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Processes
Special Issues
Flow of Bubbles and Particles in the Flotation Process
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Flow of Bubbles and Particles in the Flotation Process

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Separation Processes".

Deadline for manuscript submissions: closed (18 October 2023) | Viewed by 1363

Special Issue Editor

Dr. Pavlína Basařová

E-Mail Website1 Website2
Guest Editor
Department of Chemical Engineering, University of Chemistry and Technology, 166 28 Prague, Czech Republic
Interests: flotation; bubble behavior; water-alcohol systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The interaction between bubbles and solid particles is an important mechanism in many industrial processes, and flotation is a significant component of the most commonly utilized applications. The flotation method enables the separation of different solid particles based on their hydrophobicity or hydrophilicity. Today, flotation is used not only for the separation of coal or mineral particles from mined ore deposits, but also for the separation of plastic materials, wastewater treatment, or paper recycling. Flotation is a complex process that involves the formation of aggregates of particles and bubbles in a liquid medium. These aggregates are the result of collisions and consecutive attachment between rising bubbles and suspended particles. Therefore, the rising velocity of the bubbles, the settling velocity of the particles, and their mutual ratio are key factors to expressing the probability of a collision.

This Special Issue, entitled “Flow of Bubbles and Particles in Flotation Process”, welcomes studies focused on bubble and particle flow including single-bubble motion and deformation, fine- and coarse-particle settling, bubble and/or particle behavior in aerated systems, and the probability of bubble–particle collision. Both experimental and numerical studies will be welcomed.

Dr. Pavlína Basařová
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • flotation
  • bubble–particle collision
  • bubble motion
  • particle settling
  • collision efficiency

Published Papers (1 paper)

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Research

11 pages, 2308 KiB  
Article
An Innovative Sensor-Based Approach for Evaluating Performance of Flotation Circuit at the Expansion of Toromocho Copper Mine
by Wei Zhang, Zhiyong Tan, Tengfei Li, Xiaoqiang Guan, Shiqing Zhou, Haibin Li and Chao Wang
Processes 2023, 11(4), 1230; https://doi.org/10.3390/pr11041230 - 16 Apr 2023
Viewed by 1042
Abstract
Chinalco’s Toromocho mine, located in the Morococha district of Peru, treated 117,200 mtpd ores during last 10 years. It is currently undergoing expansion, treating approximately 52,740 mtpd of chalcopyrite ore since 2021. As with the commissioning of most large plants, the metallurgical performance [...] Read more.
Chinalco’s Toromocho mine, located in the Morococha district of Peru, treated 117,200 mtpd ores during last 10 years. It is currently undergoing expansion, treating approximately 52,740 mtpd of chalcopyrite ore since 2021. As with the commissioning of most large plants, the metallurgical performance levels produced after stability was achieved were below the design criteria; more specifically, the Cu overall recoveries were 80–82% compared with the design value of 85%, and the final concentrate Cu grades were 20–23% compared with the design value of 24% over the past 2 years. It is clear that the copper losses in the fine size fraction (<10 µm) were due to unoptimized hydrodynamics. To overcome this obstacle and improve overall performance, an innovative approach for flotation circuit evaluation was designed and set up, to improve understanding of the nature of the mineral losses, benchmark the cell hydrodynamics as a platform to improve flotation cell operation, and link the circuit setup and operation to gas dispersion characteristics. These needs were fulfilled by the developments in gas dispersion sensor technology and process measurement methodology of CRIST. Effectively utilizing the sensor technology, it was observed that the deficient recovery of the Toromocho expansion plant was due to poor recovery of <10 μm Cu, as a result of a lack of small bubbles (<1 mm) compared to the pilot circuit. The resulting data highlight the potential for recovery improvement (increased kinetics) via bubble size reduction and increased air rate. Full article
(This article belongs to the Special Issue Flow of Bubbles and Particles in the Flotation Process)
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