The Effect of New Modified Fatty Acid (CY-23) Collector on Chlorite/Hematite Separation

Wen-li, Jiang; Zhou, Yunshan; Zhang, Yimin

doi:10.1155/2018/5380480

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…The difference between the floatability properties of natural and synthetic hematite was reported in some investigations. [19,[34][35][36][37][38][39] It has been demonstrated that in addition to the significant difference between the IEP of the synthetic and natural hematites, there are some other important differences (e.g., mineralogy, surface hydration, aging, crystal structure) which affect their surface properties and subsequent floatability. [40] Synthesized hematite micro-flotation test results (Fig.…”

Section: Hematitementioning

confidence: 99%

A comparative study between the adsorption mechanisms of sodium co-silicate and conventional depressants for the reverse anionic hematite flotation

Tohry

Dehghan

Hatefi

et al. 2021

Separation Science and Technology

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Starch, dextrin, sodium silicate (SS), and recently sodium co-silicate (SCS) are the most known depressants for the depression of iron oxides through the traditional reverse flotation. However, all these depressants' adsorption mechanisms on the surface of iron oxides and their main associated minerals (silicate and phosphates) through the reverse anionic flotation did not yet been thoroughly investigated. For filling this gap, as a comparative investigation, this study implemented Fourier Transform Infrared Spectroscopy (FTIR), zeta potential measurement, and micro-flotation tests to determine the adsorption mechanisms of these depressants and explored their effects on the floatabilities of pure hematite, quartz, and fluorapatite. Micro-flotation test results illustrated that all the examined depressants could depress hematite in the presence of an anionic collector. Still, the efficiencies of SS and SCS were higher than those of starch and dextrin. SCS had the lowest depression effect on quartz, and fluorapatite floatability compared to other depressants. Surface analyses depicted that dextrin and starch decreased the collector adsorption on the fluorapatite surface, where SCS and SS had a negligible effect on its floatability. The co-existence of physical and chemical bonds created between dextrin/starch and fluorapatite was the reason for its depression through the anionic reverse flotation.

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Section: Hematitementioning

confidence: 99%

A comparative study between the adsorption mechanisms of sodium co-silicate and conventional depressants for the reverse anionic hematite flotation

Tohry

Dehghan

Hatefi

et al. 2021

Separation Science and Technology

View full text Add to dashboard Cite

show abstract

“…Based on the type of gangue, iron ore can be classified into three major types: quartz-type, carbonate-type, and silicate-type [3][4][5][6]. The difficulty of quartz-type iron ore separation via flotation is relatively low, and extensive studies have been conducted that mainly focus on the flotation separation of quartz-type oxide iron ore or the novel reagent synthesis and adsorption mechanism [7][8][9][10][11][12]. However, silicate-type iron ore, especially the iron-containing silicate-type iron ores, such as aegirite, chlorite, grunerite, garnet, etc., is difficult to separate due to the similar magnetic and floatability properties between iron-containing silicate and oxidized iron ore [13].…”

Section: Introductionmentioning

confidence: 99%

Surface Properties and Floatability Comparison of Aegirite and Specularite by Density Functional Theory Study and Experiment

Gao

et al. 2019

Minerals

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Understanding the differences in surface properties between aegirite and specularite is of great significance to study their separation. In this work, the surface properties of aegirite and specularite, as well as their relationships to floatability, have been explored by first principle calculation, flotation, and Zeta potential measurement. The surface relaxation indicated that the specularite (001) surface appeared to show more surface reconstruction. The unsatisfied bond properties, Mulliken bond population, and surface charge showed that the floatability of specularite was superior to that of aegirite. The flotation results showed that the hydrophobicity of specularite was higher than that of aegirite with dodecylamine (DDA) as the collector. It is infeasible to separate specularite from aegirite by flotation using starch as the depressant, and research of effective reagents with high affinity to the element Si is the subclinical breakthrough point of specularite/aegirite separation.Minerals 2019, 9, 782 2 of 15 flotation with amines. They also found that starch was not a selective depressant for magnetite in the process of the reverse cationic flotation of iron ores when iron-containing silicates as amphiboles are present in the flotation system [8]. Carboxymethyl cellulose, an effective depressant for iron oxide, was also found to be a depressant for chlorite [14].The novel high-efficiency depressants or collectors are considered to be an effective method to solve the unsatisfactory separation problems [15,16]. These depressants and collectors are targeted for making a sufficient hydrophilic and hydrophobic state of the mineral and gangue surface, respectively. Therefore, they are profoundly inseparable from understanding the surface properties of the minerals in the novel depressant or collector molecule design and their adsorption mechanism on the mineral surface.In recent years, with the rapid developments of theoretical and computational chemistry, a density functional theory (DFT) calculation can be adopted to visually investigate the surface properties and floatability of minerals and to predict possible novel reagents [4,17]. The wettability of the mineral surface and its regulation have always been the core issues of the flotation process [18][19][20]. Thus, further research of the nature of the cleavage surface, especially of the main cleavage surface, is of great significance for investigating the floatability of the minerals. For example, Han et al. [21] calculated the surface properties of the hemimorphite (110) surface and the simthsointe (101) surface by the first-principle calculation method to investigate their relationships to the mineral floatability, which implied that hemimorphite (110) surface is more readily wetted by water, while the O atoms on hemimorphite (110) surface are more impeding of collector molecules. He et al. [22] calculated the properties of spodumene and revealed that the O atoms in spodumene are the most active, while the Li atoms are inactive, so an activator is nece...

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The Effect of New Modified Fatty Acid (CY-23) Collector on Chlorite/Hematite Separation

Cited by 2 publications

References 9 publications

A comparative study between the adsorption mechanisms of sodium co-silicate and conventional depressants for the reverse anionic hematite flotation

A comparative study between the adsorption mechanisms of sodium co-silicate and conventional depressants for the reverse anionic hematite flotation

Surface Properties and Floatability Comparison of Aegirite and Specularite by Density Functional Theory Study and Experiment

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