The effect of heat treatment on the magnetic properties of pyrite

KE Waters; Neil Rowson; Richard Greenwood; Andrew Williams

doi:10.1016/j.mineng.2008.01.008

The effect of heat treatment on the magnetic properties of pyrite

KE Waters, Neil Rowson, Richard Greenwood, Andrew Williams

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Abstract

The effect of thermal treatment on the magnetic properties of pyrite was investigated. Untreated pyrite showed evidence of both Paramagnetic and ferromagnetic components. After heat treatment, the saturation magnetisation increased considerably until 800 degrees C when the magnetisation decreased, and then increased again after 900 degrees C. These changes are due to phase changes induced by oxidation. The wet magnetic recovery of the untreated sample was 25%, which increased to over 90% after treatment at 500 degrees C. The recovery of the magnetic fraction plateaus after treatment at higher temperatures, implying that a sample magnetisation greater than 5 kA m(-1) leads to a recovery greater than 90% for this size fraction. (C) 2008 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	679-682
Number of pages	4
Journal	Minerals Engineering
Volume	21
Issue number	9
DOIs	https://doi.org/10.1016/j.mineng.2008.01.008
Publication status	Published - 1 Jan 2008

Keywords

magnetic separation

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10.1016/j.mineng.2008.01.008

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title = "The effect of heat treatment on the magnetic properties of pyrite",

abstract = "The effect of thermal treatment on the magnetic properties of pyrite was investigated. Untreated pyrite showed evidence of both Paramagnetic and ferromagnetic components. After heat treatment, the saturation magnetisation increased considerably until 800 degrees C when the magnetisation decreased, and then increased again after 900 degrees C. These changes are due to phase changes induced by oxidation. The wet magnetic recovery of the untreated sample was 25%, which increased to over 90% after treatment at 500 degrees C. The recovery of the magnetic fraction plateaus after treatment at higher temperatures, implying that a sample magnetisation greater than 5 kA m(-1) leads to a recovery greater than 90% for this size fraction. (C) 2008 Elsevier Ltd. All rights reserved.",

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T1 - The effect of heat treatment on the magnetic properties of pyrite

AU - Waters, KE

AU - Rowson, Neil

AU - Greenwood, Richard

AU - Williams, Andrew

PY - 2008/1/1

Y1 - 2008/1/1

N2 - The effect of thermal treatment on the magnetic properties of pyrite was investigated. Untreated pyrite showed evidence of both Paramagnetic and ferromagnetic components. After heat treatment, the saturation magnetisation increased considerably until 800 degrees C when the magnetisation decreased, and then increased again after 900 degrees C. These changes are due to phase changes induced by oxidation. The wet magnetic recovery of the untreated sample was 25%, which increased to over 90% after treatment at 500 degrees C. The recovery of the magnetic fraction plateaus after treatment at higher temperatures, implying that a sample magnetisation greater than 5 kA m(-1) leads to a recovery greater than 90% for this size fraction. (C) 2008 Elsevier Ltd. All rights reserved.

AB - The effect of thermal treatment on the magnetic properties of pyrite was investigated. Untreated pyrite showed evidence of both Paramagnetic and ferromagnetic components. After heat treatment, the saturation magnetisation increased considerably until 800 degrees C when the magnetisation decreased, and then increased again after 900 degrees C. These changes are due to phase changes induced by oxidation. The wet magnetic recovery of the untreated sample was 25%, which increased to over 90% after treatment at 500 degrees C. The recovery of the magnetic fraction plateaus after treatment at higher temperatures, implying that a sample magnetisation greater than 5 kA m(-1) leads to a recovery greater than 90% for this size fraction. (C) 2008 Elsevier Ltd. All rights reserved.

KW - magnetic separation

U2 - 10.1016/j.mineng.2008.01.008

DO - 10.1016/j.mineng.2008.01.008

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VL - 21

SP - 679

EP - 682

JO - Minerals Engineering

JF - Minerals Engineering

IS - 9

ER -

The effect of heat treatment on the magnetic properties of pyrite

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Keywords

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