金属硅粉加入量对铁沟浇注料性能的影响

Effect of Silicon Metal Powder Addition on Properties of Iron Runner Castable

以电熔棕刚玉、SiC、α-氧化铝粉、硅微粉为原料,采用复合微粉、水泥和高温增强剂结合的Al_2O_3-Si C-C质铁沟料,试验了金属硅粉作为防氧化剂,对1 000℃×3 h、1 450℃×3 h烧后试样物理性能、抗折强度、抗氧化性及抗渣性能的影响。结果表明,随着金属硅粉加入量的增加,铁沟料线变化逐渐降低,体积密量升高,气孔率逐渐降低,抗折强度逐渐提高,抗氧化性提高,金属硅粉加入量在2%和3%时,抗渣侵蚀性能最好。综合考虑金属硅粉加入量以2%为宜。

Al2O3-SiC-C iron runner castable were prepared by using fused brow corundum, SiC, a -Al2O3 micro-powder and SiO2 mi- cro-powder as raw materials, and composite micro-powder, cement, high temperature enhancer as additives. Using silicon metallic powder as antioxidant, firing at 1 000 % and 1 450 ℃ for 3 h, the effects of silicon metallic powder additions on the rupture strength, inoxidizability and slag resistance were investigated. The results showed that the linear change rate of Al2O3-SiC-C iron runner castable is decreased gradually, bulk density and porosity are decreased, the rupture strength and inoxidizability are increased with the increasing of the addition of silicon metallic powder. The slag resistance is the best in the specimen added by 2% and 3% silicon metallic powder. Comprehensively considering various properties, 2% silicon metallic powder addition is appropriate for the Al2O3-SiC-C iron runner castable.