Preparation and slag erosion resistance mechanism of MgAlON based composite refractories synthesized from solid waste
| Autor: | Bo Wang, Chen Weibin, Lili Liu, Hao Wang, Xidong Wang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Municipal solid waste Materials science Process Chemistry and Technology Composite number Metallurgy Sintering Slag Environmental pollution 02 engineering and technology Activation energy 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Compressive strength Flexural strength visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Ceramics International. 46:26035-26043 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2020.07.096 |
| Popis: | Refractory waste is a typical industrial solid waste. Owing to technical reasons, most of the refractory waste is not efficiently utilized and causes environmental pollution. In this study, we explored a novel technology for the preparation of MgAlON based composite refractories using waste MgO-C and Al2O3-MgO-C refractory materials. The experimental results showed that higher sintering temperatures, enhanced the mechanics of the synthesized MgAlON based composite refractories. Its flexural strength and compressive strength reached 7.7 MPa and 15.87 MPa, respectively, as the sintering temperature increased to 1823 K. Additionally, the slag erosion resistance of the MgAlON based composite refractories was studied and was found to be significantly influenced by the temperature and duration of erosion. The erosion of MgAlON based composite refractories by metallurgical slag was controlled by a combination of chemical reaction and diffusion. The apparent activation energy of slag erosion was approximately 274.6 kJ/mol. During the erosion of MgAlON based composite refractories, the metallurgical slag mainly penetrated the material through its pores. The Si, Ca, and Ti elements in the slag diffused into MgAlON based composite refractories, whereas Mg and Al, diffused into the slag from the MgAlON based composite refractories. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect