塑性相结合刚玉复合砖的高温性能

通过设定高炉使用条件 ,将塑性相结合刚玉复合砖与现在高炉使用的刚玉莫来石砖及棕刚玉碳化硅砖在同等实验条件下进行了高温性能的比较。结果表明 :塑性相结合刚玉复合砖的结构致密 ,高温抗折强度高 ;而且在高温还原气氛下 ,其基质中的Si可与C和N2 反应 ,生成具有良好抗炉渣、铁水和碱金属侵蚀能力的碳化物和氮化物 ,并填充表面的间隙 ,形成一个良好的防护层 ,因此其抗侵蚀性能优于棕刚玉碳化硅砖和刚玉莫来石砖。

High temperature properties of plastic phase bonded corundum composite brick

High temperature properties of plastic phase bonded corundum brick were studied and also compared with those of corundum-mullite brick and brown corundum-SiC brick under the blast furnace process.Results show that plastic phase bonded corundum brick has denser structure and higher hot modulus of rupture than the other two bricks.The plastic phase bonded corundum brick also has optimum resistances to slag,melted iron and alkali metals because the Si in the matrix reacts with C and N 2 forming SiC and Si 3N 4 and filling the gap of the brick's surface.