Zeta potential of air bubbles conditioned with typical froth flotation reagents

2015 ◽  
Vol 140 ◽  
pp. 50-57 ◽  
Author(s):  
Arturo Bueno-Tokunaga ◽  
Roberto Pérez-Garibay ◽  
Diego Martínez-Carrillo
Keyword(s):  
Zeta Potential ◽  
Froth Flotation ◽  
Air Bubbles ◽  
Flotation Reagents

scholarly journals Specific Ion Effects on the Behavior of Mixtures of Sodium Iso-Butyl Xanthate and Sodium Diethyl Dithiophosphate during the Flotation of a Cu-Ni-PGM Ore: Effects of CaCl2 and NaCl

2021 ◽  
Vol 6 (1) ◽  
pp. 22
Author(s):  
Malibongwe S. Manono ◽  
Katlego Matibidi ◽  
Kirsten C. Corin ◽  
Catherine K. Thubakgale ◽  
Iyiola O. Otunniyi ◽  
...  
Keyword(s):  
Froth Flotation ◽  
Monovalent Cation ◽  
Process Water ◽  
Polyvalent Cation ◽  
Flotation Reagents ◽  
Sulfide Flotation ◽  
Froth Stability ◽  
Ion Effects ◽  
The Relationship ◽  
Diethyl Dithiophosphate

Inorganic electrolytes present in the process water used during froth flotation may have both beneficial and detrimental effects. These effects are said to be ion specific, as some ions may result in enhanced froth stability, increased mineral recoveries and decreased concentrate grades, while others may bring the opposite effects. Onsite process water quality variations have intensified the need to understand the relationship between inorganic electrolytes and flotation reagents on flotation performance. The use of mixtures of thiol collectors in sulfide flotation is a common practice across the globe; however, very few investigations have considered these in process waters of varying compositions. This study considers the effect of common cations, Na+ and Ca2+, in process water on the behavior of mixtures of thiol collectors. Single-salt solutions of NaCl and CaCl2 at an ionic strength of 0.0213 mol·dm−3 were used to investigate the behavior of mixtures of two thiol collectors. These were carefully selected to understand how mixtures of thiol collectors behave in the presence of a monovalent cation versus a polyvalent cation. Bench-scale froth flotation tests were conducted using a Cu-Ni-PGM ore from the Merensky Reef. The results have shown that the divalent cation, Ca2+, resulted in higher %Cu and %Ni recoveries at all collector mixtures compared to the monovalent cation, Na+. The concentrate grades were, however, slightly compromised, as slightly more gangue reported to the concentrate in the presence of Ca2+. This behavior is attributed to the effect of polyvalent cations on bubble coalescence and froth stability.

scholarly journals Froth Production in Potable Water without Chemicals

2019 ◽  
Author(s):  
Ghanim Hassan ◽  
Robert G. J. Edyvean
Keyword(s):  
Drinking Water ◽  
Driving Force ◽  
Potable Water ◽  
Froth Flotation ◽  
Operating Parameters ◽  
Air Bubbles ◽  
Air Flow Rate ◽  
Pharmaceutical Industries ◽  
Solid Liquid ◽  
Solid Liquid Separation

Abstract. Froth flotation is a well-known solid-liquid separation technique. Hydrophobicity is the main driving force for such processes. Hydrophobic solids attach to air bubbles and rise up while hydrophilic or less hydrophobic species settle down. Froth can be produced with chemical frothers such as alcohols and polyglycols. However, the use of chemicals limits the use of this separation method in applications such as drinking water, food, and pharmaceutical industries. Therefore, developing a technique that produces froth without adding any chemicals would be useful to such industries. This work demonstrates that with suitable operating parameters a 27 cm froth height can be obtained in a 20 cm diameter column by using an air flow rate of 130 l/min.

scholarly journals Review of the Main Factors Affecting the Flotation of Phosphate Ores

Minerals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1109
Author(s):  
Manar Derhy ◽  
Yassine Taha ◽  
Rachid Hakkou ◽  
Mostafa Benzaazoua
Keyword(s):  
Zeta Potential ◽  
Aqueous Solutions ◽  
Treatment Process ◽  
Froth Flotation ◽  
Main Constituent ◽  
Full Understanding ◽  
Factors Affecting ◽  
Froth Stability ◽  
Main Factors ◽  
Phosphate Ores

The way to successfully upgrade a phosphate ore is based on the full understanding of its mineralogy, minerals surface properties, minerals distribution and liberation. The conception of a treatment process consists of choosing the proper operations with an adequate succession depending on the ore properties. Usually, froth flotation takes place in phosphate enrichment processes, since it is cheap, convenient, and well developed. Nevertheless, it is a complex technique as it depends on the mineral’s superficial properties in aqueous solutions. Aspects such as wettability, surface charge, zeta potential, and the solubility of minerals play a basic role in defining the flotation conditions. These aspects range from the reagents type and dosage to the pH of the pulp. Other variables namely particles size, froth stability, and bubbles size play critical roles during the treatment, as well. The overall aim is to control the selectivity and recovery of the process. The following review is an attempt to add to previous works gathering phosphate froth flotation data. In that sense, the relevant parameters of phosphate ores flotation are discussed while focusing on apatite, calcite, dolomite, and quartz as main constituent minerals.

Adsorption and zeta potential studies relevant to hematite ore reverse froth flotation

2012 ◽  
Vol 29 (3) ◽  
pp. 148-155
Author(s):  
Wentian Jiang ◽  
Chenglin Sun ◽  
Xu Yang
Keyword(s):  
Zeta Potential ◽  
Froth Flotation ◽  
Hematite Ore

Zeta potential of air bubbles in presence of frothers

2008 ◽  
Vol 89 (1-4) ◽  
pp. 40-43 ◽  
Author(s):  
A.M. Elmahdy ◽  
M. Mirnezami ◽  
J.A. Finch
Keyword(s):  
Zeta Potential ◽  
Air Bubbles

scholarly journals Surface Mechanism of Fe3+ Ions on the Improvement of Fine Monazite Flotation With Octyl Hydroxamate as the Collector

2021 ◽  
Vol 9 ◽  
Author(s):  
Qingzhu Zheng ◽  
Yunlou Qian ◽  
Dan Zou ◽  
Zhen Wang ◽  
Yang Bai ◽  
...  
Keyword(s):  
Zeta Potential ◽  
Fluorescence Spectrum ◽  
Photoelectron Spectroscopy ◽  
Froth Flotation ◽  
Research Direction ◽  
Surface Hydrophobicity ◽  
Coarse Fraction ◽  
Theory And Practice ◽  
Schematic Model ◽  
Hydrophobic Adsorption

Froth flotation of fine minerals has always been an important research direction in terms of theory and practice. In this paper, the effect and mechanism of Fe3+ on improving surface hydrophobicity and flotation of fine monazite using sodium octyl hydroxamate (SOH) as a collector were investigated through a series of laboratory tests and detection measurements including microflotation, fluorescence spectrum, zeta potential, and X-ray photoelectron spectroscopy (XPS). Flotation tests have shown that fine monazite particles (−26 + 15 μm) cannot be floated well with the SOH collector compared to the coarse fraction (−74 + 38 μm). However, adding a small amount of Fe3+ to the pulp before SOH can significantly improve the flotation of fine monazite. This is because the addition of Fe3+ promotes the adsorption of SOH and greatly improves the hydrophobicity of the monazite surface. This can result in the formation of a more uniform and dense hydrophobic adsorption layer, as shown by the fluorescence spectrum and zeta potential results. From the XPS results, Fe3+ reacts with surface O atoms on the surface of monazite to form a monazite–Osurf–Fe group that acts as a new additional active site for SOH adsorption. A schematic model was also proposed to explain the mechanism of Fe3+ for improving surface hydrophobicity and flotation of fine monazite using octyl hydroxamate as a collector. The innovative point of this study is using a simple reagent scheme to float fine mineral particles rather than traditional complex processes.

scholarly journals An approach to the evaluation of froth flotation reagents based on the use of the SWARA and WS-PLP methods

2017 ◽  
pp. 103-110
Author(s):  
Dragiša Stanujkić ◽  
Dragan Milanović ◽  
Srđana Magdalinović ◽  
Ivana Jovanović
Keyword(s):  
Froth Flotation ◽  
Flotation Reagents

FROTH FLOTATION OF RUBBER AND RESIN COMPONENTS OF MILKWEED AND OTHER PLANTS THAT CONTAIN RESINS, RUBBER, BALATA, OR RELATED GUMMY SUBSTANCES

1943 ◽  
Vol 21b (10) ◽  
pp. 195-201 ◽  
Author(s):  
Wm. T. Turrall ◽  
H. Smedley ◽  
J. Klassen
Keyword(s):  
Ball Milling ◽  
Chemical Treatment ◽  
Froth Flotation ◽  
Plant Materials ◽  
Flotation Reagents ◽  
Flotation Agents ◽  
Wild Lettuce ◽  
Flotation Method

Application of the froth flotation methods used in mineral dressing operations to the separation of rubber–resin fractions of milkweed offers hope of placing the extraction of such plant materials on a continuous rather than a batch basis. When the flotation method was used, no chemical treatment or flotation agents were necessary for the separation of rubber–resin from milkweed, though additional flotation reagents were found necessary for some other plants. The rubber–resin components of all plants studied, namely, milkweed, dogbane, goat's-beard, sow thistle, and wild lettuce, were successfully concentrated.Under favourable conditions rubber–resins may not agglomerate during ball-milling; in some instances the flotation method can be used for the separation of the dispersed rubber–resin.

scholarly journals A Review of Flotation Separation of Mg Carbonates (Dolomite and Magnesite)

Minerals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 354 ◽  
Author(s):  
Darius Wonyen ◽  
Varney Kromah ◽  
Borbor Gibson ◽  
Solomon Nah ◽  
Saeed Chelgani
Keyword(s):  
Particle Size ◽  
Adverse Effects ◽  
Zeta Potential ◽  
Separation Efficiency ◽  
Froth Flotation ◽  
Surface Characteristics ◽  
Economic Viability ◽  
Ore Bodies

It is well documented that flotation has high economic viability for the beneficiation of valuable minerals when their main ore bodies contain magnesium (Mg) carbonates such as dolomite and magnesite. Flotation separation of Mg carbonates from their associated valuable minerals (AVMs) presents several challenges, and Mg carbonates have high levels of adverse effects on separation efficiency. These complexities can be attributed to various reasons: Mg carbonates are naturally hydrophilic, soluble, and exhibit similar surface characteristics as their AVMs. This study presents a compilation of various parameters, including zeta potential, pH, particle size, reagents (collectors, depressant, and modifiers), and bio-flotation, which were examined in several investigations into separating Mg carbonates from their AVMs by froth flotation.

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