Recent Advances in Metallurgical Extractive Processes, 2nd Volume

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closed (25 November 2024)

Manuscript submission deadline

25 January 2025

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Topic Information

Dear Colleagues,

Due to the accelerated growth in the population and emerging economies, there is a high demand for critical metals, which are indispensable for manufacturing advanced technology, green technology, and the development of emerging industries. Mining extractive processes are fundamental activities for the production of raw materials and the economies of several countries. For example, copper mining contributes 10% of the GDP in Chile and generates more than 500,000 jobs. However, at present, this industry is facing varied challenges, such as the following:

• A decrease in average mineral grades;
• Complex mineralogies with a high presence of gangue and clays;
• Subsequent increases in production costs;
• Excessive generation of environmental liabilities, mainly flotation tailings;
• Scarcity of aquifer water and government restrictions for its use in production processes;
• A need to reduce the costs of electrical supply. As a result, it then becomes necessary to generate novel extractive metallurgical processes that must focus on the following:
• Increasing the recovery of metals from conventional processes;
• Diversifying the extraction of other elements and obtain byproducts from the main commodity that can be exploited (one example is the enormous growth in the molybdenum industry, which is obtained as a byproduct of copper flotation processes);
• Generating new operational strategies for essential resources, such as water and electricity;
• Reusing industrial waste and establishing procedures for its remediation.

We cordially invite the submission of scientific articles to this Topic that are focused on the research areas of leaching, solvent extraction, electrowinning, flotation, thickening, pyrometallurgy, and waste treatment and reuse.

Dr. Norman Toro
Dr. Edelmira Gálvez
Dr. Ricardo Jeldres
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
ChemEngineering ChemEngineering	2.8	4.0	2017	29.6 Days	CHF 1600	Submit
Compounds compounds	-	2.3	2021	40.1 Days	CHF 1000	Submit
Materials materials	3.1	5.8	2008	15.5 Days	CHF 2600	Submit
Metals metals	2.6	4.9	2011	16.5 Days	CHF 2600	Submit
Alloys alloys	-	-	2022	19.4 Days	CHF 1000	Submit
Mining mining	-	2.8	2021	19.6 Days	CHF 1000	Submit

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15 pages, 12488 KiB  

Open AccessArticle

Co-Extraction of Aluminum and Silicon and Kinetics Analysis in Carbochlorination Process of Low-Grade Bauxite

by Xinxin Zhao, Yan Liu, Long Wang, Yutong Hua, Tianhao Cheng, Tingan Zhang and Qiuyue Zhao

Materials 2024, 17(14), 3613; https://doi.org/10.3390/ma17143613 - 22 Jul 2024

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Abstract

Addressing the issue that the Bayer process is not suitable for low-grade bauxite, carbochlorination was proposed to recover aluminum and silicon from low-grade bauxite. This study focused on the behavior of aluminum and silicon during the carbochlorination process of low-grade bauxite. The impact [...] Read more.

Addressing the issue that the Bayer process is not suitable for low-grade bauxite, carbochlorination was proposed to recover aluminum and silicon from low-grade bauxite. This study focused on the behavior of aluminum and silicon during the carbochlorination process of low-grade bauxite. The impact of various process parameters on the chlorination efficiency was investigated, and the chlorination mechanism and kinetics of aluminum and silicon chlorination in bauxite were analyzed and discussed. Under optimal experimental conditions, the chlorination efficiency of Al₂O₃ and SiO₂ reached 94.93% and 86.32%, respectively. The carbochlorination of aluminum and silicon in bauxite adhered to a shrinking, unreacted core model governed by gas diffusion within the product layer. This process can be bifurcated into two stages. Additionally, calculations were conducted to determine the apparent activation energy and reaction order of the chlorination processes involving Al₂O₃ and SiO₂. Examining the chlorination mechanism revealed that the bauxite carbochlorination encompasses transformations among various minerals. Notably, the aluminum component prefers to participate in the carbothermal chlorination reaction over silicon. Full article

(This article belongs to the Topic Recent Advances in Metallurgical Extractive Processes, 2nd Volume)

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