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Publikasjoner (5 av 5) Visa alla publikasjoner
Elsadek, M., Mousa, E. & Ahmed, H. (2024). Green approach to ironmaking: Briquetting and hydrogen reduction of mill scale using novel binders. International journal of hydrogen energy, 62, 732-738
Åpne denne publikasjonen i ny fane eller vindu >>Green approach to ironmaking: Briquetting and hydrogen reduction of mill scale using novel binders
2024 (engelsk)Inngår i: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 62, s. 732-738Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The most prominent solutions are the establishment of a circular economy by recirculating the iron-rich residues from steelworks and the adoption of hydrogen as a clean reducing agent to mitigate fossil CO2 emission. One such residue is mill scale, which is generated during steelmaking, casting, and rolling processes. However, the fine particles and easy reoxidation of the mill scale make it difficult to be used directly in iron and steel production without proper compaction. This paper aims to demonstrate the feasibility of mill scale briquetting using organic binders to meet the requirements of hydrogen-based direct reduction. The study will investigate the influence of binder type, binder dosage, moisture content, and compaction pressure on the briquetting process and the briquettes quality. Moreover, the reducibility of optimized briquettes will be examined by hydrogen at 900 °C using a thermogravimetric analyzer coupled with a quadrupole mass spectroscopy (TGA-QMS). The optimal combination for achieving the best mechanical strength and reducibility was a briquette produced with 1% Alcotac® CB6, 1% KemPel, and 2.5% moisture content, compressed at a pressure of 125 kN.

sted, utgiver, år, opplag, sider
Elsevier Ltd, 2024
Emneord
Briquetting, Circular economy, Green transition, Hydrogen reduction, Ironmaking, Mill scale, Organic binders
HSV kategori
Forskningsprogram
Processmetallurgi
Identifikatorer
urn:nbn:se:ltu:diva-104890 (URN)10.1016/j.ijhydene.2024.03.152 (DOI)2-s2.0-85187792388 (Scopus ID)
Merknad

Validerad;2024;Nivå 2;2024-04-05 (marisr);

Full text license: CC BY

Tilgjengelig fra: 2024-03-26 Laget: 2024-03-26 Sist oppdatert: 2024-04-05bibliografisk kontrollert
Parathodiel, H., Mousa, E., Ahmed, H., Elsadek, M., Forsberg, K. & Andersson, C. (2023). Developing Iron Ore Pellets Using Novel Binders for H2-Based Direct Reduction. Sustainability, 15(14), Article ID 11415.
Åpne denne publikasjonen i ny fane eller vindu >>Developing Iron Ore Pellets Using Novel Binders for H2-Based Direct Reduction
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2023 (engelsk)Inngår i: Sustainability, E-ISSN 2071-1050, Vol. 15, nr 14, artikkel-id 11415Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The transformation from traditional iron- and steelmaking technologies to green H2-based new technologies will require an improvement in the quality and purity of iron ore burden materials. Iron ore pellets are essential inputs for producing direct reduced iron (DRI), but the conventional binders, used in iron ore pelletizing, introduce gangue oxides to the DRI and consequently increase the slag generation and energy consumption in the steelmaking unit. Partial and/or full replacement of the traditional binders with novel organic binders would significantly contribute to improving the process efficiency, particularly in the next-generation H2-based direct reduction technology. This study illustrates the feasibility of pelletizing magnetite iron ore concentrate using four organic binders: KemPel, Alcotac CS, Alcotac FE16, and CMC, in comparison to bentonite as a reference. The study explores the influence of binder type, binder dosage, and moisture content on the characteristics and properties of the pellets. The efficiency of binders was characterized by the moisture content, drop number test, cold compression strength, and H2 reduction of pellets. For dry pellets, CMS was superior among other binders including bentonite in developing dry strength. After firing, the pellets produced by the partial replacement of bentonite with 0.1 wt.% KemPel demonstrate a performance nearly identical to the reference pellets. While the complete replacement of bentonite with organic binder shows a lower performance of fired pellets compared to the reference, it may still be suitable for use in DR shaft furnaces. The cold-bonded pellets demonstrate a superior reduction rate compared to fired pellets.

sted, utgiver, år, opplag, sider
Multidisciplinary Digital Publishing Institute (MDPI), 2023
Emneord
agglomeration, CO2 emission, direct reduction, H2, magnetite concentrate, organic binders, pelletizing, strength
HSV kategori
Forskningsprogram
Processmetallurgi
Identifikatorer
urn:nbn:se:ltu:diva-99544 (URN)10.3390/su151411415 (DOI)001071292700001 ()2-s2.0-85166242515 (Scopus ID)
Forskningsfinansiär
Swedish Research Council Formas, InnoAgglo project, 2020-02089
Merknad

Validerad;2023;Nivå 2;2023-08-14 (joosat);

Licens fulltext: CC BY License

Tilgjengelig fra: 2023-08-14 Laget: 2023-08-14 Sist oppdatert: 2024-03-07bibliografisk kontrollert
Ali, H., Elsadek, M. & Ahmed, H. (2023). Investigation of transformations of low-grade manganese ore during the roasting process. Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy, 132(1), 62-72
Åpne denne publikasjonen i ny fane eller vindu >>Investigation of transformations of low-grade manganese ore during the roasting process
2023 (engelsk)Inngår 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. 62-72Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
Taylor & Francis, 2023
Emneord
Low-grade manganese ore, roasting process, transformations, manganese ferrite, magnetic properties
HSV kategori
Forskningsprogram
Processmetallurgi
Identifikatorer
urn:nbn:se:ltu:diva-95298 (URN)10.1080/25726641.2022.2161736 (DOI)000904693500001 ()2-s2.0-85145485625 (Scopus ID)
Merknad

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

Tilgjengelig fra: 2023-02-02 Laget: 2023-02-02 Sist oppdatert: 2024-02-14bibliografisk kontrollert
Manu, K., Mousa, E., Ahmed, H., Elsadek, M. & Yang, W. (2023). Maximizing the Recycling of Iron Ore Pellets Fines Using Innovative Organic Binders. Materials, 16(10), Article ID 3888.
Åpne denne publikasjonen i ny fane eller vindu >>Maximizing the Recycling of Iron Ore Pellets Fines Using Innovative Organic Binders
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2023 (engelsk)Inngår i: Materials, E-ISSN 1996-1944, Vol. 16, nr 10, artikkel-id 3888Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This research work focuses on the practicality of using organic binders for the briquetting of pellet fines. The developed briquettes were evaluated in terms of mechanical strength and reduction behavior with hydrogen. A hydraulic compression testing machine and thermogravimetric analysis were incorporated into this work to investigate the mechanical strength and reduction behavior of the produced briquettes. Six organic binders, namely Kempel, lignin, starch, lignosulfonate, Alcotac CB6, and Alcotac FE14, in addition to sodium silicate, were tested for the briquetting of pellet fines. The highest mechanical strength was achieved using sodium silicate, Kempel, CB6, and lignosulfonate. The best combination of binder to attain the required mechanical strength even after 100% reduction was found to be a combination of 1.5 wt.% of organic binder (either CB6 or Kempel) with 0.5 wt.% of inorganic binder (sodium silicate). Upscaling using an extruder gave propitious results in the reduction behavior, as the produced briquettes were highly porous and attained pre-requisite mechanical strength.

sted, utgiver, år, opplag, sider
MDPI, 2023
Emneord
agglomeration, pellet fines, organic binders, briquettes, reduction, green steel
HSV kategori
Forskningsprogram
Processmetallurgi
Identifikatorer
urn:nbn:se:ltu:diva-98285 (URN)10.3390/ma16103888 (DOI)000997006800001 ()37241517 (PubMedID)2-s2.0-85160659088 (Scopus ID)
Forskningsfinansiär
Swedish Research Council Formas, 2020-02089
Merknad

Validerad;2023;Nivå 2;2023-06-13 (joosat);

Licens fulltext: CC BY License

Part of Special Issue: Advances in Mineral Processing, Waste Recycling and Extractive Metallurgy

Tilgjengelig fra: 2023-06-13 Laget: 2023-06-13 Sist oppdatert: 2024-02-14bibliografisk kontrollert
Elsadek, M., Ahmed, H., Suup, M., Sand, A., Heikkinen, E., Khoshkhoo, M. & Sundqvist-Öqvist, L. (2023). Recycling of pyrite and gypsum mining residues through thermochemical conversion into valuable products. Resources, Conservation and Recycling, 199, Article ID 107219.
Åpne denne publikasjonen i ny fane eller vindu >>Recycling of pyrite and gypsum mining residues through thermochemical conversion into valuable products
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2023 (engelsk)Inngår i: Resources, Conservation and Recycling, ISSN 0921-3449, E-ISSN 1879-0658, Vol. 199, artikkel-id 107219Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
Elsevier, 2023
HSV kategori
Forskningsprogram
Processmetallurgi
Identifikatorer
urn:nbn:se:ltu:diva-101825 (URN)10.1016/j.resconrec.2023.107219 (DOI)001159422000001 ()2-s2.0-85174184746 (Scopus ID)
Forskningsfinansiär
VinnovaSwedish Research Council FormasSwedish Energy Agency
Merknad

Validerad;2023;Nivå 2;2023-10-30 (hanlid);

Funder: CAMM2 (Center for advanced mining & metallurgy), Luleå University of Technology

Tilgjengelig fra: 2023-10-30 Laget: 2023-10-30 Sist oppdatert: 2024-03-07bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0003-3833-0817