Excellent Performance of High Temperature Anti-oxidation Coatings for Graphite Electrode, Graphite and Graphite Anode Plate

2019-01-15 點(diǎn)擊量：4097

 

Graphite electrodes, graphite and graphite anode plates are three kinds of equipment or materials that must be used in industry. The quality of their use is directly related to the safety and efficiency of industrial production. If the material is oxidized and corroded, the normal operation of industrial production will not be possible, and the safety risk index will be greatly increased. Solving the problem of oxidation corrosion of high-temperature materials also reflects the level of science and technology of a country. The high-temperature sealing anti-oxidation coating technology of Beijing Zhisheng Weihua Company has high content and strong scientific research technology.
The normal working temperature of graphite electrode can reach 1400 C. Under such high temperature, the lining of graphite electrode can be oxidized and aged at high temperature, such as insulating bricks, insulating cotton and other insulating materials. The material becomes crisp, the effect of insulating and insulating decreases, and the safety index of graphite electrode decreases sharply. In this way, a batch of graphite electrode linings will be replaced for 3-5 years, which will result in waste of materials and reduce the normal working time of graphite electrode. For enterprises, it is a loss for their wives and a loss for their troops.
Graphite anode plate corrodes rapidly under high temperature. High temperature oxidation of graphite anode plate means that graphite anode plate reacts with oxygen or oxygen-containing substances such as steam, carbon dioxide and SO2 in high temperature gas phase environment and turns into graphite anode plate oxide. Graphite anode plate oxide has been separated from graphite anode plate and can not form a whole. High temperature corrosion is a common problem in petrochemical, energy, power, metallurgy, aerospace and other fields. High temperature corrosion and oxidation of graphite anode plate will result in brittle layer of graphite anode plate. Hardness, strength, toughness and other indicators of graphite anode plate decrease greatly, and it is easy to cause major safety accidents such as explosion.
Graphite at high temperature includes graphite electrode, graphite mould and graphite crucible. Graphite in these three materials is prone to oxidative combustion reaction at high temperature, which results in the increase of porosity and loosening structure of the rubber-carbon layer on the surface of the material and affects its service life. Taking the conventional baking of ladle as an example, the decarbonized loose layer on the surface of carbon (graphite) refractory produced by baking is more than 15 mm, and decarbonized layer erodes quickly after Shenggang. The loss of graphite electrodes in steel works accounts for more than one-tenth of the production cost of steel works. In Zhisheng Weihua High Temperature Oxidation Laboratory, it was found that a 3-kg graphite crucible lasted for three hours at 1600 C, and its weight was reduced by more than 30%. That is to say, the 3-kg graphite crucible turned into 2-kg at once, and oxidation was really fast. Graphite is a relatively valuable material. Corrosion and oxidation result in increased production costs and waste of energy materials.
_Combined with the above, high temperature oxidation of graphite and graphite anode plates can cause harm, and prevent oxidation under great safety significance and energy saving benefits. In order to solve the problem of high temperature oxidation of graphite electrodes, graphite and graphite anode plates, we need to find a kind of material, which has high temperature resistance, good compactness, strong antioxidant capacity and first-class adhesion. Bear in mind that under many understandings, we have obtained a kind of material which can completely meet the above-mentioned targets - - ZS-1021 high-temperature sealing coating. This kind of coating has high temperature resistance. With Zhisheng Weihua special high-temperature solution, the temperature resistance can reach 1800 C, and can be fireproof for a long time. The material adopts nano-scale structure, has good compactness, the hardness can reach 7-8H, and the hardness is higher than that of graphite anode plate. Coatings can form compact coatings on graphite electrodes, graphite and graphite anode plates, which have strong anti-rust, anti-corrosion, anti-oxidation, anti-discoloration, wear resistance and other characteristics. ZS-1021 high-temperature sealing coating is applied on graphite electrodes, graphite and graphite anode plates. It can prevent oxidation rate from reaching 80% at high temperature, save energy and use efficiency of materials can reach 90%, and safety accident rate of industrial high-temperature production materials can be reduced by more than 95%, objective data.