Several experimental studies are about the adsorption mechanism of amine surfactants on the quartz surface via UV spectrophotometry, infrared spectra (IR), X-ray photoelectron spectroscopy (XPS) and Zeta potential measurements, and so forth [10], [11], [12].Gaudin-Fuerstenau adsorption model [13] that the first layer has the same …Web

An open flotation circuit test obtains a flotation concentrate with a TiO 2 grade and recovery of 38.30% and 25.99%, respectively. A leaching exploration test shows that the TiO 2 grade of the flotation concentrate can be improved to 53.90%. XRD analyses reveal that the ilmenite in the VTM ore is converted into anatase and rutile during the ...Web

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 …Web

The flotation routes viable for use in iron ore concentration are direct flotation of iron oxides and reverse quartz flotation, either via the anionic route after surface activation or the cationic one (Araujo et al., 2005; Filippov et al., 2014). The reverse cationic flotation of quartz is the most widely utilized in the beneficiation ofWeb

Both experimental and modeling results in this paper provide valuable insight into the application of film flotation, HRXMT, and tenacity model for the detachment of real particles with different degrees of surface exposure. The film flotation technique is a valuable tool for measuring the tenacity of particles floating at an air–water interface.Web

In anionic reverse flotation, quartz was activated by polyvalent metal ions, ... Some researchers also found that the turbulence model can further improve the product purity and quartz recovery from the point of view of kinetics. Show abstract. As a mineral resource, due to its stable physical chemistry properties, quartz has a wide range of ...Web

In order to develop a semi-empirical model incorporating both particle size and density, Wang et al. conducted flotation tests with single minerals (fully liberated quartz, ilmenite, and hematite) in a 3.5-L laboratory mechanical flotation cell. Their results suggested that the degree of entrainment was a result of the balance between the drag ...Web

Hydroxylation models of quartz (1 ... Effects of alkyl ether amine and calcium ions on fine quartz flotation and its guidance for upgrading vanadium from stone coal. Powder Technol., 338 (2018), pp. 180-189, 10.1016/j.powtec.2018.07.026. View PDF View article View in Scopus Google ScholarWeb

However, it is interesting that these relatively low recovery values obtained in the Jameson cell flotation of quartz are still higher than the recoveries of the same coarse size fraction obtained by Robinson ... Modelling of negative bias column for coarse particle flotation. Minerals Engineering, 8 (1–2) (1995), pp. 91-100.Web

The flotation separation of magnetite and quartz is a long-term challenge for the beneficiation industry. For high-quartz magnetite, conventional flotation shows poor separation effect, resulting in the waste of resources and low flotation efficiency. In this paper, dodecylamine acts as a collector and Al(III) ions in water act as a depressant to …Web

We propose detailed microscale modelling of flotation processes by means of Density Functional Hydrodynamics (DFH), which is the direct 3D numerical modelling method for compositional flow with gas, liquid and solid phases taking into account viscosity, compressibility, interfacial tension, gravity, diffusion, and a range of …Web

The flotation behaviour of quartz particles was studied over the particle size range from 0.5 μm to 1000 μm and for advancing water contact angles between 0° and 83°. Flotation was performed ...Web

The most stable adsorption model was oleate-siderite (101) complex containing water molecular with almost all the oleate ions adsorbing on siderite. Among the three minerals, oleate ions bound strongly on siderite followed by hematite. Sodium oleate hardly adsorbed on quartz. As a result, flotation recovery of quartz remained zero.Web

The flotation routes viable for use in iron ore concentration are direct flotation of iron oxides and reverse quartz flotation, either via the anionic route after surface activation or the cationic one (Araujo et al., 2005 ... (floated and unfloated) were dried, filtered, and weighed in analytical balance model AUW220D/SHIMADZU (d=0.1 mg/0.01 ...Web

A scientific and rigorous study on the adsorption behavior and molecular mechanism of collector sodium oleate (NaOL) on a Ca2+-activated hydroxylated α-quartz surface was performed through experiments and density functional theory (DFT) simulations. The rarely reported hydroxylation behaviors of water molecules on the α-quartz (101) …Web

The flotation results showed that LS exerted high selectivity for hemimorphite, and flotation separation of hemimorphite from quartz was achieved at an LS concentration of 3.4 × 10 −4 mol/L and a pulp pH of 7. In contrast to sodium oleate (NaOL), LS exhibited a higher Gaudin's selectivity index (SI) of 67.58 under the optimal conditions ...Web

An ideal flotation method for quartz is preactivation with Ca 2+, followed by collection with OL. Herein, the effects of surface hydroxylation on the adsorption of the anionic collector OL on the quartz …Web

Mixed mineral flotation tests were carried out to assess the performance of the two ether amines on a model ore composed of magnetite (67%) plus quartz (33%), …Web

Abstract. Models of sodium oleate adsorption on siderite, hematite and quartz were investigated by molecular dynamic simulation, respectively. Surface energy was calculated to confirm the cleavage ...Web

Recovery of iron values from banded magnetite quartzite (BMQ) ore by direct and reverse flotation technique is presented. In direct flotation, with oleic acid as the collector, the iron grade in the concentrate that could be achieved is limited to 57% Fe from a feed containing ~ 47% Fe. The difficulty of concentrating iron values by direct flotation …Web

In this paper, the flotation experiments of the iron oxide feed were carried out using the uniform test design method at different flotation temperatures from 20 °C …Web

Molecular models for the quartz, ... The presence of the slimes (Ps < 10 µm) is harmful on the reverse flotation of quartz, so they are usually prior removed by hydrocyclones. The main effects of ...Web

Schematic model of a cationic gemini collector adsorption at the quartz surface. ... alcohol to ether diamine increased the quartz flotation recovery from 52 to 84% at pH 10. In addition,Web

This model and the complexation model proposed previously by Weisseborn et al. [8] on the hematite surface were refined by including the effect of the surface orientation on starch adsorption density, which decreased according to the cleavage planes of hematite (11 2 ¯ 0) > (1 1 ¯ 00) > (0001) [9]. Overall, the reverse cationic flotation of ...Web

Mixed mineral flotation tests were carried out to assess the performance of the two ether amines on a model ore composed of magnetite (67%) plus quartz (33%), resulting in a magnetite: quartz mass ...Web

Molecular modeling thus represents an elegant and rigorous quantitative methodology that could support the design of flotation reagents based on the crystal structure specificity of mineral-reagent interactions. ... the quartz content of 2-F-Qtz reaches 97.42% and the SiO 2 grade is 99.12% at a quartz flotation recovery of 70.20%.Web

In this context, Gungoren et al. showed that the positive effect of ultrasound on the quartz-amine flotation recovery was related to the temperature increase during conditioning. ... A multidimensional analysis and modelling of flotation process for selected Polish lithological copper ore types. E3S Web Conf. 2017, 18, 01005. [Google Scholar ...Web