GRK 2802: Interaction of Ladle Slag With Varying SiO2 Content and Recyclate-Based MgO–C Refractories
References to related material | https://doi.org/10.1002/adem.202502888 | |
Type of the data | Dataset | |
Type of the data | Image | |
Total size of the dataset | 120778312 | |
Author | Yehorov, Anton | |
Author | Salpagarov, Eldar | |
Author | Mospan, Anhelina | |
Author | Stadtmüller, Till Manon Jannis | |
Author | Schemmel, Thomas | |
Author | Aneziris, Christos G. | |
Author | Volkova, Olena | |
Upload date | 2026-09-23T15:27:05Z | |
Publication date | 2026-09-23T15:27:05Z | |
Publication date | 2026-09-23 | |
Abstract of the dataset | Industrial MgO–C refractories fabricated from either pure fuzed magnesia (R0) or 50 wt% recycled MgO–C (R50) were exposed to ladle slags (C/A = 1) with varying SiO2 content (1–20 wt%). Wetting and infiltration behaviors were investigated using the sessile drop method at 1600°C under an Ar atmosphere for different dwell times. Quenched slag–refractory interfaces were characterized by SEM-EDX and compared with phase equilibrium simulations using FactSage 8.1. Increasing SiO2 content at 1600°C reduced slag density and surface tension, increased viscosity, and shifted saturation from MgO to MgAl2O4 spinel. During heating, R50 samples exhibited more intense gas formation. This delayed wetting and significantly slowed the initial stage of slag infiltration. Upon contact with recycled-based refractories, the high-SiO2 slag formed a dense, 195 μm-thick MgAl2O4-rich layer, entrapping residual calcium-silicate slag and serving as an in situ protective barrier against further oxidation and corrosion. These results demonstrate that well-processed MgO–C recyclate can inhibit slag attack, first by delaying infiltration via transient gas release, and subsequently by promoting a protective spinel layer under suitable slag compositions. Furthermore, the findings highlight the influence of substrate carbon content and open porosity on the slag’s melting and infiltration behavior. | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/2941 | |
Publisher | Technische Universität Bergakademie Freiberg | |
Specification of the discipline(s) | 4::43::405::405-01 | |
Specification of the discipline(s) | 4::43::405::405-05 | |
Title of the dataset | GRK 2802: Interaction of Ladle Slag With Varying SiO2 Content and Recyclate-Based MgO–C Refractories | |
Project abstract | The doctoral research project P4-II within the research training group GRK2802 focuses on the interaction between ladle slags with varying SiO2 content and industrially manufactured MgO–C refractories based on recyclates and environmentally friendly binders, supplied by the industrial partner Refratechnik Steel GmbH. In the first step, five synthetic ladle "cleanness" slags with a CaO/Al2O3 ratio of 1 and SiO2 contents of 1, 5, 10, 15, and 20 wt% are characterized with respect to their thermophysical properties: density, surface tension, viscosity, and thermal conductivity. The experimental data are complemented by thermodynamic calculations with FactSage and by quenching experiments, which confirm the morphological changes and the MgO solubility in the slags with increasing SiO2 content. In the second step, the slags are brought into contact with three MgO–C grades: a reference material produced exclusively from virgin raw materials, a material containing 50 wt% MgO–C recyclate, and a material containing 50 wt% MgO–C recyclate bonded with an environmentally friendly binder. The aim of this step is to relate slag properties and refractory composition to wetting, infiltration, corrosion, and the formation of protective reaction layers. In the third step, the investigation is extended to the three-phase system of slag, steel, and refractory, in which Marangoni flows at the slag–steel–refractory contact zone change the corrosion behavior compared to the slag–refractory system alone. The results are intended to assess the suitability of recyclate- and eco-binder-based MgO–C bricks for the steel ladle. | |
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_P4_Interaction of ladle slag with varying SiO2 content with Recyclate-Based and Environmentally Friendly Binders-Based MgO–C Refractories |