新一代电炉炉底用捣打料技术特性及耐蚀机理探讨

Characterization and Anticorrosion Features of the MgO-CaO-Fe_2O_3 Stamped Packing Used in the Electrical Arc Furnaces for Steelmaking

采用显微分析及相图分析方法对新一代MgO CaO Fe2 O3 合成砂炉底捣打料的技术特性及冶金性能进行了研究剖析 ,结果表明 :该捣打料的主要晶相为方镁石 ,基质胶结相为低熔过渡型的C2 F(C4 AF) ·在实际应用中C2 F具有活化晶格加速烧结的作用 ,且C2 F成氧化铁及CaO分解分别溶入方镁石形成RO相及反应生成高熔点C2 S相 ,有较强的抗蚀性·并对捣打料与熔渣反应 ,在钢液中的行为 ,在炉底烧结及蚀损的机理进行了探讨·

The properties and metallurgical performances for new type of MgO CaO Fe 2O 3 synthetic sand for furnace bottom were analyzed by means of micro analysis and phase equilibrium analysis. The results show that the major crystal phase of the stamping stuff is periclase and matrix cementation phase is the C 2F(C 4AF)with low smelting point transients. In the actual application,the C 2F plays the role of activating crystal lattice and accelerating the sintering. And that,the C 2F became into iron oxide and CaO dissolved were merged into periclase respectively. Finally the RO phase was formed and the high smelting point C 2S phase with stronger anticorrosionability was produced through the reaction. The mechanism of the bottom sintering and corrosion damage is exposed due to the reaction of the stamping stuff and molten slag and the performance at high temperature.