Process for the production of spongy iron oxide having high...

Details Process for the production of spongy iron oxide having high... Process for the production of spongy iron oxide having high...

B - Operations, Transporting

01

J

B01J 20/06 (2006.01)

Patent

CA 2065948

ABSTRACT OF THE DISCLOSURE: The invention relates to a process for the production of iron oxide having high reactivity and high specific surface, from natural and/or synthetic iron oxides having low reactivity and low specific surface. This process comprises the steps of calcination, reduction and cooling, and is characterized by the fact that it comprises the calcination of natural and/or synthetic iron oxides, with a particle size smaller than 3.0 mm, at temperatures in the range of 400 to 1000°C, reduction of the referred calcined oxide with a gaseous composition composed of 15 to 40% of CO (carbon monoxide), 5 to 20% of CO2 (carbon dioxide), 1 to 30% of H2 (hydrogen) and 10 to 70% of N2 (nitrogen), followed by cooling, in reducing or neutral atmosphere, to temperatures lower than 140°C.

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