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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

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 …

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.

Amphoteric collectors are mostly oxide ore collector, which can be used for the flotation of various metal oxide ores and saline minerals. Amphoteric collectors have …

Amphoteric collector frother for reverse flotation of phosphate ore. •. Froth flotation is an innovative process to enrich the phosphates. •. Reverse flotation is …

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 ...

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.

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 ...

Bacterially induced phosphate–dolomite separation using amphoteric collector. Ayman El-Midany. 2013, Separation and Purification Technology. See Full PDF Download PDF.

Shao, X., Jiang, C.L. & Parekh, B.K. Enhanced flotation separation of phosphate and dolomite using a new amphoteric collector. Mining, Metallurgy & …

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.

Commercial-grade dodecyl-N-carboxyethyl-N-hydroxyethyl-imidazoline, a new amphoteric surfactant, has been found to be a good collector for the separation of …

In each experiment, 2.00 g of the single or binary mineral mixture (1.00 g of scheelite + 1.00 g of calcite) was stirred with 35 mL of DI water. The desired collector was added to the mixtures, stirred for 3 min, and then the floatation was conducted for 3 min after adjusting the pH value.

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 ...

The design and development of selective flotation collectors has been the key to the remarkable success of flotation in beneficiating complex, difficult-to-process ores. Sustained research efforts in the field over the past hundred years have led to delineating the scientific basis of selective mineral flotation in terms of the crystal chemistry and the …

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 ...

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 ...

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 …

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 …

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% P2O5 with a recovery of 68% at pH 11, 3.0 kg/t amphoteric collector, 4×10 7 cells of PA is obtained.

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.

Pure minerals of silica and hematite were used to investigate the mechanism of the amphoteric collector adsorption on both minerals. It was found that …

College of Mining, Guizhou University, Guiyang 550025, Guizhou, China. More Information. Received Date: 11 October 2021. Publish Date: 25 December 2021. …

Transactions of the Institutions of Mining and Metallurgy: Section C Volume 117, 2008 - Issue 3. Submit an article Journal homepage. 36 Views 3 ... 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 ...

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 ...

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.

The synthesized amphoteric collector α-benzol amino benzyl phosphoric acid (BABP) exhibits selective collection for calcium-containing minerals, allowing preferential flotation separation by control of pulp pH. Using the BABP as a collector, fluorite can be floated over a pH range from 6 to 10, while calcite is floatable at pH …

In froth flotation, special surfactants (known as so-called collectors) selectively cling to specific minerals in mineral/water slurry to increase their surface hydrophobicity so that the hydrophobized mineral particles can attach selectively to air bubbles and transfer to water/air interface [1]. Commonly, a flotation collector consists of ...

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 …