GRK 2802: Anodes Based On MgO-C Recyclates And 316L Steel For Prospective Aluminium Fused-Salt Electrolysis Application
Type of the data | Dataset | |
Total size of the dataset | 35451981 | |
Author | Yaroshevskyi, Serhii | |
Author | Gehre, Patrick | |
Author | Kaiser, Patricia | |
Author | Brachhold, Nora | |
Author | Hubálková, Jana | |
Author | Aneziris, Christos G. | |
Upload date | 2026-06-25T09:18:31Z | |
Publication date | 2026-06-25T09:18:31Z | |
Publication date | 2026-06-25 | |
Abstract of the dataset | Every year, approx. 28 million tons of used refractories accumulate worldwide. The majority of them are used as aggregates for road construction (downcycling) or are deposited in landfills. For ecological and economic reasons, an increased research potential was identified in recent years, dedicated to increasing the recycling rate and finding new markets and application fields with a higher value of the refractory recyclates. The study presents the current findings of the development of inert electrodes for the aluminum fused-salt electrolysis composed of steel and MgO gained from MgO-C recyclates. To withstand the chemical attack of molten aluminum and cryolitic melts, the metal-ceramic composites were preoxidized (PO) at 800 °C, 900 °C, and 1000 °C. The microstructure after each PO thermal treatment was analyzed. After PO at 800 °C, a (Cr,Fe)3O4 spinel-like phase and Fe-O Mg-O solid solution form. After PO at 900 °C, a larger amount of the Fe-O Mg-O solid solution and a (Cr,Fe)2O3 solid solution around the steel grains was identified. Furthermore, the electrical conductivity of the metal-ceramic-composites preoxidized at 900 °C amounts to 1.49·10^2 S/cm and hence is in the range of carbon, which exhibits a value of 1.54·10^2 S/cm. Additionally, the impact of different preoxidation treatments at 900 °C by applying furnaces equipped with electrical heating, natural gas burner, and microwave plasma burner on the microstructure was investigated. | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/2765 | |
Publisher | Technische Universität Bergakademie Freiberg | |
Specification of the discipline(s) | 4::43 | |
Specification of the discipline(s) | 4::43::405::405-05 | |
Title of the dataset | GRK 2802: Anodes Based On MgO-C Recyclates And 316L Steel For Prospective Aluminium Fused-Salt Electrolysis Application | |
Project abstract | This research aims to investigate the potential of upcycling spent MgO-C refractories as a ceramic feedstock for steel-ceramic composite materials intended for application as carbonless anodes in aluminium electrolysis. The work focuses on developing a reproducible processing route for recyclate-based MgO-steel composites and on establishing structure-processing relationships relevant to electrochemical operation in cryolitic environments. Particular attention is given to the controlled pre-oxidation treatments, and phase evolution on electrical conductivity of the composite material and chemical interaction with the electrolyte. Through systematic materials characterization and electrochemical exposure under laboratory conditions, the project seeks to identify the key degradation mechanisms governing composite anode behaviour and to delineate the design constraints and opportunities for integrating refractory recycling strategies into inert-anode development. | |
Funding Acknowledgement | The dataset was generated within the framework of the Research Training Group GRK 2802 (project ID: 461482547) funded by the German Research Foundation (DFG). | |
Public project website(s) | https://tu-freiberg.de/en/research/grk2802 | |
Project title | GRK2802_P7_Metalloceramic composites made from MgO or MgO-C recyclates in combination with steel and other additives as inert or low-carbon anodes in aluminium fused-salt electrolysis |