摘要
以电熔棕刚玉(8～5 mm、5～3 mm、3～1 mm)、电熔致密刚玉(1～0 mm、≤0.088 mm)、90 缺陷尖晶石(200 目、2µm)、78 尖晶石(1～0 mm、200 目、500 目)、98 碳化硅(1～0 mm、≤0.088 mm)、球状沥青、纯铝酸钙水泥、活性氧化铝微粉为主要原料,制备了出铁沟用Al2O3-SiC-C质浇注料,研究了两种尖晶石粒度及加入量对出铁沟用Al2O3-SiC-C质浇注料性能的影响.结果表明:1)随着尖晶石粒度的减小,浇注料黏性降低,排气性增强,流动性、体积密度呈增加趋势;2)经不同温度处理后,试样耐压强度、抗折强度、抗渣侵蚀性能呈先增加后降低的趋势;3)随着尖晶石中氧化镁含量的增加,试样的耐压强度、抗侵蚀性逐渐增加.
Abstract
Al2O3-SiC-C based castables for main hot metal runners are produced from fused brown corundum(8～5 mm,5～3 mm,3～1 mm),fused dense corundum(1～0 mm,≤0.088 mm),90 defective spinel(200 mesh,2 µm),78 spinel(1～0 mm,200 mesh,500 mesh),98 silicon carbide(1～0 mm,≤0.088 mm),spherical asphalt,calcium aluminate cement,and activated micro alumina as the main raw materials.The impact of the two types of spinels on the performance of Al2O3-SiC-C castable is studied in terms of particle size and addition amount.The experimental result shows that:1)as the particle size of spinel decreases,the viscosity of the castable decreases,the exhaust performance increases,and the flowability and bulk density show an increasing trend;2)After being treated at different temperatures,the compressive strength,flexural strength,and erosion resistance of samples show a trend from initial increasing to decreasing;3)With the increase of magnesium oxide content in spinel,the compressive strength and corrosion resistance of samples increase.
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