Відео

maybe silver with an admixture of sulfur, but I'm not sure

It's not Silver, they're separating ores from impurities using the Froth Floatation process. The bubbles formed up in the form of froth contains metals which are now pure from impurities. It is Lead, or Copper with Sulphur impurities.

​@@junaidhasrat11 So the minerals come out with foam, what next to separate the metals completely? I want to take a course to separate precious metals from ores using this process do you have any recommendations?

@@hosammohamed7107 it'd be better if you consult professionals about metallurgy, I'm just a student and it's the first time I've studied about it. About your question, the metal foam is then carried out on various processes like addition of froth stabilizers and removal of slag and then pure ore is obtained which is further purified to obtain purest metal from the ores.

@@junaidhasrat11 What chemicals are used to create these foams?

I think so

It's the Froth Floatation process, used to separate ores from impurities. Many additives are required to stabilize the process and keep it going.