Characterization and Beneficiation Studies of a Low Grade Bauxite Ore

Rao, D. Sreenivasa; Das, B.

doi:10.1007/s40033-014-0050-8

Cited by 12 publications

(4 citation statements)

References 11 publications

(12 reference statements)

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“…Smaller amounts of magnesium, manganese, vanadium and gallium as well as other elements may be also found [12,13]. Greek bauxites are high grade compared to ores treated in several other parts of the word [14][15][16]. In Greece, 1.8 million tons are treated annualy mainly for the production of alumina (820,000 tons of which 480,000 tons are exported) and aluminium (185,000 tons of which 125,000 tons are exported).…”

Section: Introductionmentioning

confidence: 99%

Grinding Behavior and Potential Beneficiation Options of Bauxite Ores

2020

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This laboratory study investigates selective grinding and beneficiation options for a Greek bauxite ore. First, a series of batch grinding tests were carried out in order to investigate the grinding behavior of the ore and the effect of the material filling volume (fc) on the distribution of aluminium- and iron-containing phases. Then, the ground ore was subjected to magnetic separation either as received or after reduction roasting in order to further explore potential beneficiation options. The results showed that grinding of the ore exhibits non-first order behavior, while the breakage rate varies with grinding time. Additionally, Al2O3 tends to concentrate in the coarser than 0.300 mm product fraction, while fc 10% and 2 min of grinding time are considered optimum conditions for good distribution of Al2O3 and Fe2O3. When different product fractions were subjected to magnetic separation, it was seen that the non-magnetic product obtained from the 0.300–1.18 mm fraction was more rich in Al2O3. In this fraction, the Al2O3 content increased from 58 wt% in the feed to 67.9 wt%, whereas the Fe2O3 content decreased from 22.4 wt% in the feed to 13.5 wt%. When the ore was subjected to a two-step treatment, involving reduction roasting followed by magnetic separation, the Fe2O3 grade decreased from 20.8 to 5.1 wt%, but in this case the recovery was very low.

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Section: Introductionmentioning

confidence: 99%

Grinding Behavior and Potential Beneficiation Options of Bauxite Ores

2020

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“…), and various impurities in minor or little amounts. [1,2]. Zirconium as a rare element has been commercially produced in significant quantities about 1950 [3].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Zirconium From Iraqi Bauxite Ore

Aziz¹,

Jalhoom²,

Kheriallah³

2020

ETJ

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This research is devoted to the study of the extraction of zirconium from Iraqi Bauxite Ore by using hydrometallurgical method. The chemical analysis was done to the bauxite ore by using X-ray florescence, X-ray diffraction and atomic absorption spectroscopy. Zirconium Extraction was performed via three stages; the first stage is leaching of bauxite with sodium hydroxide for alumina leaching. The second stage is leaching of zirconium species from the remained powder produced from stage one after washing with deionized water and, nitric acid (HNO3 solutions). The results of the first stage has reflected the recovery of 42.27 % of Al2O3 which has been leached 100°C temperature, 7.5 molar of NaOH, liquid to solid ratio of 20/1, and stirring rate 450 rpm. The highest leaching percent of zirconium (Zr%) from the red mud approached 98.48 % at 100°C temperature, 7 molar acid concentration, 120 min. contact time, solid to liquid ratio (S/L) of 16/1, and stirring rate of 450 rpm. 99.47% recovery of zirconium was accomplished from nitric acid solutions by use of 3molar tri-n-butylephosphate (TBP)in kerosene at ,contact time for 6 min, and organic to aqueous phase (O/A) of 4/1.

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“…The mass fractions of TFe and Na 2 O in red mud were 39.19% and 3.10%, respectively. The principle of the calcification treatment of red mud from the Bayer process is that calcium and sodium are replaced in situ, sodium is liberated from the solid phase to the liquid phase, and then sodium in the original red mud is removed by washing [20][21][22]. The mass fraction of Na 2 O in calcified high iron red mud decreased from 3.10% to 0.54%.…”

Section: Methodsmentioning

confidence: 99%

Study on Reductive Smelting of High-Iron Red Mud for Iron Recovery

Yang

Chen

Zhang

et al. 2022

Metals

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In this paper, the characteristics and current problems associated with red mud and the progress of research on iron extraction from high-iron red mud are briefly described. By adding conditioning materials to red mud and quenching and tempering, the iron tailings extracted from red mud were reconstructed by heating to form molten tailings in the laboratory. A thermodynamic analysis of the iron reduction reaction during tailings reconstruction was performed, and the best conditions for iron extraction by calcified slag reduction were verified. The contents of CaO, Al2O3 and Na2O in the reduced tailings were 37.07, 37.67 and 0.48%, respectively. According to X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses, the main crystalline phases in the calcified extracted iron tailings were C2AS and CT, which aggregated and met the expected composition standard for calcified extracted iron tailings.

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Characterization and Beneficiation Studies of a Low Grade Bauxite Ore

Cited by 12 publications

References 11 publications

Grinding Behavior and Potential Beneficiation Options of Bauxite Ores

Grinding Behavior and Potential Beneficiation Options of Bauxite Ores

Extraction of Zirconium From Iraqi Bauxite Ore

Study on Reductive Smelting of High-Iron Red Mud for Iron Recovery

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