中文摘要：

以镁质坩埚为试验容器，配制碱度分别为1．2、1．5、1．7、1．9、2．2、2．4的改性钢渣并放置于坩埚中，以10℃·min。的速率升温至1570℃并保温30min加热熔化。研究了热态改性钢渣对镁质坩埚的侵蚀，并采用光学显微镜、SEM、EDS和XRD进一步分析了侵蚀行为。分析表明：改性钢渣对镁质耐火材料的侵蚀反应主要在熔渣一坩埚界面处进行，熔渣碱度≤1．5时耐火材料侵蚀加重；由于钢渣中铁离子渗透进方镁石晶体内，形成弥散分布的颗粒状富FeO固溶体和含FeO方镁石基质相，这两种物相受内部FeO、MgO质量比和钢渣中A120，含量的影响，选择性地同渣中不同化学组分进行反应而脱落溶解至钢渣中。

英文摘要：

Six kinds of modified BOF slag with varied basicities （ 1.2,1.5,1.7,1.9,2.2,2.4, respectively） were prepared,put in six separate magnesia crucibles, heated to 1 570 ℃at 10 ℃·min-1 holding for 30 min. The corrosion of the hot modified slags to the magnesia crucible was analyzed with optical micro- scope,SEM,EDS and XRD. Analysis shows that the corrosion reaction of magnesia crucible by the modi- fied slags mainly occurs in the slag-crucible interface,and when the basicity of liquid slag is ≤1.5 the cor- rosion of crucible gets severe;Fe ions in liquid slag penetrate into the periclase crystals forming the dis- persed granular FeO-rich solid solution and FeO-containing periclase matrix phase,and they selectively re- act with different components of liquid slag and dissolve in the slag affected by their mass ratio of FeO to MgO and the AI203 content in liquid slag.