Thermophysical Properties of Ladle Slag with Different SiO2 Content
References to related material | https://doi.org/10.1007/978-3-031-80748-0_81 | |
Type of the data | Dataset | |
Type of the data | Image | |
Total size of the dataset | 2133300 | |
Author | Yehorov, Anton | |
Author | Volkova, Olena | |
Upload date | 2026-09-23T15:27:08Z | |
Publication date | 2026-09-23T15:27:08Z | |
Publication date | 2026-09-23 | |
Abstract of the dataset | The growing demand for electric vehicles, driven by global decarbonization policies, has led to an increase in the production of electric steel, which is characterized by a high silicon content. Producing this type of steel necessitates careful control of slag composition, particularly with high SiO2 content. This study investigates the thermophysical properties of cleanness slags with varying silicon oxide (SiO2) content, specifically examining viscosity, surface tension, and density. Silicon oxide, ranging from 1 to 20 wt%, was added to slags with a CaO/Al2O3 ratio of 1. The results show that increasing SiO2 content raises viscosity at temperatures above 1550 °C but reduces it at lower temperatures. Additionally, a linear decrease in density and surface tension was observed with increasing SiO2, which is attributed to the substitution of CaO with SiO2, thereby reducing the number of unsatisfied bonds in the slag network. Understanding these dynamics enhances control over slag-steel interactions in the steel ladle, ultimately improving process efficiency and steel quality. | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/2943 | |
Publisher | Technische Universität Bergakademie Freiberg | |
Specification of the discipline(s) | 4::43::405::405-01 | |
Title of the dataset | Thermophysical Properties of Ladle Slag with Different SiO2 Content | |
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 varing SiO2 content with Recyclate-Based and Environmentally Friendly Binders-Based MgO–C Refractories |