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1.问题的提出与分析在工矿企业中,不少单位都有井式回火炉。但使用时发现,在保温过程中均存在温度波动过大(约—30～+50℃的问题。为解决这一问题,我们对本厂一台 RJJ-24型井式回火炉进行了一系列检测、对比、分析,发现造成炉温波动大的主要原因是测温系统的“滞后”。造成测温系统滞后的主要因素有以下几点:(1)炉底无电热丝,保温层薄,易造成热量损失。热电偶插在坩埚与炉底之间,且热电偶保护管顶端又
1. Problems raised and analyzed In the industrial and mining enterprises, many units have a pit furnace. However, it is found that during the heat preservation process, the temperature fluctuates too much (about -30 to +50 DEG C. To solve this problem, we have carried out a series of tests on a RJJ-24 pit furnace in our factory. The main reason of the large temperature fluctuation is the “lag” of the temperature measurement system.The main factors that cause the temperature measurement system to lag are the following: (1) no electric heating wire at the bottom of the furnace, thin insulation layer , Easily lead to heat loss. Thermocouple inserted between the crucible and the bottom of the furnace, and thermocouple protection tube top and