Processing complex Egyptian banded iron formation: Geological challenges, experimental approaches, and sustainable innovations

Iron is crucial for industry and the global economy, essential for construction, transport, and manufacturing. However, extracting iron from complex ores, such as those in Um Nar BIF, is challenging due to the interlocking of iron with silica and other minerals, making conventional beneficiation inefficient. This study investigates upgrading Um Nar Banded Iron Formation (BIF) using the Falcon SB-40 concentrator. The Box-Behnken Design (BBD) optimized conditions: g-force of 60, water pressure of 7 psi, and feed rate of 25 g/min, achieving 61.3% Fe grade, 59.29% Fe recovery, and 8.28% SiO 2 grade. Given the limits of gravity separation, reduction roasting with biomass sawdust was explored, enhancing results to 59.55% Fe grade, 78% Fe recovery, and 5% SiO 2 . This research highlights that reduction roasting offers a more effective strategy for processing complex iron ores, contributing valuable insights to the field of mineral processing and sustainable extraction technologies.