Selective Separation of Fluorite, Barite and Calcite with Valonea Extract and Sodium Fluosilicate as Depressants

Ren, Zijie; Yu, Futao; Gao, Huimin; Chen, Zhijie; Peng, Yongjun; Liu, Lingyun

doi:10.3390/min7020024

Cited by 49 publications

(18 citation statements)

References 11 publications

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“…However, selective problem arises between cassiterite and clinochlore with NaOL as a collector 54 because of its low selective performance. Therefore, it is crucial that an effective depressant is 55 employed to achieve selective separation [25][26][27][28]. There are several studies founding that Al (III) ions 56 can act as a depressant on cassiterite flotation.…”

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confidence: 99%

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

et al. 2018

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Most hydrophobic clay minerals, such as clinochlore, are known to cause problems in the recovery of cassiterite. In this study, a new reagent scheme, i.e., sodium oleate (NaOL) as a collector and Al (III) ions as a depressant, for reverse flotation separation of cassiterite and clinochlore was investigated. The flotation performance and interaction mechanism were studied by microflotation tests, adsorption tests, contact angle measurements, and X-ray photoelectron spectroscopy (XPS) analysis. Results of single mineral flotation experiments showed that NaOL had a different flotation performance on cassiterite and clinochlore, and the addition of Al (III) ions could selectively inhibit the floatability of cassiterite. Reverse flotation tests performed on mixed minerals indicated that the separation of cassiterite and clinochlore could be achieved in the presence of NaOL and Al (III) ions. Adsorption experiments demonstrated that Al (III) ions hindered the adsorption of NaOL on cassiterite surfaces but exerted little influence on the adsorption of NaOL on clinochlore surfaces. Results of contact angle measurements indicated that Al (III) ions could impede the hydrophobization process of cassiterite in NaOL solution. XPS results showed that aluminum species were adsorbed onto the cassiterite surfaces through the interaction with O sites.

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confidence: 99%

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

et al. 2018

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“…The mineralogical and chemical analysis results depicted in Table 2 and Figure 1 indicate that for ore A to be upgraded, quartz and calcite minerals are to be separated from the fluorite during flotation. Tannins have been shown to be strong calcite depressants [6,7], while sodium silicate is reported to be an effective silica depressant [8,9]. In terms of liberation characteristics at a grind of 80% passing 150 µm, 90% of the fluorite grains were fully liberated, with less than 15% of fluorite grains showing an intimate association with calcite and other silicate gangue minerals.…”

Section: Flowsheet For Ore Amentioning

confidence: 99%

“…Apart from the proper selection of depressants, high-temperature pulp treatment has also been shown to improve the selectivity in fluorite flotation [2][3][4]. There is therefore a need to come up with customised flowsheets and efficient optimised reagent regimes for improved selectivity and reduced energy costs in fluorite flotation [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

The Role of Gangue Mineralogy on Flowsheet Development in Fluorite Processing

2020

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Fluorite, CaF2, is considered a strategically important mineral as it is a raw material for many strategic industries. Froth flotation is reported to be the most efficient and economically viable process for the production of an acid-grade product with a CaF2 content of at least 97%. Selective flotation of fluorite from gangue minerals, e.g., calcite and barite, is challenging because these minerals have similar physicochemical properties. This study employed batch flotation tests coupled with mineralogical analysis to design suitable customised flowsheets and efficiently optimised reagent regimes for optimum production of acid-grade fluorite concentrate from two different fluorite ores by the froth flotation process. The effect of pulp temperature on fluorite flotation was investigated in this study with the objective of lowering pulp temperatures in fluorite flotation. The results showed that an acid-grade CaF2 concentrate could be obtained from the flotation of both ores at ambient pulp temperatures. This eliminates the requirement for high-temperature pulp treatment, which would result in a significant reduction in thermal energy costs. This study showed that an understanding of gangue mineralogy is key to process optimisation for acid-grade CaF2 production. Although an acid-grade CaF2 concentrate could be produced from both ores, the flowsheets and reagent regimes were markedly different. For instance, the production of an acid-grade CaF2 product from a high quartz and calcite ore was achieved by employing a simple rougher–multiple cleaner flotation circuit using tannin and sodium silicate as calcite and quartz depressants, respectively. On the other hand, the production of an acid-grade CaF2 product from the flotation of the pyritic ore required a pre-sulphide flotation stage for upfront sulphur removal and the use of a sulphide depressant. Multiple stages of cleaning were required for improved selectivity in the flotation of both ores.

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“…The DFT-D correction was adopted. The atomic positions were optimized using the Perdew-Burke-Ernzerhof solids (PBESOL) algorithm [34]. The threshold values for the convergence criteria were 0.0001 nm for maximum displacement, 0.3 eV/nm for maximum force, 0.05 GPa for maximum stress, 1.0 × 10 −5 eV/atom for energy and 1.0 × 10 −6 eV/atom for self-consistent field tolerance.…”

Section: Molecular Simulationmentioning

confidence: 99%

Separation Mechanism of Fatty Acids from Waste Cooking Oil and Its Flotation Performance in Iron Ore Desiliconization

et al. 2017

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Using the mixed fatty acids (MFA) produced by waste cooking oil as flotation collectors directly, the flotation effect is usually not satisfactory, especially at lower temperature, which may be due to the presence of large amounts of saturated fatty acids. In this study, waste cooking oil was separated into saturated fatty acids (SFA) and unsaturated fatty acids (UFA). The separation mechanism was studied by molecular simulation based on quantum and molecular mechanics. SFA and UFA were analyzed by iodine value, melting point measurement and Fourier transform infrared (FT-IR) spectroscopy to check the result of the separation. The micro-flotation and bench-scale flotation tests were performed to investigate the flotation differences between SFA and UFA. The results showed that the poor flotation performance of waste cooking oil was due to the large amount of SFA in presence. If the SFA was separated out, the TFe grade and recovery of the flotation concentrates would be increased by 4.09 and 2.70 percentage points, respectively and the SiO 2 grade would be 4.03 percentage points lower at the same time. This study would provide technical supports and theoretical guidance for the waste cooking oil application in the field of mineral processing.

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Selective Separation of Fluorite, Barite and Calcite with Valonea Extract and Sodium Fluosilicate as Depressants

Cited by 49 publications

References 11 publications

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

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

The Role of Gangue Mineralogy on Flowsheet Development in Fluorite Processing

Separation Mechanism of Fatty Acids from Waste Cooking Oil and Its Flotation Performance in Iron Ore Desiliconization

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