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采用真空感应炉浸棒法,研究了高钙与低钙材料在真空动态条件下抗侵蚀性的差异。该法的实验条件是真空度5 kPa、1 650℃保温25 min;观察与测量了实验后的试样,并用SEM与EDAX分析了侵蚀后试样的结构与组成。结果表明,在CaO-SiO_2熔渣条件下,低碱度熔渣对镁钙试样有较强的侵蚀性,随熔渣碱度的升高其侵蚀作用明显缓解,当碱度R>1.5时试样的抗侵蚀性恶化,低钙镁钙材料的抗侵蚀性优于高钙材料。在CaO-Al_2O_3熔渣条件下,2种材料的抗侵蚀性都很差。
Vacuum impregnation method was used to study the difference of corrosion resistance between high calcium and low calcium under vacuum dynamic conditions. The experimental conditions of the method are the vacuum degree of 5 kPa and the temperature of 1 650 ℃ for 25 min. The samples after the experiment were observed and analyzed. The structure and composition of the samples after erosion were analyzed by SEM and EDAX. The results show that under the condition of CaO-SiO 2 slag, the low alkalinity slag has strong corrosion on the Mg-Ca samples, and the erosion is obviously alleviated with the increase of the basicity of the slag. When the basicity R> 1.5 The corrosion resistance of the sample is deteriorated, and the corrosion resistance of the low-calcium-magnesium-calcium material is superior to that of the high-calcium material. Under CaO-Al 2 O 3 slag conditions, the corrosion resistance of both materials is poor.