Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

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Question about unexpected silver appearance after smelt (1 reply and 1 comment)

2 years ago
BentFunky 2 years ago

I’m pretty new to pyrometallurgy, so apologies if this is a noob question.

Asking for help understanding the appearance of metal retrieved after smelting gold ore.

I was testing/tuning a new furnace by smelting a small amount low quality gold ore. I used one oz of (sterling) silver as a collector metal. Flux was borax and fluorspar.

After smelting ore and removing resultant metal from slag, I was surprised by its appearance. When I’ve done this in the past, I’d end up with metal that looked like one would expect, silver with some gold mixed in.

Results of this most recent smelting operation were unexpected were different.

The resultant metal was pearl white with a surface that looked crystallized. Also had a pearl like luster. 

Would appreciate thoughts on why this metal looks like it does. See attached pic.




Wieslaw Wodecki
1 year ago
Wieslaw Wodecki 1 year ago

Ten stop wygląda rewelacyjnie .Kolor perłowy stopu z małym dodatkiem Cu wyglądałby jeszcze lepiej.  Wyroby jubilerskie z takiego stopu i takim wyglądzie mogą być dużo warte -nikt takich nie robi.


5 months ago

Interesting. Hadn't considered that. I'll have to see if I can replicate the results. Appreciate the idea.

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