C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/10
C22B 1/14 (2006.01) C22B 1/24 (2006.01)
Patent
CA 1044897
ABSTRACT OF THE DISCLOSURE 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° to about 2400°F., the formed pellets being suitable for direct reduction temperatures above 1400°F in a shaft furnace with a minimum of clustering.
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