Sponge Iron Concentrate for Egyptian Ele

This study presents a combined flowsheet utilizing high intensity magnetic separation and flotation for the preparation of supergrade concentrates suitable for sponge iron production in Egyptian electric steel making. The primary objective was to achieve a high-grade concentrate from El-Geddida iron ore, characterized by 90.55% Fe and 11.85% insolubles, through fine grinding and appropriate beneficiation techniques. Methodologically, dry magnetic separation was conducted under varying feeding rates, belt speeds, and magnetic field intensities, revealing a trade-off between machine capacity and concentrate grade. A satisfactory rougher concentrate was obtained with a modest feed layer. Subsequent cleaning operations were assessed, yielding a standard concentrate of 57.8% Fe via single particle-layer feeding. The study also examined reverse cationic flotation's feasibility for magnetic concentrate enhancement, employing a selective collector and unique scrubbing conditions. Optimal flotation conditions led to a final superconcentrate of 60.72% Fe with an iron recovery of approximately 94%. Comparative analysis indicated that the proposed flowsheet is more effective than traditional magnetic roasting-flotation methods for producing superconcentrates, thus facilitating the development of electric steel making in Egypt.