The primary gangue mineral in iron ores is quartz. In addition to quartz, iron-bearing silicates (e.g., amphiboles and pyroxenes), carbonates, clays (e.g., kaolinite), and gibbsite are alsomonly present in iron ores [1,2]. Iron ore beneﬁciation aims to eliminate the harmful elements in iron ore concentrate, which could impose a Jun 04, 2022 · The coneased to 57.36%, with a 73.12% recovery from 45.95% iron ore, and the performance index of the final concentrate was measured by iron grade > 85%, metallization rate > 97%, and iron recovery > 92% [28,29,30]. Researchers have also identified the benefit of pre-oxidation of the low-grade iron ore at 750 metals Article Assessment of Silica Recovery from Metallurgical Mining Waste, by Means of Column Flotation Eleazar Salinas-Rodriguez 1 , Javier Flores-Badillo 1 , Juan Herdez-Avila 1, * , Eduardo Cerecedo-Saenz 1, * , Ma. del Pilar Gutierrez-Amador 2 , Ricardo I. Jeldres 3 and Normam Toro 4,5 1 Area Academica de Ciencias de la Tierra y Materiales, Universidad The muffle furnace reduction was found useful for the separation of iron-bearing phases from the quartz impurities and concentrate with iron purity of ~ 64%, recovery of 98%, and a yield of 84.5% is achieved at 900 °C, 9% charcoal in 1 h.