Dolochar as a reductant in the reduction roasting of iron ore slimes |
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| Authors: | Swagat S Rath Danda Srinivas Rao |
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| Affiliation: | Institute of Minerals and Materials Technology, Council of Scientific & Industrial Research, Bhubaneswar 751013, India |
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| Abstract: | The present investigation examines the viability of dolochar, a sponge iron industry waste material, as a reductant in the reduction roasting of iron ore slimes, which are another waste generated by iron ore beneficiation plants. Under statistically determined optimum con-ditions, which include a temperature of 900°C, a reductant-to-feed mass ratio of 0.35, and a reduction time of 30-45 min, the roasted mass, after being subjected to low-intensity magnetic separation, yielded an iron ore concentrate of approximately 64wt% Fe at a mass recovery of approximately 71% from the feed iron ore slime assaying 56.2wt% Fe. X-ray diffraction analyses indicated that the magnetic products con-tain magnetite and hematite as the major phases, whereas the nonmagnetic fractions contain quartz and hematite. |
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| Keywords: | iron ore slime reduction roasting dolochar reductant magnetic separation |
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