Effect of Al (III) Ions on the Separation of Cassiterite and Clinochlore Through Reverse Flotation

Chen, Yumeng; Xiong, Tao; Feng, Dongxia; Xie, Xian

doi:10.3390/min8080347

Cited by 12 publications

(8 citation statements)

References 36 publications

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“…But it seems to be beneficial to upgrade the concentrate in the presence of Ca 2+ ions because an upward trend on the grade of iron was observed with increasing its concentration. This is inconsistent with the previous research [7,12], indicating that floatability of silica has little change in the presence of sodium chloride, while the promotive adsorption of an anionic collector on quartz can be harvested by increasing the concentration and valency of cation [7][8][9][10]12]. In terms of the accumulative content of the main cations as shown in Table 3, an obvious build-up of TFe n+ , Ca 2+ or Mg 2+ ions either in the concentrate or tailing water after the closed-circuit flotation test occurs, which may contribute to the increase in the content of SiO 2 and the drop in the grade of Fe in concentrates from Figure 2.…”

Section: Flotation Performance Of Iron Oxides In the Presence Of Cationscontrasting

confidence: 76%

“…This could bring an unexpected change into the physicochemical/electrochemical atmosphere of flotation pulp, affecting mineral floatability as well as dewatering and pumping [3]. Table 1 shows the positive or negative effects of ions, especially cations, Ca 2+ , Mg 2+ , Fe 3+ , Al 3+ , K + , Na + etc., in the reverse/direct flotation of iron oxides [4][5][6][7][8][9][10][11][12][13]. It seems to be complicated to figure out specific effects of these cations on the effectiveness of flotation since they may be detrimental in some cases [5,11,13], while in other cases they may be beneficial to the flotation process [4,[7][8][9][10]12].…”

Section: Introductionmentioning

confidence: 99%

“…But it is closely related to the properties of minerals floated, type of flotation reagents, especially collector, and valence/concentration of cations as well. Since the promotive effects of these cations mainly occur in the anionic reverse flotation of iron oxides [4,[7][8][9][10] while the competitive effects of them obviously take place in the cationic reverse flotation or anionic direct flotation [5,11,13]. And either promotive or Polymer (i) Promotive adsorption with an increase of concentration and valency strength; (ii) Little effect by NaCl.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Cations/Anions in Recycled Tailing Water on Cationic Reverse Flotation of Iron Oxides

Tang

Wen

2019

Minerals

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It is well known that reverse flotation performance of iron oxides is affected by water quality. Since many potential variations among water sources recycling in a mineral processing plant bring unpredictable effects on the flotation system of iron oxides: disturbing ions/compounds, pH, hardness, residual reagents, etc. In this study, the recycled tailing water from a local plant, characteristically constituting of Ca2+, Mg2+, Na+, K+, Al3+, Fe3+, Cl−, SO42− etc., was introduced into the cationic reverse flotation process of an iron ore. A series of bench flotation tests using iron ores, micro-flotation tests using pure fine quartz, water chemical analyses, and zeta potential measurement were conducted with the objective of identifying the possible influences of both cations and anions in the recycled tailing water on the flotation performance. The flotation results pointed out that the cation with higher valency had more severe influences on the recovery of iron oxides. The formation of the pH-dependent surface complexes on mineral surfaces, for example, Fe(OH)+, Fe(OH)2+, and Fe(OH)3 resulted from Fe3+ ions adsorption, contributed to the less negative zeta potentials of the quartz, and consequently weakened its interaction with the amine collector. It is worthy to note that SO42− ions seem to have a more positive effect on the recovery of iron oxides than Cl− ions. This is probably attributed to the formation of inner/outer- sphere surface complexes on the iron oxides, inhibiting the dissolution of the iron ions/species, and the coordination with these cations from the recycled tailing water, shielding their disturbances in the flotation.

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Section: Flotation Performance Of Iron Oxides In the Presence Of Cationscontrasting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Cations/Anions in Recycled Tailing Water on Cationic Reverse Flotation of Iron Oxides

Tang

Wen

2019

Minerals

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“…The disturbances of metal ions at different valences/concentrations in flotation have been extensively investigated in the literature (Fuerstenau et al, 1963;Fuerstenau and Palmer, 1976;Nevasaia, et al, 1998;Chen et al, 2018;Ruan et al, 2018). The cations at higher valences tend to have more significant influences on the flotation properties, regardless of type of flotation, anionic or cationic flotation.…”

Section: Introductionmentioning

confidence: 99%

Buffering of pulp pH and its influence on process water chemistry during iron ore flotation

Tang¹,

Xiao²

2021

Physicochem. Probl. Miner. Process.

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It is inevitable for the occurrences of pulp pH buffering during pH control in flotation as the minerals with acidic/alkali properties tend to interact with pH modifiers and restore the pulp pH. This could result in some disturbing ions and alter the water/pulp chemistry. The purpose of this study was to identify the influences of pulp pH buffering on process water chemistry through a series of pH buffering tests, bench flotation experiments, ore dissolution tests, zeta potential measurement, and Xray diffraction (XRD) analysis. The built-up and distribution of the dominant cations in the process water from different locations in an industrial flotation system of the iron ore were analyzed and recorded by Inductively Coupled Plasma-Optical Emission (ICP-OES) at a period of about six months when the operations were stable. The data showed that a near five-minute buffer of pulp pH at a range from near 7.9 to 8.9 occurred before it reached a stable value. At this period, the dissolution of Ca/Mg from the iron ore was dominant. And, the pulp pH at a lower value tended to induce more dissolved Ca 2+ and Mg 2+ ions. These divalent cations seem to have different influences on the flotation properties of iron oxides at the same concentrations, indicating a positive effect on the recovery of iron oxides with the presence of Mg 2+ ions but an opposite effect if Ca 2+ ions occurred. The presence of sulfate, however, tended to restore the floatability of silicate depressed by Ca 2+ ions.

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“…As the main source of tin, tin-bearing minerals include stokesite (CaSnSi 3 O 9 •2H 2 O), cassiterite (SnO 2 ), stannite (Cu 2 FeSnS 4 ), nordenskioldine (CaSnB 2 O 6 ), and so on [4][5][6]. Among them, the theoretical tin content in cassiterite is the highest, reaching 78.77% [7]. Cassiterite is an important tin oxide mineral, which is a raw material for extracting tin and making tin alloys [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Flotation Separation of Cassiterite from Calcite Using Metal-Inorganic Complex Depressant

Zhao

Zhu

2021

Minerals

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At present, the research on flotation separation of cassiterite and gangue minerals is mainly focused on the development of new collectors or depressants, while the research on combined depressants is rare. In this study, the flotation separation of cassiterite and the typical gangue mineral, calcite, was investigated using the metal-inorganic complex depressant AlSS, composed of aluminum sulfate (Al2(SO4)3) and water glass (Na2SiO3·4H2O). The flotation results indicated that, with the assistance of Al3+, the inhibition effect of SS (water glass) on calcite is significantly enhanced, while the inhibition effect on cassiterite is almost unchanged. The zeta potential and adsorption measurements proved that the formation of the negatively charged colloidal particles composed of Alm(OH)n3m−n and SiOm(OH)n4−2m−n tended to adsorb on the positively charged calcite surface, inhibiting the adsorption of sodium oleate (NaOL), while the adsorption of the colloidal particles on the negatively charged cassiterite surface is relatively less. The contact angle measurements indicate that the contact angle of cassiterite in the NaOL + AlSS solution is obviously larger than that of calcite, which indicates that cassiterite has better floatability in this system. The X-ray photoelectron spectroscopy (XPS) analysis confirms the Al and Si species are adsorbed on the surface of calcite, but not on the cassiterite. In addition, the adsorption of AlSS on cassiterite and calcite changes the chemical environment on the calcite surface, indicating that the adsorption of AlSS on the mineral surface is more inclined to be through a chemical reaction.

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Effect of Al (III) Ions on the Separation of Cassiterite and Clinochlore Through Reverse Flotation

Cited by 12 publications

References 36 publications

Effects of Cations/Anions in Recycled Tailing Water on Cationic Reverse Flotation of Iron Oxides

Effects of Cations/Anions in Recycled Tailing Water on Cationic Reverse Flotation of Iron Oxides

Buffering of pulp pH and its influence on process water chemistry during iron ore flotation

Enhanced Flotation Separation of Cassiterite from Calcite Using Metal-Inorganic Complex Depressant

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