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研究了含水量、搅拌速度和盐浴温度对55%KNO3+45%NaNO2硝盐介质冷却特性的影响。采用标准镍合金探头,测定了硝盐介质的冷却曲线。结果表明,随着含水量增大,介质在高温和低温阶段冷却速度均增大;搅拌速度主要对低温阶段的冷却速度有影响,提高搅拌速度,低温冷速随之增大;提高盐浴温度,对硝盐介质冷却能力影响不大,但使探头温度从850℃冷却至200℃的时间明显延长;含水量对硝盐介质冷却能力影响最为显著,其次是搅拌速度,最后是盐浴温度。
The effects of water content, stirring speed and salt bath temperature on cooling characteristics of 55% KNO3 + 45% NaNO2 nitrate media were studied. The standard nickel alloy probe was used to determine the cooling curve of the nitrate salt medium. The results show that with the increase of water content, the cooling rate of the medium increases at high temperature and low temperature. The stirring speed mainly affects the cooling rate in the low temperature stage. When the stirring speed is increased, the cooling rate at low temperature increases. , Which has little effect on the cooling ability of the nitrate salt medium, but the time of cooling the probe temperature from 850 ℃ to 200 ℃ is obviously prolonged. The water content has the most significant influence on the cooling capacity of the nitrate salt medium, followed by the stirring speed and finally the salt bath temperature.