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Fraser's air-sand process

A dense-media process in which a dry, specific-gravity separation of coal from refuse is achieved by utilizing a flowing dense medium intermediate in density between coal and refuse. The dense medium is formed by bubbling air through a mass of dry sand, 30 to 80 mesh in size. The air dilates and fluidizes the sand mass, causing it to behave 1281 somewhat as a heavy liquid. The coal floats on the aerated sand mass and the refuse sinks.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 puntos
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