Literature review on the use of natural products in the flotation of iron oxide ores

Quast, Keith

doi:10.1016/j.mineng.2017.01.008

Cited by 42 publications

(9 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reverse flotation route can be classified into reverse cationic flotation and reverse anionic flotation, based on the collector type. The reverse anionic flotation (flotation of gangue minerals using anionic collectors that mainly include fatty acids) was developed in the early 1960s [14]. At present, reverse anionic flotation is mainly applied in China to upgrade iron ores [15][16][17].…”

Section: Elements Magnetite Concentrate Hematite Concentrate Detrimenmentioning

confidence: 99%

“…To date, several review papers [1,9,10,14,18,24,25] either discuss the collector-mineral interactions in a single flotation route or cover the collectors used in different iron ore flotation routes, but neglect the fundamental interactions between collectors and minerals. There are still no reviews dedicated to the interactions between collectors and minerals in different iron ore flotation routes.…”

Section: Elements Magnetite Concentrate Hematite Concentrate Detrimenmentioning

confidence: 99%

See 1 more Smart Citation

Collecting Agent–Mineral Interactions in the Reverse Flotation of Iron Ore: A Brief Review

et al. 2020

View full text Add to dashboard Cite

Froth flotation has been widely used in upgrading iron ores. Iron ore flotation can be performed in two technical routes: direct flotation of iron oxides and reverse flotation of gangue minerals with depression of iron oxides. Nowadays, reverse flotation is the most commonly used route in iron ore flotation. This review is focused on the reverse flotation of iron ores, consisting of reverse cationic flotation and reverse anionic flotation. It covers different types of collecting agents used in reverse iron ore flotation, the surface characteristics of minerals commonly present in iron ores (e.g., iron oxides, quartz, alumina-bearing minerals, phosphorus-bearing minerals, iron-bearing carbonates, and iron-bearing silicates), and the adsorption mechanisms of the collecting agents at the mineral surface. The implications of collecting agent–mineral interactions for improving iron ore flotation are discussed.

show abstract

Section: Elements Magnetite Concentrate Hematite Concentrate Detrimenmentioning

confidence: 99%

Section: Elements Magnetite Concentrate Hematite Concentrate Detrimenmentioning

confidence: 99%

Collecting Agent–Mineral Interactions in the Reverse Flotation of Iron Ore: A Brief Review

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Iron ore flotation started in 1931 via a direct anionic flotation route (Ma, 2012), and the reverse anionic flotation has been established for its higher economic performance in the early 1960s (Filippov et al, 2014;Veloso et al, 2018). Reverse anionic flotation is the most widely used flotation route, in which starch is added as a depressant for iron oxide particles, Ca 2+ as an activator, and anionic collector as a collector for quartz at a high pH value (Ma, 2012;Quast, 2017;Yang and Wand, 2018). At the high pH value of 11-12, the repulsive electrostatic forces with negative charge between iron oxide and quartz particles are strong enough to eliminate the heterocoagulation phenomenon between iron oxide and quartz particles.…”

Section: Introductionmentioning

confidence: 99%

Significance of reagents addition sequence on iron anionic reverse flotation and their adsorption characteristics using QCM-D

Hou¹,

Sobhy²,

Wang³

2020

Physicochem. Probl. Miner. Process.

View full text Add to dashboard Cite

To explore the influence of reagents addition sequence of the pH regulator and the starch depressant on the anionic reverse flotation of iron oxide, flotation conditional experiments were performed on mixed low-intensity and high-gradient magnetic concentrates which is the flotation feed acquired from the iron processing plant. Besides, quartz crystal micro-balance with dissipative (QCM-D) was conducted to detect the adsorption phenomena of the flotation reagent on iron oxide sensors at different addition orders. The outcomes showed that the flotation performance using the pH regulator prior to the depressant was the best. For example, at 1.6 kg/Mg starch dosage, the recovery and separation efficiencies were improved by 18.3% and 21.2%, respectively, with keeping the concentrate Fe grade as high as 69.5%. Also, QCM-D frequency shifted by -41 Hz from 17 Hz to -24 Hz with increased dissipation from -2.6 x 10 -6 to 8.2 x 10 -6 , indicating an increase in the mass of slightly-rigid starch adsorption layer on the surface of iron oxide under a strong alkaline condition with adsorption density of about 0.46 mg/cm 2 . On the other hand, under weak alkaline conditions, starch was adsorbed, and then the starch was desorbed upon the addition of the strong alkaline solution. Whereas, adding the pH modifier to create a strong alkaline condition enhanced the starch adsorption significantly with coordination and hydrogen bonds, and prevented the following adsorption of the anionic collector for more efficient reverse flotation of iron oxide minerals.

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

View full text Add to dashboard Cite

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...

show abstract

Literature review on the use of natural products in the flotation of iron oxide ores

Cited by 42 publications

References 25 publications

Collecting Agent–Mineral Interactions in the Reverse Flotation of Iron Ore: A Brief Review

Collecting Agent–Mineral Interactions in the Reverse Flotation of Iron Ore: A Brief Review

Significance of reagents addition sequence on iron anionic reverse flotation and their adsorption characteristics using QCM-D

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

Contact Info

Product

Resources

About