Effect of mineral geology, mineral size and settling time on selective dispersion and separation process for recovering iron value from iron ultra fines

Manna, M.; Sasmal, Sukanya; Banerjee, P. K.; Sengupta, Dilip K.

doi:10.1016/j.powtec.2011.03.032

Cited by 16 publications

(3 citation statements)

References 14 publications

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“…Mineral processing techniques, such as flotation and flocculation, could be very useful for the recovery of complex ores with large amount of fine particles [8][9][10][11][12]. These techniques often include interfacial processes that depend on mineralogical heterogeneity of fine particles surfaces.…”

Section: Introductionmentioning

confidence: 99%

Influence of Mechanical Activation on Improvement of Dispersion Behavior of Gоethite, Quartz and Clay Minerals in the Presence of Different Dispersants

Tankosić

Sredić

2023

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The paper focuses on the mechanical treatment of natural goethite,quartz and clay minerals, aiming at improving their dispersion behavior in the presence of different dispersants. The subject of research of mechanical activation is the change of the state of the material under the action of mechanical forces, whereby the newly created state of the material is defined as “activated”. The paper presents tests and analysis of the possibility of applying mechanoactivation of the mineral surface by grinding and multistage grinding in the planetary mill, for improving reactions with surface-active reagents. The results showed that the greatest resistance to grinding has the sample of goethite (Moss hardness 5-5.5). The influence of mechanoactivation was analyzed on the basis of the results of chemical analyzes and the ratio of sediment and overflow masses. Mechanical activation encourages better dispersion when activated minerals are treated with selected dispersants.

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Section: Introductionmentioning

confidence: 99%

Influence of Mechanical Activation on Improvement of Dispersion Behavior of Gоethite, Quartz and Clay Minerals in the Presence of Different Dispersants

Tankosić

Sredić

2023

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“…Physical methods can be classified into three categories: gravity separation, magnetic separation and flotation separation. Gravity separation is the most frequently used method, involving hydrocyclone classification, 8,10,11 dispersion-flocculation, [12][13][14][15][16][17] jigging, 18,19 and teetered bed gravity separation, 20 enhanced gravity separation, 7 multi-gravity separation. 21 Magnetic separation includes high intensity magnetic separation, 22,23 high gradient magnetic separation 24 and selective magnetic coating.…”

Section: Introductionmentioning

confidence: 99%

Separation of aluminium and preparation of powdered DRI from lateritic iron ore based on direct reduction process

Jiang

Yang

et al. 2016

Canadian Metallurgical Quarterly

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Lateritic iron ore has not been used effectively due to excess content of multiple metals. In this work, separation of aluminium from a high-aluminium lateritic iron ore was achieved by the process of 'direct reduction with sodium sulfate-magnetic separation', with a powdered direct reduced iron (DRI) produced. It is found that the presence of 12% sodium sulphate during reductive roasting significantly improves separation of iron and aluminium in magnetic separation: the total iron grade (TFe) of powdered DRI increases from 80.6 to 92.0% and the Al 2 O 3 content decreases from 9.8 to 1.3% correspondingly. The presence of sodium sulphate results in formation of sodium aluminosilicates instead of FeAlO 2 . Moreover, sodium sulphate significantly promotes growth of metallic iron grains which is beneficial to sufficient liberation and separation of metallic iron grains from gangue minerals in grinding and magnetic separation.Le minerai de fer latéritique n'est pas utilisé de manière optimale du fait de la présence en excès de plusieurs autres métaux dans sa composition. Dans cette étude, la séparation de l'aluminium, issu d'un minerai de fer latéritique à haute-teneur en aluminium, est atteinte par le processus de « réduction directe par séparation magnétique du sulfate de sodium ». Ce processus produit une poudre de fer réduite directement (FRD). Lors du grillage réducteur, la présence de 12% de sulfate de sodium améliore significativement la séparation de fer et aluminium par séparation magnétique: la teneur totale en fer (TFe) de la poudre FRD augmente de 80.6% à 92.0%, tandis que celle de l'alumine diminue de 9.8% à 1.3%. La présence du sulfate de sodium mène à la formation d'aluminosilicates de sodium, au lieu de FeAlO 2 . De plus, le sulfate de sodium favorise de façon significative la croissance de grains de fer métallique. Ceci s'avère favorable à la bonne libération et séparation des grains de fer métallique de la gangue dans le cadre du broyage et de la séparation magnétique.

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“…Sodium hexametaphosphate is commonly used as a dispersant for such materials. 14) In view of the utilization of these ultra fines which do not need further size reduction requiring high energy and minimizing environment problem, the present study has been undertaken. This paper reports and discusses the results of the dispersion study which shows that gangue minerals could be selectively dispersed leaving behind the valuable iron bearing minerals.…”

Section: Introductionmentioning

confidence: 99%

Selective Dispersion of Rejected Iron Ore Ultra Fines for Feed to Blast Furnace and Minimize Environmental Issues

Manna¹,

Sasmal²,

Banerjee³

et al. 2011

ISIJ Int.

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Indian iron mines dumps huge quantity of ultra fines containing high gangue minerals resulting in loss of iron values and environmental issues. The major gangue minerals containing alumina, silica and phosphorous are the cause for contamination of Indian iron ore. It has, therefore, become an urgent need to utilize these off-grade ultra fines after making it suitable for blast furnace charging. Due to the fine nature of these ultra fines, selective dispersion studies have been thought of. Two types of dispersants (i) inorganic, sodium hexametaphosphate and (ii) organic, sodium salt of poly acrylic acid have been tried. The performance of these two types of dispersions has been evaluated in separation process. Sodium salts of poly acrylic acid shows better separation of alumino silicate minerals in the ultra fines whereas, sodium hexametaphosphate efficiently separates out silica from the iron bearing minerals.

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Effect of mineral geology, mineral size and settling time on selective dispersion and separation process for recovering iron value from iron ultra fines

Cited by 16 publications

References 14 publications

Influence of Mechanical Activation on Improvement of Dispersion Behavior of Gоethite, Quartz and Clay Minerals in the Presence of Different Dispersants

Influence of Mechanical Activation on Improvement of Dispersion Behavior of Gоethite, Quartz and Clay Minerals in the Presence of Different Dispersants

Separation of aluminium and preparation of powdered DRI from lateritic iron ore based on direct reduction process

Selective Dispersion of Rejected Iron Ore Ultra Fines for Feed to Blast Furnace and Minimize Environmental Issues

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