含钛熔渣与镁碳质耐火材料的作用机理

Interaction Mechanism between MgO-C Based Refractory and Slag Containing Titania

镁碳质耐火材料是一种被广泛应用于工业生产中的碳复合耐火材料 ,在实际应用过程中它具有良好的性能 ,特别是抗渣性能。采用浸渍法研究含钛熔渣 (TiO2 2 %～ 30 % )与镁碳质耐火材料间的相互作用规律。通过SEM、X -RAY衍射和能谱等技术手段 ,分析了侵蚀前后耐火材料的微观组织结构和物相组成的变化 ,提出了含钛熔渣中镁碳质耐火材料的侵蚀机理。熔渣中氧化物的脱碳和熔渣对耐火材料的渗透是耐火材料蚀损的最主要原因 。

MgO-C based refractory is a kind of graphite-bonded refractory which is widely used in industry. It presents excellent capability in application, especially good slag resistance. The interaction between the slag containing titania (TiO 2 2%～30%) and MgO-C based refractory have been investigated by the quasi-static immersion test and rotating immersion test. The microstructures and compositions of the corrosive refractories are investigated by SEM, X-Ray diffraction and Spectrum technology. The corrosion mechanism of MgO-C based refractory in the slag containing titanium oxides is developed. The main reasons which cause the corrosion of MgO-C based refractory include decarbonization of oxides and permeation of slag. All these lead to a deteriorated layer.