镁白云石耐火材料在初期熔渣中的溶解速度,是以旋转试棒及其直径的减少进行测定的。碱度及液渣中的CaO和MgO的浓度差对溶解速度的影响是主要的。FeO和MnO的影响较小。粘度小,呈均一相的液渣对镁白云石的渗透快并加速耐火材料的溶解。但当反应界面有晶体析出,局部渣呈多相熔体,提高了界面的局部粘度从而减少渗透和缓溶解。当反应界面有固体保护膜形成,可以阻止渗透并极大地降低溶解速度。 The dissolution rate of magnesium-dolomite refractory in initial slag is measured by the rotation of the test rod and the decrease of its diameter. Alkalinity and slag in the CaO and MgO concentration difference on the dissolution rate is the main influence. FeO and MnO less affected. Viscosity is small, homogeneous liquid slag on the permeability of magnesium dolomite and accelerate the dissolution of refractory materials. However, when the reaction interface is crystallized, the local slag is multiphase melt, which increases the local viscosity of the interface and thus reduces the infiltration and slow dissolution. When the reaction interface is formed with a solid protective film, penetration can be prevented and the dissolution rate can be greatly reduced.