摘要
本文研究了Al2O3细粉的加入对MgO系浇注料性能的影响。在110℃×24h烘干，1500℃×3h烧成制度下，通过改变基质中Al2O3细粉的加入量，对材料物理性能和力学性能进行测试。结果表明：3％～5％Al2O3细粉的加入能显著改善MgO系浇注料的综合烧结性能：显气孔率15％～17％；体积密度3．01～3．03g／cm^3；耐压强度和抗折强度分别高达85～92MPa和12．4—14．5MPa；当Al2O3细粉的加入量大于5％时，由于材料线变化率和显气孔率的过度增大，引起材料结构的松散，导致材料强度的降低和抗渣性能的下降如：显气孔率大于20％；体积密度小于2．90g／cm^3；耐压强度和抗折强度则分别小于70MPa和10MPa。
Effect of Al2O3 powder addition on properties of MgO castable is investigated. We investigated and tested properties of the castable with the different Al2O3 powder addition by drying at 110℃ for 24 hours and sintering at 1500℃ for 3 hours, The results indicated that addition of 3% - 5% Al2O3 powder can remarkably improve properties of MgO castable. Such as ： the ratio of apparent porosity is 15% - 17% ,bulk density 3.01 -3.03g/cm^3 ,cold crushing strength 85 92MPa and cold bending strength 12.4 -14.5MPa. More 5% Al2O3 powder not only increase the permanent linear and the ratio of apparent porosity but also decrease its cold crushing strength and slag resistance to some degree ,Such as ：the ratio of apparent porosity is more 20% , bulk density less 2.90g/cm^3 , cold crushing strength less 70MPa and cold bending strength less 10MPa.
出处
《河南冶金》
2008年第1期9-11,共3页
Henan Metallurgy
