A method 1, and further including {HEAD ~ the step} of at least partial combustion of CO and H2 containing in flue gases above melt level in {TAIL ~ the inner chamber} 
A method 1 , and further including { HEAD ~ the step } of at least partial combustion of CO and H2 containing in flue gases above melt level in { TAIL ~ the inner chamber }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL