旋转浸渍法研究含β-Sialon镁质浇注料的抗渣性能

Study on Slag Resistance of Magnesia Castable with β-Sialon by Revolution Dipping Method

采用中频感应炉进行旋转浸渍法抗渣实验,研究了未加入和加入5%矾土基β-Sialon镁质浇注料在1600℃不同浸渍时间(分别为10,15,20,25min)条件下的抗渣性能。结果表明:加入β-Sialon的镁质浇注料侵蚀速率减慢,旋转浸渍25min时,其抗渣性优于未加入Sialon的镁质浇注料;从显微结构来看Sialon呈短柱状或针状晶体穿插或者弥散在方镁石、镁铝尖晶石或镁橄榄石之间,填充了基质中的部分空隙,Sialon晶体与氧化物熔渣之间难润湿,因而提高了材料的抗渣性能。

The slag resistance of magnesia castable without Sialon and with 5% bauxite-based β-Sialon was studied by revolution dipping method at 1 600℃ for 1 0, 15, 20 and 25 minutes. The results show that the penetration ratio decreases after adding β-Sialon, and the slag resistance of specimens with Sialon is better than the specimens without Sialon after revolution dipping for 25 minutes; SEM analysis shows that Sialon which is puncheon-like and needle-like interweave or disperse into the interplace of periclase, spinel or forsterrite and fill part interstice in matrixs. The slag resistance of the castable improved because of the poor wettability between Sialon and molten slag.