Kinetic Characterization and Its Applications in Mineral Processing

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Processing and Extractive Metallurgy".

Deadline for manuscript submissions: 20 June 2025 | Viewed by 331

Special Issue Editors


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Guest Editor
Department of Chemical and Environmental Engineering, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso, Chile
Interests: flotation; modelling and simulation; optimization; hydrodynamics and gas dispersion; process control
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Department of Geoscience and Petroleum, Faculty of Engineering, Norwegian University of Science and Technology, Andersens veg 15a, 7031 Trondheim, Norway
Interests: particle-bubble interactions; flotation machines; surface and colloidal chemistries; kinetics and thermodynamics; ultrafine grinding; gold and silver leaching
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Guest Editor
Department of Earth Science & Engineering, Imperial College London, London SW7 2AZ, UK
Interests: flotation design; multiphase fluid dynamics; froth stability; sustainable geometallurgy

Special Issue Information

Dear Colleagues,

Kinetic characterizations have been used extensively in mineral processing to determine the rates at which a product is obtained. These rates are related to several sub-processes in both comminution and concentration. A kinetic characterization typically consists of measuring a metallurgical index as a function of time, determining parameters associated with the decay ratios and steady performances. From these results, ore or machine features are determined, which are critical to the scale-up of metallurgical results from laboratory tests to industrial systems. Kinetic responses also allow for the comparison of different operating conditions and machines in mineral processing. Although kinetic studies are widely used in academic research and routinely conducted in industrial applications, it has widely been accepted that there is a lack of experimental and modelling standards, which has justified further investigations in this regard. Under the advancements in analytical, mineralogical and computational tools, kinetic characterizations have been expanded to incorporate different particle properties, new models and estimation algorithms, or both together. The aim of this Special Issue is to invite contributions from a group of experts to present the latest results and recent advancements in the following areas:

  • Kinetic characterizations at laboratory, pilot or industrial scales to evaluate and compare metallurgical performances.
  • Kinetic modelling and its applications in mineral processing.
  • Recent advancements in kinetic characterizations incorporating different particle properties, such as size, composition, liberation, association, among others.
  • The use of new tools, model strategies and algorithms to characterize kinetic responses in mineral processing.
  • Scale-up of laboratory results to continuous/industrial systems, and the implications for machine and circuit sizing.

Dr. Luis Vinnett
Dr. Ahmad Hassanzadeh
Dr. Diego Mesa
Guest Editors

Manuscript Submission Information

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Keywords

  • flotation kinetics
  • breakage rate
  • flotation rate
  • selection function
  • scale-up
  • time-recovery data
  • flotation modelling
  • comminution modelling
  • simulation

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Published Papers (1 paper)

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Research

10 pages, 1227 KiB  
Article
Using Intensified Flotation Cells to Improve Cleaning Circuit Performance
by Paulina Vallejos, Juan Yianatos, Marcelo Rodríguez and Jorge Cortínez
Minerals 2025, 15(5), 453; https://doi.org/10.3390/min15050453 (registering DOI) - 27 Apr 2025
Abstract
The cleaning circuit of the collective Cu-Mo flotation plant at Collahuasi (north of Chile) consisted of two parallel flotation rows, each one of three first cleaner cells in series with six cleaner–scavenger cells. The second cleaner consisted of 10 parallel columns (6 rectangular [...] Read more.
The cleaning circuit of the collective Cu-Mo flotation plant at Collahuasi (north of Chile) consisted of two parallel flotation rows, each one of three first cleaner cells in series with six cleaner–scavenger cells. The second cleaner consisted of 10 parallel columns (6 rectangular and 4 circular), whose tailings were directly recycled to the first cleaner. Recently, a project was developed to upgrade the cleaning circuit by decreasing the large Mo circulating load and improving the cleaning circuit performance. For this purpose, a testing strategy was set up at a pilot scale to evaluate the use of intensified flotation (Jameson cells), mainly for collecting the fine Mo particles accumulated in the circulating load, which contributes to the Mo losses from the scavenger stage into the final tailings. The preliminary results regarding kinetics at the pilot scale showed good potential to improve the metallurgical performance of Mo and Cu, and a sensitivity study was carried out to evaluate the application of this technology in the industrial cleaning circuit. Then, two parallel Jameson cells were selected to re-treat the whole column tailings stream. This operation allowed for the generation of a direct final Cu-Mo concentrate (that joins the columns concentrate) while recycling their tailings to the first cleaner. After commissioning, three sampling campaigns were performed on the whole flotation plant, particularly on the overall cleaning circuit, to evaluate the impact of the new flotation cells. Results showed that the Jameson cells effectively decreased the minerals circulating loads in the cleaning stage, mainly for Mo (in 49%). The Jameson cells directly contribute 48% of Mo and 25% Cu of the minerals in the final concentrate and allow for increasing the Mo final grade (0.45% Mo vs. 0.29% from columns). These results were in good agreement with predictions from the pilot testing. Full article
(This article belongs to the Special Issue Kinetic Characterization and Its Applications in Mineral Processing)
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