Froth flotation uses chemicals and bubbles to pull out specific minerals, while magnetic separation uses a strong magnet to pick out iron-rich bits. For a small man like me, the magnet wins every time—no costly chemicals, no worrying about the water pH, just a steady pull. I've seen two neighbours lose their shirts trying to run a flotation cell on borrowed money. My old hand-cranked magnet, meanwhile, still quietly pulls enough black sand from my tailings to pay for my daughter's books each term.
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