Characterization and Pre-concentration of Low Grade PGE Ores of Boula Area, Odisha using Gravity Concentration Methods

Jena, M. S.; Mohanty, J. K.; Sahu, Pooja; Venugopal, R.; Mandre, N. R.

doi:10.1007/s12666-016-0998-1

Cited by 17 publications

(10 citation statements)

References 18 publications

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“…Common gravity separation equipment includes shaking table, spiral chute, and jigging concentrator. The effectiveness of gravity separation equipment is closely related to the size and shape characterizations of gold particles (McGrath et al, 2015;Jena et al, 2017). In this study, three different feeds were prepared by grinding the whole sample to less than 0.8 mm, less than 0.2 mm and less than 0.075 mm.…”

Section: Upgrading Of Gold Sample Using Gravity Separationmentioning

confidence: 99%

Mineralogical study and enhanced gravity separation of gold-bearing mineral, South Eastern Desert, Egypt

Abdel-Khalek¹

2020

Physicochem. Probl. Miner. Process.

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El-Hudi gold deposit, located in the South Eastern Desert of Egypt, represent large vein-type gold occurrence. The representative sample revealed the abundance of quartz as main constituent with minor amounts of mineral impurities. Gold was detectable (12 g/t) as determined using atomic absorption. The petrographic study revealed that the gold grains ranged from 10-40 µm. The grain boundaries of quartz are highly stained with iron minerals as hematite and limonite. Sericite mineral is common in discrete gold-bearing veins. Eroded pyrite was detected with high alteration leaving only cubic-shaped cavities behind. Different techniques for gravity separation were used to separate gold from the quartz mineral. After crushing and grinding of the sample, shaking table was used to upgrade the coarser fractions while Falcon concentrator was employed to upgrade the fine fraction. The best concentrate was obtained through grinding the whole sample to less than 0.2 mm, followed by cleaning steps. The gold content is increased from 12 to 145 g/t with total recovery of 78%.

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Section: Upgrading Of Gold Sample Using Gravity Separationmentioning

confidence: 99%

Mineralogical study and enhanced gravity separation of gold-bearing mineral, South Eastern Desert, Egypt

Abdel-Khalek¹

2020

Physicochem. Probl. Miner. Process.

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“…For that reason, it is important to carry out a geometallurgical and diverse characterization analysis, which allows for a better observation of the different characteristics of the ore and its impact on the treatment of generated tailings [17,21,22]. The steps commonly employed in the processing of raw ore include crushing and grinding, screening, classification, concentration, dewatering, and disposal of tailings [23][24][25]. For the concentration and treatment of tailings, the steps commonly employed are classified using spirals, hydrocyclones, magnetic concentration, and flotation [14,26,27].…”

Section: Introductionmentioning

confidence: 99%

Potential Uses of Artisanal Gold Mine Tailings, with an Emphasis on the Role of Centrifugal Separation Technique

et al. 2022

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Few investigations have focused on the potential uses of artisanal gold (Au) mine tailings, despite the fact that artisanal gold mining activity contributes to environmental issues such as greenhouse gas. Mineralogical characterizations of artisanal gold mine tailings in Miyove gold mine (Baradega and Masogwe) in Rwanda were investigated for potential utilization as a source of valuable gold, using the centrifugal separation technique. Results of X-ray diffraction analysis, energy dispersive X-ray spectroscopy, inductively coupled plasma mass spectrometry, inductively coupled plasma–optical emission spectroscopy, and X-ray fluorescence showed that artisanal gold mine tailings samples have significant amounts of gold to justify economical gold extraction opportunity. The gold grades in the ores and artisanal gold mine tailings were in the ranges of 37–152 and 2–7 g t−1, respectively. Quartz was a major phase, with minor impurities in two different types of gold ores and their respective tailings. The beneficiation carried out using centrifugal separation, regarded as an extension of gravity separation, showed gold grades in the range of 535–1515 g t−1 for gold ores and 36–302 g t−1 for artisanal gold mine tailings. The gold recoveries for ores and artisanal gold mine tailings were in the range of 21.8–47.3% and 46.9–63.8%, respectively. The results showed that the centrifugal separation technique was more efficient in boosting gold recovery compared to the present panning approach employed at the site, which sometimes recover as low as 10%. The results suggest that mineralogical characterization of artisanal gold mine tailings allows for the development and design of a suitable methods for improving gold ore beneficiation and artisanal gold mine tailings reprocessing.

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“…Carlin-type gold ore is one of the largest types of hydrothermal gold deposits in the world [1]. Studies have shown that a large amount of gold in this type of gold ore is present in sulfide minerals (pyrite and arsenopyrite) in micro-disseminated form, and the finer the size of the gold particles is, the more difficult they are to recover [2,3]. Therefore, research into Carlin-type gold mines has become a topic of increased research interest worldwide, with a particular focus on the pretreatment technology for gold-bearing sulfide ore.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Gold-Bearing Pyrite by Ammonium Persulfate

Tang

Yong

et al. 2021

J. Sustain. Metall.

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Advanced oxidation processes (AOPs) are widely used in water treatment. Thus, we applied an FeSO 4 -S 2 O 8 2− system to the oxidation pretreatment of Carlin-type primary gold ore. Based on this research, we have continued to explore the initiator (nZVI/FeO/FeSO 4 ) in the ammonium persulfate (APS) system. In this study, when the concentration of nano-zero-valent iron (nZVI) was 0.0895 mol/L, the APS concentration was 0.088 mol/L, and the leaching time was 1 h, the oxidation of pyrite reached 92.69%. A quantitative analysis method was established for intermediate SO 4 − •, and it was determined that the concentration of SO 4 − • during the oxidation of pyrite in the nZVI-APS system rapidly increased to 7.533 mmol/L within 7 min, was maintained above 6.5 mmol/L for 7 to 15 min, and then rapidly decreased to 0 mmol/L. Within a certain period of time, the stable concentration of SO 4 − • ensured a rapid increase in the pyrite oxidation rate. The analysis of the oxidized leaching residue shows that the surface of the pyrite in the nZVI(FeO)-APS system had a large specific surface area and a fine particle structure of iron hydroxide oxide (FeOOH), the leaching residue formed depressions and cracks, and the surface area of the pyrite increased, which was conducive to the subsequent contact between leachant and gold. In conclusion, the nZVI(FeO)-APS system can effectively and rapidly oxidize pyrite at room temperature and form a good pulp environment, thereby creating favorable conditions for the subsequent improvement of the gold leaching rate.

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Characterization and Pre-concentration of Low Grade PGE Ores of Boula Area, Odisha using Gravity Concentration Methods

Cited by 17 publications

References 18 publications

Mineralogical study and enhanced gravity separation of gold-bearing mineral, South Eastern Desert, Egypt

Mineralogical study and enhanced gravity separation of gold-bearing mineral, South Eastern Desert, Egypt

Potential Uses of Artisanal Gold Mine Tailings, with an Emphasis on the Role of Centrifugal Separation Technique

Oxidation of Gold-Bearing Pyrite by Ammonium Persulfate

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