Dissolution of different types of MgO based refractories into molten CaO-Al₂O₃-MgO-SiO₂ slag was studied. Formation of micro spinel particles by addition of either colloidal alumina or micro alumina powder in the MgO matrix efficiently reduced the dissolution. The dissolution of MgO was found to be controlled by the slag penetration into the MgO matrix. In the case of stagnant slag, the slag-penetration would lead to the final dissociation of the decarbonized commercial MgO-carbon cube in less than 6 min. The major dissolution took place between the MgO grains and the liquid in this penetrated layer. The increase of the thickness slowed down the dissolution. In the case of stagnant slag and slag stirred at low speed, the internal mass transfer in the slag-penetrated layer is the controlling step. At higher stirring speeds, the slag-penetrated layer was removed. The removal of the penetrated layer would enhance the dissolution process.

不同类型的MgO基耐火材料溶解在熔融的CaO-Al ₂ O ₃ -MgO-SiO _2中研究了炉渣。通过在MgO基质中添加胶体氧化铝或微氧化铝粉末形成微尖晶石颗粒，可有效降低溶解度。发现MgO的溶解受炉渣渗透到MgO基质中的控制。在炉渣停滞的情况下，炉渣的渗透将导致脱碳的商用MgO-碳立方的最终分解在不到6分钟的时间内完成。主要的溶解发生在MgO晶粒和该渗透层中的液体之间。厚度的增加减慢了溶解。在停滞的炉渣和低速搅拌炉渣的情况下，在炉渣渗透层中的内部传质是控制步骤。在较高的搅拌速度下，除去了熔渣渗透层。