摘要
分别采用静态坩埚抗渣法和回转抗渣法,对w(Cr2O3)=10%的A和B两种Al2O3-Cr2O3砖进行了抗渣性能对比。结果发现:两种砖的化学组成、显气孔率、体积密度和抗热震性相近,B砖强度优于A砖的。但由于与B砖相比,A砖内部气孔尺寸更小,所用电熔白刚玉骨料形貌平滑,较为致密,粒度呈连续式分布,且A砖中Al2O3-Cr2O3固溶体发育较小,相互交错,形成了孔隙较小的空间网状结构,这种显微结构显著降低了熔渣对耐火材料的渗透和破坏,使A砖的抗渣性优于B砖的。因此,制备微气孔化结构的制品是提高Al2O3-Cr2O3材料抗渣性能的有效途径。
The slag resistance of two Al2O3-Cr2O3 bricks （with 10 mass% Cr2O3 ） A and B were researched using static crucible method and rotary slag method, respectively. The results show that,two Al2O3-Cr2O3 bricks have similar properties such as apparent porosity, bulk density ,thermal shock resistance, and chemical compositions. Brick B has higher strength than brick A. Compared with brick B：brick A has smaller inner pores, because the white corundum aggregates in brick A are smoother and denser with continuous particle size distribution ;Al2O3-Cr2O3 solid solution in brick A is smaller,crossing and forming net structure with small gaps,which reduces the penetration and wear of slag to refractories,meaning that brick A has better slag resistance than brick B. It＇ s Obvious that optimizing microstructure is an effective way to improve the slag resistance of Al2O3-Cr2O3 materials.
出处
《耐火材料》
CAS
北大核心
2014年第3期188-193,共6页
Refractories
基金
973计划前期研究专项(2012CB724607)
