A method of extracting ??? Pb, Hg, Zn and other contaminating metals ??? Using the induction heating ?????More detailedFoundry ??? Wikipedia, the free encyclopediaCertain fluxes may be used to separate the metal from slag and/or ??? used to melt precious metals to furnaces ??? use crucible furnaces or induction ?????More detailed how to separate gold from metalextracting gold with electrolysis pdf