A Review on Floc-Flotation of Fine Particles: Technological Aspects, Mechanisms, and Future Perspectives

Asgari, Kaveh; Khoshdast, Hamid; Nakhaei, Fardis; Garmsiri, Mohammad Reza; Huang, Qingqing; Hassanzadeh, Ahmad

doi:10.1080/08827508.2023.2236770

Cited by 14 publications

(8 citation statements)

References 265 publications

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Section: Interpretation Of Metallurgical Responsesmentioning

confidence: 99%

“…Also, the coating effect of fine copper particles on the surface of silica particles increases their flotation rate and while the amount of these particles in the concentrate, the recovery of copper and iron decreases. • Fine particles may increase the suspension of coarse particles by intensifying the viscosity of the pulp and thus enhance the recovery of silica particles by entrainment(Paryad et al, 2017;Hoseinian et al, 2019a and2020;Asgari et al, 2023).According to Fig.3c, although the molybdenum grade has not increased significantly, the recovery using CT has grown significantly. In the molybdenum processing plant, a small amount of diesel oil is used to improve molybdenite flotation separation.…”

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confidence: 99%

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Effect of different process water sources on rougher flotation efficiency of a copper ore: A case study at Sarcheshmeh Copper Complex (Iran)

Soufiabadi,

Dehghan,

Nejadaria

et al. 2024

Physicochem. Probl. Miner. Process.

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In this research, the effect of different sources of process water on the flotation efficiency of copper sulfide ore prepared from the Sarcheshmeh copper mine was investigated. For this purpose, samples of fresh water to the plant, overflows of copper-molybdenum concentrate thickener, copper concentrate thickener, and recycled water pool as well as a mixture of fresh water and recycled water were prepared and characterized. Flotation tests were performed under the same conditions as the plant’s rougher circuit and were kept constant during all experiments. Grade and recovery of copper, iron, molybdenum, and silica were selected as the metallurgical response of flotation tests. The results were subjected to statistical analysis to assess the relative significance of which water source affects the flotation performance as evaluated from the experimental results. The results showed that the copper concentrate thickener overflow had the greatest effect on the flotation efficiency, so the grade and recovery decreased by about 10% and 75% for copper, and 10% and 6% for iron in the concentrate, respectively, while the grade and recovery increased up to 0.1% and 12% for silica, and 3% and 25% for molybdenum, respectively. The reason for this effect was attributed to the high content of suspended solid particles, and Cu2+, Mo2+, and Fe2+ cations in this water source that increased the coating effect over gangue minerals and entrainment rate. The improvement of molybdenum flotation was also ascribed to the possible presence of residual diesel oil from the flotation process in the plant. Due to the relatively equal amount in all sources of process water, the effect of anions and ions of dissolved salts was difficult.

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Section: Interpretation Of Metallurgical Responsesmentioning

confidence: 99%

mentioning

confidence: 99%

Effect of different process water sources on rougher flotation efficiency of a copper ore: A case study at Sarcheshmeh Copper Complex (Iran)

Soufiabadi,

Dehghan,

Nejadaria

et al. 2024

Physicochem. Probl. Miner. Process.

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“…6, the performance of the frother at high concentrations of the collector is greatly reduced. This phenomenon can be attributed to the interaction of collector and frother molecules in the aqueous phase, which has been studied in detail in various references (e.g., Khoshdast et al, 2022;Asgari et al, 2023).…”

Section: Effect Of Operating Variables On Copper Gradementioning

confidence: 99%

Metallurgical evaluation of copper ore flotation performance in the presence of Rhamnolipid biosurfactant produced from Pseudomonas aeruginosa. Part 1: Copper-bearing minerals

Biniaz,

Khoshdast,

Garmsiri

et al. 2024

Physicochem. Probl. Miner. Process.

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The present research work studies the effect of rhamnolipid biosurfactant (RL) produced from Pseudomonas aeruginosa bacteria on metallurgical response of a copper ore sample flotation through an extensive full factorial experimental design. Key influential factors including feed particle size, pulp solid content, pH, and dosages of collector, frother and RL biosurfactant were considered. The surface activity of RL biosurfactant was also studied based on D-optimal experimental design. Surface activity results revealed that increasing pH and electrolyte concentrations negatively impacted the RL surface activity, while the effect of electrolyte source was dependent on their ionic strength. Metallurgical investigations showed that operating parameters significantly influence the copper grade and recovery with considerable interaction among various parameters. RL biosurfactant was found to negatively decrease the copper grade and positively enhanced the recovery. Effect of RL was attributed to two potential mechanisms, i.e., being ineffective on copper minerals and/or interaction with gangue minerals, as well as increasing the rate of entrainment due to high foamability, both of which increase non-selective recovery of gangue minerals. Interestingly, regardless of the structural similarities, there wasn’t observed any interaction between the flotation reagents and rhamnolipid. Fourier-transform infrared (FTIR) spectroscopic analysis of copper minerals, both pure and RL-exposed, showed that there is actually no molecular interaction between RL molecules and particle surface.

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“…For over 100 years, much effort has been invested in studies and tests for various ways to solve this problem [7]; however, so far, a universal solution has not been put forward. For example, one of the methods proposed involves increasing the particle size by aggregating them through the use of selective flocculants [8][9][10][11]. The second method has suggested to place small particles on larger carrier particles [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…For example, one of the methods proposed involves increasing the particle size by aggregating them through the use of selective flocculants [8][9][10][11]. The second method has suggested to place small particles on larger carrier particles [11][12][13][14][15]. Another proposed approach involves the application of bubbles that have a size that is comparable to or not significantly larger than the size of the particles [16,17].…”

Section: Introductionmentioning

confidence: 99%

Limitations of the Nano-Bubbles Application for Beneficiation of Fine and Ultrafine Particle Flotation

Rulyov

2024

J Miner Sci Materials

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The flotation of small particles is one of the considerable global challenges facing the mineral raw materials processing industry today. In the recent 10 years, the effects of cavitation Nanobubbles (NB) on the efficiency of selective flotation of fine and ultrafine mineral particles have been explored in several experimental studies. Since the findings obtained in these studies are inconsistent and contradictory, there has been a need for a theoretical assessment of the potential of the above approach for practical applications in the area of poor fine-disseminated ores beneficiation. Application of the kinetic laws, describing the behavior of dispersed systems in a turbulent flow, has allowed establishing that, similar to flocculants, NB could bind hydrophobic particles into large aggregates and thus increase the efficiency of their capture by conventional coarse bubbles in flotation. It has been demonstrated that the optimal volumetric dose of NB per unit mass of particles could be calculated by the formula 2 b pp f dd = ρ , where db is NB size, and dp and ρp – respectively are the size and density of particles. Based on the real data, the optimal numerical concentration of NB was calculated, and the established value was found to be in the range (108 -109 ) mL/L. The essential factor that limits practical applications of NB resides both in the low productivity of the known methods of NB generation and in the engineering difficulties of producing NB in sufficient quantities directly in the pulp. The last, but not the least important limiting factor is that the low concentration of small particles of valuable mineral in real pulps leads to very slow growth of such aggregates since the turbulence level in the flotation machines is almost by two orders of magnitude lower than the level required.

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A Review on Floc-Flotation of Fine Particles: Technological Aspects, Mechanisms, and Future Perspectives

Cited by 14 publications

References 265 publications

Effect of different process water sources on rougher flotation efficiency of a copper ore: A case study at Sarcheshmeh Copper Complex (Iran)

Effect of different process water sources on rougher flotation efficiency of a copper ore: A case study at Sarcheshmeh Copper Complex (Iran)

Metallurgical evaluation of copper ore flotation performance in the presence of Rhamnolipid biosurfactant produced from Pseudomonas aeruginosa. Part 1: Copper-bearing minerals

Limitations of the Nano-Bubbles Application for Beneficiation of Fine and Ultrafine Particle Flotation

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