Dispersion-flocculation studies on hematite-clay systems

Gururaj, B.; Sharma, Jyoti; Baldawa, A.; Arora, Shalini; Prasad, N.; Biswas, Arindam

doi:10.1016/0301-7516(83)90050-9

Cited by 57 publications

(20 citation statements)

References 8 publications

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“…The selective adsorption of starch onto hematite instead of the gangue minerals is of critical importance not only for the flotation of iron ore, but also for the selective flocculation of iron ore as well, since starch appears to be more selective than other flocculants such as polyacrylamides and polyacrylic acid (Weissenborn et al, 1994;Ravishankar et al, 1995). In the literature, flotation and selective flocculation have both been investigated for the removal of alumina containing minerals from iron ore (Gururaj et al, 1983;Ravishankar et al, 1988;Mahiuddin et al, 1989;Pradip et al, 1993;Ravishankar et al, 1995;Weissenborn et al, 1995;Ma et al, 2009). However, the adsorption behaviour of starch on alumina containing minerals, the role of steric forces in the system of starch and alumina containing minerals, and the effect of pH and ionic strength remain unknown.…”

Section: Introductionmentioning

confidence: 99%

The effect of pH and ionic strength on starch–kaolinite interactions

Bruckard

2010

International Journal of Mineral Processing

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Section: Introductionmentioning

confidence: 99%

The effect of pH and ionic strength on starch–kaolinite interactions

Bruckard

2010

International Journal of Mineral Processing

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“…In the literature, flotation and selective flocculation have both been investigated for the removal of alumina containing minerals from iron ore (Gururaj et al, 1983;Ravishankar et al, 1988;Mahiuddin et al, 1989;Pradip et al, 1993;Ravishankar et al, 1995;Weissenborn et al, 1995;Ma et al, 2009;Ma and Bruckard, 2010).…”

Section: Introductionmentioning

confidence: 99%

Role of hydrolyzable metal cations in starch–kaolinite interactions

2010

International Journal of Mineral Processing

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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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Dispersion-flocculation studies on hematite-clay systems

Cited by 57 publications

References 8 publications

The effect of pH and ionic strength on starch–kaolinite interactions

The effect of pH and ionic strength on starch–kaolinite interactions

Role of hydrolyzable metal cations in starch–kaolinite interactions

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

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