Characterization of Fluxed Iron Ore Pellets as Compared to Feed Material for Blast Furnace

Arup Kumar Mandal

Arup Kumar Mandal Deptt. of Metallurgical Engineering IIT(BHU), Varanasi Uttar Pradesh India 221005 http://orcid.org/0000-0003-3268-1720

Keywords: Calcium Aluminium silicate, Lime Fluxed pellets, Characterization, Strengthening behavior, Shatter and tumbler test

Abstract

The effect of lime addition in hematite iron ore pelletson its physico-chemical as well as mechanical properties with respect to blast furnace requirement was studied in a laboratory scale with varying basicity i.e. 0-2.0.Increasing addition lime produced more calcium-alumino-silicate phases (slag)asevidenced by SEM-EDAX analysis. These phases have low melting points which enhances sticking behaviourof pellets, as well as imparting strength to the pellets(resulting increasingcompressive strength,tumbler, abrasionand shatter index)anddecreasing the porosity.The low basicity pellets were predominantly oxide-bonded, while high basicity pellets were mostly slag bonded. This means that pellets should be fired at sufficiently high enough temperature to generate liquid phases to get the sufficient strength but not so high as to cause pellets to stick. The properties of fluxed pellets were compared with the properties of iron ore lump and pellets, which are being used in blast furnace for production of iron and steel.

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Author Biography

Arup Kumar Mandal, Deptt. of Metallurgical Engineering IIT(BHU), Varanasi Uttar Pradesh India 221005

Department of Metallurgical Engineering

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