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A study of flotation characteristics of monazite, hematite, …

The flotation recovery of monazite, hematite, and quartz increased with increasing dosage of AH. However, the difference in recovery of monazite and hematite …

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Effect of Solid Concentration and Particle Size on the Flotation

Despite the importance of solid concentration in froth flotation, its effect on flotation kinetics and entrainment has rarely been studied. In this study, the flotation kinetics and entrainment in quartz and hematite single-mineral flotation systems as a function of the solid concentration and particle size were investigated using …

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FLOTATION OF QUARTZ AND HEMATITE: ADSORPTION …

The single mineral flotation tests in the presence of anionic collectors, quartz does not respond to flotation but the C12 amine flotation of quartz was observed to be pH and concentration dependent. It was observed that hematite flotation recovery is maximum at acidic pH with sodium dodecyl sulphate (SDS), neutral pH with oleate, and …

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Adsorption mechanism of mixed anionic/cationic

The flotation performances of muscovite and quartz had been studied using DDA, NaOL and mixed NaOL/DDA with various molar ratios. Fig. 1 shows flotation recoveries of muscovite and quartz as a function of pH in the presence of different collectors. It can be seen that with an increase of pH from 2 to 11, the recovery of …

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The flotation of fine hematite by selective flocculation using sodium

The flotation tests found that the flotation recovery of fine hematite increased observably to 94.51% from 68.69% by adding 4 mg/L PAAS before NaOL at pulp pH 7.3; in the separation of mixed hematite and quartz, the separation efficiencies of fine hematite with and without the addition of the PAAS are 85.71% and 68.84%, respectively.

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Dissolution of starch and its role in the flotation separation …

Micro-flotation experiments were carried out to investigate the role of starch solubility in the flotation separation of quartz from hematite. Prior to flotation, starch solution was prepared at a fixed pH of 13 with varying temperature or at a fixed temperature of 65 °C with changing pH.

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Effect and mechanism of siderite on reverse flotation of hematite

The effects of siderite on reverse flotation of hematite were investigated using micro flotation, adsorption tests, and Fourier transform infrared spectroscopy. The flotation results show that interactions between siderite and quartz are the main reasons that siderite significantly influences the floatability. The interactions are attributed to …

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Investigations on the reverse flotation of quartz from hematite …

The flotation results of single minerals revealed that the reagents scheme of CMCS/DDA could be used in the reverse flotation of quartz from hematite. The flotation tests of mixed hematite and quartz in the mass ratio of 4:1 were carried out in the presence of 60 mg/L collector and 12 mg/L depressant at pH 8.

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The flotation of magmatic sulfides transfers Cu-Au from …

The efficient extraction of Cu and Au occurs through the segregation of sulfide liquids coupled with sulfide flotation, transporting these elements from magmas to the …

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Efficient separation of quartz from hematite for a novel …

The flotation performances of hematite and quartz using LPDC as collector were studied, and the results are shown in Fig. 3 (a)-(c). Download: Download high-res image (261KB) Download: Download full-size image; Fig. 3. Flotation recovery of quartz and hematite as function of pulp pH (a), LPDC concentration (b) and starch concentration (c).

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Application and Mechanism of Mixed Anionic/Cationic …

In order to enhance the reverse flotation effect of hematite, dodecyl trimethyl ammonium chloride (DTAC) and a mixed anionic/cationic collector of DTAC and tall oil were selected for flotation studies on quartz and hematite. Surface tension tests, FT-IR, XPS analysis, and molecular dynamics (MD) simulations were also conducted in …

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The molecular structure effects of starches and starch …

Native starches and their phosphates with various molecular structures was introduced as the depressant to realize the flotation of quartz from hematite in this study. The present starch phosphates (WSP, NSP, GSP) were modified by the reaction between phosphate and three different corn starches (WS, NS, G50). The synthesis and …

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Separation of ultra-fine hematite and quartz particles using

In this study, asynchronous flocculation was introduced in the flotation separation of ultra-fine hematite and quartz. Starch and PEO were used as selective …

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Curdlan as a new depressant of hematite for quartz-hematite …

Micro-flotation results showed that curdlan was used as an effective depressant for quartz-hematite reverse flotation separation. In artificial mixed ore tests, …

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Interaction of a hydrophobic bacterium strain in a hematite–quartz …

Recent literature has showed the potentiality of microorganisms as a flotation reagent.In the present study, a non-pathogenic hydrophobic bacterium (Rhodococcus opacus) has been investigated as a flotation reagent for the hematite–quartz system.The studies were based on electrophoretic mobility and …

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Ultrasonic treatment improves the performance of starch as …

Batch flotation of hematite and quartz mixture using CS or MS as depressant was conducted in a XFD 0.5 L laboratory flotation cell. For each test, 25 g hematite together with 25 g quartz were added to the cell which was then filled with DI …

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Adsorption Mechanism of Mixed Cationic/Anionic Collectors in Quartz

Maximum hematite floatation recovery was observed at acidic pH with sulfate, neutral pH with oleate, and at basic pH about 9.5 with C 12 amine. Accelerated adsorption of cationic collector in the presence of anionic collector apart from its own co-adsorption was observed in flotation results with quartz and hematite.

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Coordination reaction triggered xanthan gum and Fe(III) self …

The cation reverse flotation is a widely used method in improving the grade of iron ore concentrate, but hematite depressant is the key. In this work, the flotation behavior of hematite and quartz using the complex of Fe(III) and xanthan gum (Fe(III)-XG) as depressant was investigated via micro-flotation tests.

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Molecular arrangement of starch, Ca2+ and oleate ions in …

Based on the negative effects caused by siderite in the reverse flotation of hematite, different molecular arrangement and adsorption behaviors of flotation reagents on siderite, hematite and quartz were investigated by molecular simulations in order that the mechanism of depressant, activator and collector would be clearly understood and …

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Investigations on the Reverse Flotation of …

The traditional hematite depressant starch has the disadvantages of poor solubility and high viscosity. In this study, a novel hematite depressant, pullulan, with better performance and flotation …

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Effects of the calcite on quartz flotation using the reagent scheme …

Previous references showed that the reverse flotation of quartz from hematite can be achieved using corn starch as the depressant and DDA as the collector [10,11]. However, in most cases, hematite ores also contain a little amount of calcite (CaCO 3 ), and the calcite slimed easily during the grinding process because it has low …

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Selective separation mechanism of hematite from quartz by …

Reverse flotation desilication with anionic collector sodium oleate (OL) and activator Ca 2+ is a common beneficiation method to purify hematite. Herein, the separation mechanism of hematite and quartz were systematically investigated by experiments and DFT calculations with the effect of surface hydroxylation fully considered.

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Flotation recovery of rare earth oxides from hematite–quartz …

The challenge of monazite flotation selectivity from hematite–quartz mixtures was aggravated by quartz surface activation by soluble cations from hematite and monazite resulting in the entrained recovery of quartz. In order to depress hematite and quartz, sodium silicate and starch were tested. Both depressants produced desirable …

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Effect of butanol on flotation separation of quartz from hematite …

The cation reverse flotation is a widely used method in improving the grade of iron ore concentrate, but hematite depressant is the key. In this work, the flotation behavior of hematite and quartz using the complex of Fe(III) and xanthan gum (Fe(III)-XG) as depressant was investigated via micro-flotation tests.

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Effect and mechanism of siderite on reverse anionic flotation of quartz

Reverse flotation technology is one of the most efficient ways to improve the quality and reduce impurity of iron concentrate. Mineral processors dealing with hematite face a challenge that the flotation results of reverse flotation of hematite are poor in presence of siderite using fatty acid as collector, starch as depressant of iron minerals …

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The depressant-free flotation separation of Cu/Zn sulfide …

FTIR, zeta-potential and XPS explored that DEHTT chemisorbed the Cu sites of chalcopyrite surface through its S or O atoms. The specific flotation affinity of DEHTT …

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Investigations on the Reverse Flotation of Quartz/Hematite …

The traditional hematite depressant starch has the disadvantages of poor solubility and high viscosity. In this study, a novel hematite depressant, pullulan, with better performance and flotation effect than starch was found. The structure, molecular weight and viscosity of pullulan were determined for its characterization. The results of flotation …

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A study of flotation characteristics of monazite, hematite, and quartz

Hematite flotation recoveries were higher than that of monazite at pH 3, 5, and 11. However, it can also be observed that the collecting ability ofon quartz mineral was poor, with quartz recovery decreasing with increase in pH. ... The floatability of monazite was generally higher than that of hematite. The flotation recovery of quartz is ...

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Separation of ultra-fine hematite and quartz particles using

In this study, an asynchronous flocculation method was explored in the flotation separation of mixtures of ultra-fine hematite (d 50 = 7.2 µm) and ultra-fine quartz (d 50 = 1.6 µm) using polyethylene oxide (PEO) and starch as the flocculant of quartz and hematite, respectively. Dodecylamine acetate was used as a collector for quartz in the ...

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Investigation into starch adsorption on hematite and quartz …

The optimum flotation pH for hematite and quartz was firstly determined. Flotation tests for hematite and quartz were carried out at a dodecylamine dosage of 30 mg/L without the addition of starch. Fig. 5 shows that the flotation recoveries of both minerals first increased and then decreased over pH. The maximum recoveries of …

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