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Title of Journal: Int J Miner Metall Mater

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Abbravation: International Journal of Minerals, Metallurgy, and Materials

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Publisher

University of Science and Technology Beijing

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DOI

10.1016/j.amepre.2015.09.033

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ISSN

1869-103X

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Characterization of dolochar wastes generated by t

Authors: Ranjan Kumar Dwari Danda Srinivas Rao Akhila Kumar Swar Palli Sita Ram Reddy Barada Kanta Mishra
Publish Date: 2012/11/14
Volume: 19, Issue: 11, Pages: 992-1003
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Abstract

Solid wastes generated by the metallurgical industry contribute significantly towards the enhancement of environmental pollution The handling utilization and safe disposal of these solid wastes are major concerns for the world Dolochar is such a solid waste generated by the sponge iron industry Investigations were carried out on the physical mineralogical and chemical characteristics for the efficient utilization of dolochar The detailed studies on physicochemical properties and petrography were carried out by optical microscopy Xray diffraction XRD and scanning electron microscopy SEM Characterization studies revealed that the dolochar consists of quartz free as well as locked free lime Fe particles and Ca or Mg and/or Ca+Mg+Fe oxide phases The washability data of −300 μm dolochar samples indicated that clean coal with 41wt ash at 18 yield can be produced from dolochar with 78wt ash The studies further suggested that the liberation of the dolochar is hard to achieve for clear separation The dolochar is observed to have high ash fusion temperature and the unburned carbon can be best utilized for power generation

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