Dual polymer flocculation approach to overcome activation of gangue minerals during beneficiation of complex iron ore

Abro, Muhammad Ishaque; Pathan, Abdul Ghani; Memon, Abdul Rehman; Sirajuddin, Sirajuddin

doi:10.1016/j.powtec.2013.04.043

Cited by 15 publications

(5 citation statements)

References 30 publications

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“…The lowest CST of 12·5 s was achieved when 160 g ton − 1 each IF 477 and Guargum were added. The results for synthetic mineral mixtures reported by Marcin et al , 17 Ahro et al , 18 Fan et al 19 2002 and Besra et al 20 show that the beneficial impact of polymer blends in flocculation is due to two principle mechanisms: (i) adsorption of the first polymer leads to the modification in the characteristics of mineral surface sites resulting in the provision of selective adsorption sites for the second polymer; and (ii) side blocking action consisting of blocking of surface sites of a given mineral by first polymer paving way for the second polymer to adsorb on other minerals. However, the situation in real systems like the present case is more complicated, and more detailed studies are essential to understand the mechanism involved.…”

Section: Resultsmentioning

confidence: 86%

Application of response surface method of optimization in flocculant assisted filtration of uranium bearing alkaline leach slurry of limestone origin

Serajuddin

Sreenivas

2015

Mineral Processing and Extractive Metallurgy

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Leach slurries of alkaline nature often show very low rate of filtration due to high pulp viscosity contributed by dissolved solutes in solution and very fine grained nature of the unleached solids. Maximisation of filtration performance generally needs exhaustive experimentation involving various parameters which influence the solid–liquid separation process. The study reported in this paper pertains to optimisation of parameters in vacuum filtration of uranium bearing alkaline leach slurry generated from a brecciated limestone ore using response surface methodology. The d80 size of solids in the leach slurry is 60 μm and the pH of the pulp is 9·5–10. Initial screening of various commercial flocculants of anionic, cationic and non-ionic nature was carried out using the capillary suction time (CST) as basis. Minimum CST was achieved using a combination of anionic and non-ionic flocculant namely the Indfloc (IF) 477 and Guargum. The dosages of the flocculant combination and the slurry temperature were optimised to achieve maximum rate of filtration with optimal cake moisture under vacuum filtration conditions.

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Section: Resultsmentioning

confidence: 86%

Application of response surface method of optimization in flocculant assisted filtration of uranium bearing alkaline leach slurry of limestone origin

Serajuddin

Sreenivas

2015

Mineral Processing and Extractive Metallurgy

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“…mong the well-known iron ore deposits in the Pakistan, Dilband ore deposits are mainly lean grade hematite usually consisting an intimate mixture of hematite and quartz with sufficient amount of kaolinite, calcite and fluorapatite minerals [1,2]. At the time of exploration of Dilband iron ore deposits by Geology Survey of Pakistan (GSP) it was dreamed that ore will play vital role in the economic growth of Pakistan, and import of foreign ores for the Pakistan Steel Mills Limited (PSM) will be reduced.…”

Section: Introductionmentioning

confidence: 99%

Selective Flocculation Study of Hematite in HematiteQuartz-Kaolinite System in Presence of Ca2+, Mg2+ and Fe3+ Ions. Part1: Optimization of Ligand

Abro

Laghari

Aftab

et al. 2021

Mehran Univ. res. j. eng. technol.

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Separation of ultrafine hematite from quartz and kaolinite gangue minerals using selective flocculation technique is markedly affected by the state of inter mineral interaction which is governed by type and content of polyvalent metal ions. Because of the presence of polyvalent metal ions hetracoagulation of gangue minerals is widely acknowledged, thus selective flocculation of ultrafine hematite from associated gangue minerals is challenging task when their concentration is above 10 ppm. This study has shown that state of strong interaction of gangue minerals with hematite due to presence of 15 ppm Ca2+, 3 ppm Mg2+ and 3 ppm Fe3+ ions can be weakened by addition of optimal dose of Sodium Hexametaphosphate (SHMP) ligand. The optimization of ligand dose is achieved through analysis of Zeta Potential (ZP) as a function of slurry pH. It is noted that 50 ppm of SHMP is sufficient to restore the ZP of hematite, where selective dispersion of the slurry constituents are possible. Our results further showed that conventional strategy of obtaining minimum difference of ±30 mV in the ZP of hematite and gangue minerals quartz and kaolinite would not work especially in the presence of 15 ppm Ca2+, 3 ppm Mg2+ and 3 ppm Fe3+ ions. Attempts to achieve the minimum threshold difference in the ZP of the minerals will cause over dispersion.

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“…The flocculation behaviour of mineral components depends on the surface properties. Selective flocculation studies of iron ore were carried out using different flocculants, such as starch [13][14][15][16][17], polyacrylamide [18][19][20][21][22], oleate [23][24][25][26][27], etc., but mostly on hematite. The characteristics of ores/slimes from different localities differ substantially and the knowledge about fine goethite ore processing is still relatively poor [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the influence of polyacrylamide and sodium oleate on selective flocculation of goethite from sludge

Tankosić¹,

Sredić²

2021

J Min & Metal A Mining

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The paper represents a part of research conducted with the aim of examining the possibility of applying selective flocculation of goethite from sludge that occurs in the process of iron ore production. The aim of this study was to compare the influence of polyacrylamide and sodium oleate as a flocculant on the settling behavior of goethite under different conditions. The paper presents the results of the research on the influence of the flocculants based on polyacrylamide and sodium oleate, as well as pH values on the settling rate of a natural goethite sample. The results showed that the settling rate of goethite was influenced by pH value and the type of flocculant, while the concentration of flocculant did not significantly affect the settling rate. Measurements of zeta potential showed the effect of flocculants on the surface of the goethite.

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Dual polymer flocculation approach to overcome activation of gangue minerals during beneficiation of complex iron ore

Cited by 15 publications

References 30 publications

Application of response surface method of optimization in flocculant assisted filtration of uranium bearing alkaline leach slurry of limestone origin

Application of response surface method of optimization in flocculant assisted filtration of uranium bearing alkaline leach slurry of limestone origin

Selective Flocculation Study of Hematite in HematiteQuartz-Kaolinite System in Presence of Ca2+, Mg2+ and Fe3+ Ions. Part1: Optimization of Ligand

Comparison of the influence of polyacrylamide and sodium oleate on selective flocculation of goethite from sludge

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