RECOVERY of IRON and PHOSPHORUS REMOVAL from GARA DJEBILET IRON ORE (ALGERIA)
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Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Natsional'nyi Hirnychyi Universytet
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Purpose. This research aims to promote the assay of iron and reduce the phosphorus grade of the final DRI. Methodology. A highphosphorus oolitic iron ore from Gara Djebilet deposit underwent the procedure of coalbased direct reduction (coalbased DR) followed by wet lowintensity 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 FeP separation during the coalbased DR of Gara Djebilet mixed pellets. Originality. Using additives of CaO and sodium sulfate during the coalbased DRmagnetic 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 orecoalCaO mixed pellets were reduced in the presence of 5 wt% Na2SO4 at 1250 °C for 30 min. Thus, the coalbased DR could be used as an alternative to the blast furnace (BF) route in the steelmaking industry from refractory iron ores. © Mansour F.A., OuldHamou M., Merchichi A., Güven O., 2021
Açıklama
Anahtar Kelimeler
Coal-based direct reduction, Gara Djebilet, High-phosphorus oolitic iron ore, Magnetic separation, Sodium sulfate
Kaynak
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu
WoS Q Değeri
Scopus Q Değeri
Q3
Cilt
2021
Sayı
4
