A method 1 operated as a continuous process with {HEAD ~ metal oxide} being provided to {TAIL ~ the crucible} and recovered metal being collected at the lip 
provided to
A method 1 operated as a continuous process with { HEAD ~ metal oxide } being provided to { TAIL ~ the crucible } and recovered metal being collected at the lip
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH