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Effect of reduction roasting by using bio-char derived from empty fruit bunch on the magnetic properties of Malaysian iron ore

Purwanto, Hadi and Mohd. Salleh, Hamzah and Ani, Mohd Hanafi and Yunus, Nurul Azhani and Zamani Abd Rashid, Rusila and Tomohiro, Akiyama and Othman, Nur Ezzah Faezah (2014) Effect of reduction roasting by using bio-char derived from empty fruit bunch on the magnetic properties of Malaysian iron ore. International Journal of Mineral, Metallurgy and Minerals, 21 (4). pp. 326-330. ISSN 1674-4799

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Abstract

Beneficiation of Malaysian iron ore is becoming necessary as iron resources are depleting. However, the upgrading process is challenging because of the weak magnetic properties of Malaysian iron ore. In this study, bio-char derived from oil palm empty fruit bunch (EFB) was utilized as an energy source for reduction roasting. Mixtures of Malaysian iron ore and the bio-char were pressed into briquettes and subjected to reduction roasting processes at 873–1173 K. The extent of reduction was estimated on the basis of mass loss, and the magnetization of samples was measured using a vibrating sample magnetometer (VSM). When reduced at 873 K, the original goethite-rich ore was converted into hematite. An increase in temperature to 1073 K caused a significant conversion of hematite into magnetite and enhanced the magnetic ceptibility and saturation magnetization of samples. The magnetic properties diminished at 1173 K as the iron ore was partially reduced to wustite. This reduction roasting by using the bio-char can assist in upgrading the iron ore by improving its magnetic properties.

Item Type: Article (Journal)
Additional Information: 5804/36378
Uncontrolled Keywords: iron ores; ore reduction; ore roasting; bio-char; magnetic properties
Subjects: T Technology > TN Mining engineering. Metallurgy > TN600 Metallurgy
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Hadi Purwanto
Date Deposited: 18 Apr 2014 09:36
Last Modified: 19 Sep 2017 10:50
URI: http://irep.iium.edu.my/id/eprint/36378

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