Lecithin as an ecofriendly amphoteric collector ing …
The development of more widely available, effective, economical, and environmentally friendly reagents is one of the major prospects of the phosphate industry.In this work, an eco-friendly reagent based on lecithin was successfully elaborated and adopted as a new amphoteric collector and frother, both for the flotation of phosphate …
Application of amphoteric collector for dolomite …
The separation of dolomite from Abu-Tartur phosphate ore using a similar amphoteric collector was conducted by Elmahdy et al. [73]. Under the determined optimal flotation parameters, a concentrate ...
Amphoteric Definition and Examples
Here are some examples of amphoterism: Metal oxides or hydroxides are amphoteric. Whether a metal compound acts as an acid or a base depends on the oxide oxidation state. Sulfuric acid (H 2 SO 4) is an acid in water but is amphoteric in superacids. Amphiprotic molecules, such as amino acids and proteins, are amphoteric.
Dolomite-apatite separation by amphoteric collector in …
Professor of Mining, Petroleum and Metallurgical Engineering. ... A.M.Elmahdy, S.E.El-Mofty, M. A. Abdel-Khalek, N.A.Abdel-Khalek, and A.A.El-Midany, "Dolomite-apatite separation by amphoteric collector in presence of bacteria", Journal of Central South University of Technology, vol. 20, pp. 1645-1652, 2013. ... Valuation of chloride salts and ...
Separation of dolomite from phosphate minerals by
Transactions of the Institutions of Mining and Metallurgy: Section C ... by flotation with a new amphoteric surfactant as collector, Mineral Processing and Extractive ... when the new collector ...
Experimental Research on Direct-Reverse Flotation of …
The reverse flotation was one roughing and one scavenging with the dosage of sulfate 15 kg/t, the dosage of inhibitor LMX-1 0.6kg/t, the dosage of amphoteric collector SB-116 0.25 kg/t in roughing ...
Reagents used in the flotation of phosphate ores: a critical …
An oily collector (e.g., fuel oil) is mostly used together as collector or collector extender to reduce the consumption and excess ing the fatty acids. 3. Cationic and amphoteric collectors are usually used in the reverse flotation of silicates from phosphate ore in phosphate industry.
Bacterially induced phosphate–dolomite separation using amphoteric …
The utilization of bacteria alone or in presence of collector offers a good solution in terms of increasing the separation selectivity. In this study, the bioflotation was tested using two bacterial strains (Corynebacterium-diphtheriae-intermedius, CDI, or Pseudomonas Aeruginosa, PA) in the presence of amphoteric collector.
Application of amphoteric collector for dolomite …
collector has become a must especially with the global depletion of the rich and easy to process siliceous phosphate ores. An amphoteric surfactant was found to be used as a …
Application of amphoteric collector for dolomite separation …
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Interaction of Amphoteric Collector with Silica and …
Pure minerals of silica and hematite were used to investigate the mechanism of the amphoteric collector adsorption on both minerals. It was found that …
Kinetic Modelling and Equilibrium of Amphoteric Collector …
Most of the world iron ores are associated with siliceous impurities. Upgrading schemes depend mostly on the removal of these impurities by flotation and/or selective flocculation techniques, which mainly influenced by the adsorption of collectors on both valuable and gangue minerals. In this study, the adsorption of amphoteric collector …
Lecithin as an ecofriendly amphoteric collector …
Amphoteric collector frother for reverse flotation of phosphate ore. •. Froth flotation is an innovative process to enrich the phosphates. •. Reverse flotation is …
Adsorption mechanism of amphoteric collector on …
Pure minerals of silica and hematite were used to investigate the mechanism of the amphoteric collector adsorption on both minerals. It was found that …
Cationic and Amphoteric Collectors | 8 | Reagents in …
Cationic collectors generally possess long hydrocarbon chains, eight carbon atoms or longer in length. Important variables regarding the collecting properties of amphoteric surfactants, in addition to those of conventional cationic and anionic collectors, include the pk a values of both the anionic and cationic groups and the isoelectric point ...
Experimental Research on Direct-Reverse Flotation of
According to the ore nature of limonite in Xinjiang,use the technological process of one stage selectrifine high magnetic separation—reverse flotation to the limonite. the result show that at the fineness ore of -200order 60.0%, employ the closed-circuit process,Limonite concentrates aining above 52.24％ Fe could be obtained at a productive rate of …
Application of amphoteric collector for dolomite separation …
In this study, an amphoteric collector was used to remove the dolomite from phosphate ore as one trial in this field. The optimisation of this process using one factor at a time is a tedious process. Therefore, the factorial design was used for maximising dolomite separation efficiency.
Separation of dolomite from phosphate minerals by …
The amphoteric collector used in the tests was a commercial-grade surfactant with the chemical name dodecyl-N-carboxyethyl-N-hydroxyethyl-imidazoline, which was sup-plied by Lianyungang Chemicals Plant, Jiangsu Province, China.13 Procedures Floatability measurements To measure floatability 10 g of pure mineral was conditioned
OneMine | Amphoteric Surfactants as Flotation Collectors
Amphoteric surfactants are heteropolar organic compounds which possess at least two functional (ionic) oppositely charged groups per molecule. The ones studied are manufactured by General Mills and possess one or more long hydrocarbon chains plus a carboxyl group (s) and an amino or imino group. Hallimond tube and M. C. Fuerstenau …
Adsorption mechanism of amphoteric collector on …
Keywords: Amphoteric collector, Zeta potential, Electrostatic interaction, Adsorption Introduction ... 2008 Institute of Materials, Minerals and Mining and The AusIMM
Preparation of A New Amphoteric Collector and Its Flotation …
College of Mining, Guizhou University, Guiyang 550025, Guizhou, China. More Information. Received Date: 11 October 2021. Publish Date: 25 December 2021. …
Lecithin as an ecofriendly amphoteric collector ing …
As a result, amphoteric lecithin acts as an effective collector, producing a concentrate containing 30.05% P 2 O 5 with a recovery of 98.21% at pH 5. Likewise, a high quality and environmentally friendly sample with a content of 32.39% and a recovery of 96% was obtained at the natural pH of the pulp (8.5) without any reagents to modify the pH ...
Review of interactions in flotation of sparingly soluble …
The literature on the interaction between sparingly soluble calcium minerals and the flotation environment is reviewed. The review is restricted to apatite, calcite and fluorite as minerals and fatty acids as collectors. The mechanisms by which the reagents react with the surface, the forms they assume at the surface and how the latter affect ...
Dolomite-apatite separation by amphoteric collector in …
The results show that the collector-bacteria interaction improves the flotation selectivity. Although, the PA positively affects the separation results, the CDI cannot lower the MgO to less than 1%. A phosphate content of 0.7% MgO and 31.77% P 2 O 5 with a recovery of 68% at pH 11, 3.0 kg/t amphoteric collector, 4×10 7 cells of PA is obtained.
Adsorption mechanism of amphoteric collector on silica …
In the current work, an amphoteric collector was used as an alternative for the current reagents. Pure minerals of silica and hematite were used to investigate the mechanism of the amphoteric collector adsorption on both minerals. It was found that the adsorption density of collector was pH dependent.
(PDF) Dolomite-apatite separation by amphoteric collector …
A phosphate content of 0.7% MgO and 31.77% P 2 O 5 with a recovery of 68% at pH 11, 3.0 kg/t amphoteric collector, 4×10 7 cells of PA is obtained. ... Mining, Petroleum and Met allurgical ...
Enhanced flotation separation of phosphate and …
Shao, X., Jiang, C.L. & Parekh, B.K. Enhanced flotation separation of phosphate and dolomite using a new amphoteric collector. Mining, Metallurgy & …
Comparison of Anionic, Cationic and Amphoteric Collectors …
The adsorption mechanism of a mine type collectors is proposed to be through columbic forces (Smith and Akhtar, 1976) between the polar group of the col lector and th e charged electrical double ...
Statistical significance of some operating parameters on
An amphoteric collector was tested for dolomite removal from phosphate ore. The effects of some operating parameters and their significance on the flotation of dolomite were studied using statistically designed experiments. The parameters studied were impeller speed, pH and collector dosage. Analysis of the results showed that pH is …
Kinetic Modelling and Equilibrium of Amphoteric …
In this study, the adsorption of amphoteric collector (dodecyl-N-carboxyethyl-N-hydroxyethyl-imidazoline) on silica and hematite was studied. The …