I'm researching ways in how to salvage gold from old electronics. I think I got the process down but I have one question. When you have salvaged the gold from the electronics you are left with gold flakes.
This you want to melt down into a single piece of gold. I have been told that the addition of borax powder reduces the melting temperature of gold, but I'm unsure of how much. My blowtorch can go to 1000 °C and I want to know if this would be adequate to melt the gold/borax mix.