Around 10–25% by weight of the total iron ore mined in India is currently being dumped in massive tailing ponds as slimes, posing enormous environmental hazard, apart from loss of millions of tonnes of iron ore values (Ravishankar et al., 1993). According to Weissenborn et al. (1994), the slimes have approximately 40–60% iron content. The ...
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Beneficiation of Synthetic Iron Ore Kaolinite Mixture Using Selective Flocculation. Lopamudra Pandaa*, S.K. Biswalb, Vilas Tathavadkara . R&D, Tata Steel Limited, …
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DOI: 10.4236/JMMCE.2010.911070 Corpus ID: 59043270; Beneficiation of Synthetic Iron Ore Kaolinite Mixture Using Selective Flocculation @article{Panda2010BeneficiationOS, title={Beneficiation of Synthetic Iron Ore Kaolinite Mixture Using Selective Flocculation}, author={Lopamudra Panda and S. K. Biswal and Vilas Tathavadkar}, journal={Journal of …
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A large number of iron ore tailings (IOTs) are produced in steel industry, posing threat to the environment during its storage and disposal. To effectively reutilize Fe in IOTs, we propose a comprehensive utilization scheme: (1) most Fe in IOTs is extracted by concentrated hydrochloric acid to form FeCl 3 flocculants; (2) after separation from …
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Further, Sadangi et al. (2020) studied a goethite-hematite iron ore evaluating the effect of anionic flocculant dosage (0-60 g/t of ore), solid content (10-35%), and pH (3-9). It was observed that ...
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In the present study, an iron ore slime sample containing 56.1% Fe was investigated using physical beneficiation, carbothermal reduction, and a microwave-assisted process; however, physical ...
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The beneficiation process for fines generally involves the usage of a lot of water and hence, the water needs to be reclaimed for sustainable plant operations. To reclaim and reuse process water, iron ore tailings are dewatered in huge thickeners from which maximum water is reclaimed by the process of flocculation (Kelly et al., 2010, …
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Beneficiation of alumina rich iron ore slimes is a major challenge for the Indian iron ore industry. Considering the limits of gravity and magnetic separation processes in the relatively finer size range in terms of achieving adequate separation efficiency, selective flotation (with and without selective flocculation) of iron ore slimes, which is being used …
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The present paper describes the beneficiation studies of Iron ore slime from Karnataka, India through dispersion and selective flocculation in presence of surfactants and polymers with a view to ...
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A number of starches and their derivatives were tested as gangue depressants during the upgrading of magnetite-taconite concentrates by flotation. A 600-gram (dry basis) sample of a wet concentrate analyzing 64.2% iron, and having a size consist of 92% passing 325 mesh, was placed in a Denver cell and diluted to 25 percent …
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During the beneficiation of low-grade iron ore, a lot of fines were generated during different unit operations. These fines report to the tailing pond for the settling of the particles. ... There are three groups of flocculants: organic synthetic flocculants, such as polyethyleneimine and polyacrylamide derivatives; inorganic flocculants, such ...
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The high molecular weight nonionic and anionic synthetic flocculants based on polyacrylamide are more frequently used [8]. ... the operations of thickening and deslaming of iron ore beneficiation ...
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Iron ore slimes with smaller particle size are better flocculated by the neutral flocculants than those with a larger particle size. Discover the world's research 25+ million members
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2.1 Materials. Tata Steel Ltd., has its Chromite Ore Beneficiation (COB) plant at Sukinda zone, Jajpur district of Odisha state, India. It was observed that during beneficiation, substantial quantity of chromite tailings was produced and these tailings were stocked in the dam [2, 3].For research work, tailing sample was collected from …
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assaying 66.2% Fe and <2% Al with a yield of 67.4% by weight (with a recovery of 77% of iron. values) using PVP (1 ppm dosage) and corn starch (20 ppm) for one of the slim e sample (Sample. I) as ...
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The most common flocculants that are used commercially for the settling of iron ore are natural polymers such as starch and synthetic polymers such as polyacrylamide (PAM) and polyacrylic acid ...
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This study aims to beneficiate low grade goethitic iron ore fines using a selective flocculation process. Selective flocculation studies were conducted using different polymers such as starch amylopectin (AP), poly acrylic acid (PAA), and a graft copolymer (AP-g-PAA). The obtained results were analyzed; they indicate the enhancement of the …
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Recovery of iron values from the Barsua iron ore slimes containing 56% Fe, 4.8% SiO2, 7.2% Al2O3 and 7.0% LOI by the addition of synthetic colloidal magnetite and oleate colloidal coating followed ...
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The obtained results were analyzed; they indicate the enhancement of the iron ore grade from 58.49% to 67.52% using AP-g-PAA with a re- covery of 95.08%. In addition, 64.45% Fe with a recovery of ...
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Beneficiation of low-grade iron ore was carried out by selective flocculation process using different flocculants, namely starch amylopectin (AP) and grafted copolymer of amylopectin (GAP). The iron ore used in the investigation contained 56.98% Fe, 5.45% Al 2 O 3, and 4.22% SiO 2. Flocculant dosage, number of floc washing, and pH were ...
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A starch based binary graft copolymeric flocculant was synthesized. •. Dewatering performance of the flocculant was measured for iron-ore settling process. …
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It can be seen that the iron grade of the. flocculated settled mass increases with increasing. concentration of PAM flocculant to a maximum value of. 62.72% at a recovery of 97.35% using 0.09 mg/g ...
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Beneficiation; iron ore; selective flocculation 1. Introduction ... compared with other synthetic flocculants.[11,12] The major sources of starch are potato, corn, maize, tapioca, and cassava.
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Iron ore washing plants generate slimes in significant volumes, which need to be treated for meeting the raw material demand as well as environmental mitigation. Selective flocculation, an emerging fines beneficiation route, has been chosen for the upgradation of Barsua iron ore slimes. Characterization studies revealed that the …
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Flocculants are beneficial in the settling of Iron Ore tailings. • Polyacrylamide is more effective than guargum and alstafloc. • Iron Ore tailings slurry …
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Request PDF | On Sep 1, 2013, M.I. Abro and others published Dual polymer flocculation approach to overcome activation of gangue minerals during beneficiation of complex iron ore | Find, read and ...
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Panda et al. (2018) carried out a study on the application of the selective flocculation process for the beneficiation of synthetic mixtures of iron ore and kaolinite …
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Both are known to behave as selective flocculants in the beneficiation of iron ore slimes. This paper compares these two types of flocculants in achieving selective separation of iron oxide from clay.
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Beneficiation of alumina rich iron ore slimes is a major challenge for the Indian iron ore industry. High alumina is deleterious for the performance of both blast furnace as well as sintering plants.
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Abstract and Figures. Beneficiation of alumina rich iron ore slimes is a major challenge for the Indian iron ore industry. High alumina is deleterious for the performance of both blast furnace as ...
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Comparative Evaluation of Natural and Synthetic Flocculants on Selective Metal Recovery from Low-Grade Iron Ore Slimes Transactions of the Indian Institute of Metals 10.1007/s12666-019-01726-9
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Enhanced recovery of low-grade iron ore by selective flocculation method. K. Tudu, Shravan Kumar, N. Mandre. Materials Science. 2018. ABSTRACT Beneficiation of low-grade iron ore was carried out by selective flocculation process using different flocculants, namely starch amylopectin (AP) and grafted copolymer of amylopectin (GAP).….
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Iron ore is essential in steel making; however, high-grade ores have diminished, making low-grade ores inevitable. These low-grade iron ores need further beneficiation to upgrade the iron content. Currently, traditional physical and chemical methods are utilized and are not environmentally friendly. Bio-beneficiation techniques …
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Fine gangue material or iron ore slimes having <45%–55% Fe are discarded as reject during the ore beneficiation process. Aiming towards the good quality (>60% Fe) ore and its non-renewable nature, the mineral rich ore is depleting, and the slimes are increasing at a rate of ∼11–13% for the hematite reserves in India, as reported by the ...
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Here the study focuses on the application of selective flocculation process for beneficiation of synthetic mixtures of iron ore and kaolinite as well as iron ore tailings. …
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The present investigation aims at detailed beneficiation of the low-grade goethitic ore of Gua iron ore mines from Jharkhand using selective flocculation process and modified starch as flocculant. The main purpose of this study is to determine the modified starch to be a novel flocculant for iron fines processing. Chemical composition …
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DFT computations and DOE studies show guar gum (GG) as a promising selective flocculant for alumina-rich iron ore slimes.. GG adsorption on hematite much stronger as compared to other constituent minerals goethite, gibbsite and kaolinite.. GG – hematite interactions are characterized by strong Fe O guar gum chemical interactions.. …
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