Dissolution of starch and its role in the flotation separation of quartz from hematite

Yang, Siyuan; Li, Chao; Wang, Liguang

doi:10.1016/j.powtec.2017.07.061

Cited by 60 publications

(19 citation statements)

References 40 publications

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“…This was due to the fact that QT acts as a depressant of carbonates and fluorite when high doses are used ( Figures 6 and 7). PS has a behavior similar to QT in terms of SPG but with less notoriety due to its lower energy as a carbonate depressor [15]. Otherwise high doses of SS reach a minimum, around 8% of silica concentrate in the froth phase, due to the effect of SS as a silica depressant [36].…”

Section: Silica Purity Grade (Spg)mentioning

confidence: 99%

“…On the other hand, WD and SS are the reagents whose variation influenced the FPG the least. The fact that WD did not have a considerable effect was due to the effect of PS [15,16]. PS, being a carbonate flocculant, inhibits the effect of WD as a dispersant due to the concentrations of PS used compared to WD.…”

Section: Fluorite Purity Grade (Fpg)mentioning

confidence: 99%

“…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]. Reagents such as starch are particularly effective for reducing common gangue constituents in fluorspar ores [15]. When slime coatings are present in the flotation process, dispersants as sodium silicate have an important role upgrading the depressant action [16].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Silica Purity Grade (Spg)mentioning

confidence: 99%

Section: Fluorite Purity Grade (Fpg)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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“…MIBC dosage and the particle size were selected based on the preliminary tests. Corn starch is widely preferred in flotation of metallic ores due to its good depressant properties and their low cost [3,19,20]. The dosages of corn starch were between 500 -10000 g/ton.…”

Section: Reverse Flotation Testsmentioning

confidence: 99%

Effective Processing of Specularite Ore by Wet Magnetic Separation and Reverse Flotation Techniques

Al-Dhubaibi

Vapur

Top

2019

Hittite J. Sci. Eng.

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I n recent years, the world steelmaking industry has been significantly developed. This led to a rapid increase in iron ore production and demand [1]. Iron, which is one of the most useful elements in the world, has plentiful mineral forms. The primary industrial types of iron minerals include oxides and hydroxides and carbonates. Magnetite [Fe 3 O 4 ], hematite [Fe 2 O 3 ], goethite [FeO (OH)], limonite [FeOOH×nH 2 O] and siderite [FeCO 3 ] are the most common iron minerals [2]. Most of the iron ores in the world are in the form either hematite (Fe 2 O 3) or magnetite (Fe 3 O 4) [3]. Gravity and magnetic separation methods are basic ore processing techniques for obtaining the iron concentrates [4]. Wet low and high intensity magnetic separation methods are appropriate methods to process these ores with high iron content and a high degree Article History:

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“…Since then, numerous reports have focused on this topic. Yang et al [12] attempted to inhibit hematite floatability with corn starch, aiming to disclose the effect of starch solubility on the flocculation-flotation separation of quartz and hematite. The inhibition test showed that corn starch adsorbed on hematite surfaces and then impaired the floatability of hematite.…”

Section: Introductionmentioning

confidence: 99%

Selective Flocculation Separation of Fine Hematite from Quartz Using a Novel Grafted Copolymer Flocculant

et al. 2018

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Beneficiation of ultrafine mineral particles (typically with an average size less than 20 µm) remains a critical problem for the mineral processing industry. Selective flocculation technique has been found to show great potential to tackle this problem, whose success mainly depends on the selective adsorption of a flocculant on the target mineral particles. In this work, a novel copolymer flocculant was synthesized by grafting starch and acrylamide, which for the first time, was employed in the flocculation separation of fine hematite from quartz. The composites of the grafted copolymer flocculant (GCF) were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The single mineral flocculation results showed that at the pH of 10-11 and GCF concentration of 125 mg/L, hematite flocs with a compact texture were formed, whose average diameter and fractal dimension reached 36 µm and 2.02, respectively; while quartz flocs were barely observed, and the average diameter of particles stayed at approximately 20 µm. Furthermore, the selective flocculation separation was confirmed in the mixed mineral flocculation. From adsorption tests and zeta potential measurements, it is shown that GCF tended to adsorb more selectively and intensely on hematite surfaces compared with quartz. This study provides a valuable reference for the efficient recovery of fine hematite particles.

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Dissolution of starch and its role in the flotation separation of quartz from hematite

Cited by 60 publications

References 40 publications

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

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

Effective Processing of Specularite Ore by Wet Magnetic Separation and Reverse Flotation Techniques

Selective Flocculation Separation of Fine Hematite from Quartz Using a Novel Grafted Copolymer Flocculant

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