Upon attainment of {TAIL ~ the desired lower temperature}, the reducing agent is introduced into {HEAD ~ the chamber} on a body reduction pan composed of a high temperature stainless steel or suitable refractory material 
Upon attainment of
Upon attainment of { TAIL ~ the desired lower temperature } , the reducing agent is introduced into { HEAD ~ the chamber } on a body reduction pan composed of a high temperature stainless steel or suitable refractory material
REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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