Pentlandite oxidation in the flotation of a complex nickel ore in saline water

Peng, Yongjun; Wang, B.; Bradshaw, Dee

doi:10.1016/j.mineng.2010.09.002

Cited by 11 publications

(2 citation statements)

References 5 publications

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“…By using this methodology, we maintained the same residence time for pentlandite in the microflotation column in two set of experiments. Therefore, the goal was to avoid the pentlandite oxidation as it negatively impacts the nickel flotation performance (the impact of oxidation for various sulfide minerals has been previously studied) and makes it difficult to ascertain the reason for the difference in flotation performanceeither oxidation or better CNC dispersion. − Potassium amyl xanthate collector (300 g/t of ore) and methyl isobutyl carbinol frother (20 mg/L) were then added with conditioning times of 4 and 2 min, respectively. The pH was readjusted to 10 before introducing the air into the cell.…”

Section: Methodsmentioning

confidence: 99%

Cellulose Nanocrystals’ Role in Critical Mineral Beneficiation: Dual Aggregate-Dispersant Behavior Supports Environmentally Benign Nickel Processing

Khan

Shoaib

Molaei

et al. 2023

ACS Sustainable Chem. Eng.

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Environmentally unsustainable and toxic chemical flocculants and dispersants from nickel (Ni) processing contribute to industrial effluents that greatly impact biodiversity and aquatic life. Despite the industry’s efforts to reduce its ecological footprintprimarily due to the lack of commercially available biodegradable, environmentally benign, and nontoxic reagentsthese reagents continue to harm natural ecosystems. Chemicals used during the processing operations often target a specific unit operation that negatively affects downstream operations. Herein, we discover the concentration-dependent behavior of cellulose nanocrystals (CNCs) as a dispersant and flocculant, avoiding the use of various harmful chemicals in the nickel processing stages. Electrophoretic, optical brightfield microscopy, and quartz crystal microbalance-dissipation studies detected charge neutralization behavior by renewable and biodegradable CNCs, which can greatly benefit Ni processing operations. Microflotation experiments demonstrated that CNCs enhanced Ni recovery from 62 to 77 wt % and concentrate grade from 15 to 20 wt %. Settling and turbidity studies demonstrated the dual flocculant-dispersant behavior of CNCs resulting from the alignment of CNC fibers along the octahedral brucite basal and amphoteric edge plane of serpentine. CNCs can be used as dispersants during froth flotation to improve Ni beneficiation and as postprocessing flocculants for tailings management and dewatering, which is one of the major environmental and social concerns facing the mining and mineral processing industry. In addition, this study paves the way for CNCs to be used as flocculants and dispersants in a range of industries from healthcare to pharmaceuticals to semiconductor devices.

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Section: Methodsmentioning

confidence: 99%

Cellulose Nanocrystals’ Role in Critical Mineral Beneficiation: Dual Aggregate-Dispersant Behavior Supports Environmentally Benign Nickel Processing

Khan

Shoaib

Molaei

et al. 2023

ACS Sustainable Chem. Eng.

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“…However, their selectivity may be low when dealing with low-grade Cu/Ni sulfide ores of complicated nature or fine dissemination (He and Liu, 2006;Ma and Liu, 2005;Peng et al, 2011). Although some hydrophobic talc and chlorite could be removed without the use of depressant owing to its physical in nature, it could lead to the loss of copper (over 10%) and nickel (over 5%) (Dong et al, 2003;Feng and Tang, 2011;Li, 1998;Liu et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Influence of depressant foenum-graecum on the flotation of a sulfide ore which contains hydrophobic gangue

Zhao

Wang

et al. 2015

International Journal of Mineral Processing

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Recycling of Nickel-Slag Tailings into Liquid Products: A Case Study using Slag from the Southern Urals Nickel Plant

Veselovsky

2021

Metallurgist

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Pentlandite oxidation in the flotation of a complex nickel ore in saline water

Cited by 11 publications

References 5 publications

Cellulose Nanocrystals’ Role in Critical Mineral Beneficiation: Dual Aggregate-Dispersant Behavior Supports Environmentally Benign Nickel Processing

Cellulose Nanocrystals’ Role in Critical Mineral Beneficiation: Dual Aggregate-Dispersant Behavior Supports Environmentally Benign Nickel Processing

Influence of depressant foenum-graecum on the flotation of a sulfide ore which contains hydrophobic gangue

Recycling of Nickel-Slag Tailings into Liquid Products: A Case Study using Slag from the Southern Urals Nickel Plant

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