Caracterização tecnológica de rejeito de minério de ferro

Gomes, Marcos Antônio Silvestre; Pereira, Carlos Alberto; Peres, Antônio Eduardo Clark

doi:10.1590/s0370-44672011000200016

Cited by 21 publications

(14 citation statements)

References 1 publication

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“…The chemical composition of the sample is Fe 3 O 4 /Fe 2 O 3 /FeO(OH), SiO 2 , and Al 2 O 3 . The iron oxides identified by X-ray diffraction were hematite, martite, magnetite, and goethite; and the detected gangue minerals were quartz, gibbsite, and kaolinite 18 .…”

Section: Methodsmentioning

confidence: 99%

Use of iron mine tailing as fillers to polyethylene

Coura

Carmignano

Heitmann

et al. 2021

Sci Rep

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The iron mine tailings accumulation in dams is an environmental and economic problem. The composite based on high-density polyethylene/iron mine tailing production for the application of wood plastic and some items of domestic plastic industry can be a good alternative to reduce the rejects in the environment. This work presents the influence of the processing methodology in the mechanical, thermal and morphological properties of composites based on the high-density polyethylene/iron mine tailing. Four methodology processing by continuous and/or batch mixing were available. The iron mine tailing particles in the polymer matrix promoted an increase in mechanical strength and thermal stability. Besides, the particles acted as flame retardant. The iron mine tailing materials produced using batch mixing showed more significant modifications in the properties due to the better dispersion of the filler as shown by scanning electron microscopy.

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Section: Methodsmentioning

confidence: 99%

Use of iron mine tailing as fillers to polyethylene

Coura

Carmignano

Heitmann

et al. 2021

Sci Rep

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“…The QF is characterized by important iron ore reserves, which over time it have become gradually poorer due to the lower iron content itabirites 6 . With the gradual reduction of iron content, the minerals characterization studies become even more important in order to ensure the production of concentrates in the quality specifications required metallurgical process.…”

Section: Introductionmentioning

confidence: 99%

Mineralogical Characterization of Iron Ore Tailings from the Quadrilatero Ferrifero, Brazil, by Eletronic Quantitative Mineralogy

et al. 2019

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The mineralogical characterization studies search for the best processing route, with the lowest environmental impact, aiming to improve the use of mineral resources. The electronic quantitative mineralogy (EQM) provides quickly and accurately great information about the characteristics of these materials. This work aims to characterize iron ore tailings by EQM as the main tool. It has selected seven samples of itabirite ores flotation tailings from the main mining regions of the Quadrilatero Ferrifero, Brazil. All samples were mostly composed by quartz and iron minerals, with a low presence of mixture particles of these minerals-less than 20% of the sample mass. Due to the difference between the size of particles of quartz and iron minerals, it has observed an opportunity to reprocess the fractions-37μm + 5μm of the studied tailings, with a potential recovery of 12% of the total sample mass generated for AM4, AM6 and AM7 and more than 5% for samples AM1, AM2, AM3 and AM5.

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“…Esse último é produzido em grandes quantidades, provocando impactos ao meio ambiente e ocasionando custos na manutenção de barragens para as mineradoras. Teoricamente, o rejeito deveria possuir baixo teor do mineral de interesse, porém, as caracterizações tecnológicas de rejeitos de minérios de ferro de diversos autores identificaram um teor considerável de ferro [1][2]. Analisando esses resultados, é plausível entender o porquê do interesse em pesquisar e desenvolver novas tecnologias de concentração para a indústria mineral.…”

Section: Introductionunclassified

Avaliação Técnica Da Lama De Minério De Ferro Para Obtenção De Pelotas

Cunha¹,

Silva²,

Mendes³

et al. 2016

ABM Proceedings

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ResumoDiante do cenário macroeconômico internacional, o setor mineral busca soluções inovadoras e sustentáveis para seus processos produtivos. Uma dessas soluções é, sem dúvida, aumentar a recuperação do mineral de interesse presente no rejeito proveniente de operações de beneficiamento de baixa recuperação metalúrgica. A substituição de matérias primas naturais por resíduos abre uma gama de oportunidades para melhorar a gestão de recursos não renováveis, contribuindo significativamente para o desenvolvimento sustentável e competitividade do negócio. O presente trabalho tem o objetivo de definir qual a faixa granulométrica, existente na lama, é mais adequada para concentrar e produzir pelotas, considerando a composição química, perda por calcinação, mineralogia e quantidade de elementos deletérios. Para isso, foram utilizadas técnicas de caracterização tecnológica, como: classificação granulométrica (peneiramento a úmido e cyclosizer), fluorescência de raios X, difração de raios X e microscopia óptica. Os resultados do trabalho permitiram identificar uma faixa granulométrica com alto teor de ferro e alto grau de liberação dos minerais de ferro, porém com teores de quartzo acima que um pellet feed comercial. Sendo assim, um determinado tratamento de concentração ou um blend será necessário para adequar quimicamente o material, para posterior obtenção de pelotas com baixo custo. Palavras-chave: Minério de ferro; Lama; Pelota. TECHNICAL EVALUATION OF IRON ORE TAILLINGS FOR OBTAINING PELLET AbstractIn the face of international macroeconomic scenario, the mining sector seeks innovative and sustainable solutions for their production processes. One of these solutions is undoubtedly increase the recovery of the mineral present in the waste interest from low metallurgical recovery processing operations. The replacement of natural raw materials by waste opens a range of opportunities to improve the management of non-renewable resources, contributing significantly to sustainable development and business competitiveness. This study aims to define the particle size range, existing in the mud, it is more appropriate to focus and produce pellets, considering the chemical composition, combustion loss, mineralogy and quantity of deleterious elements. For this technological characterization techniques were used, such as size classification (wet sieving and cyclosizer), X-ray fluorescence, X-ray diffraction and optical microscopy. Our results have identified a granulometric range with high iron content and high degree of release of iron minerals, but with quartz content above a pellet commercial feed. Thus, a particular treatment concentration or blend will be required to chemically tailor the material to subsequently obtain pellets with low cost.

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Caracterização tecnológica de rejeito de minério de ferro

Cited by 21 publications

References 1 publication

Use of iron mine tailing as fillers to polyethylene

Use of iron mine tailing as fillers to polyethylene

Mineralogical Characterization of Iron Ore Tailings from the Quadrilatero Ferrifero, Brazil, by Eletronic Quantitative Mineralogy

Avaliação Técnica Da Lama De Minério De Ferro Para Obtenção De Pelotas

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