Dolochar as a reductant in the reduction roasting of iron ore slimes

Swagat S. Rath; Danda Srinivas Rao

doi:10.1007/s12613-017-1526-y

Volume 24 Issue 12

Dec. 2017

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2017 > 24(12): 1341-1351

Swagat S. Rathand Danda Srinivas Rao, Dolochar as a reductant in the reduction roasting of iron ore slimes, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1341-1351. https://doi.org/10.1007/s12613-017-1526-y

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Swagat S. Rathand Danda Srinivas Rao, Dolochar as a reductant in the reduction roasting of iron ore slimes, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1341-1351. https://doi.org/10.1007/s12613-017-1526-y

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Research Article

Dolochar as a reductant in the reduction roasting of iron ore slimes

Swagat S. Rath and
Danda Srinivas Rao

+ Author Affiliations

Corresponding author:
Swagat S. Rath E-mail: ssrath@immt.res.in
Received: 20 March 2017; Revised: 25 April 2017; Accepted: 3 May 2017

Abstract

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 conditions, which include a temperature of 900℃, 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 contain magnetite and hematite as the major phases, whereas the nonmagnetic fractions contain quartz and hematite.
- iron ore slime;
- reduction roasting;
- dolochar;
- reductant;
- magnetic separation

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References

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