Low Temperature Reduction of Hematite in Red-Mud to Magnetite View Full Text


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Chapter Info

DATE

2017-02-12

AUTHORS

Sumedh Gostu , Brajendra Mishra , Gerard P. Martins

ABSTRACT

Red-mud, the residue generated from the Bayers processing of bauxite ore in Jamaica was subjected to a low temperature reduction process. Hematite (~60 m%) was reduced to magnetite employing a gas based mixture of CO, CO2 and N2 as a diluent. Extensive thermodynamic study was conducted to identify the stability region for magnetite. ‘Optimal conditions’ for the gas-phase reduction were determined to be: a processing temperature of 540 °C ± 10 °C, partial pressures CO(g) and CO2(g) each of 0.070 atm (bar) ± 0.001 atm (bar)/inert diluent-gas: N2(g), for a conversion-time of 30 min. Mathematical model for reduction based on unidirectional diffusion is also formulated in this paper. More... »

PAGES

67-73

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-319-51541-0_10

DOI

http://dx.doi.org/10.1007/978-3-319-51541-0_10

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1083757035


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