Water quality – A comparative study between moncheite and pentlandite in mixture with pyroxene

Shackleton, N.J.; Malysiak, V.; Vaux, D. de; Plint, Neville

doi:10.1016/j.mineng.2012.02.004

Cited by 8 publications

(4 citation statements)

References 11 publications

(10 reference statements)

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“…Researchers have investigated numerous systems using a variety of techniques to improve the attachment of particles onto the bubbles [20][21][22][23][24][25][26][27][28][29]. For example, many previous studies have focused on imparting hydrophobicity to the surface because the hydrophobic surface of minerals favorably interacts with bubbles [2,[21][22][23][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the type and number of suitable collectors that can selectively recover the minerals have been investigated. Furthermore, other researchers have focused on the influence of electrolyte solutions as well as selective adsorption of collector on the mineral surface to regulate the interaction between the particles and bubbles [6,20,25,26,29]. The dissolved ions compress the electrical double layer (EDL) of the particles, which reduces the electrostatic repulsive force [6,33,34].…”

Section: Introductionmentioning

confidence: 99%

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Application of Depletion Attraction in Mineral Flotation: I. Theory

et al. 2018

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We investigate the role of depletion interactions in the particle–bubble interactions that determine the attachment capability of particles on the bubble surface in flotation. In this article, we propose a theoretical model that explains how this attractive interaction could enhance flotation efficiency. Two optimum conditions are determined for the concentration and molecular weight of the depletion agent. The optimum concentration can be determined through the extent of surface activity of the depletion agents. The magnitude of the depletion attraction increases as the concentration increases; however, an increase in the concentration simultaneously enhances its surface concentration. The bubble surface adsorption of the depletion agent results in polymer brushes on the bubble surface that produce a large repulsive interaction. In contrast, the optimal molecular weight of the depletion agents is given by the interaction between the depletion agent sizes, which is determined by its molecular weight and Debye length which is determined by the solution ionic strength. We demonstrate that exploiting this depletion interaction could significantly enhance the flotation efficiency and in principal could be used for any particle system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of Depletion Attraction in Mineral Flotation: I. Theory

et al. 2018

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“…Similarly, thiosulfate (S 2 O 3 2− ) anions, produced when sulfide minerals oxidize [17], compete with collector reagent adsorption on pentlandite [18]. Furthermore, trials with sodium chloride suggest that both cations and anions in the process water can affect pentlandite mineral surface alteration and floatability [19]. In conclusion, as water impurities can make pentlandite particles less hydrophobic and weaken collector reagent adsorption, they may eventually decrease the recovery of pentlandite.…”

Section: Introductionmentioning

confidence: 99%

Simulating the Impact of Ore and Water Quality on Flotation Recovery during the Life of a Mine

Aaltonen,

Izart,

Lyyra

et al. 2023

Minerals

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Blending of different ore types in the concentrator feed contributes significantly to maintaining a high recovery of valuable minerals with required grades in the concentrate. It is feasible to develop an ore-blending scheme over the life of a mine already in the design phase of the plant. In addition to ore characteristics, water quality is known to impact mineral recovery. A blending plan could also be developed for the different water streams of a future concentrator. This paper describes a novel modeling and simulation approach to predict metallurgical response combining ore types and water quality. The model is based on kinetic laboratory flotation test data, and it was tested on a case study. As a result, rougher flotation grade-recovery curves dependent on ore types and water quality are presented over the predicted life of the mine. The simulation results can be exploited in project design to maximize the recovery of valuable minerals and to ensure environmentally sound and profitable mining operations. Overall, the developed modeling tool can be applied widely for minerals processed by using froth flotation and water types available for kinetic laboratory flotation tests.

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“…Biçak et al (2012) concluded that dissolved metal ions and sulfide ions mainly in the form of SO 4 2− and S 2 O 3 2− alter the surface chemistry of minerals in the pulp phase. Ikumapayi et al (2012) also showed that galena was Shackleton et al (2012) investigated the water quality effects on moncheite-pyroxene and pentlanditepyroxene composites and proposed that ions found in process waters passivated the mineral surfaces and inhibited the collector adsorption, thereby reducing the floatability of moncheite, pentlandite, and pyroxene. Their findings also suggested that the specific ions in the process water played a far more significant role compared to the overall ionic strength of the process water.…”

Section: Introductionmentioning

confidence: 99%

The Behavior of Gangue During the Flotation of a Sulfidic PGM-Bearing Ore in Response to Various Monovalent and Divalent Ions in Process Water

2020

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Mineral concentrators are becoming increasingly aware of the importance of the quality of the water that they feed into their milling and flotation circuits. It is speculated that different inorganic constituents of process water may yield different flotation results owing to the electrolyte-reagent-mineral interactions occurring in the pulp phase. These interactions are said to be specific to ion type, reagent type, and mineral or ore type. It therefore stands to reason that there is a need to develop an understanding of the specific ion effects on both the pulp phase and the froth phase phenomena, such that the chemistry and the quality of process water can be monitored and controlled in a manner that does not negatively affect the flotation performance. Previous research has shown that inorganic electrolytes may impact the hydrophobicity and the floatability of mineral particles and could in turn affect froth stability, entrainment, and thus mineral grades and recoveries. In this study, the floatability of a Cu-Ni-PGM-bearing Merensky ore is tested on a bench-scale flotation system in various single salt solutions, viz., CaCl 2 , CaSO 4 , Ca(NO 3 ) 2 , MgCl 2 , Mg(NO 3 ) 2 , MgSO 4 , NaCl, NaNO 3 , and Na 2 SO 4 , in order to examine specific ion effects on gangue recovery. Coagulation and zeta potential tests are conducted in order to establish the nature of the impact that specific ions have on the behavior of gangue in flotation. The findings of this work have shown that single salt solutions containing NO − 3 ions resulted in a strong depression of gangue compared to those solutions containing Cl − and SO 4 2− ions. It was also shown that the divalent Ca 2+and Mg 2+ showed a stronger depression of gangue compared to the monovalent Na + . Ca 2+ , in comparison to Na + , resulted in an increase in the coagulation of the ore as well as an increase in the zeta potential of talc. Overall, the findings of this paper suggest that the presence of Ca 2+ and Mg 2+ in process water would most likely create conditions that promote gangue depression. Manono et al. The Behavior of Gangue in Process Water RESEARCH KEY HIGHLIGHTS -Solutions containing NO − 3 and Ca 2+ increased the depression of gangue as shown by lower gangue recoveries. -The concentrate grades were higher in solutions containing Ca 2+ and NO − 3 compared to those which contained Na + , Cl − , and SO 4 2− . -Ca 2+ and NO − 3 resulted in a less negative zeta potential compared to Na + and SO 4 2− . -Coagulation was enhanced in Ca 2+ -and NO − 3containing solutions. -Ca 2+ -containing process waters could be beneficial for floatable gangue depression.

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Water quality – A comparative study between moncheite and pentlandite in mixture with pyroxene

Cited by 8 publications

References 11 publications

Application of Depletion Attraction in Mineral Flotation: I. Theory

Application of Depletion Attraction in Mineral Flotation: I. Theory

Simulating the Impact of Ore and Water Quality on Flotation Recovery during the Life of a Mine

The Behavior of Gangue During the Flotation of a Sulfidic PGM-Bearing Ore in Response to Various Monovalent and Divalent Ions in Process Water

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