Hydrometallurgical Processing of Brazilian Iron Ore Tailings for the Synthesis of Pigments

Almeida, Vítor Otacílio de; Schneider, Ivo

doi:10.4236/gm.2022.122003

Cited by 6 publications

(1 citation statement)

References 14 publications

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“…The constant increase in iron-containing waste reserves and the reduction in natural ore reserves indicates the need to process tailings and other mineral wastes. Currently, there are several different ways to utilize tailings, including iron recovery [4][5][6][7], production of building materials [8][9][10] and glass ceramics [11], yellow-red pigment manufacture [12,13], and magnetic nanoparticle production [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Mineral Magnetic Modification of Fine Iron Ore Tailings and Their Beneficiation in Alternating Magnetic Fields

Dudchenko,

Ponomar,

Ovsiienko

et al. 2023

Metals

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In this paper, the properties, mineral magnetic modification, and beneficiation of tailings from the central mining and processing plant in Kryvyi Rih, Ukraine, have been studied. Samples were investigated by X-ray diffraction, X-ray fluorescence, microscopy, and magnetization measurements. The beneficiation was conducted using magnetizing roasting with carbon monoxide followed by dry low-intensity magnetic separation. The effects of chemical, mineral, and granulometric composition on the processing of fine tailings of different sizes sampled at different points of the tailings pond were investigated. Additionally, we proposed a new approach for magnetic separation of fine magnetically modified tailings based on the combination of permanent and alternating magnetic fields. Magnetizing roasting resulted in an enhancement in mass magnetization to 11–62 Am2/kg in comparison with initial values of 0.3–1.5 Am2/kg. After magnetic separation, the magnetic concentrates consisted almost completely of magnetite (with the magnetization of 75–88 Am2/kg) and non-magnetic residues contained major quartz. The content of iron in magnetic concentrates reached 68.5–70.2 wt.% and iron recovery 77–96 wt.%, depending on size fraction. We could conclude that the tailings are represented by fine-grained liberated material that can be effectively upgraded using magnetizing roasting and magnetic separation into two valuable products, such as iron concentrate and quartz powder.

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