Effect of Na + ion on the dissolution of ferrocolumbite in autoclave

Rodríguez, M. H.; Rosales, Gustavo D.; Pinna, Eliana Guadalupe; Suarez, Daniela Silvana

doi:10.1016/j.hydromet.2015.10.033

Cited by 9 publications

(3 citation statements)

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“…NaF is heavily used in organic synthesis and hydrometallurgy. 1,2 The solubility of NaF is also important to the action of toothpaste. 3 In nature, NaF is known as the mineral villiaumite and is found in alkaline rocks and evaporite deposits.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The solubility of sodium fluoride (NaF; CAS number 7681-49-4) in water is important to many industries. NaF is heavily used in organic synthesis and hydrometallurgy. , The solubility of NaF is also important to the action of toothpaste . In nature, NaF is known as the mineral villiaumite and is found in alkaline rocks and evaporite deposits. , The solubility of NaF is important to water treatment .…”

Section: Introductionmentioning

confidence: 99%

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A Review of Sodium Fluoride Solubility in Water

Reynolds

Belsher

2017

J. Chem. Eng. Data

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The solubility of NaF in water is important to a number of industries, but there is a limited review of the large amount of solubility data scattered throughout the literature. The present study collected all of the data on the NaF solubility in water that could be found in the peer-reviewed literature between the temperature 0 and 100.6 °C (the upper temperature being approximately the boiling point of a saturated solution). Fifty-five solubility data points were found, collected from 29 studies. There was a large amount of scatter among the data, both across and within most studies. After screening out suspect data, the solubility of NaF was found to be a linear function of temperature, with a change of solubility of 0.003 molal per °C. Averaging the data at 25 °C provides an estimated solubility of 0.987 molal at that temperature.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Review of Sodium Fluoride Solubility in Water

Reynolds

Belsher

2017

J. Chem. Eng. Data

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“…Despite the advantages of pressure hydrometallurgy, it does come with significant challenges. Among these is the management of the leaching process, which is a key aspect of pressure hydrometallurgy and has become a major topic in the field, such as catalysts for the leaching process [5], leaching medium [6], dispersants [7], etc. Additionally, the phenomenon of flash boiling presents potential safety risks that must be carefully managed.…”

Section: Introductionmentioning

confidence: 99%

An Overview of Flashing Phenomena in Pressure Hydrometallurgy

Liu

Zhou

et al. 2023

Processes

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Pressure hydrometallurgy has attracted much attention for its characteristics, such as the high adaptability of raw materials and environmental friendliness. Flashing (flash boiling or flash evaporation) refers to the phase change phenomenon from liquid to gas triggered by depressurization, which is an important connection between high-pressure processes and atmospheric ones in pressure hydrometallurgy. This paper takes the flashing process in zinc leaching and alumina Bayer processes as examples, describes the flashing process in pressure hydrometallurgy in detail for the first time, and shows the importance of the flashing process in energy recovery, solution concentration, and liquid balance, as well as increasing equipment life. According to solid holdup (the volume percentage of solid), this paper proposes to divide the flashing process into solution flashing (low solid holdup) and slurry flashing (high solid holdup). A further focus is put on reviewing the state of the art of related studies. The results reveal that the research on the flashing process in pressure hydrometallurgy is scarce and often oversimplified, e.g., ignoring the BPE (boiling point elevation) and NEA (non-equilibrium allowance) in solution flashing and the effect of solid particles in slurry flashing. Computational fluid dynamic (CFD) simulation is a promising tool for investigating the flashing process. Based on the progress made in other fields, e.g., seawater desalination, nuclear safety analysis, and engine fuel atomization, we suggest that solution flashing can be studied using the CFD–PBM (population balance model) coupled two-fluid model, since a wide size range of bubbles will be generated. For slurry flashing, the effect of solid holdup on the bubble nucleation rate and mechanism as well as other bubble dynamics processes should be accounted for additionally, for which a quantitative description is still lacking. Meanwhile, data for validating the numerical method are scarce because of the harsh experimental conditions, and further research is needed. In summary, this work presents an overview of the flashing processes in pressure hydrometallurgy and some guidelines for future numerical studies.

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