刚玉-尖晶石无碳钢包砖的研发与应用

Development and application of corundum-spinel carbon-free ladle brick

为了满足生产低碳钢和超低碳钢的技术要求,以棕刚玉、板状刚玉、电熔镁铝尖晶石粉为原料,电熔镁砂粉和α-氧化铝微粉为添加剂,络合镁铝溶胶为结合剂,研制出了机压成型免烧刚玉-尖晶石无碳砖,并进行了实验。试验结果表明:当电熔镁砂粉和α-氧化铝微粉加入量分别为3%和8%时,试验砖的性能最佳。该砖在太钢90 t LF钢包熔池及包底部位使用,其寿命达到105炉。

In order to meet the technical requirements for the production of low carbon steel and ultra-low carbon steel,brown corundum,plate-like corundum,fused magnesium aluminate spinel powder as raw materials,fused magnesia powder and alumina micro powder as additives,and almagnesia powder as binder,the machine pressed unburned corundum spinel carbon free brick was developed.The results show that the performance of the brick is the best when the content of fused magnesia powder andα-alumina powder is 3%and 8%respectively,and the service life of the brick in the molten pool and bottom of 90 ton LF Ladle is up to 105 furnaces.