尖晶石性质对刚玉-尖晶石不烧砖抗渣性的影响

摘要

Slag resistances of three kinds of unfired corundum-spinel bricks containing different spinels were researched using static crucible method. The effects of grain size and lattice distortion of spinel on slag resistance were investigated by XRD,SEM and EDAX. The results show that: ( 1 )the grain size of spinel remarkably affects the corrosion resistance, and the corrosion resistance increases with grain size increasing; (2)the spinel with higher lattice distortion can absorb more Fe and Mn ions on the interface of slag and refractories; (3)the lattice distortion affects the penetration resistance,the spinel with high lattice distortion can absorb more cations,change the slag composition, make slag with rich silicon and high viscosity,and inhibit the further penetration of slag.%采用静态坩埚法研究了添加3种不同性质尖晶石的刚玉-尖晶石不烧砖的抗渣性能,并通过XRD、SEM和EDAX分析了尖晶石的晶粒尺寸、晶格畸变对试样抗渣性的影响.结果表明:(1.尖晶石的晶粒尺寸影响试样的抗侵蚀能力,晶粒尺寸越大,试样抗侵蚀能力越强;(2.晶格畸变较大时,尖晶石在渣/耐火材料界面处吸收熔渣中Fe、Mn离子能力更强;(3)尖晶石的晶格畸变影响试样的抗渗透性能,当晶格畸变较大时,可吸收渣中更多的阳离子,改变渗透渣的成分,使渣富硅化,黏度增大,阻碍了熔渣进一步渗透.