The use of diffuse reflectance spectroscopy for the characterization of iron ores

Costa, Geraldo Magela da; Barrón, Vidal; Ferreira, César Mendonça; Torrent, J.

doi:10.1016/j.mineng.2009.07.003

Cited by 18 publications

(5 citation statements)

References 17 publications

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“…The high content of hematite in this material was also observed by Costa et al 20 , who argued as typical of Brazilian ores composition. The chemical composition is given in Table 1, as obtained by EDX.…”

Section: Iron Ore Fine Characterizationsupporting

confidence: 86%

Photodegradation of UHMWPE Filled with Iron Ore Fine

et al. 2017

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Ultra high molecular weight polyethylene (UHMWPE) is one of the most important engineering materials owing to outstanding properties like impact strength and abrasion resistance. However, the relatively low Young´s modulus restricts some application and the use of fillers may be a suitable way to overcome this. The fillers can influence the photo stabilization of the compound, as it occurs to other polymers. Neat UHMWPE and its composites with 1 and 10% of iron ore fine were exposed to ultraviolet radiation for up to 33 days and then tested for mechanical properties. The stress-strain behaviour changed with degradation, with an evident necking and strain hardening region that was not observed before exposure, due to a reduction in entanglements density. From the tensile results, the filler may have a protection action against UV, particularly when a loading of 10% was present. Complementary analyses were performed, including X-ray diffraction, DSC and SEM.

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Section: Iron Ore Fine Characterizationsupporting

confidence: 86%

Photodegradation of UHMWPE Filled with Iron Ore Fine

et al. 2017

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“…While a minor lepidocrocite signal (1% abundance in the Mö ssbauer spectrum) was observed with 56 hematite rhombohedra the small amount of goethite formed on the 56 hematite needles was not visible in XRD. For similar iron oxide surface investigations in the future, additional techniques such as diffuse reflectance spectroscopy may provide more sensitive identification and quantification of primary and secondary iron oxides, in particular hematite and goethite (da Costa et al, 2009). Acicular shapes (needle-like) similar to goethite were readily apparent on the hexagon surfaces within SEM images (Fig.…”

Section: Hematite and 56 Goethite Substratesmentioning

confidence: 98%

Heterogeneous oxidation of Fe(II) on iron oxides in aqueous systems: Identification and controls of Fe(III) product formation

Larese-Casanova

Kappler

Haderlein

2012

Geochimica et Cosmochimica Acta

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“…At present, various studies are conducted to increase the integrated approach of the use of the raw material base of the Mikhailovskoye deposit in the development of combined technological schemes. − However, detailed systematic work on the study of quality and distribution of valuable components and their impact on beneficiation has not been carried out. The purpose of this work was to find optimal technological solutions to improve the quality of iron ore concentrates in beneficiation of magnetite-hematite ores of the Mikhailovskoye deposit using a comprehensive approach to the study of material, chemical, and phase composition.…”

Section: Introductionmentioning

confidence: 99%

Mineral and Technological Features of Magnetite–Hematite Ores and Their Influence on the Choice of Processing Technology

Николаева

Aleksandrova

Chanturiya³

et al. 2021

ACS Omega

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Analysis of the current technical solutions for the processing of iron ores showed that the high-grade ores are directly exposed to metallurgical processing; by comparison, low-grade ores, depending on the mineralogical and material composition, are directed to beneficiation including gravitational, magnetic, and flotation processes or their combination. Obtaining high-quality concentrates with high iron content and low content of impurities from low-grade iron ores requires the maximum possible liberation of valuable minerals and a high accuracy of separating features (difference in density, magnetic susceptibility, wettability, etc.). Mineralogical studies have established that the main iron-bearing mineral is hematite, which contains 69.02 to 70.35% of iron distributed in the ore. Magnetite and hydrogoethite account for 16.71–17.74 and 8.04–10.50% of the component, respectively; the proportion of iron distributed in gangue minerals and finely dispersed iron hydroxides is very insignificant. Iron is mainly present in the trivalent form—Fe 2 O 3 content ranges from 50.69 to 51.88%; bivalent iron is present in small quantities—the FeO content in the samples ranges from 3.53 to 4.16%. The content of magnetic iron is 11.40–12.67%. Based on the obtained results by the investigation of the features of magnetite–hematite ores from the Mikhailovskoye deposit, a technological scheme of magneto-flotation beneficiation was proposed, which allows producing iron concentrates with 69% of iron content and less than 2.7% silicon dioxide for the production of pellets with subsequent metallization.

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The use of diffuse reflectance spectroscopy for the characterization of iron ores

Cited by 18 publications

References 17 publications

Photodegradation of UHMWPE Filled with Iron Ore Fine

Photodegradation of UHMWPE Filled with Iron Ore Fine

Heterogeneous oxidation of Fe(II) on iron oxides in aqueous systems: Identification and controls of Fe(III) product formation

Mineral and Technological Features of Magnetite–Hematite Ores and Their Influence on the Choice of Processing Technology

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