Scale graphite has strong heat resistance and good corrosion resistance. It is the main carbon raw material used by carbon -resistant refractory materials, but it will have an oxidation reaction with oxygen at high temperature at high temperature. The following editor introduces the factors that affect the oxidation of scales. The specifics are as follows:

1. Carbon oxidation response

Heating graphite in the air, carbon can be directly oxidized by O2 to CO and CO2. When carbon oxidation, CO and CO2 hybrid gases are generated. At low temperatures, it is mainly to balance CO2 and solid graphite. Solid graphite balance. At more than 1000 ° C, almost all of the mixed gas is CO. The oxidation response speed of graphite decreases with the total pressure of the system, but it increases with the rise of temperature.

2. The effect of granularity on oxidation temperature

With the increase of granularity, the temperature of the graphite's significant oxidation starts and the temperature of the oxidation peak increased, but at a particle size of about 0.125mm, the oxidation temperature has a turning point. The impact of the oxidation temperature is significant; it is greater than the boundary value of this. Although the particle size increases, the oxidation temperature is not significant. The research on different origin and fixed carbon content scale graphite also found the same law. This point is guiding for carbon -combined refractory materials to choose scales graphite. Therefore, considering antioxidant and price considerations, it is appropriate to choose scales of about 0.125mm (120 mesh).