| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Pyrometallurgy: Furnace Containment
|
| Presentation Title |
Corrosion of Alkali Metals on SiC-Si3N4 Refractory of Pusher Kiln |
| Author(s) |
Ruixin Hu, Jiang Diao, Jinan Wang, Deman Liu, Wenfeng Tan, Hongyi Li, Bing Xie |
| On-Site Speaker (Planned) |
Ruixin Hu |
| Abstract Scope |
When using pusher kiln to produce vanadium nitrogen alloy, alkali metals in raw materials will volatilize and deposit in the kiln, which will corrode refractories. In this paper, SiC-Si3N4 composite brick was used as the research object, and sodium carbonate and potassium carbonate were used as corrosion reagents to carry out corrosion experiments in a vacuum tube furnace. The results indicate that after 3 hours of corrosion of composite bricks with sodium carbonate or potassium carbonate, micropores appear on the surface and peel off. The thickness of spalling layer and corrosion layer caused by sodium carbonate is 3.0 mm and 2.67 mm, respectively. The thickness of spalling layer and corrosion layer caused by potassium carbonate is 0.5 mm and 0.77 mm, respectively. Combined with theoretical calculation and experimental characterization, it is found that the corrosion process is divided into three stages: corrosion reaction, slagging and reduction of alkali metal oxides. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, Other |