BUDDY EXPLAINER on Instagram: "Credits: Source unknown — DM for credit or removal. The post shows an 11-second clip of a magnetic drum separator pulling magnetite (Fe₃O₄) out of iron-rich black sand. As the green drum spins, powerful internal magnets attract the dark iron particles, forming a brush-like layer on the surface, while the lighter sand drops away. This method works because magnetite has strong ferromagnetic properties, allowing efficient dry separation that can exceed 90% effectivene