I have made a few attempts to make Nordic Gold (89% copper, 5% aluminum, 5% zinc, 1% tin). I am having trouble with the Zinc boiling away, which boils at a much lower temperature than copper melts. I usually have the temp of the foundry at around 2,000F - 2,200F to melt the copper.
I have tried melting all 4 metals together.
I have tried Adding the zinc last once everything else is molten
I have tried adding melted zinc to the other 3
Every time I try to make it, it seems like a lot of the zinc boils away. All of a sudden I get a bright flash and big plume of smoke coming out of my foundry.
I have seen some videos of people making nordic gold, but they never seem to have the same reaction that I do. Is there some trick that I am missing?