A propane flame is hot enough to melt pure gold. It will also melt gold alloys but the melting process does not separate gold from other elements, like silver or copper. Gold is one of the most expensive elements in the world and is well known for its use in jewelry.
Metallurgical ContentCementationParting by Using Sulphide of AntimonyParting by Means of SulphurParting by Nitric AcidGranulation of the AlloysTreatment of the Gold ResidueTreatment of the Silver SolutionReduction of the Silver ChlorideParting by Sulphuric AcidCommon Parting Process Parting is the separation of silver from gold and a process during which the base metals are separated from both
How do I separate gold from other metals like silver, aluminum etc? This can only be done by refining the alloy. Normally it would be sent to a refiner, as the materials needed are dangerous (e.g., acids) and you would have to know quite a bit of chemistry to do it safely as well as effectively.
After melting the raw gold chunks, we ended up with a button that weighed 7.4 ounces and which assayed at 85.44% gold, 13.23% silver, and 1.33% other (probably copper). My questions are: 1) At what point in this process should we try to separate the silver from the gold chunks2) Could we use aqua regia to first precipitate the silver and then