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为了解结晶器与坯壳间渣膜的结晶状态,用热丝法熔化性能测定仪对保护渣结晶性能进行研究。结果表明:连续冷却过程中,结晶是在一定温度范围内进行的;冷却速率越大,结晶温度越低;冷却速率超过一定值时,保护渣不结晶。不同温度下的等温实验结果表明:在一定过冷度范围内,保护渣开始结晶;过冷度的大小与结晶开始和结束时间有关;水蒸气可促进保护渣结晶,在不同温度等温时,保护渣结晶开始温度提高,结晶开始时间缩短。
In order to understand the crystallization state of the slag film between the mold and the blank shell, the crystallization performance of the mold powder was studied by using the hot wire method melting performance tester. The results show that during continuous cooling, the crystallization proceeds within a certain temperature range. The larger the cooling rate, the lower the crystallization temperature. When the cooling rate exceeds a certain value, the mold powder does not crystallize. The results of isothermal experiments at different temperatures show that the mold powder begins to crystallize in a certain degree of undercooling. The degree of supercooling is related to the start and end time of crystallization. Water vapor can promote the crystallization of the mold flux. When isothermal at different temperatures, Slag crystallization start temperature increases, the crystallization start time is shortened.