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