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Minerals
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Advances in Valorization of Valuable Metals
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Advances in Valorization of Valuable Metals

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 (15 August 2020) | Viewed by 6313

Special Issue Editor

Prof. Dr. Željko Kamberović

E-Mail Website
Guest Editor
Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia
Interests: extractive metallurgy

Special Issue Information

Dear Colleagues,

The Special Issue on “Advances in Valorization of Valuable Metals” is to provide a unique forum, allowing researchers in this field to present their recent results. Metals, once they are captured from their mineral forms, can be repurposed indefinitely, so discussion should start from theoretical, experimental, and applied research results, having in mind that economic development in a sustainable fashion is metals-intensive. Discussion will help metallurgists and minerals technicians to adjust processes of high- and low-temperature extraction of metals from primary and secondary sources and close the loop of metals’ circulation. The dependence of companion metal availability on the production of host metals introduces a new facet of future supply risk. The development of new technologies and increasing demand of minerals and metals resources are responsible for significant tensions in the economy. Production of minor and critical metals, such as REE, PGMs, technological, or strategic metals, is crucial for achieving high performances. These metals have become significantly valuable, because of many novel technological applications and their limited availability, which reflects on scientific, social and environmental tendencies.

The Special Issue is to be a compilation of these data and discussions and is intended to help in the valorization of a large group of metals, important for society.

Prof. Željko Kamberović
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

  • metals
  • extraction
  • metallurgy
  • minerals technology
  • circular economy
  • sustainable development

Published Papers (2 papers)

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Research

29 pages, 10624 KiB  
Article
Technologically Sustainable Route for Metals Valorization from Jarosite-PbAg Sludge
by Željko Kamberović, Nataša Gajić, Marija Korać, Sanja Jevtić, Miroslav Sokić and Jovica Stojanović
Minerals 2021, 11(3), 255; https://0-doi-org.brum.beds.ac.uk/10.3390/min11030255 - 28 Feb 2021
Cited by 2 | Viewed by 2089
Abstract
By-products from zinc hydrometallurgy are classified as hazardous waste with strong leaching toxicities. Even though numerous research papers are dedicated to valorizing valuable metals in it, the primary management route is still disposal or partial reuse, such as the Waelz process. Presented experimental [...] Read more.
By-products from zinc hydrometallurgy are classified as hazardous waste with strong leaching toxicities. Even though numerous research papers are dedicated to valorizing valuable metals in it, the primary management route is still disposal or partial reuse, such as the Waelz process. Presented experimental research investigates possibilities of sulfidization and further processing as a technologically sustainable route for valuable metals valorization from non-standard jarosite-PbAg sludge. The comprehensive thermodynamic analysis was done by HSC Chemistry®, through optimizing process parameters, i.e., temperature, sulfur addition, and selection of possible additives. Technological possibility of magnetic separation, flotation, and smelting of sulfidized material was also investigated; the results were below the values that allow practical application, due to the obtained texture of sulfidized jarosite, which does not allow the liberation of minerals. Smelting tests were performed on sulfidized jarosite with sulfur and without and with carbon as additive. By smelting sulfidized jarosite-PbAg sludge with added carbon in sulfidization stage at 1375 °C, obtained products were matte, slag, raw lead, and dust in which base, critical, and slag forming components were valorized. Valuable metals were concentrated in smelting products so as to enable further processing, which also could be interesting in the case of treatment of complex, polymetallic, and refractory primary materials, which represent a significant contribution to the circular economy. Full article
(This article belongs to the Special Issue Advances in Valorization of Valuable Metals)
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11 pages, 2404 KiB  
Article
Valorization of Rare Earth Elements from a Steenstrupine Concentrate Via a Combined Hydrometallurgical and Pyrometallurgical Method
by Yunbo Yun, Srecko Stopic and Bernd Friedrich
Minerals 2020, 10(3), 248; https://0-doi-org.brum.beds.ac.uk/10.3390/min10030248 - 09 Mar 2020
Cited by 10 | Viewed by 3839
Abstract
Due to their unique characteristics, Lanthanides series (15 elements) together with scandium and yttrium are used as critical metals in numerous applications such as energy sources, catalysts, hybrid cars, medical technology, and military industry. The significance of rare earth elements has been continuously [...] Read more.
Due to their unique characteristics, Lanthanides series (15 elements) together with scandium and yttrium are used as critical metals in numerous applications such as energy sources, catalysts, hybrid cars, medical technology, and military industry. The significance of rare earth elements has been continuously increasing because the global demand for producing high-tech devices is continuously rising. The recovery of rare earth oxide from concentrate based on eudialyte and steenstrupine was performed using a hydrometallurgical and pyrometallurgical method. Eudialyte and steenstrupine are a complex Na-Ca-zirconosilicate mineral containing rare earth elements (REEs), Zr, Hf and Nb, thus serving as a potential source of Zr. Because of the presence of silica in eudialyte, the main challenge in its processing is avoiding silica gel formation, which is an unfilterable solid residue. The influence of leaching temperature, time and solid–liquid ratio on leaching efficiency was studied in laboratory conditions. A new research strategy was developed in order to recover rare earth elements using hydrochloric acid, avoiding silica gel formation. Full article
(This article belongs to the Special Issue Advances in Valorization of Valuable Metals)
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