The best method to be used to separate the iron fillings from the carbon powder is through the use of water.
The separation of carbon powder and iron fillings in powdered form can be achieved in a blast furnace flue dust. The blast furnace flue dust is usually combined with water to create a slurry that contains (50-70)% solids.
The slurry is fortified with a flotation agent as well as a frothing agent. The content in the slurry is stirred rapidly to cover the carbon particles completely with the flotation agent.
The carbon powdered particles float on top of the slurry, while the iron fillings are collected as a sink product.
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