Special Issue "Cleaner Production in Mineral Processing"

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

Deadline for manuscript submissions: 15 April 2020.

Special Issue Editor

Guest Editor
Prof. Dr. Luis A. Cisternas Website E-Mail
Department of Chemical Engineering and Mineral Process, Universidad of Antofagasta, Antofagasta, Chile
Interests: modeling; design; optimization; uncertainty; flotation; heap leaching; tailing; seawater

Special Issue Information

Dear Colleagues,

The most pressing environmental problems of base metals production are solid waste production, gaseous emissions, and high energy use. Most of the present solutions to clean up post-mining base metals production can be characterized as incremental, end-of-pipe technologies. More sophisticated, radical solutions are scarcely implemented. This Special Issue on Cleaner Production in Mineral Processing focuses on strategies and technologies to identify options to minimize waste and emissions out of the mineral processes through source reduction. Examples are technologies to reduce the effect of tailing by modification of the process to avoid fine particles and acid mine drainage agents in the tailing. Other examples are the reuse of waste, new process and technologies with low waste, and substitution of raw material and energy by renewable material and energy. The development of cleaner production is essential for the adoption of a circular economy.

Prof. Dr. Luis A. Cisternas
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 papers will be 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 1400 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

  • Waste reduction
  • Tailing
  • Circular economy
  • Substitution of raw material by renewable material
  • Substitution of energy by renewable energy

Published Papers (2 papers)

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Research

Open AccessArticle
Extraction of Boron from Ludwigite Ore: Mechanism of Soda-Ash Roasting of Lizardite and Szaibelyite
Minerals 2019, 9(9), 533; https://doi.org/10.3390/min9090533 - 31 Aug 2019
Abstract
Ludwigite ore is a typical low-grade boron ore accounting for 58.5% boron resource of China, which is mainly composed of magnetite, lizardite and szaibelyite. During soda-ash roasting of ludwigite ore, the presence of lizardite hinders the selective activation of boron. In this work, [...] Read more.
Ludwigite ore is a typical low-grade boron ore accounting for 58.5% boron resource of China, which is mainly composed of magnetite, lizardite and szaibelyite. During soda-ash roasting of ludwigite ore, the presence of lizardite hinders the selective activation of boron. In this work, lizardite and szaibelyite were prepared and their soda-ash roasting behaviors were investigated using thermogravimetric-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), and scanning electron microscope and energy dispersive spectrometer (SEM-EDS) analyses, in order to shed light on the soda-ash activation of boron within ludwigite ore. Thermodynamics of Na2CO3-MgSiO3-Mg2SiO4-Mg2B2O5 via FactSage show that the formation of Na2MgSiO4 was preferential for the reaction between Na2CO3 and MgSiO3/Mg2SiO4. While, regarding the reaction between Na2CO3 and Mg2B2O5, the formation of NaBO2 was foremost. Raising temperature was beneficial for the soda-ash roasting of lizardite and szaibelyite. At a temperature lower than the melting of sodium carbonate (851 °C), the soda-ash roasting of szaibelyite was faster than that of lizardite. Moreover, the melting of sodium carbonate accelerated the reaction between lizardite with sodium carbonate. Full article
(This article belongs to the Special Issue Cleaner Production in Mineral Processing)
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Open AccessArticle
A Clean Process to Prepare High-Quality Acid-Soluble Titanium Slag from Titanium Middling Ore
Minerals 2019, 9(8), 460; https://doi.org/10.3390/min9080460 - 27 Jul 2019
Abstract
A direct reduction-magnetic separation-alkali leaching-dilute acid washing method was proposed to prepare high-quality acid-soluble titanium slag (HQASTS) from titanium middling ore. The relevant potential pH diagrams were built, and the analysis results showed that the pH values for alkali leaching and dilute acid [...] Read more.
A direct reduction-magnetic separation-alkali leaching-dilute acid washing method was proposed to prepare high-quality acid-soluble titanium slag (HQASTS) from titanium middling ore. The relevant potential pH diagrams were built, and the analysis results showed that the pH values for alkali leaching and dilute acid washing should be higher than 13.50 and lower than 1.00, respectively. Increasing temperature was beneficial to alkali leaching but not to dilute acid washing. The effects of operating parameters on the TiO2 content and impurity oxides extraction ratios of titanium slag were investigated, and the optimal experimental conditions were obtained. The HQASTS was obtained with TiO2 and Fe2O3 content of 75.37 wt % and 0.96 wt %, respectively, under the above conditions. Furthermore, the leaching mechanism was studied by chemical analysis and X-ray diffraction (XRD) technology, and it was found that the alkali leaching-dilute acid washing process presented in this work could avoid the encapsulation of the unreacted anorthite by the calcium aluminum spinel generated in alkali leaching. Full article
(This article belongs to the Special Issue Cleaner Production in Mineral Processing)
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