Flotation of fluorite from ores by using acidized water glass as depressant

Zhou, Wenbo; Moreno, Josue; Torres, Roberto C. Carrillo; Valle, Héctor Del; Song, Shaoxian

doi:10.1016/j.mineng.2013.02.017

Cited by 93 publications

(28 citation statements)

References 10 publications

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“…The results show that the grade of Mn increases from 14.2% to 18.1% with an increase in sodium silicate concentration up to 1000 g/t, but the grade and recovery decrease with the further increase in sodium silicate concentration. This may be attributed to the depression of rhodochrosite, due to the reducing pulp potential values [21]. According to these findings, it can be concluded that the appropriate concentration of depressant for the flotation should be around 1000 g/t.…”

Section: Effect Of Temperaturementioning

confidence: 87%

The flotation of low-grade manganese ore using a novel linoleate hydroxamic acid

Zhou

Chen

Yan

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Section: Effect Of Temperaturementioning

confidence: 87%

The flotation of low-grade manganese ore using a novel linoleate hydroxamic acid

Zhou

Chen

Yan

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Figure 4 shows the results of FESEM-EDX analysis of FSPA. As it can be seen in Figure 4, the EDX spectra reveal the presence of calcium, fluorine, and carbon (Ca = 52.12 wt%, F = 43.80 wt%, and C = 4.08 wt%), which indicate that the sample consists of CaF 2 , and little of CaCO 3 may be residual [18]. In addition, Si is not detected in the sample which suggests the quartz had been removed completely.…”

Section: Fesem-edx Characterizationmentioning

confidence: 96%

The Improvement Effect of Dispersant in Fluorite Flotation: Determination by the Analysis of XRD and FESEM-EDX

Sun

Zhou

et al. 2015

Journal of Spectroscopy

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Different dispersants were added in the dispersion process to improve the efficiency of fluorite flotation. The types and dosage of dispersant on the improvement of fluorite flotation were investigated; when the sodium polyacrylate (SPA) was used as the dispersant and its addition is 0.5%, the concentrate grade of CaF 2 increased from 90% to 98% and the fluorite recovery increased from 81% to 85%. Methods of X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), and Energy dispersive X-ray spectrometer (EDX) were used to characterize the sample. According to the analysis of results, the optimal sample consisted of CaF 2 and very little CaCO 3 in the size range of 0-5 m. It could be concluded that the mechanism of improvement for the concentrate grade and recovery of CaF 2 was attributed to the change of potential energy barrier which caused the separation of particles with different charge. All results indicate that SPA has a great potential to be an efficient and cost-effective dispersant for the improvement of fluorite flotation.

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“…Depressants in fluorite flotation, which are used for decreasing the floatability of calcite and silica, mainly include some inorganic salts. Sodium silicate commonly known as water glass and its solution with inorganic salt ions, are often applied in fluorite flotation to depress silica [12,13]. Otherwise, tannins are presented as strong depressants of the carbonated gangue, in this way quebracho tree stands out as especially energetic tannin in the calcium carbonate depression [14].…”

Section: Introductionmentioning

confidence: 99%

Optimal Depressants and Collector Dosage in Fluorite Flotation Process Based on DoE Methodology

et al. 2019

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Alternative processes have been proposed for selective separation of fluorite and gangue minerals (carbonates and silicates) present in fluorspar ores. Calcination and gravity separation processes are methods that have low efficiency and high cost. Flotation is a chemical process that becomes important when high ore grades are required; however, the selectivity is inhibited by the superficial similarity of the chemical composition of minerals. Accordingly, interactions between dissolved ionic species of fluorite, carbonates, and silicates with some reagents under determinate conditions obstruct the flotation process. In order to optimize the flotation process of a Spanish fluorite ore, this research uses a mathematical model. In this study, the variables were the dose of potato starch, quebracho tree, white dextrine, oleic acid, and sodium silicate. On the other hand, the factors studied were the law of carbonates, silica, and fluorite, in addition to the metallurgical recovery of fluorite. The statistical technique of factor analysis that relates the variables and factors allowed to the optimization of the reagent dosage. Maximum metallurgical recovery was achieved without sacrificing the fluorite grade. The mathematical model adjusts satisfactorily to the results with a correlation coefficient of 91.58% for metallurgical recovery and 98.51% for fluorite grade. Optimizing the process 60.45% of metallurgical recovery and 68.99% of fluorite grade are achieve in the roughing step, using a dosage of 1.68 g·kg−1 of potato starch, 0.86 g·kg−1 of quebracho tree, 1.25 g·kg−1 of dextrin, 3 g·kg−1 of oleic acid, and 0.85 g·kg−1 of water glass.

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Flotation of fluorite from ores by using acidized water glass as depressant

Cited by 93 publications

References 10 publications

The flotation of low-grade manganese ore using a novel linoleate hydroxamic acid

The flotation of low-grade manganese ore using a novel linoleate hydroxamic acid

The Improvement Effect of Dispersant in Fluorite Flotation: Determination by the Analysis of XRD and FESEM-EDX

Optimal Depressants and Collector Dosage in Fluorite Flotation Process Based on DoE Methodology

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