PELLETS USEFUL IN SHAFT FURNACE DIRECT REDUCTION AND METHOD OF MAKING SAME

摘要

Iron ore or concentrates containing about 0.5 to about 3.0% silica, 0.5 to 1.0% bentonite and 96.5 to 99.0% iron oxide together with 7.0 to 12.0% moisture is pelletized, the pellets are surface-coated with about 1 to about 4.5% limestone and fired at a temperature of about 2100.degree. to about 2400.degree.F., the formed pellets being suitable for direct reduction temperatures above 1400.degree.F in a shaft furnace with a minimum of clustering.