隧道窑高温炉加热棒在大气压下碳化硅管陶瓷烧结U硅碳棒
在新窑建成或旧窑进行大修后，烤窑工作是必须的，这样才能开始放料生产。在条件允许的情况下，我们建议使用其他类型的热源来进行烤窑操作。如果确实需要使用硅碳棒的话，那么建议使用的是旧的硅碳棒。如前所述，在高温环境下，水蒸汽对硅碳棒是不利的，而且新建的料道中含有大量水分，而且硅碳棒可能会长期处于高功率状态，并且表面温度较高。不管是用旧的还是新的硅碳棒进行烤窑，都应该将控制系统设置为“手动”模式，在开始送电时，逐渐调节加到硅碳棒上的电压，不要超过额定电压的一半，并预热一段时间。当电压和电流稳定后，再逐渐提高电压。此外，如果需要加速升温，可以通过火焰枪辅助，但在此过程中，一定要避免让火焰直接烧击硅碴棒，以免导致其氧化。
carbonized silicon can be divided into two types: black carbonized silicon and green carbonized silicon, with the latter having a higher purity rate and being commonly used in the abrasive industry and electrical industry. The production of electric heating elements using silicon carbide rods takes advantage of the properties of carbonized silicon, which is conductive, thermally conductive, and has stable properties with a long service life. Silicon carbide rods do not react with any acids. However, at around 1300°C, they can undergo chemical reactions with alkaline substances and alkaline oxides.
Silicon carbide rods have some anti-oxidation properties. When the rod body temperature reaches 800°C, surface oxidation begins to occur. As the temperature continues to rise, a layer of SiO2 forms on the surface of the rod body to prevent further oxidation from occurring. This extends the lifespan of silicon carbide rods.
The SiO2 protective layer has a certain melting point that will break down or peel off when exposed to temperatures above 1600°C. If continued use causes further oxidation while generating new layers for protection purposes, then it is crucial to design electric furnaces correctly along with parameters for silica carbide rods as well as proper usage methods for longer durability in these components' lifetime
