Elimination of alkalies from iron ore tailings by magnetic separation and flotation

A feasibility study has been undertaken on the use of wet high-intensity magnetic separation and flotation methods for the recovery of low-grade iron ores (siderites) appearing as tailings in dense media concentration processes of siderite iron ores. Two products were examined for this purpose, name...

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Published inSteel times international Vol. 10; no. 2; p. 55
Main Authors Gómez, F A López, García, F Medina, Carcedo, F García, Sierra, J C Ruiz, Frutos, F J García, Barandiarían, J M
Format Journal Article
LanguageEnglish
Published Redhill Quartz Business Media Ltd 01.06.1986
Subjects
Alkalies
Concentrates
Flotation
Iron
Iron ores
Magnetic separation
Steels
Tailings
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Summary:A feasibility study has been undertaken on the use of wet high-intensity magnetic separation and flotation methods for the recovery of low-grade iron ores (siderites) appearing as tailings in dense media concentration processes of siderite iron ores. Two products were examined for this purpose, namely, one, of a rather coarse fraction and the other, of fine grain size regarding their possibilities in the production of iron concentrates having the required properties for their use by the iron and steel industry. From the study carried out it has been inferred that pre-slimming of the product to be sintered is required in both processes in order to obtain high Fe and alkali yields in the concentrates. The tests carried out have shown that both magnetic separation performed at comparatively low magnetic field intensities and flotation, are efficient methods for the recovery of tailings from low grade iron ore by elimination of the alkalies which impurify and penalise metallurgy.
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ISSN:0143-7798