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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International Journal of Minerals, Metallurgy and Materials > 2017 > 24(12): 1341-1351. > DOI: 10.1007/s12613-017-1526-y

Swagat S. Rath, and 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://dx.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 Affilications

Institute of Minerals and Materials Technology, Council of Scientific & Industrial Research, Bhubaneswar 751013, India

Funds:

The authors are thankful to the Director, Institute of Minerals and Materials Technology, Council of Scientific & Industrial Research, Bhubaneswar, for his kind consent to publish this paper. They also acknowledge the support received from Dr. D. Satapathy for the proximate analysis of dolochar and Ms. Swagatika Mohanty for the XRD studies.

Received: 19 March 2017; Revised: 24 April 2017; Accepted: 02 May 2017;

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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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