They are evaporating the water/moisture that is still on the gold flakes to get the correct weight.
There are still impurities; this is removed during the ingot-making process (smelting).
You get more money for gold when selling it if its actually just gold.
They melt it to get rid of all the rubbish that is also in gold.
From 2020 there are plans to begin the manufacture of gold and sell the byproduct (electricity) by 2099 the company expects to begin looking at feasible ways of space mining for HG, favoring planets with volcanic activity. This will in effect make earth gold WORTHLESS. hg being the symbol for mercury which during nuclear fission turns into gold.
To get rid of impurities. THe gold melts and being dense floats to the top.
You see Parker cooking the clean up in his bus, and Fred cooking his gold. Why do they do this?#goldrush
