【摘 要】
：
以电熔白刚玉、金属硅粉和石墨为主要原料,在氮气气氛下1550℃保温4h制备原位反应的Sialon结合氧化铝-碳材料,采用静态坩埚法研究精炼钢渣对该Sialon结合氧化铝-碳材料的侵蚀反应机理.试样在1500℃、1550℃和1600℃下分别保温1h、2h、3h时,进行渣侵蚀实验,采用SEM和EDS对渣侵蚀后试样的显微结构和微区成分分别进行分析,获得了Sialon结合氧化铝-碳材料的渣侵蚀机理.结果表
【机 构】
：
武汉科技大学耐火材料与冶金国家重点实验室,武汉,430081
论文部分内容阅读
以电熔白刚玉、金属硅粉和石墨为主要原料,在氮气气氛下1550℃保温4h制备原位反应的Sialon结合氧化铝-碳材料,采用静态坩埚法研究精炼钢渣对该Sialon结合氧化铝-碳材料的侵蚀反应机理.试样在1500℃、1550℃和1600℃下分别保温1h、2h、3h时,进行渣侵蚀实验,采用SEM和EDS对渣侵蚀后试样的显微结构和微区成分分别进行分析,获得了Sialon结合氧化铝-碳材料的渣侵蚀机理.结果表明:渣中CaO、SiO2和FeO与试样中的Al2O3和Sialon反应生成CaO-SiO2-FeO-Al2O3四元低熔相;随着Sialon和Al2O3的溶解,四元物相的熔点升高,抑制了熔渣的进一步侵蚀;渣中CaO和FeO含量降低,使熔渣的粘度增大,渣的渗透能力降低.Sialon结合氧化铝-碳材料的熔渣侵蚀过程受化学反应和扩散反应混合控制,建立了其渣侵动力学方程,获得熔渣侵蚀反应的表观活化能为214KJ/mol.
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