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Advances in Mineral Processing, Waste Recycling and Extractive Metallurgy (Second...
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Advances in Mineral Processing, Waste Recycling and Extractive Metallurgy (Second Edition)

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: closed (20 February 2024) | Viewed by 1735

Special Issue Editors

Dr. Dmitry Valeev

E-Mail Website
Guest Editor
Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academу of Sciences, Moscow 119991, Russia
Interests: coal fly ash; high-silica bauxite; red mud; bauxite residue;aluminium dross; alumina production; coagulant polyaluminum chloride; high-pressure acid leaching (HPAL); flotation; magnetic separation; carbothermic reduction; mineral processing; non-ferrous metals extraction; waste utilization.
Special Issues, Collections and Topics in MDPI journals
Dr. Jinhe Pan

E-Mail Website
Guest Editor
School of Chemical Engineering and Technology (SCET), China University of Mining and Technology (CUMT), Xuzhou, China
Interests: mineral processing; trace element occurrence; hydrometallurgy; critical raw materials; utilization of coal combustion waste
Special Issues, Collections and Topics in MDPI journals
Dr. Yuancheng Li

E-Mail Website
Guest Editor
College of Agriculture and Biological Sciences, Dali University, Key Laboratory of Ecological Microbial Remediation Technology of Yunnan Higher Education Institutes, Dali University, Dali 671003, China
Interests: fly ash; arsenic-bearing solid waste; metallurgical slags; heavy metal solid waste; solidification/stabilization (S/S) technologies; immobilization mechanism; waste utilization.

Special Issue Information

Dear Colleagues,

The permanent growth of the world economy and industry stimulates a constantly increasing production of ferrous and non-ferrous metals, while the depletion of natural resources leads to demands for the development of new technologies for the processing of low-grade ores and for deep recycling of metallurgical and other anthropogenic wastes. These new technologies in materials processing and waste recovery will play a major role in creating a sustainable future for humankind.

This Special Issue is devoted to the most relevant research in pyro- and hydrometallurgy methods for the extraction and recycling of ferrous and non-ferrous metals, including related studies of the chemical/phase composition and physical properties of the obtained products (concentrates, slags, metals, oxides, solutions, salts, etc.).

Dr. Dmitry Valeev
Dr. Jinhe Pan
Dr. Yuancheng Li
Guest Editors

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. Materials is an international peer-reviewed open access semimonthly 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

  • bauxite
  • titanomagnetite
  • classification
  • magnetic separation
  • flotation
  • hydrometallurgy
  • acid or alkali leaching
  • bio-hydrometallurgy
  • resin sorption
  • solvent extraction
  • ionic liquids
  • crystallization
  • precipitation
  • pyrometallurgy
  • preliminary roasting
  • reductive smelting
  • calcination
  • rare-earth element (REE) ores
  • lithium extraction
  • thermodynamics and kinetics
  • green chemistry/process
  • waste management
  • low-grade resources
  • slag
  • coal gangue
  • electric arc furnace
  • red mud
  • bauxite residue
  • tailings
  • coal fly ash
  • aluminum dross
  • industrial wastes and by-products

Published Papers (2 papers)

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Research

29 pages, 10332 KiB  
Article
Investigation of Liquid–Liquid Reaction Phenomena of Aluminum in Calcium Silicate Slag
by Harald G. R. Philipson, Maria Wallin and Kristian Etienne Einarsrud
Materials 2024, 17(7), 1466; https://doi.org/10.3390/ma17071466 - 22 Mar 2024
Viewed by 527
Abstract
To achieve better process control of silicon (Si) alloy production using aluminum as a reductant of calcium silicate (CaO-SiO2) slag, it is necessary to understand the reaction phenomena concerning the behavior of formed phases at the metal-slag interface during conversion. The [...] Read more.
To achieve better process control of silicon (Si) alloy production using aluminum as a reductant of calcium silicate (CaO-SiO2) slag, it is necessary to understand the reaction phenomena concerning the behavior of formed phases at the metal-slag interface during conversion. The interfacial interaction behavior of non-agitated melt was investigated using the sessile drop method for varying time and temperature, followed by EPMA phase analysis at the vicinity of the metal–slag interface. The most remarkable features of the reaction were the accumulation of solid calcium aluminate product layers at the Al alloy–slag interface and spontaneous emulsion of Si-alloy droplets in the slag phase. The reduction is strictly limited at 1550 °C due to the slow transfer of calcium aluminates away from the metal-slag interface into the partially liquid bulk slag. Reduction was significantly improved at 1600–1650 °C despite an interfacial layer being present, where the conversion rate is most intense in the first minutes of the liquid–liquid contact. A high mass transfer rate across the interface was shown related to the apparent interfacial tension depression of the wetting droplet along with a significant perturbed interface and emulsion due to Kelvin–Helmholtz instability driven by built-up interfacial charge at the interface. The increased reaction rate observed from 1550 °C to 1600–1650 °C for the non-agitated melt was attributed to the advantageous physical properties of the slag phase, which can be further regulated by the stoichiometry of metal–slag interactions and the composition of the slag. Full article
(This article belongs to the Special Issue Advances in Mineral Processing, Waste Recycling and Extractive Metallurgy (Second Edition))
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13 pages, 3289 KiB  
Article
High-Grade Ferronickel Concentrates Prepared from Laterite Nickel Ore by a Carbothermal Reduction and Magnetic Separation Method
by Jingzhe Zhang, Chang Cao, Zhengliang Xue, Faliang Li, Shaoping Li, Hongjuan Duan and Haijun Zhang
Materials 2023, 16(22), 7132; https://doi.org/10.3390/ma16227132 - 11 Nov 2023
Viewed by 776
Abstract
Nickel is widely used in industrial processes and plays a crucial role in many applications. However, most of the nickel resource mainly exists as nickel oxide in laterite nickel ore with complex composition, resulting in difficulty in upgrading the nickel content using physical [...] Read more.
Nickel is widely used in industrial processes and plays a crucial role in many applications. However, most of the nickel resource mainly exists as nickel oxide in laterite nickel ore with complex composition, resulting in difficulty in upgrading the nickel content using physical separation methods. In this study, high-grade ferronickel concentrates were obtained through a carbothermal reduction and magnetic separation using laterite nickel ore and anthracite as raw materials. The effects of different types of additives (CaF2, Na2SO4, and H3BO3), carbon ratio (the molar ratio of oxygen atoms in the laterite nickel ore to carbon atoms in anthracite), and grinding time on the recoveries and grades of ferronickel concentrates were experimentally investigated, along with the microstructure and chemical composition of the products. CaF2 was proved to be the primary active additive in the aggregation and growth of the ferronickel particles and the improvement of the grade of the product. Under the optimal conditions of CaF2 addition of 9.85 wt%, carbon ratio of 1.4, and grinding time of 240 s, high-grade magnetically separable ferronickel concentrate with nickel grade 8.93 wt% and iron grade 63.96 wt% was successfully prepared. This work presents a practical method for the highly efficient recovery and utilization of iron and nickel from low-grade laterite nickel ore, contributing to the development of strategies for the sustainable extraction and utilization of nickel resources. Full article
(This article belongs to the Special Issue Advances in Mineral Processing, Waste Recycling and Extractive Metallurgy (Second Edition))
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