Method for preventing flake graphite from being oxidized at high temperature

In order to prevent the corrosion damage caused by the oxidation of flake graphite at high temperature, it is necessary to find a material to put a coat on the high temperature material, which can effectively protect the flake graphite from oxidation at high temperature. To find this kind of flake graphite anti-oxidation coat, we must first resist high temperature and compactness.
Good, good corrosion resistance, strong oxidation resistance, high hardness and other characteristics. The following Furuite Graphite Xiaobian introduces the methods to prevent flake graphite from being oxidized at high temperature:

1. Use materials with vapor pressure less than 0.1333MPa(1650*C) and good comprehensive performance.
2. Choose the glass phase material that meets the performance requirements as the self-sealing material, and make it become the crack sealing material at the working temperature.
3. According to the function of the standard free energy of the reaction with oxygen with temperature, at the steelmaking temperature (1650-1750*C), the materials with greater affinity to oxygen than carbon-oxygen are selected to preferentially capture oxygen, so as to oxidize themselves and protect the flake graphite. After oxidation, a new phase with volume ratio of original phase is generated.
Large, which is helpful to block the inward diffusion channel of oxygen and form an oxidation barrier.
4. At the working temperature, a large number of inclusions such as Al2O3, SiO2 and Fe2O3 in molten steel can be adsorbed, which react with themselves to sinter, so that various inclusions from molten steel gradually enter the coating.
The oxidation temperature of flake graphite produced in China is 560815°C when the carbon content is 88%96% and the particle size is more than 400 meshes. Among them, when the particle size of graphite is 0.0970.105mm, the oxidation temperature of graphite with more than 90% carbon content is 600815°C and the carbon content is less than 90%.
The oxidation temperature of ink is 620790 C. The better the crystalline flake graphite is, the higher the oxidation peak temperature is, and the less the oxidation weight loss is at high temperature.