Investigating froth stability: A comparative study of ionic strength and frother dosage

Corin, K.C.; Wiese, J.G.

doi:10.1016/j.mineng.2014.03.001

Cited by 43 publications

(30 citation statements)

References 19 publications

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“…The metallurgical properties are sensitive to the stability of the bubbles in the froth phase. Stable froths may be used to achieve a higher recovery or yield (Botsaris and Glazman, 1989;Corin and Wiese, 2014). As a consequence the selectivity of the froth phase may be lowered.…”

Section: Considerations For Flotation Practicementioning

confidence: 99%

Characterisation of frother properties in coal preparation process water

Bournival

Muin

Lambert

et al. 2017

Minerals Engineering

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Section: Considerations For Flotation Practicementioning

confidence: 99%

Characterisation of frother properties in coal preparation process water

Bournival

Muin

Lambert

et al. 2017

Minerals Engineering

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“…It is acknowledged that water should be considered as a reagent in flotation and, as such, the quality of process water becomes an important factor to consider as it may alter the pulp chemistry and thereby affect the flotation (Corin et al, 2011;Corin and Wiese, 2014). Previous work considered specific ions present in process water and their effects on the flotation of a Cu-Ni-PGM ore (Manono et al, 2016).…”

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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“…Solids and water recovery is not directly affected by flotation reagents, but is affected by the changes in froth stability brought by reagent addition [27]. In practice, the recovery of solid and water to the concentrate is usually used to represent the effect of flotation agents on the properties of froth behavior [17,28].…”

Section: Introductionmentioning

confidence: 99%

Effect of H2O2 on the Separation of Mo-Bi-Containing Ore by Flotation

Lin

Sun

et al. 2018

Minerals

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Hydrogen peroxide (H2O2) is a strong oxidizer that causes non-selective oxidation of sulfide minerals, and its influence on bismuth sulfide ores is not well-documented. In this study, H2O2 was proposed as an alternative bismuthinite depressant, and its effect on a Mo-Bi-containing ore was intensively investigated by batch flotation tests. Results showed that the addition of H2O2 significantly destabilized the froth phase, thus decreasing the solids and water recovery. The recovery of bismuth in molybdenum concentrate was dramatically decreased to 4.64% by H2O2 compared with that in the absence of H2O2 (i.e., 50.14%). The modified first-order kinetic model demonstrated that the flotation rate of molybdenite slightly declined after H2O2 addition, whereas that of bismuthinite was drastically reduced from 0.30 min−1 to 0.08 min−1 under the same condition. Simulation revealed that H2O2 affected the floatability of both molybdenite and bismuthinite but resulted in more detrimental effect to bismuthinite. Hence, H2O2 has the potential to act as an effective depressant in bismuth sulfide ore flotation.

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Investigating froth stability: A comparative study of ionic strength and frother dosage

Cited by 43 publications

References 19 publications

Characterisation of frother properties in coal preparation process water

Characterisation of frother properties in coal preparation process water

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

Effect of H2O2 on the Separation of Mo-Bi-Containing Ore by Flotation

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