The flotation experiments were conducted in a RK/FD single-slot flotation machine with a 0.5 L cell and the impeller speed was 1900 ± 5 rpm. DDA-HCL was used as a collector for gangue particles with a dosage of 4000 g/t. First, dextrin was used as a depressant with a dosage of 1000, 2000, 3000, 4000, and 5000 g/t.

In this study, the effect of kerosene and sodium oleate (NaOL) on inducing hydrophobic agglomeration flotation of fine cassiterite was investigated through the micro-flotation tests, particle size distribution and morphological analysis, zeta potential and contact angle measurements. The results indicated that adding kerosene before NaOL …

This study not only enhances the understanding of how typical repulsive forces work in film drainage dynamics but also opens up an avenue for enhancing …

Ge [10] proved that flotation effect of flotation column was greater than flotation machine, yet the reagent consumption was large. Wu et al. [11] used diesel and DL-2-Octanol as collector and frother, respectively, and adopted a separation process of "one roughing and two cleanings" to obtain a concentrate with a yield of 11.06% and an …

The flotation recovery of fine particles faces serious challenges due to the lack of kinetic energy required for supporting their radial displacement and attachment with bubbles. Generally, the hydrodynamic resistance and repulsive disjoining pressure successively inhibit the liquid outflow intervening between the bubble and solid surfaces. …

An overview of existing flotation equipment based on energy consumption and particle size 3.1. Fine Flotation In this section, technological and conceptual advances in FFS are briefly introduced.

In this study, citric acid was used as a dispersant to improve the flotation performance of hematite fines. The effect and mechanism of citric acid on the reverse flotation of hematite fines were investigated by flotation tests, sedimentation experiments, scanning electron microscopy (SEM), zeta-potential measurements, and X-ray …

The flotation process was divided into five stages and continued for 300 s. Five flotation concentrate products were consecutively collected after 30, 60, 120, 180 s, and 300 s, respectively, during the flotation process. Flotation concentrates and tailings were filtered, dried at 80 °C and weighed for ash analysis. 2.2.2.

The flotation recovery of fine particles faces serious challenges due to the lack of kinetic energy required for supporting their radial displacement and attachment with bubbles. Generally, the hydrodynamic resistance and repulsive disjoining pressure successively inhibit the liquid outflow intervening between the bubble and solid surfaces.

The flotation separation of fine minerals, including rutile, has long been a challenging research focus. This study selected rutile and garnet samples with size fractions of −15, −38, and −74 μm to investigate the impact of particle size on flotation separation. Infrared spectroscopy, Zeta potential analysis, adsorption capacity ...

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This paper presents an overview on ultrasonic-assisted flotation process of fine coal, including cavitation bubbles, reagent emulsification, coal pretreatment (surface cleaning, physical breakage and chemical process), and simultaneous ultrasonic flotation (using ultrasonic probe or bath). The positive effects of ultrasonic-assisted flotation ...

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In this research, the effect of bubble size distribution on the performance of column flotation of fine particles of apatite was investigated. The Brazilian apatite ore sample used in this study was low grade (18.38% P 2 O 5 content) with a Sauter mean diameter of 13.95 μm. Bubbles were measured in a system consisting of a high-speed …

This study not only enhances the understanding of how typical repulsive forces work in film drainage dynamics but also opens up an avenue for enhancing …

An electro-flotation method was studied with fine scheelite and fluorite particles sized into three different fractions. Experiments were performed in a modified Hallimond tube. We investigated the effects of gas holdup, particle size, and different mesh electrode apertures on mineral recovery. Flotation results show that two size fractions ...

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A theory of combined micro flotation is proposed which reasonably accurately describes the. kinetics of fine particles flotation utilising small quantities of fi ne bubbles in combination with ...

The floc-flotation of molybdenite fines closely correlated with the strength of mechanical conditioning in hydrophobic agglomeration. A high flotability could be achieved by applying a high-speed stirring with a short time. 3. Kerosene played an important role in the floc-flotation of molybdenite fines.

This study investigated the effect of Fe3+ on the sulfidization flotation of oxidized digenite fine particles using sodium butyl xanthate (SBX) as a collector. The results of microflotation experiments show that the flotation rate and recovery of oxidized digenite fine particles can be improved by adding Na2S and SBX, whereas the existence of ...

Malachite fines are easily produced in the grinding process, leading to low malachite flotation recovery. Floc-flotation of malachite fines with an octyl hydroxamate and kerosene mixture was studied to improve the flotation recovery, using microflotation, microscopy image observations, contact angle measurements, and Extended …

To overcome the difficulties in flotation of fine particles, several flotation technologies, which intend to increase bubble–particle collision efficiency by either decreasing bubble size or increasing particle size, have been developed.

The PGMs were found to be mostly locked in silicate minerals or on the grain boundaries of silicates and BMS. Following liberation by comminution, froth flotation is the primary process for mineral separation. Typically, a 1–5% reduction in mass of the original ore flotation feed is attained in this step [12].

Improve fine rutile flotation by micro-nano bubble pretreatment. Nano-bubbles exist in the cracks of fine rutile particles. Micro-nano bubbles increase the hydrophobicity of the rutile. Micro-nano bubble can reduce the dosage of collector in fine rutile flotation. High speed camera was used to observe and prove.

ABSTRACT Literature shows that flotation is highly size dependent and processing both coarse and fine size fractions is problematic. The latter is the subject of the current paper. Fine particles have a relatively high surface area, and therefore more reagents are needed for their processing. In addition, the problem of fine particle …

Fine particles have a relatively high surface area, and therefore more reagents are needed for their processing. In addition, the problem of fine particle flotation is mainly due to their low collision and attachment efficiencies with bubbles. Several strategies are proposed in the literature to overcome the problems of fine particle …

In the past few decades, microbubble flotation has been widely studied in the separation and beneficiation of fine minerals. Compared with conventional flotation, microbubble flotation has obvious advantages, such as high grade and recovery and low consumption of flotation reagents. This work systematically reviews the latest advances …

The hydrophobic flocculation of jamesonite fines in aqueous suspensions induced by ammonium dibutyl dithiophosphate was investigated using laser particle size analysis, microscope analysis, electrophoretic light scattering and infrared spectroscopy. Single minerals of 4.607 μm for the 50% volumetric diameters were …

An effective strategy to overcome the problems of fine-particle flotation is to decrease the bubble size and use special types of flotation cells known as reactor …

There is a vast amount of literature on fine particles flotation using micro- and nanobubbles, intensified flotation machines, and different chemical reagents, …