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Metals
Special Issues
Separation and Purification of Metals (Second Edition)
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Separation and Purification of Metals (Second Edition)

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Extractive Metallurgy".

Deadline for manuscript submissions: closed (31 May 2024) | Viewed by 361

Special Issue Editor

Prof. Dr. Guihong Han

E-Mail Website
Guest Editor
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
Interests: ion flotation; precipitation flotation; floating extraction; deep separation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to announce a Special Issue of Metals (ISSN 2075-4701), entitled “Separation and Purification of Metals (Second Edition)”. In the past decades, many attempts have been made to optimize the extraction, separation, and purification of metals from abundant natural mineral or ore resources. With the rapid development of human industrialization, some metal and metal-based secondary resources can also be generated during successive material preparation, fabrication, and application processes. These types of secondary resources with high-value metals also show great recovery potential. However, clean extraction, separation, and purification of these metals, especially for rare metals with low or ultra-low concentrations, is extremely difficult. Currently, diverse processes for the separation and purification of metals from natural minerals or ores and from secondary resources are urgently needed.

This Special Issue will contain articles reporting new and progressive research results as well as reviews on fundamental aspects in the study of the separation and purification of metals and their applications. Manuscripts from both fundamental scientific researchers and authors from industrial companies involved in the field are welcome.

Prof. Dr. Guihong Han
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. Metals 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 2600 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

  • selective separation
  • solvent extraction
  • microbubble flotation
  • adsorption
  • ion exchange
  • rare metal
  • hydrometallurgy
  • pyrometallurgy
  • electrometallurgy
  • biometallurgy

Published Papers (1 paper)

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Research

14 pages, 1249 KiB  
Article
On the Problem of the Distillation Separation of Secondary Alloys of Magnesium with Zinc and Magnesium with Cadmium
by Valeriy Volodin, Bagdaulet Kenzhaliyev, Sergey Trebukhov, Alina Nitsenko, Xeniya Linnik and Alexey Trebukhov
Metals 2024, 14(6), 671; https://doi.org/10.3390/met14060671 - 5 Jun 2024
Viewed by 72
Abstract
An alternative to the existing method of processing secondary magnesium raw materials by remelting in a salt furnace can be distillation separation into volatile metals (Mg, Zn and Cd), low-volatile metals (Al, Mn and Zr) and rare earth elements. The separation of metals [...] Read more.
An alternative to the existing method of processing secondary magnesium raw materials by remelting in a salt furnace can be distillation separation into volatile metals (Mg, Zn and Cd), low-volatile metals (Al, Mn and Zr) and rare earth elements. The separation of metals may be tracked based on phase diagrams where the field boundaries of the vapor–liquid equilibrium are plotted. Due to the fact that Mg, Zn and Cd have comparable saturated vapor pressures, the possibility of the distillation separation of Mg–Zn and Mg–Cd systems using full state diagrams including the melt–vapor phase transition boundaries were determined in this work. The boundaries of these systems were calculated based on the partial values of saturated vapor, determined by the boiling point method, and presented in the form of temperature–concentration dependencies with the indicated boundaries. The field boundaries were calculated (L + V) at atmospheric pressure (101.33 kPa) and in vacuum (1.33 kPa and 0.7 kPa,) supposing the implementation of the process. The possibility of the separate extraction of zinc and cadmium from magnesium was considered using complete phase diagrams including the boundaries of the melt–steam phase transition. When considering the boundaries of the vapor–liquid equilibrium in the binary systems Mg–Zn and Mg–Cd, it was established that it is impossible to separate metals in one “evaporation–condensation” cycle in a vacuum of 1.33 and 0.7 kPa. The problem is caused by the small size of the fields (L + V) at the temperature, which suggests processes of the re-evaporation of the condensate from the previous distillation stage. The separation of zinc and cadmium from liquid alloys with magnesium under equilibrium conditions requires several repetitions of the condensate distillation process. In non-equilibrium conditions, the real processes will require a larger number of conversions. This implies the expediency of the joint evaporation of magnesium with zinc and cadmium and the use of condensate for additional charging to liquid magnesium, and the remainder of the distillation, where volatile metals such as Al, Mn, Zr and rare earth elements will be concentrated, should be directed to the preparation of ligatures for special magnesium-based alloys. Full article
(This article belongs to the Special Issue Separation and Purification of Metals (Second Edition))
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