Quantitative phase analysis of iron ore concentrates

Costa, Geraldo Magela da; Resende, Valdirene Gonzaga de; Toríbio, N. M.

doi:10.1590/s0370-44672002000400006

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…In addition, the structural parameters for martite and specularite are identical, which precludes their discrimination. In spite of these shortcomings, XRD research work on some preliminarily well-characterized iron-ore samples revealed that magnetite, goethite, martite and specularite can be effectively quantified by combining the results of chemical and X-ray diffraction analyses (da Costa et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

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

Costa¹,

Barrón²,

Ferreira³

et al. 2009

Minerals Engineering

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Section: Introductionmentioning

confidence: 99%

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

Costa¹,

Barrón²,

Ferreira³

et al. 2009

Minerals Engineering

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“…X‐ray powder diffraction methods are routinely applied to iron ores . Thereby, not only the real compounds of the iron ores but also anions and cations can be identified if they are in crystalline form.…”

Section: Resultsmentioning

confidence: 99%

“…Quantitative phase analysis using XRD X-ray powder diffraction methods are routinely applied to iron ores. [17,26,27] Thereby, not only the real compounds of the iron ores but also anions and cations can be identified if they are in crystalline form. These give further information about the chemical reactions taking place in the iron ore deposits.…”

Section: Quantitative Analysis Of Iron Ores Using Wdxrfmentioning

confidence: 99%

Utilization of standardless analysis algorithms using WDXRF and XRD for Egyptian iron ore identification

2012

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On the basis of fundamental parameter approaches, the validity of standardless wavelength dispersive X‐ray fluorescence (WDXRF) and X‐ray powder diffraction algorithms was confirmed for analyzing Egyptian iron ore samples collected from two different locations, Aswan and Baharyia. The studied Egyptian iron ores represent different depositional environments and consequently exhibit variable mineralogical and chemical compositions. In the case of WDXRF analysis, the ground powders of iron ore samples were mixed and pressed with low contamination binder in a mass ratio of wax: sample = 4: 0.9 g at 120 kN cm−2. A standardless method for quantitative WDXRF was employed, which requires accurate determination of the amount of organic material in the sample. On the basis of differential thermal analysis, a new method is introduced for the determination of loss of ignition. With the application of the proposed method and standardless quantitative analysis, results for 12 elements in iron ores were obtained: Fe, Mn, Mg, Si, Al, Ca, Na, K, S, Ba, Zn, and Cl. The reliability and precision of the adopted procedure were tested against a standard reference material ‘Iron ore concentrate (SRM 690, NIST, USA)’. The quantitative analysis results of the certified reference material were found acceptable. Depending on the WDXRF results, the powder samples were directly introduced to X‐ray powder diffraction goniometry, and the phase compositions were quantitatively determined by using a standardless analysis program based on Rietveld method. The main phases of all iron ore samples are the hematite and goethite, whereas other phases are found with varying ratios, namely quartz, nordstrandite, rhodochrosite, kaolinite, todorokit, bassanit, andydrite, and hydroxyapatite. Copyright © 2012 John Wiley & Sons, Ltd.

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“…Uma das desvantagens da microscopia ótica é o efeito estereológico. A quantificação mineralógica é realizada em um plano bidimensional, para a conversão em percentagens volumétricas necessita-se das densidades teóricas de cada mineral, que, por exemplo para martita, não é conhecida [5]. A caracterização mineralógica pelo QEMSCAN permite a identificação mais precisa de minerais contaminantes, que é de extrema importância para o processo de beneficiamento de minérios.…”

Section: Agradecimentosunclassified

Técnicas De Microscopia Ótica E Microscopia Eletrônica De Varredura Automatizada (Qemscan) Aplicadas a Diferentes Tipologias De Minério De Ferro

Gonçalves¹,

Peres²

2015

TMM

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a ResumoA realidade do mercado de minério de ferro é a exaustão dos minérios com elevado teor de ferro e o aumento da explotação de minérios pobres, com presença de complexas associações mineralógicas, que necessitam de maior detalhamento em suas caracterizações, aplicando técnicas tais como difração de raios-X, microscopia ótica, Mossbauer, QEMSCAN (Quantitative Evaluation of Minerals by Scanning Electron Microscopy), entre outras. Uma adequada caracterização mineralógica é fundamental para a determinação da melhor rota de processo a ser aplicada ao minério, através das informações sobre a assembleia mineralógica, morfologia e textura dos cristais e grau de liberação. O trabalho em questão avaliou quatro diferentes tipos de itabiritos, através das duas técnicas atualmente mais utilizadas para a caracterização mineralógica, sendo elas: microscopia ótica e QEMSCAN. Os resultados das análises indicam que as técnicas de caracterização se complementam. Palavras-chave: QEMSCAN; Microscopia ótica; Minério de ferro. OPTICAL MICROSCOPY AND QUANTITATIVE EVALUATION OF MINERALS BY SCANNING ELECTRON MICROSCOPY (QEMSCAN) APPLIED TO DIFFERENT TYPES OF IRON ORE AbstractThe reality of the iron ore market is the exhaustion of ore with high iron content and the increased exploitation of poor ores, with the presence of complex mineralogical associations, that need more detailed in their characterizations, applying techniques such as X-ray diffraction, optical microscopy, Mossbauer, Quantitative Evaluation of Minerals by Scanning Electron Microscopy, among others. A suitable mineralogical characterization is essential to determine the best process route to be applied to the ore through the information about mineralogical assembly, morphology and texture of the crystals and the degree of liberation. The study in question assessed four different types of itabirites, using methods currently to mineralogical characterization, called: optical microscopy and Quantitative Evaluation of Minerals by Scanning Electron Microscopy -QEMSCAN. Allowing thus to determine the most appropriate technique for each type of mineralogical assembly.

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Quantitative phase analysis of iron ore concentrates

Cited by 8 publications

References 3 publications

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

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

Utilization of standardless analysis algorithms using WDXRF and XRD for Egyptian iron ore identification

Técnicas De Microscopia Ótica E Microscopia Eletrônica De Varredura Automatizada (Qemscan) Aplicadas a Diferentes Tipologias De Minério De Ferro

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