材料期刊网

为了探索钒铁冶炼炉氧化铝渣用于耐火材料的可能性，选取完整的氧化铝渣渣饼，剖开后根据其断面不同区域的颜色和致密度分层取样，检测其理化性能、物相组成、颗粒（5～3 mm）强度及水硬特性。试验结果表明：氧化铝渣饼大致可分为三层：以MgO为主要成分（质量分数为83．89％）的镁砂层，以镁铝尖晶石、方镁石和二铝酸一钙为主晶相的变质层，以二铝酸一钙和镁铝尖晶石为主晶相（二者的体积分数之和在80％以上）的主渣层；各渣层的耐火度大于1790℃，体积密度大于3．0 g·cm-3，吸水率≤2．4％；主渣层的颗粒强度与焦宝石的接近，具有水硬性。综合来看，氧化铝渣可用于耐火材料。

To explore the possibility of using alumina slag from smelting furnace of vanadium iron to produce refractories,a full piece of alumina slag cake was selected,and stratified sampled according to the color and density of cross sections in different regions.The chemical compositions and physical properties, phase compositions,particles (5 -3 mm)strength and hydraulic properties were tested.The results show that:(1)the alumina slag cake can be broadly divided into three layers:a magnesite layer with MgO as the main composition (MgO 83.89 mass%),a degenerative layer with magnesium aluminate spinel,periclase and calcium dialuminate as main phases,and a main slag layer with calcium dialuminate and magnesium aluminate spinel as main phases (volume fraction of the two phases ≥80%);(2)the refractoriness of all slag layers is higher than 1 790 ℃,the BD is higher than 3.0 g·cm -3 and the water absorption is lower than 3.0%,the particle strength in the main slag layer is close to that of flint clay possessing hydraulic properties;(3)to sum up,the alumina slag from smelting furnace of vanadium iron can be used in refracto-ries production.