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1995•Physical Separation in Science and EngineeringOpen access

Treatment of Red Mud From Alumina Production by High–Intensity Magnetic Separation

Mohamad Fofana, S. Kmeť, Štefan Jakabský, Slavomír Hredzák, Gabriel Kunhalmi

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Abstract

The paper gives attention to the possibilities of magnetic separation of red mud. The red mud can be characterised as an insoluble residue originated during the bayer method application in bauxite processing. Sample of red mud was obtained by leaching of bauxite from the Fria deposit (Guinea). The wet method of high–intensity magnetic separation was applied to the treatment. The magnetic product with the Fe content of 47% and recovery of 85% was obtained under magnetic field induction of 0.06 Tesla. The best results of magnetic separation were achieved by treating the size fraction–125 μm + 90 μm.

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What this paper is about

The paper gives attention to the possibilities of magnetic separation of red mud. The red mud can be characterised as an insoluble residue originated during the bayer method application in bauxite processing. Sample of red mud was obtained by leaching of bauxite from the Fria deposit (Guinea). The wet method of high–intensity magnetic separation was applied to the treatment. The magnetic product with the Fe content of 47% and recovery of 85% was obtained under magnetic field induction of 0.06 Tesla. The best results of magnetic separation were achieved by treating the size fraction–125 μm + 90 μm.

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Available abstract

The paper gives attention to the possibilities of magnetic separation of red mud. The red mud can be characterised as an insoluble residue originated during the bayer method application in bauxite processing. Sample of red mud was obtained by leaching of bauxite from the Fria deposit (Guinea). The wet method of high–intensity magnetic separation was applied to the treatment. The magnetic product with the Fe content of 47% and recovery of 85% was obtained under magnetic field induction of 0.06 Tesla. The best results of magnetic separation were achieved by treating the size fraction–125 μm + 90 μm.

Key concepts: Red mud, Bauxite, Magnetic separation, Metallurgy, Leaching (pedology), Materials science, Bayer process, Mineralogy

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