15/06/2020 · Processing, smelting and refining gold | World Gold Council. The Miller process uses gaseous chlorine to extract impurities when gold is at melting point; impurities separate into a layer on the surface of the molten purified gold. The Miller process is rapid and simple, but it produces gold of only about percent purity.
Rough Science . New Zealand . Treasure Hunt .... ›Home›New Zealand›Treasure Hunt. Extracting Gold from Rock by Mike Leahy. Crushing the rock Powdering the rock Mercury Where could we find mercury? The amalgamation Baked potatoes. The Challenge