期刊
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
卷 50, 期 6, 页码 2612-2622出版社
SPRINGER
DOI: 10.1007/s11663-019-01659-0
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资金
- Australian Research Council (ARC)
The microstructures of porous magnetite formed on gaseous reduction of dense hematite have been examined using high-resolution scanning electron microscopy. It has been shown that cellular pores are formed on reduction in the temperature range 573 K to 973 K (300 degrees C to 700 degrees C). Dendritic shaped gas pores are formed on reduction at temperatures between 1073 K and 1273 K (800 degrees C and 1000 degrees C). The apparent chemical reaction rate constant for the reduction of hematite to magnetite in CO/CO2 gas mixtures has been derived from measurements of product thickness against reaction time; the rate constant is described by the relation phi(CO) = 0.232exp(76,000/RT) mu m s(-1) atm(-1). (C) The Minerals, Metals & Materials Society and ASM International 2019
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