slag which contained iron, sulphur and oxygen.
Wooden huts lie within a few hundred metres of a toxic slag heap.
But perhaps you need more exposure to slag, sewage pumps, adhesion promoters, viscous fluid dosing machines and state-of-the-art grease cartridges.
The actual is sliced, diced and winched forward, only to tumble off time's assembly-line into the great slag-heap of now.
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He had seen the low slag heap of our culture and assumed it was a true expression of who we are.
It was created in the 1930s from a huge slag heap resulting from one of the largest iron and steelworks in Europe.
We thought that only man could make something as forbidding as a slag heap, but apparently gods are capable of ugliness, too.
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He cleaned them in the early years, when they'd hauled lime and slag all day on the roads round Carlisle, and he was still cleaning them in 1985 when he had 26 of them.
London (CNN) -- Coal slag heaps up to 450-feet high may not seem the obvious candidates to join a list that includes the pyramids of Egypt, the Great Wall of China, and Yellowstone National Park.
Nonsense, says Mike Godwin, staff counsel for the Electronic Frontier Foundation, who argues that because all of us have equal access to it, the Net relegates libel and slander suits to the slag heap of history.
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