TY - GEN AU - Tress,Jack E. AU - Stickney,William A. AU - Hunter,W.L. ED - United States. TI - Continuous charging and preheating of prereduced iron ore T2 - Report of investigations PY - 1975/// CY - [Washington] PB - U.S. Dept. of the Interior, Bureau of Mines KW - Iron ores KW - Heat exchanges KW - Steel ER -