Investigation of nanobubble enhanced reverse anionic flotation …

Hematite is commonly upgraded in China using a reverse anionic flotation process with starch as depressant for hematite, Ca 2+ as activator and fatty acids as collector for quartz. The Anshan type of hematite is well known for its low grade, fine dissemination, difficulty in upgrading, and huge reserve in China.

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 the …

Effect and mechanism of siderite on reverse flotation of …

Flotation based on the surface-chemistry theory serves as the primary method for recovering hematite. Reverse flota-tion is the main process due to its higher separation effi-ciency and …

Mechanistic insights into stepwise activation of malachite for

Malachite is a common copper oxide mineral that is often enriched using the sulfidization–xanthate flotation method. Currently, the direct sulfidization method cannot yield copper concentrate products. Therefore, a new sulfidization flotation process was developed to promote the efficient recovery of malachite. In this study, Cu2+ was used as an activator to …

Flotation behavior and separation mechanism of quartz …

for quartz, 6.45 for hematite and 6.97 for magnetite. The best α-BLA concentrations was 75 mg/dm3 for quartz flotation, 125 mg/dm3 for hematite and magnetite flotation. The activator CaCl 2 had little effect on the flotation of hematite and magnetite, but the minimum dosage 50 mg/dm3 of activator CaCl 2 was necessary for quartz flotation.

Study on the effect and mechanism of coarse magnetite on the flotation

Under the condition of no activator, oleic acid has almost no collecting ability to quartz. Therefore, the effect of activator on quartz flotation was tested under the condition of oleic acid of 125 mg/L, and the optimum condition of CaO was 30 mg/L. ... The difficulty of micro-fine hematite flotation lies in the small particle momentum and the ...

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. Flotation results showed …

Application of Quantum Chemistry in the Study of Flotation …

Flotation reagents are chemicals used in the mineral flotation process that can modify mineral surface properties and improve or reduce the hydrophobicity of minerals, and thereby, the pulp properties and froth stability are more conducive to the separation of minerals [3,4,5,6,7].They are usually divided into the activator, collector, depressant, frother, pH …

Innovative utilization of acid mine drainage (AMD): A …

@article{Bai2021InnovativeUO, title={Innovative utilization of acid mine drainage (AMD): A promising activator for pyrite flotation once depressed in a high alkali solution (HAS)–Gearing towards a cleaner production concept of copper sulfide ore}, author={Shaojun Bai and Yun-xiao Bi and Jie Li and Pan Yu and Zhan Ding and Chao Lv and Shuming ...

Selective flocculation of hematite in the hematite-quartz …

In conducting a flocculation experiment, one gram of quartz was placed into a 250 cm 3 beaker with 50 cm 3 of the activator solution and then stirred for 5 min, after which 50 cm 3 of polymer solution was added from a slow- 267 running burette. ... but strongly adsorb on hematite. Similar to flotation with f a t t y acid collectors, quartz can ...

Activation Mechanism of Lead Ions in Perovskite Flotation …

The activation mechanism of lead ions (Pb2+) in perovskite flotation with an octyl hydroxamic acid collector was systematically investigated using microflotation experiments, zeta-potential measurements, adsorption tests, Fourier transform infrared (FT-IR) analysis, and X-ray photoelectron spectroscopy (XPS) analysis. The results of microflotation experiments and …

Application and Mechanism of Mixed …

In this study, the monomineral flotation tests of hematite, quartz, and their artificially mixed minerals proved that the mixed DTAC/tall oil collector could improve the flotation separation of quartz from hematite.

Enhanced Flotation Separation of Iron and Silicon with …

Froth flotation is a selective process used to separate different components in ores based on their hydrophobicity, where hydrophobic particles attach to bubbles and concentrate in the froth phase, while hydrophilic particles remain in the slurry phase [].Reverse flotation is a key process for the purification of iron concentrate after magnetic separation [2,3,4].

A study of selective flotation recovery of rare earth oxides …

Semantic Scholar extracted view of "A study of selective flotation recovery of rare earth oxides from hematite and quartz using hydroxamic acid as a collector" by G. Abaka-Wood et al. ... of monazite from silicate-rich tailings with fatty acids collectors using a lanthanum salt as a selective phosphate activator. Anthony Geneyton L. Filippov T ...

Effect of particle size on flotation performance of …

the reverse flotation, hematite is depressed with the help of starch, and the silicate minerals (such as quartz) are floated by using calcium ion as activator of quartz and fatty acid as collector under strong alkaline conditions (Kar et al., 2013; Shrimali et al., 2018; Shrimali et al.,2016b). ...

Study on the effect and mechanism of coarse magnetite on …

In this paper, the carrier flotation method is used to comprehensively recover hematite, and the addition of coarse-grained magnetite can effectively improve the recovery rate of fine-grained …

Modeling and simulation of flotation reagents system in …

In addition, an activator such as calcium oxide is used to activate selectively the quartz by changing its surface charge into positive. Then an anionic collector like commercial …

A review of reagents applied to rare-earth mineral flotation

Hematite: 7–9: Abaka-Wood et al. ... The purpose of the other surfactant tested is detailed by d for depressant and a for activator. Table 8. Summary of bastnӓsite and monazite ore flotation studies using hydroxamate collectors. ... Flotation using any of these collectors has not been extensively applied or tested in any industrial setting ...

Effect of sodium alginate on reverse flotation of hematite …

Given the gradual increase in the chlorite content of hematite ores, pulp properties seriously deteriorate during flotation. The traditional anion reverse flotation of hematite cannot effectively eliminate the effects of chlorite, leading to a significant decrease in the total Fe (TFe) grade of the concentrate. In this work, the effect of sodium alginate on the reverse flotation of …

Study on the Dispersion Mechanism of Citric Acid on …

(activator), sodium hydroxide and hydrochloric acid (pH adjusters) were analytically p ure, and the . ... Synthesized hematite micro-flotation test results ( Fig. 1) show that its floatability is ...

Study on the Enhanced Desalinization of Hematite Reverse …

Single-mineral flotation tests were conducted to investigate the effects of pH, collector dosage, activator dosage, and temperature on the flotation of quartz and hematite in the KDB and …

Effect and mechanism of siderite on reverse flotation of …

Effect and mechanism of siderite on reverse flotation of hematite Wan-zhong Yin1,2), Dong Li1), Xi-mei Luo3), Jin Yao1), and Qian-yu Sun1) ... lector and an activator for quartz, respectively. Starch was used for the depressant of iron minerals (hematite and siderite). It is shown that the floatability of quartz and iron

Study on Dynamic Behavior and Mechanism of Reverse Flotation …

In order to enhance control of hematite reverse flotation systems, we investigated desiliconization mechanism of surface nanobubbles (NBs) in reverse flotation of micro-fine hematite (MFH). The reverse flotation mechanism of NBs enhancing MFH was studied based on flotation dynamics tests, adsorption dynamics, adsorption dynamics calculations, and zeta …

Statistical analysis and optimization of reverse anionic hematite …

In this study reverse flotation experiments statistically designed using Box-Behnken method were carried out with a mechanical flotation cell integrated with nanobubbles and the results were analyzed according to response surface methodology to evaluate the effects and interactions of three independent critical process parameters, i.e., dosages ...

The flotation of fine hematite by selective

This paper studies in a detailed manner the selective flocculation and flotation of fine hematite with the PAAS to separate the fine hematite from quartz using NaOL as the …

Use of Pb2+ as a Selective Activator in Selective Flotation …

Despite being one of the main sources of iron, specularite is often associated with gangue minerals such as aegirine and chlorite. Flotation separation is challenging in the mineral processing industry because of the similar surface properties of specularite, aegirine, and chlorite. This study investigates the role and selective activation mechanism of Pb2+ in the flotation …

FLOTATION CHEMISTRY OF HEMATITE/OLEATE SYSTEM

Currently beneficiation of hematite ores is conducted using either direct flotation (hematite flotation) or indirect flotation (quartz flotation) tech-niques depending upon the nature of the …

Reverse flotation separation of hematite from quartz …

Researchers have tried to improve flotation of fine hematite particles by enlarging their apparent sizes through aggregation, carrier flotation, selective flocculation, and hydrophobic (shear) flocculation (Qiu et al., 1993, Shibata and Fuerstenau, 2003, Forbes, 2011).For example, Guo (2003) demonstrated that fine hematite can be recovered from fine-grained hematite ore …

Surface characteristics and flotation behaviours of …

Therefore, finding an economic and effective activator to improve the recovery of specularite is an important research direction. In this study, lead nitrate as an activator was found and confirmed to improve the floatability of specularite. ... Flocculation/flotation of hematite fines with anionic temperature-responsive polymer acting as a ...