Process oriented characterisation of oolitic iron concentrate during dephosphorisation by roasting and leaching

Ionkov, Krassimir; Gomes, Otavio; Neumann, Reiner; Gaydardzhiev, Stoyan; Corea de Araujio, Armando

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Process oriented characterisation of oolitic iron concentrate during dephosphorisation by roasting and leaching

Ionkov, Krassimir; Gomes, Otavio; Neumann, Reiner et al.

2016 • In Proceedings of the XXVIII International Mineral Processing Congress (IMPC 2016)

Peer reviewed

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Keywords :

iron ore; phosphorous removal; characterisation

Abstract :

[en] Phosphorus in iron ores is considered as a deleterious component to iron making reflecting in cold shortness of the produced steel. The present study investigates the phosphorus migration pattern resulting from thermal treatment of an oolitic-type iron concentrate with and without additives. To this end focused mineralogical and microscopic observations were performed. The results have shown that roasting with alkaline additive drives phosphorus outside the hematite hosting mineral, however it remains evenly distributed inside the volume of the oolites. It penetrates inside the newly formed cementing phases of Al-Na-Si-Fe-type and also fills the interstices between the crystals. Other than phosphorus, aluminum, calcium and iron tend also to migrate towards the amorphous-type cementing phase. Finally, the possibilities for P removal by means of magnetic separation and acid leaching of the roasted concentrate were evaluated. The obtained final product presents a standard iron concentrate suitable for steelmaking with its phosphorous being dropped from 0.71% to 0.05% and iron grade of a nearly 66% being reached.

Disciplines :

Geological, petroleum & mining engineering

Author, co-author :

Ionkov, Krassimir

Gomes, Otavio; CETEM

Neumann, Reiner; CETEM - Centre for Mineral Technology

Gaydardzhiev, Stoyan ; Université de Liège > Département ArGEnCo > Traitement et recyclage des matières minérales

Corea de Araujio, Armando

Language :

English

Title :

Process oriented characterisation of oolitic iron concentrate during dephosphorisation by roasting and leaching

Publication date :

September 2016

Event name :

28 International Mineral Processing Congress

Event organizer :

The Canadian Institute of Mining, Metallurgy and Petroleum

Event place :

Quebec City, Canada

Event date :

10 - 15 September 2016

Audience :

International

Main work title :

Proceedings of the XXVIII International Mineral Processing Congress (IMPC 2016)

Publisher :

The Canadian Institute of Mining, Metallurgy and Petroleum, West Westmount, Canada

ISBN/EAN :

978-1-926872-29-2

Peer reviewed :

Peer reviewed

Available on ORBi :

since 10 October 2016

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