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Investigation of transformations of low-grade manganese ore during the roasting process
Cent Met Res & Dev Inst CMRDI, Pyrometallurg Proc Ores Dept, Cairo, Egypt; Cent Met Res & Dev Inst CMRDI, Pyrometallurg Proc Ores Dept, PO Box 87, 1, El-felezat St El-Tebbin, Cairo, Helwan, Egypt.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Mineralteknik och metallurgi. Cent Met Res & Dev Inst CMRDI, Pyrometallurg Proc Ores Dept, Cairo, Egypt.ORCID-id: 0000-0003-3833-0817
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Mineralteknik och metallurgi. Pyrometallurgical Processing of Ores Department, Central Metallurgical Research and Development Institute (CMRDI), Cairo, Egypt.ORCID-id: 0000-0002-2358-7719
2023 (Engelska)Ingår i: Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy, ISSN 2572-6641, E-ISSN 2572-665X, Vol. 132, nr 1, s. 62-72Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The transformations of low-grade manganese ore were investigated during roasting in the air at different temperatures up to 1200 degrees C. The transformations were followed up by XRD and TGA-DTA. Moreover, the morphology and magnetic properties were determined by SEM and VSM. It was observed that MnO2 transformed to the lower oxide Mn5O8 at 500 degrees C and then to bixbyite (Mn2O3) at 600 degrees C. Finally, the bixbyite decomposed to hausmannite (Mn3O4) at 800 degrees C. Increasing the roasting temperature to 900 degrees C induced a reaction between hematite and hausmannite and led to the formation of a small amount of solid solution of the ferrite spinel MnFe2O4. Further increase in temperature to 1000 degrees C led to the formation of a solid solution of braunite (Mn7SiO12) which decomposed to rhodonite (MnSiO3) at 1200 degrees C. The magnetic susceptibility of the original ore gradually increased with the roasting temperature, from 0.119 x 10(-3) at ambient temperature to a maximum value of 80 x 10(-3) at 1200 degrees C.

Ort, förlag, år, upplaga, sidor
Taylor & Francis, 2023. Vol. 132, nr 1, s. 62-72
Nyckelord [en]
Low-grade manganese ore, roasting process, transformations, manganese ferrite, magnetic properties
Nationell ämneskategori
Metallurgi och metalliska material
Forskningsämne
Processmetallurgi
Identifikatorer
URN: urn:nbn:se:ltu:diva-95298DOI: 10.1080/25726641.2022.2161736ISI: 000904693500001Scopus ID: 2-s2.0-85145485625OAI: oai:DiVA.org:ltu-95298DiVA, id: diva2:1733621
Anmärkning

Validerad;2023;Nivå 2;2023-04-18 (joosat);

Tillgänglig från: 2023-02-02 Skapad: 2023-02-02 Senast uppdaterad: 2024-02-14Bibliografiskt granskad

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Elsadek, MohamedAhmed, Hesham

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Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy
Metallurgi och metalliska material

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