ROBERT J RYGIEL
Engineers in Monroeville, PA
License number
Pennsylvania PE008518E
Category
Engineers
Type
Professional Engineer
Address
Address
Monroeville, PA 15146
Professional information
Method Of Reducing Iron Ore
US Patent:
3957486, May 18, 1976
Filed:
Aug 9, 1974
Appl. No.:
5/496223
Inventors:
Jesus A. Sandoval - Hempfield Township, Westmoreland County PA
Robert J. Rygiel - Monroeville PA
Robert J. Rygiel - Monroeville PA
Assignee:
United States Steel Corporation - Pittsburgh PA
International Classification:
C21B 1302
US Classification:
75 34
Abstract:
Pelletized iron ore is introduced into a shaft furnace and reduced in a countercurrent stream of reducing gas at a hot zone temperature of 1375. degree. F to 1700. degree. F. The pellets have a low silica content and, prior to indurating, a high moisture content, providing a highly porous texture which results in improved reducibility.