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Recovery of iron and phosphorus removal from Gara Djebilet iron ore (Algeria)

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Category: Content №4 2021

Last Updated on 23 August 2021

Published on 30 November -0001

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Authors:

F.A.Mansour, orcid.org/0000-0002-6694-2725, Laboratoire de Gnie Minier, Dpartement Gnie Minier, Ecole Nationale Polytechnique, El Harrach Algiers, Algeria e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

M.Ould-Hamou, orcid.org/0000-0002-8770-5323, Laboratoire de Gnie Minier, Dpartement Gnie Minier, Ecole Nationale Polytechnique, El Harrach Algiers, Algeria e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

A.Merchichi, orcid.org/0000-0001-8136-601X, Laboratoire de Gnie Minier, Dpartement Gnie Minier, Ecole Nationale Polytechnique, El Harrach Algiers, Algeria e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

O.Gven, orcid.org/0000-0002-5267-9153, Department of Mining Engineering, Faculty of Engineering, Adana Alparslan Trke Science and Technology University, Saram Adana, Turkey, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2021, (4): 082 - 088

https://doi.org/10.33271/nvngu/2021-4/082

Abstract:

Purpose. This research aims to promote the assay of iron and reduce the phosphorus grade of the final DRI.

Methodology. A high-phosphorus oolitic iron ore from Gara Djebilet deposit underwent the procedure of coal-based direct reduction (coal-based DR) followed by wet low-intensity magnetic separation (WLIMS). The effects of temperature, periods of time and Na₂SO₄ dosage on phosphorus removal, metallisation degree and iron recovery rate were tried and optimised. Furthermore, phase changes in iron oxides and the distributing features of phosphorus in both reduced and magnetic materials were investigated as well.

Findings. The appropriate addition of sodium sulfate improves the Fe-P separation during the coal-based DR of Gara Djebilet mixed pellets.

Originality. Using additives of CaO and sodium sulfate during the coal-based DR-magnetic separation of mixed pellets sourced from Gara Djebilet deposit.

Practical value. The results reveal that a final direct reduced powder (DRI) assaying 96 wt% Fe and 0.16 wt% P at a recovery rate of 97.72% was obtained when the ore-coal-CaO mixed pellets were reduced in the presence of 5 wt% Na₂SO₄ at 1250 C for 30 min. Thus, the coal-based DR could be used as an alternative to the blast furnace (BF) route in the steelmaking industry from refractory iron ores.

Keywords: Gara Djebilet, high-phosphorus oolitic iron ore, coal-based direct reduction, sodium sulfate, magnetic separation

References.

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