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Minerals
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Synthesis, Properties and Applications of Metallurgical Waste-Modified Materials in Construction...
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Synthesis, Properties and Applications of Metallurgical Waste-Modified Materials in Construction Industry

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Environmental Mineralogy and Biogeochemistry".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 3610

Special Issue Editors

Dr. Tebogo Mashifana

E-Mail Website
Guest Editor
Department of Chemical Engineering, University of Johannesburg, P.O. Box 17011, Doornfontein 2088, South Africa
Interests: pollution control of industrial solid waste and effluent; biomaterials; solid waste valorization; waste to resource; circular economy
Dr. Nastassia Thandiwe Sithole

E-Mail Website
Guest Editor
Department of Chemical Engineering, University of Johannesburg, P.O. Box 17011, Doornfontein 2088, South Africa
Interests: industrial by-products and waste valorization; circular economy and wastewater treatment
Dr. Bolanle Deborah Ikotun

E-Mail Website
Guest Editor
Department of Civil Engineering, College of Science, Engineering and Technology, University of South Africa (UNISA), Pretoria 0003, South Africa
Interests: materials characterization; concrete mechanical and durability properties testing; concrete quality optimization techniques; concrete optimization using agricultural and industrial waste materials

Special Issue Information

Dear Colleagues,

As part of most countries' development and economy, the metallurgical industry, both hydrometallurgy and pyrometallurgy, significantly contributes to gross domestic product. The greatest challenge for the industry is the generation of voluminous waste and by-products, which are normally disposed of in landfills and dumps. When waste and by-products are disposed of in the environment, they cause environmental pollution and contamination of the air, water, and land. There is a need to develop innovative, cost-effective, environmentally friendly solutions to address this challenge. Over the years, researchers have investigated technologies and processes to beneficiate and valorize these materials for applications in the building and construction sector. This Special Issue focuses on and present innovative worldwide research that aims to synthesize, modify, stabilize, and study the properties of metallurgical waste and by-products for applications in the construction sector, contributing towards addressing the following Sustainable Development Goals: 12: Responsible consumption and production and 13: Climate change.

This Special Issue is seeking (but not limited to) articles related to the following research areas:

  • Geochemical and geotechnical properties of metallurgical waste or by-products for construction.
  • Treatment and stabilization of metallurgical waste or by-products for construction.
  • Modification of metallurgical waste or by-products for construction.
  • Resource recovery from metallurgical waste or by-products.
  • Sustainable materials from metallurgical wastes or by-products for construction.
  • Characterization of waste-modified materials for construction.
  • Applications of waste-modified materials for construction.

Dr. Tebogo Mashifana
Dr. Nastassia Thandiwe Sithole
Dr. Bolanle Deborah Ikotun
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. 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

  • waste valorization
  • geopolymers
  • waste disposal
  • circular economy
  • green building materials

Published Papers (2 papers)

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Research

23 pages, 11895 KiB  
Article
Behaviors of Silicon, Aluminum and Iron and Kinetics of Silicon from the Roasted Clinker of Silver Tailings in Water–Acid Leaching Process
by Jie Chang, Aifang Pan, Yuzhao Ma, Yue Sun and Shentao Hu
Minerals 2023, 13(1), 105; https://doi.org/10.3390/min13010105 - 09 Jan 2023
Cited by 3 | Viewed by 1506
Abstract
In order to achieve efficient resource utilization of metal tailings, taking the roasted clinker of silver tailings (RCST) as the object, the dissolution behaviors of Si, Al and Fe in the water–acid two-stage leaching process and the water leaching kinetics of Si were [...] Read more.
In order to achieve efficient resource utilization of metal tailings, taking the roasted clinker of silver tailings (RCST) as the object, the dissolution behaviors of Si, Al and Fe in the water–acid two-stage leaching process and the water leaching kinetics of Si were investigated in this study. Single-factor experiments were performed to investigate the effects of the leaching parameters; the XRF, XRD and SEM-EDS methods were used to characterize the leaching residues with different leaching times, and the leaching kinetics models of Si were established. The results demonstrate that, in the water leaching stage, the sodium silicate and a small part of the structurally unstable sodium aluminosilicate in RCST are dissolved, while the nepheline, most of the sodium aluminosilicate and the mixed materials containing iron enter the water leaching residue. The first 5 min of water leaching is controlled by both interfacial transfer and diffusion across the product layer, with an apparent activation energy of 22.36 kJ/mol, and the dissolution reaction during 5–15 min is controlled by the unsteady diffusion of the liquid film, with an apparent activation energy of 14.22 kJ/mol. The structure of the materials in the clinker is completely destroyed, and a great number of fissures and pores are produced by the continued dissolving action of the water. Thus, in the acid leaching stage, the amorphous Si-, Al- and Fe-containing substances in the water leaching residue are rapidly dissolved in the sulfuric acid solution at a lower temperature. Full article
(This article belongs to the Special Issue Synthesis, Properties and Applications of Metallurgical Waste-Modified Materials in Construction Industry)
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15 pages, 3937 KiB  
Article
Application of Attainable Region Technique to Optimize Copper Slag’s Desired Size Class
by Tlotlo Solomon Gabasiane, Gwiranai Danha, Tirivaviri Mamvura, Tebogo Mashifana and Vusumuzi Sibanda
Minerals 2023, 13(1), 19; https://doi.org/10.3390/min13010019 - 23 Dec 2022
Viewed by 1580
Abstract
Copper slag is a hard material produced from smelting copper-bearing ores. Over the years, research has prioritized utilizing slag as a secondary source of base metals. This paper focuses on the grinding/milling of copper slag collected from the BCL Mine in Botswana to [...] Read more.
Copper slag is a hard material produced from smelting copper-bearing ores. Over the years, research has prioritized utilizing slag as a secondary source of base metals. This paper focuses on the grinding/milling of copper slag collected from the BCL Mine in Botswana to obtain a maximum amount of material in the desired size class with minimal energy consumption. This will then be followed by an integrated flotation and leaching approach of the desired size class material to recover copper. Our objectives are to determine the grinding time, ball loading, mill filling and desired size class for maximum recovery of copper mineral. The attainable region technique is an equipment-independent optimization tool employed here to determine the optimal specifications of our experimentally manipulated variables to satisfy the set objective function. Full article
(This article belongs to the Special Issue Synthesis, Properties and Applications of Metallurgical Waste-Modified Materials in Construction Industry)
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