摘要
通过对脱碳层面积的比较,研究了低碳MgO-C砖中Al和Si复合添加剂及Al和Al-Mg合金复合添加剂在600℃、1000℃和1400℃时的抗氧化效果。结果表明,Al/Si复合添加剂可明显改善低碳MgO-C砖的抗氧化性能,且试样的抗氧化效果随着Al粉加入量的增大明显增强,可见Al粉比Si粉的抗氧化作用更有效。但是单独添加Al粉时,低碳MgO-C材料抗氧化效果最好。Al粉或Al-Mg合金粉单独使用时对材料的抗氧化作用要优于混合使用时的作用效果,而且Al-Mg合金抑制材料中C氧化的效果不如Al粉的作用明显。综合考虑认为,单一金属添加剂的抗氧化效果优于复合添加剂。
The effects of Al/Si compound additives and Al/Al-Mg alloy compound additives on oxidation resistance of low-carbon MgO-C bricks under 600℃, 1000℃ and 1400℃ respectively are studied through comparing the area ratio of decarburized layer. The experimental results show that additives of Al and Si can improve oxidation resis- tance of low-carbon MgO-C bricks effectively. The oxidation resistance of low-canbon MgO-C bricks is significantly improved as the increase of Al addition, so there is better oxidation resistance of Al powder than Si powder＇s. However, single addition of Al powder shows the best oxidation resistance of low-carbon MgO-C bricks. Single addition of Al powder or Al-Mg alloy powder shows more effective oxidation resistance than mixed addition. And the oxidation resistance function of A1 powder is more significant than Al Mg alloy powder. Therefore, single additives shows more effective oxidation resistance than compound additives.
