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Minerals
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Advances in Application of Spectroscopic Techniques for Minerals Processing
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Advances in Application of Spectroscopic Techniques for Minerals 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: closed (1 February 2020) | Viewed by 10985

Special Issue Editor

Prof. Dr. Sarah Harmer-Bassell

E-Mail Website
Guest Editor
Flinders University
Interests: bacteria and mineral surfaces; mineralogy; spectroscopic techniques for minerals processing; SXPS; XANES; Condensed matter physics; Geochemistry; Biomining

Special Issue Information

Dear Colleagues

Mineral structure, texture, chemical composition and morphology play a major role in the successful separation and beneficiation of valuable minerals from their ores. The physical and chemical changes induced during comminution, sizing, froth flotation and leaching have been shown to influence both the quality of the product and the mechanism by which it is produced. The spectroscopic characterization and computation/simulation of ores during processing provides greater insight into the fundamental reactions that govern these processes.

This Special Issue aims to publish recent research regarding advances in the spectroscopic analysis tools applied under mineral processing conditions. This includes mineral surface and bulk characterization, electrochemistry, instrument development, inline processing, sensors, statistical analysis tools and sample handling methods.

Prof. Dr. Sarah Harmer-Bassell
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

  • Surface spectroscopy
  • X-ray microscopy
  • In situ analysis
  • mineralogy
  • comminution
  • liberation
  • physical separation (gravity, electrostatic, magnetic)
  • flotation (cells, bubble, surface chemistry, bioflotation)
  • leaching (bioleaching)
  • modelling and process simulation

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (3 papers)

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Research

12 pages, 5267 KiB  
Article
Atomic Force Microscopy and Raman Microspectroscopy Investigations of the Leaching of Chalcopyrite (112) Surface
by Gujie Qian, Christopher T. Gibson, Sarah Harmer-Bassell and Allan Pring
Minerals 2020, 10(6), 485; https://doi.org/10.3390/min10060485 - 26 May 2020
Cited by 4 | Viewed by 2467
Abstract
The aim of this study was to determine the reactivity of the chalcopyrite (112) surface under industrially relevant leaching conditions. Leaching of the chalcopyrite (112) surface was carried out at approximately pH 1 and in the presence of 0.01 M ferric or ferrous. [...] Read more.
The aim of this study was to determine the reactivity of the chalcopyrite (112) surface under industrially relevant leaching conditions. Leaching of the chalcopyrite (112) surface was carried out at approximately pH 1 and in the presence of 0.01 M ferric or ferrous. The atomic force microscopy (AFM) and Raman microspectroscopy analyses suggested that the chalcopyrite (112) surface was relatively inert, with no formation of elemental sulfur observed over 42 days of leaching. In addition, it was found that the distribution of Fe-S and Cu-S bonds was always negatively correlated, as revealed by Raman analysis. This suggested that the breakage of the Fe-S and Cu-S bonds did not occur concurrently at a specific reaction site. The rate of variation of surface roughness, as reflected by AFM data, also suggested that leaching of the chalcopyrite (112) surface in the ferric or ferrous solution medium likely occurred more rapidly in the initial stage (fewer than seven days) than in the later stage (after seven days). Full article
(This article belongs to the Special Issue Advances in Application of Spectroscopic Techniques for Minerals Processing)
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11 pages, 2374 KiB  
Article
Raman Spectroscopy Study of Phosphorites Combined with PCA-HCA and OPLS-DA Models
by Xiyu Yao, Huayi Hou, Huan Liang, Kai Chen and Xiangbai Chen
Minerals 2019, 9(10), 578; https://doi.org/10.3390/min9100578 - 24 Sep 2019
Cited by 10 | Viewed by 3878
Abstract
Phosphorite is a nonrenewable strategic resource, a convenient and rapid method of phosphorite grade identification and classification is important to improve phosphate utilization. In this study, Raman spectroscopy has been combined with principal component analysis and hierarchical clustering analysis (PCA-HCA) and orthogonal partial [...] Read more.
Phosphorite is a nonrenewable strategic resource, a convenient and rapid method of phosphorite grade identification and classification is important to improve phosphate utilization. In this study, Raman spectroscopy has been combined with principal component analysis and hierarchical clustering analysis (PCA-HCA) and orthogonal partial least squares-discriminant analysis (OPLS-DA) models for an investigation of different grade phosphorite samples. Both the PCA-HCA and OPLS-DA models showed that different grade phosphorite samples can be clearly distinguished by statistically analyzing the Raman spectra after smoothing, baseline correction, and first derivation. In addition, the S-line study on the OPLS-DA model clearly demonstrated that the symmetrical stretching vibrational mode of phosphate near 960 cm−1 had a much more significant contribution than other vibrational modes for the differentiation of different grade phosphorite samples. Full article
(This article belongs to the Special Issue Advances in Application of Spectroscopic Techniques for Minerals Processing)
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14 pages, 3396 KiB  
Article
Mechanism Study of Xanthate Adsorption on Sphalerite/Marmatite Surfaces by ToF-SIMS Analysis and Flotation
by Hao Lai, Jiushuai Deng, Guixia Fan, Hongxiang Xu, Wenxiang Chen, Shimei Li and Lingyun Huang
Minerals 2019, 9(4), 205; https://doi.org/10.3390/min9040205 - 29 Mar 2019
Cited by 22 | Viewed by 4349
Abstract
In this work, the active sites and species involved in xanthate adsorption on sphalerite/marmatite surfaces were studied using adsorption capacity measurements, single mineral flotation, and time-of-flight secondary ion mass spectrometry (ToF-SIMS) analysis. The effects of Fe concentration on the xanthate adsorption capacity, Cu [...] Read more.
In this work, the active sites and species involved in xanthate adsorption on sphalerite/marmatite surfaces were studied using adsorption capacity measurements, single mineral flotation, and time-of-flight secondary ion mass spectrometry (ToF-SIMS) analysis. The effects of Fe concentration on the xanthate adsorption capacity, Cu activation, and the flotation response of sphalerite/marmatite were determined. A discovery was that xanthate can interact with Fe atoms in the crystal of sphalerite/marmatite, as well as with Zn and Cu on the surface. We detected C2S2− fragment ions from dixanthogen, and dixanthogen may have been adsorbed on the surface of marmatite. The amounts of Cu and copper xanthate adsorbed on the marmatite surface were lower than those on the sphalerite surface, because Fe occupies Cu and Zn exchange sites. These results help to address the long-standing controversy regarding the products and mechanisms of xanthate adsorption on Fe-bearing sphalerite surfaces. Full article
(This article belongs to the Special Issue Advances in Application of Spectroscopic Techniques for Minerals Processing)
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