Process to Recover Iron Values from High-Alumina Indian Iron Ore Slime—a Bench-Scale Study

Mukherjee, Arunabh; Thella, John; Makhija, Dilip; Patra, Abhay Shankar; Manna, M.; Ghosh, Tamal

doi:10.1080/08827508.2013.867854

Cited by 17 publications

(3 citation statements)

References 25 publications

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“…Chemical analyses for the slime showed that the surface-active agents (AD 200 and humate) significantly remove gangue minerals and increase the iron value 2-7% with 58-74% recovery depending on the pH of the suspension. A bench-scale beneficiation study also produces a concentrate of 2.2% alumina from slime of 7-9% alumina [29]. Nevertheless, the application of magnetic separator technique results in an iron concentrate with 65% Fe from the raw slime having 59.22% Fe and with 50% recovery from a 10% slime slurry [30].…”

Section: Stability Of Suspension (10 Wt %) Using Differentmentioning

confidence: 99%

Upgradation of Iron Ore Fines and Slime by Selective Flocculation Using Surface-Active Agents, Settling Study, and Characterization of the Beneficiation Waste for Value Addition

Sarma

Rajkhowa²,

Mahiuddin

2022

Journal of Chemistry

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Washing of iron ore fines and slime (10% and 25% w/v, slurry concentrations) with two types of surface-active agents (sodium humate (synthesized) and AD 200 (commercial)) at varying concentrations at pH 8 was conducted for ascertaining the efficacy of dispersants in beneficiating the low-grade iron ores. The beneficiation process follows the “selective dispersion-cum-settling technique.” The process results in the formation of a dispersed phase rich in gangue minerals and a settled phase of predominantly active hematite mineral. The stability of dispersed phase (DP) was evaluated by determination of the percentage solid content in the DP. Settling tests were performed. First-order kinetic models have been applied to the dispersion-cum-settling behaviour of both the samples, and evaluated kinetic parameters were found to have good agreement with experimental data. Removal of gangue minerals from iron ore depends on the pH of the slurry, concentration of the slurry, and concentration of the surface-active agent used. The surface-active agents at pH 8 produce ∼1.2–1.5 times more stable suspension in the case of iron ore fines and slimes than that of without surface-active agent. They significantly remove gangue minerals and increase the iron value ∼2–7% with ∼58–74% recovery depending on the experimental conditions. The concentrates collected satisfy the required specifications (Al203/Fe < 0.05 and Al203/Si02 < 1). The gangues in the dispersed phase as characterised by “SEM-EDXA” are mostly clay-bearing minerals like kaolinite, goethite, chlorite, and alumina-silicate minerals. Heat treatment causes distortion of clay minerals present in the dispersed phase and also indicates the complex nature of the gangue minerals.

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Section: Stability Of Suspension (10 Wt %) Using Differentmentioning

confidence: 99%

Upgradation of Iron Ore Fines and Slime by Selective Flocculation Using Surface-Active Agents, Settling Study, and Characterization of the Beneficiation Waste for Value Addition

Sarma

Rajkhowa²,

Mahiuddin

2022

Journal of Chemistry

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“…But these processes are not effective for handling the ultrafine particles present in the tailings. For Indian iron ore, alumina is the major concern, which causes critical problems in the blast furnace [3,4]. Extensive studies were conducted to beneficiate the iron ore to meet the specification of blast furnace grade by enriching the Fe (%) and reducing the Al 2 O 3 (%).…”

Section: Introductionmentioning

confidence: 99%

“…Ahmed et al [17] reported that for smaller particle size, liberation will be better and selective flocculation will perform better [17]. Mukherjee et al [4] attempted a selective flocculation process for beneficiation of ultrafine iron ore (< 10 mm) by classifying the feed in a hydrocyclone in the laboratory scale [4]. Though the process was successfully established in the laboratory scale, the commercial application of this technique is very limited.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the mechanism for selective flocculation process using natural iron ore tailings

Panda

Biswal

Venugopal

et al. 2020

Metall. Res. Technol.

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A huge quantity of iron ore tailings was generated every year from the iron ore washing plants during beneficiation. These discarded tailings were stored in the tailing pond. Safe storage and handling of these tailings are a major concern to the management. Due to depletion of high-grade ore, the government of India had reduced the cut-off grade from 55 to 45% because of the shortage of the iron ore reserves. Ultrafine particles present in the tailings cannot be treated effectively by the conventional methods due to particle size limitations. For Indian iron ore, associated gangue mineral alumina is the major source which causes problems in the blast furnace. Removal of alumina from the iron ore of ultrafine size is a hill task. A selective flocculation approach was employed to the iron ore tailings which contain 50.98% of Fe (T) with 8.86% of Al2O3 assay. It was observed that, when applying a selective flocculation process, the concentrate contains more than 63.48% Fe (%), 2.5% Al2O3 with 31.196% recovery (%). The mechanism was investigated using zeta potential analysis, FTIR analysis, etc.

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Effect of molasses binder on the physical and mechanical properties of iron ore pellets

Kotta

Patra

Kumar

et al. 2019

Int J Miner Metall Mater

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Process to Recover Iron Values from High-Alumina Indian Iron Ore Slime—a Bench-Scale Study

Cited by 17 publications

References 25 publications

Upgradation of Iron Ore Fines and Slime by Selective Flocculation Using Surface-Active Agents, Settling Study, and Characterization of the Beneficiation Waste for Value Addition

Upgradation of Iron Ore Fines and Slime by Selective Flocculation Using Surface-Active Agents, Settling Study, and Characterization of the Beneficiation Waste for Value Addition

Investigation of the mechanism for selective flocculation process using natural iron ore tailings

Effect of molasses binder on the physical and mechanical properties of iron ore pellets

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