Magnetic separation method for iron carbide
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United States of America Patent
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Jan 12, 1999
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N/A
app pub date -
Jan 20, 1998
filing date -
May 4, 1995
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Expired
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Abstract
A method for purifying iron carbide begins by feeding ore to a reaction chamber. A mixture of iron, iron oxides, gangue, and iron carbides is extracted from the reaction chamber. The temperature of the mixture is then adjusted to a range of 400.degree.-500.degree. C. The mixture, at the adjusted temperature, is subjecting to a first magnetic field for separating the mixture into a magnetic fraction including iron and iron oxides from a non-magnetic fraction including gangue and iron carbides. This is followed by a cooling of the non-magnetic fraction of gangue and iron carbides below the Curie temperature of iron carbide. The gangue and iron carbides are subjecting to a second magnetic field for separating the iron carbides, that become magnetic, from the gangue that remains non-magnetic.
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