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Minerals
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New Developments in Mineral Processing by Physical Separation and Flotation...
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New Developments in Mineral Processing by Physical Separation and Flotation Methods

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

Deadline for manuscript submissions: closed (31 August 2020) | Viewed by 15620

Special Issue Editor

Dr. María Ángeles Martín-Lara

E-Mail Website
Guest Editor
Department of Chemical Engineering, University of Granada, 18071 Granada, Spain
Interests: biomass gasification, pyrolysis, and torrefaction; adsorption of contaminants (mainly heavy metals) by porous solids; advances in mineral processing and management of mining waste; plastic waste management; life cycle assessment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The purpose of this Special Issue is to provide papers featuring the latest developments in the fields of mineral processing by physical separation and flotation methods. Flotation is widely used to separate valuable minerals from rock and fine coal particles from clay, silt, shale, and other ash-producing matter. This Special Issue provides wide-ranging coverage of research and practical (operating) topics including process control, simulation and instrumentation, and environmental issues.

Prof. María Ángeles Martín-Lara
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. Minerals 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
  • Size reduction
  • Sizing separation
  • Concentration separation
  • Dewatering

Published Papers (5 papers)

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Research

13 pages, 3463 KiB  
Article
Removal of Impurities from Shungite Via a Combination of Physical and Chemical Treatments
by Toyohisa Fujita, Taichi Aoki, Josiane Ponou, Gjergj Dodbiba, Chunlin He, Kaituo Wang, Shunyan Ning, Hao Chen and Yuezou Wei
Minerals 2021, 11(3), 245; https://doi.org/10.3390/min11030245 - 26 Feb 2021
Cited by 5 | Viewed by 3014
Abstract
This study investigated the removal of sulfur and iron from shungite rocks through different methods after fine grinding: flotation, magnetic separation, microwave treatment, and chemical leaching. In this work, first, a mineralogical study of shungite was conducted. The carbon, silica, iron, and sulfur [...] Read more.
This study investigated the removal of sulfur and iron from shungite rocks through different methods after fine grinding: flotation, magnetic separation, microwave treatment, and chemical leaching. In this work, first, a mineralogical study of shungite was conducted. The carbon, silica, iron, and sulfur compositions in the as-received shungite were 45.4%, 38.3%, 4.6%, and 2.4%, respectively. In flotation, a sulfur grade of 1.4% was obtained. In the wet high-gradient magnetic separation at a magnetic flux density of 1 tesla, the iron and sulfur grades in the nonmagnetic fraction were 2.8% and 1.9%, respectively. Furthermore, the sulfur reduced to 0.2% by the 9 min microwave irradiation. In addition, chemical leaching using chelating reagents and inorganic acids was utilized to remove iron and sulfur. Nitrilotriacetic acid (NTA) could reduce the iron and sulfur grades to 2.0% and 0.9%, respectively. For leaching using reverse aqua regia, the iron and sulfur grades were reduced to 0.9% and 0.23%, respectively. For leaching using a 6N HCl with H2O2 aqueous solution, the iron and sulfur grades were reduced to 0.8% and 0.34%, respectively. Overall, chemical leaching using HCl with H2O2 was the most effective for iron and sulfur removal from shungite. Full article
(This article belongs to the Special Issue New Developments in Mineral Processing by Physical Separation and Flotation Methods)
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14 pages, 3084 KiB  
Article
A Novel Pneumatic Planar Magnetic Separator for Magnetite Beneficiation: A Focus on Flowsheet Configuration
by Emmanuel Baawuah, Christopher Kelsey, Jonas Addai-Mensah and William Skinner
Minerals 2020, 10(9), 759; https://doi.org/10.3390/min10090759 - 27 Aug 2020
Cited by 5 | Viewed by 3342
Abstract
In our previous studies, we investigated the performance of a novel pneumatic planar magnetic separator (PMS) for the dry beneficiation of a selected magnetite ore. In the present study, we have extended the studies on the PMS with the focus on investigating how [...] Read more.
In our previous studies, we investigated the performance of a novel pneumatic planar magnetic separator (PMS) for the dry beneficiation of a selected magnetite ore. In the present study, we have extended the studies on the PMS with the focus on investigating how various PMS processing flowsheet configurations influence its performance. The outcomes were subsequently compared with those of a Davis tube recovery (DTR) tester. The study demonstrated that the use of PMS in the dry beneficiation of magnetite ores is feasible, and operating the PMS in different flowsheet configurations positively influences the magnetite concentrate grade and purity. Finally, the study showed that the PMS performance compares well with that of DTR and can potentially replace DTR in operations that are carried out in arid regions. Full article
(This article belongs to the Special Issue New Developments in Mineral Processing by Physical Separation and Flotation Methods)
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19 pages, 4339 KiB  
Article
An Improvement on Selective Separation by Applying Ultrasound to Rougher and Re-Cleaner Stages of Copper Flotation
by Ahmad Hassanzadeh, Sayed Ali Sajjady, Hamed Gholami, Saeed Amini and Safak Gökhan Özkan
Minerals 2020, 10(7), 619; https://doi.org/10.3390/min10070619 - 09 Jul 2020
Cited by 15 | Viewed by 3614
Abstract
It has been known that the power ultrasound is used as a pretreatment and rarely applied as a simultaneous method to improve grade and recovery during froth flotation processes. This work aimed at investigating the impact of simultaneously used ultrasonic waves under variant [...] Read more.
It has been known that the power ultrasound is used as a pretreatment and rarely applied as a simultaneous method to improve grade and recovery during froth flotation processes. This work aimed at investigating the impact of simultaneously used ultrasonic waves under variant operating configurations on the flotation of representative porphyry copper ore during rougher and re-cleaner stages. For this purpose, four different operating outlines were examined as (I) conventional flotation, (II) homogenizer, (III) ultrasonic bath, and (IV) combination of a homogenizer and an ultrasonic bath. The ultrasonic vibration was generated by the homogenizer (21 kHz, 1 kW) in the froth zone and ultrasonic bath (35 kHz, 0.3 kW) in the bulk zone. The rougher and re-cleaner flotation experiments were conducted using Denver-type mechanically agitated cells with 4.2 and 1 L capacities, respectively. The results showed that using the homogenizer (at 0.4 kW) slightly affected the selectivity separation index of chalcopyrite and pyrite, although it positively increased the grade of chalcopyrite from 21.5% to 25.7%. The ultrasonic-assisted flotation experiments with the ultrasonic bath and its combination with the homogenizer (0.4 kW) (i.e., configurations III and IV) led to an increase of approximately 16.1% and 26.9% in the chalcopyrite selectivity index compared to the conventional flotation, respectively. At the cleaning stage, a lower grade of aluminum silicate-based minerals was obtained desirably in every ultrasonic-treated configuration, which was supported with the water recoveries. Finally, applying the homogenizer and its combination with the ultrasonic bath were recommended for re-cleaner and rougher stages, respectively. Further fundamental and practical knowledge gaps required to be studied were highlighted. Full article
(This article belongs to the Special Issue New Developments in Mineral Processing by Physical Separation and Flotation Methods)
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12 pages, 5856 KiB  
Article
Enhanced Bauxite Recovery Using a Flotation Column Packed with Multilayers of Medium
by Pengyu Zhang, Wencai Zhang, Leming Ou, Yuteng Zhu and Zicheng Zhu
Minerals 2020, 10(7), 594; https://doi.org/10.3390/min10070594 - 30 Jun 2020
Cited by 3 | Viewed by 1953
Abstract
An innovative self-designed medium was packed in a bench-scale flotation column to study its influence on the flotation recovery of bauxite. Computational fluid dynamics (CFD) simulation was conducted to reveal the impact of the packing medium on the turbulent characteristics of collection zone [...] Read more.
An innovative self-designed medium was packed in a bench-scale flotation column to study its influence on the flotation recovery of bauxite. Computational fluid dynamics (CFD) simulation was conducted to reveal the impact of the packing medium on the turbulent characteristics of collection zone in the column. Simulation results show that multilayer packing of the medium divides the collection zone into small units having different turbulent intensities, which is more suitable for flotation separation. The packing medium decreases the turbulence kinetic energy (from 1.08 × 10−2 m2/s2 to 2.1 × 10−3 m2/s2), turbulence eddy dissipation (from 3.71 × 10−2 m2/s3 to 9.8 × 10−3 m2/s3) and axial fluid velocity of fluid in the column. With three layers of packing, the recovery of Al2O3 increased by 2.11% and the aluminum to silicon content ratio of the concentrate improved from 5.16 to 9.72. Full article
(This article belongs to the Special Issue New Developments in Mineral Processing by Physical Separation and Flotation Methods)
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14 pages, 1926 KiB  
Article
Testing of New Collectors for Concentration of Fluorite by Flotation in Pneumatic (Modified Hallimond Tube) and Mechanical Cells
by J.R. Corpas-Martínez, A. Pérez, R. Navarro-Domínguez, C. Amor-Castillo, M.A. Martín-Lara and M. Calero
Minerals 2020, 10(5), 482; https://doi.org/10.3390/min10050482 - 25 May 2020
Cited by 4 | Viewed by 2850
Abstract
In this study, two new collectors for fluorite flotation DP-OMC-1033 (DP-I) and DP-OMC-1234 (DP-II) were tested and compared with oleic acid (OA), sodium oleate (SO) and potassium oleate (PO). According to fluorite grade and fluorite metallurgical recovery, the effect of each collector was [...] Read more.
In this study, two new collectors for fluorite flotation DP-OMC-1033 (DP-I) and DP-OMC-1234 (DP-II) were tested and compared with oleic acid (OA), sodium oleate (SO) and potassium oleate (PO). According to fluorite grade and fluorite metallurgical recovery, the effect of each collector was determined, both in mechanical and pneumatic cell flotation. The effect of temperature on the collectors from 25 to 55 °C was studied. Flotation tests showed that the best results in terms of fluorite metallurgical recovery were 82.8% and 87.9% for new collectors DP-I and DP-II respectively, for a dosage of 100 g/t and using pneumatic cell. Additionally, in terms of fluorite grade, DP-I showed the best results, achieving 79.7% of CaF2 in roughing step for a dosage of 100 g/t. Fluorite metallurgical recovery and grade in concentrate increased for OA, SO and PO with increasing temperature. However temperature did not have a significant effect on both metallurgy recovery and CaF2 grade using DP-I and DP-II, so the process can be effective at 25 °C reducing operating costs. Full article
(This article belongs to the Special Issue New Developments in Mineral Processing by Physical Separation and Flotation Methods)
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