GRK 2802: MgO-C Ladle Bricks based on Recyclates and Lignin-Collagen-Fructose Binder System
Type of the data | Image | |
Type of the data | Text | |
Total size of the dataset | 469278 | |
Author | Gehre, Patrick | |
Author | Gunasekar, Dinesh Kumar | |
Author | Hubálková, Jana | |
Author | Aneziris, Christos | |
Upload date | 2026-09-25T15:06:41Z | |
Publication date | 2026-09-25T15:06:41Z | |
Publication date | 2026-09-25 | |
Abstract of the dataset | Every year, approx. 28 million tons of used refractories accrue worldwide. After their break out, the majority of them are used in subordinate application fields such as aggregates for road construction (downcycling) or deposited in landfills. Their recycling in the field of refractory materials played an underpart so far. For ecological and economic reasons, an increased research potential was identified in the last years consecrated to increasing the recycling rate of refractories and finding new markets and application fields with higher value for them. The study presents current findings of a long-term research training group addressing (amongst others) the development of MgO-C ladle bricks containing MgO-C recyclates and being bonded with pitch- and resin-free environmentally friendly binders. So far, the favored batches contained an oxidic grain fraction composed of 40.5 wt.-% fused MgO raw material, 40.5 wt.-% MgO-C recyclates, 14 wt.-% sintered magnesia (DBM) raw material together with 5 wt.-% graphite and optional antioxidants (TiO2, Al, SiO2). A binder system composed of a mixture of lignin, collagen, and polyethylene glycol (PEG) was developed. The latter served as a pressing aid and was necessary due to the absence of liquid resin in the batch. Even after a considerable and auspicious optimization during previous studies, this basic batch containing recyclates and no pitch or resin does not meet the physical and mechanical properties of standard industrial bricks. Hence, in the present study, the binder system was enhanced by using varying amounts of lignin, collagen, and tannin together with polyethylene glycol, fructose, and citric acid addition. The new developed MgO-C mixtures were pressed uniaxially, dried, cured, and carbonized at 1000 °C. It has been found that polyethylene glycol, which impairs the material properties, can be omitted using sufficient amounts of fructose. The addition of citric acid leads to a further increase in CCS. Consequently, actual optimized environmentally friendly MgO-C batches show a CCS of 85 % of the value of industrial pitch- and resin-bonded bricks without recyclates. | |
Public reference to this page | https://opara.zih.tu-dresden.de/handle/123456789/2959 | |
Public reference to this page | https://doi.org/10.25532/OPARA-1578 | |
Publisher | Technische Universität Bergakademie Freiberg | |
Licence | CC0 1.0 Universal | en |
URI of the licence text | http://creativecommons.org/publicdomain/zero/1.0/ | |
Specification of the discipline(s) | 4 | |
Title of the dataset | GRK 2802: MgO-C Ladle Bricks based on Recyclates and Lignin-Collagen-Fructose Binder System | |
Project abstract | Research into a new generation of carbon-bonded products based primarily on gelatine with possible tannin or lactose additives with Al2O3-C and MgO-C recyclates is developing a novel approach to 'Green Refractories'. The structural modification in terms of high thermal shock resistance is achieved a) by nanoscale and semiconducting additives or b) by recycled carbon fibres or recycled carbon fibre structures. The addition of nanoscale and semiconducting additives is intended to increase the residual carbon content, while the carbon fibre structures are intended to act as crack deflection centres. The thermal shock resistance and the chemical interactions with the steel are being researched in a special steel casting simulator. AFA (Automatic Feature Analysis) in the P-SEM is used to determine the significant inclusion populations in the steel. By simultaneously pouring the molten steel through a reference pouring nozzle and a nozzle based on the environmentally friendly refractory products, wetting and, in particular, anti-clogging phenomena can be investigated in terms of material and flow technology. | |
Funding Acknowledgement | This study was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), project number 461482547, within the Research Training Group “GRK 2802: Refractory Recycling: A contribution for raw material-, energy- and climateefficiency in high temperature processes” | |
Public project website(s) | https://tu-freiberg.de/en/research/grk2802 | |
Project title | GRK2802_P1_Environmentally friendly binders for Al2O3-C and MgO-C products based on recycled materials with special thermomechanical, chemical and anti-clogging properties |
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