Green Technologies in Metal Recovery

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

Deadline for manuscript submissions: 30 June 2025 | Viewed by 832

Special Issue Editor


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Guest Editor
1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
2. National Engineering Research Center of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China
Interests: non-ferrous metallurgical slag; chromium slag; metallurgical dust; green recycling; comprehensive utilization

Special Issue Information

Dear Colleagues,

Non-ferrous metals are the cornerstone of high-quality development in China. The extraction of non-ferrous metals produces a large amount of metallurgical slag and dust of various shapes and metallic compositions. In the context of green and low-carbon technology, researching green comprehensive disposal methods for metallurgical slag and dust is of great significance. This Special Issue aims to gather the latest international research achievements in the green comprehensive recovery of metallurgical slag and dust and report on the latest green technologies and comprehensive disposal measures in this area.

This Special Issue focuses on the research results of various types of green recovery technologies and comprehensive disposal methods, including non-ferrous smelting slag, non-ferrous refining slag, electrolytic slag, high-arsenic antimony dust, and steelmaking chromium slag, providing a new perspective for achieving the green and efficient comprehensive utilization of metallurgical solid waste.

This Special Issue provides not only a rich theoretical basis for the academic community but also practical design guidelines for the engineering community. We cordially invite submissions from all parties, hoping for relevant researchers to provide deeper insights and solutions for the utilization of non-ferrous smelting slag, non-ferrous refining slag, electrolytic slag, high-arsenic antimony dust, and steelmaking chromium slag and promote academic exchange and cooperation in related fields. We hope that this Special Issue will lead more researchers to continue exploring this important field, improving the comprehensive utilization of metallurgical solid waste, in order to achieve a win–win situation.

Dr. Xiangfeng Kong
Guest Editor

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Keywords

  • non-ferrous metallurgical slag
  • chromium slag
  • metallurgical dust
  • green recycling
  • comprehensive utilization

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Published Papers (1 paper)

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Research

12 pages, 1501 KiB  
Article
Experimental Study on Bismuth Removal from Lead with Auxiliary Calcium Magnesium
by Linxing Deng, Haocheng Qin, Weichen Yang and Xiangfeng Kong
Metals 2025, 15(2), 156; https://doi.org/10.3390/met15020156 - 4 Feb 2025
Viewed by 592
Abstract
The separation of lead from the impurity bismuth remains a significant challenge, with achieving effective separation being a critical bottleneck in the production of high-purity lead via the vacuum gasification method. This study focuses on lead as the primary subject of investigation, conducting [...] Read more.
The separation of lead from the impurity bismuth remains a significant challenge, with achieving effective separation being a critical bottleneck in the production of high-purity lead via the vacuum gasification method. This study focuses on lead as the primary subject of investigation, conducting both theoretical and experimental research on the auxiliary conversion of lead through vacuum gasification. The calculations of the Gibbs free energy indicate that, within the temperature range of 600 to 610 K, the impurity bismuth reacts completely with calcium and magnesium, resulting in the formation of the compound CaMg2Bi2. Under optimal experimental conditions, the bismuth compound CaMg2Bi2 is converted into BiCa2. Notably, BiCa2 is nonvolatile and remains in the crucible as a residue. The auxiliary calcium is entirely transformed into CaSe and CaTe, leading to a reduction in the calcium content of the volatile substances from 0.5% to 16 ppm. Similarly, the magnesium content in the volatiles decreases from 0.66% to 187 ppm. Ultimately, the bismuth content in the final product is reduced from 6 ppm to 1.4 ppm, achieving a removal rate of 76.6%, while the direct yield of metallic lead reaches 71%. This process effectively facilitates the separation of metallic lead from the bismuth impurities. Full article
(This article belongs to the Special Issue Green Technologies in Metal Recovery)
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