Development of innovation routes for iron ore using high intensity magnetic separators.
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2022
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The mineral processing of low-grade iron ores commonly generates large vol-
umes of slime, which are disposed as tailings. Modern mining requires strives to elimi-
nate the use of tailings dams in a maximum effort to increase metallurgical recovery,
the security and reduction of the operational cost. This research aims for the recovery
of iron contained in the slime, which consists of a material with 38% Fe and <40 μm,
originating from the desliming cyclones. Pilot tests were performed on the Wet High-
Intensity Magnetic Separator (WHIMS) and on the Vertical Ring Pulsating High Gra-
dient Magnetic Separator (VPHGMS) considering different configurations in terms of
operating parameters and routes. The best results were obtained for VPHGMS with
an iron content in the concentrate of 67.06% and mass and metallurgical recovery of
32.42% and 56.86%, respectively. In the best condition tested, around 540 thou-
sand tons of concentrate can be incorporated into production and has great envi-
ronmental relevance.
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Slime ultrafines, Dispersion, Processing routes
Citação
MENEZES, K. B. et al. Development of innovation routes for iron ore using high intensity magnetic separators. REM - International Engineering Journal, Ouro Preto, v. 75, p. 167-175, abr./jun. 2022. Disponível em: <https://www.scielo.br/j/remi/a/dKw8YsrpY3NMXwBrt7K5hZg/>. Acesso em: 29 abr. 2022.