An investigation of froth stability in reverse flotation of collophane

Liu, Shunbing; Ge, Yulong; Ji, Fang; Yu, Jiaguo; Gan, Qintao

doi:10.1016/j.mineng.2020.106446

Cited by 16 publications

(8 citation statements)

References 33 publications

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“…The froth must sustain the particle's weight, while resisting excessive coalescence and bursting. On the other hand, the proper functioning of the flotation process requires a manageable and easily suppressed froth for a practical recovery [79]. Froth stability is affected by the parameters such as gas flow rate, stirring rate, solid content, particle size, mineralogy, reagents type and dosage, and water's ionic strength.…”

Section: Froth Stabilitymentioning

confidence: 99%

“…V f is the froth volume (cm 3 ), Q is the gas flowrate (cm 3 /s), S is the cross-sectional area of the column (cm 2 ), and H max is the maximum froth equilibrium height (cm). Liu et al [79] found that for fluorapatite, calcite, dolomite, and quartz the fine particles contribute to froth stability as a result of capillary mechanisms, whilst larger particles lead to froth rapture and instability. Additionally, they observed that increasing the solid content to a certain extent stabilizes the froth (Figure 3).…”

Section: Froth Stabilitymentioning

confidence: 99%

“…Additionally, they observed that increasing the solid content to a certain extent stabilizes the froth (Figure 3). manageable and easily suppressed froth for a practical recovery [79]. Froth stability is affected by the parameters such as gas flow rate, stirring rate, solid content, particle size, mineralogy, reagents type and dosage, and water's ionic strength.…”

Section: Froth Stabilitymentioning

confidence: 99%

“…Particle size and solid content: Liu et al [79] investigated, in their recent study, the effect of particle size and solid content on fluorapatite, calcite, dolomite, and quartz froths stability. Using a setup inspired from Lunkenheimer's report [81], they assessed the dynamic froth stability factor (Ʃ) for different particle sizes and solid contents.…”

Section: Froth Stabilitymentioning

confidence: 99%

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Review of the Main Factors Affecting the Flotation of Phosphate Ores

et al. 2020

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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.

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Section: Froth Stabilitymentioning

confidence: 99%

Section: Froth Stabilitymentioning

confidence: 99%

Section: Froth Stabilitymentioning

confidence: 99%

Section: Froth Stabilitymentioning

confidence: 99%

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Review of the Main Factors Affecting the Flotation of Phosphate Ores

et al. 2020

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“…Many factors can affect froth stability, e.g., frother type, frother concentration, and the nature and number of particles presented in the system. There are many researches on the effects of mineral particles, collectors, and frothers on froth stability (Aktas et al, 2008;Barbian et al, 2005;Barbian et al, 2003;Cilek and Karaca, 2015;Liu et al, 2020;Schwarz and Grano, 2005), however, few studies on the effects of depressants on froth have been conducted. Depending on the degree of substitution, CMC is usually used as a depressant of magnesium silicate minerals or pulp dispersant in flotation (Feng et al, 2012;Liu et al, 2006), but there is little discussion about the effect of CMC on foam properties.…”

Section: Introductionmentioning

confidence: 99%

The effect of sodium carboxymethyl cellulose on the entrainment of zoisite in flotation

Zhang¹,

Ou²,

Jin³

et al. 2021

Physicochem. Probl. Miner. Process.

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During flotation, fine gangue minerals can enter the concentrate through mechanical entrainment, which seriously affects the quality of concentrate. In this work, the effect of sodium carboxymethyl cellulose (CMC) on the flotation performance of zoisite, a silicate mineral, was studied. The role of CMC in reducing zoisite entrainment was investigated by dynamic foaming tests, surface tension measurements, rheology measurements, sedimentation tests, and optical microscopy experiments. The flotation results showed that zoisite mainly entered the concentrate by entrainment; the addition of low dosages of CMC decreased zoisite entrainment and efficiently separated cassiterite from zoisite; moreover, the concentrate grade and recovery of SnO2 increased by 1.27 % and 5.63 %, respectively, by using CMC in closed-circuit flotation tests. Dynamic foaming studies on the two-phase and three-phase foam/froth revealed that the presence of CMC decreased the froth ability and froth stability, and greatly altered the three-phase froth structure. Basically, the bubbles in the foam were larger after adding CMC. For the two-phase foam, the change of foam property had little to do with surface activity and bulk viscosity. For the three-phase froth, the froth property was strongly affected by the interaction of CMC and zoisite. The results of the sedimentation test and microscopy experiment demonstrated that CMC can cause zoisite to flocculate and enlarge the particle size, which was the main reason for the decrease of froth stability and entrainment. This study indicates that the side effects of depressants should not be overlooked when discussing the role of depressants in flotation.

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