Journal
IRONMAKING & STEELMAKING
Volume 41, Issue 8, Pages 561-567Publisher
MANEY PUBLISHING
DOI: 10.1179/1743281214Y.0000000179
Keywords
High alumina iron ore; Gas-solid reduction; Reduction degree; Kinetic experiments; XRD examination; SEM analysis
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To understand the reduction process of pellets made from high alumina iron ore from Guangxi Zhuang Autonomous Region, kinetic experiments, X-ray diffraction examination and scanning electron microscope analysis were adopted. The results show that temperature, a critical factor, increasing from 850 to 1050 degrees C can increase the reduction degree from 31.03 to 55.01%. With increasing hydrated lime addition, the reduction degree increases. Calcium oxide can participate in the solid reaction and affect the mineral structure of ore, but cannot completely prevent the formation of fayalite and hercynite. As a result, the reduction improvement with calcium hydroxide addition is limited.
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