Re: Copper behaviour


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Posted by Patrick Fox on October 13, 1998 at 17:24:53:

In Reply to: Copper behaviour posted by Robert Dilley on October 13, 1998 at 16:08:16:

I'm no metallurgist, but I'd always assumed that the point was that copper would oxidise at a moderate heat - presumably to a black powder. Gold, of course, being less reactive, wouldn't. It would therefore be inherently impossible to "smelt" copper which would have to be separated by a chemical process (is it? - as I said, I'm no metallurgist).

This explains points 1 & 3 - after "smelting" the copper was a black powder indistinguishable from ash.

Point 2 - I've always just gone along with Dick's explanation, which certainly seems reasonable in a home made blast furnace. Perhaps, for example, the flow of air from the bellows was stronger up one side than the other, leading to greater heat on that side.

If anyone knows better with respect to copper oxide I'd be fascinated to know.

Cheers
Patrick


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