We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
锆英石加入量对低碳镁碳砖抗剥落性能的影响.
- Authors
郑俊国; 赵伟; 黄奥; 顾华志; 孙春晖; 颜浩; 刘靖轩; 赵现堂
- Abstract
In order to improve the spalling resistance of low-carbon MgO-C bricks for VOD ladles, the low- carbon MgO-C bricks were prepared using fused magnesia (53,3-1, <1 and <0.088 mm), natural flaky graphite (<0.15 mm), metallic aluminum powder (<0.045 mm), and zircon powder (<0.05 mm) as main raw materials, thermosetting phenolic resin as the binder. Effects of zircon additions (0,1%,2%, and 5%, by mass) on the spalling resistance of low-carbon MgO-C bricks were studied. The results show that: (1) the hot modulus of rupture, thermal shock resistance, oxidation resistance and slag resistance of the sample with 1% zircon all reach the maximum, indicating that the addition of zircon helps to improve the spalling resistance of low-carbon MgO-C bricks; (2) AION of needle-like and continuous flaky spatial structure and flaky Al2O3-ZrO2 composite form in the matrix after being heated at 1 400 °C for 0.5 h in carbon embedded condition, which enhances the high temperature mechanical property and thermal shock resistance due to the effect of pinning toughening and particle toughening; (3) excessive zircon results in a substantial increase in zirconia, whose volume change at high temperatures leads to the aggregation of micro- cracks in the matrix, resulting in a significant decline in the anti-spalling property of low-carbon MgO-C bricks.
- Publication
Refractories / Naihuo Cailiao, 2023, Vol 57, Issue 6, p508
- ISSN
1001-1935
- Publication type
Article
- DOI
10.3969/j.issn.1001-1935.2023.06.010