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