Magnetic Density Separation Gets a Map of Where It Actually Works

Magnetic Density Separation Gets a Map of Where It Actually Works

Magnetic density separation has long promised a cleaner way to sort crushed waste and ores: instead of relying on chemicals or exhaustive grinding, particles are dropped into a magnetic liquid whose effective density changes from place to place under a magnetic field, letting each particle settle where its own density matches the liquid around it. A new study published in Results in Engineering tackles a deceptively simple question that has held…