How does the SDS addition in talc grinding affect its floatability?

Farag, R. M.; El‐Midany, A. A.

doi:10.1080/02726351.2021.1952666

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…However, it consumes most of the mineral processing plant power (Stehr et al, 1987). The grinding aids were commonly used to reduce the grinding power consumption due to their effect on the hydrodynamic characteristics of the pulp (Chipakwe et al, 2020; El‐Shall & Somasundaran, 1984; Farag & El‐Midany, 2021, 2022). Nevertheless, the chemical additives do not always positively affect the surface of minerals due to the surfactant affinity to the mineral surface and the mode of mineral‐surfactant interaction (El‐Midany et al, 2008; El‐Midany et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

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Foam in grinding and role of ground mineral in its stability

El‐Midany,

Farag

2023

J Surfact & Detergents

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Surfactants are usually used as grinding aids. However, surfactant foaming during the grinding process is rarely mentioned in the literature with no clarification of its effect on the grinding process. In this paper, the generation of foam during the grinding of talc and quartz, as two different minerals in their hardness and hydrophobicity, was observed in the presence of sodium dodecyl sulfonate (SDS). The effect of generated foam on the fineness of ground product under different grinding conditions such as solids%, grinding time, and pulp pH was investigated. The results indicated that the foam was formed during the grinding of both minerals. The foam volume depends not only on the presence of surfactant but also on the characteristics of the mineral along with grinding conditions. The foam was intense and more stable particularly at pH 10 and high solid content (i.e., 60% solids) in the case of talc due to its fineness and hydrophobicity that result in bubbles stabilization. Remarkably, there is no foam at acidic pH due to the high ionic strength that leads to bubble instability. Most importantly, the presence of surfactant foams improves the size reduction process by providing more dispersion of particles, as one of the grinding aid mechanisms, due to particle‐particle and particle‐SDS repulsive electrostatic forces.

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Section: Introductionmentioning

confidence: 99%

“…Sodium dodecyl sulfonate (SDS) is a commonly used surfactant in mineral flotation (Martinez et al, 2011). The SDS proved to enhance the grinding of talc and quartz even at high solid content (Farag, 2021; Farag & El‐Midany, 2021, 2022). Although the SDS has a frothing power, the foaming in the grinding process with SDS is not addressed.…”

Section: Introductionmentioning

confidence: 99%

Foam in grinding and role of ground mineral in its stability

El‐Midany,

Farag

2023

J Surfact & Detergents

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Effect of Hydrophobicity on Talc Grinding in Attritor Mill

El-Mofty,

El-Bendary,

El-Midany

et al. 2023

Theor Found Chem Eng

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Influence of Bacillus subtilis on the surface behavior and separation of talc and chlorite minerals

El‐Sayed

Abdalla

Khalek

2022

Tenside Surfactants Detergents

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Bacillus subtilis was used as a bio-surface modifier to improve the floatability of talc mineral (Mg3Si4O10(OH)2) in the talc ore. The surface behavior of chlorite mineral as the main associated gangue with talc mineral was studied in the presence of B. subtilis using zeta potential, scanning electron microscopy, and Fourier-transform infrared spectroscopy techniques. The floatability of both minerals was investigated as a function of pH, contact time, and concentration of B. subtilis. The results showed that the zeta potential of the talc mineral was strongly influenced by the treatment with B. subtilis. The maximum separation efficiency of talc from chlorite was achieved at pH 4. A talc concentrate with 98% quality and about 95% recovery was prepared from a binary talc-chlorite mixture containing 85% talc under optimum conditions of 8 × 105 cells/mL B. subtilis, pH 4, 35°C, and a contact time of 10 min.

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How does the SDS addition in talc grinding affect its floatability?

Cited by 3 publications

References 31 publications

Foam in grinding and role of ground mineral in its stability

Foam in grinding and role of ground mineral in its stability

Effect of Hydrophobicity on Talc Grinding in Attritor Mill

Influence of Bacillus subtilis on the surface behavior and separation of talc and chlorite minerals

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