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Resource utilization strategies for spent pot lining: A review of the current state
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China.
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China.
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.ORCID iD: 0000-0002-2265-6321
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2022 (English)In: Separation and Purification Technology, ISSN 1383-5866, E-ISSN 1873-3794, Vol. 300, article id 121816Article, review/survey (Refereed) Published
Abstract [en]

During a long-term operation of the aluminum electrolysis cell, the molten salts continuously infiltrate and corrode the pot lining, resulting in a huge amount of hazardous waste after the overhaul. The first cut of spent pot linings (SPL) contains several carbon-rich materials with potential economic value and hazardous matters such as soluble fluorite and cyanide. The continuous accumulation and disposal of SPL in depots or landfills have created a severe challenge to the aluminum industry. Nowadays, the technologies of harmless disposal and resource utilization of SPL have been paid more attention. This work has explored and presented the properties of SPL (including chemical, physical, and thermodynamic properties, etc.) and methods for its detoxification and purification. In this regard, the resource utilization strategies of SPL are systematically sorted out from three aspects: traditional, co-processing, and high-value technologies. In the end, the current challenges and future perspectives for the environmental recycling of SPL have been analyzed and summarized.

Place, publisher, year, edition, pages
Elsevier, 2022. Vol. 300, article id 121816
Keywords [en]
Spent pot lining, Resource utilization, Hazard, Co-processing strategies, High-value strategies
National Category
Environmental Management
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-92369DOI: 10.1016/j.seppur.2022.121816ISI: 000849814900002Scopus ID: 2-s2.0-85135351676OAI: oai:DiVA.org:ltu-92369DiVA, id: diva2:1685724
Note

Validerad;2022;Nivå 2;2022-08-04 (hanlid);

Funder: Key Scientific Research Projects in Colleges and Universities of Henan Province, China (22A450003)

Available from: 2022-08-04 Created: 2022-08-04 Last updated: 2025-02-10Bibliographically approved

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Chelgani, Saeed Chehreh

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