hp400 graphite electrode

Pubdate: 08-05 2021

Safety hazards of hp400 graphite electrode, graphite, graphite anode plate under high temperature oxidation

hp400 graphite electrode

In industry, hp400 graphite electrode and graphite anode plate require three kinds of equipment or materials. 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 realized, and the safety hazard index will be greatly improved. When the hp400 graphite electrode works normally, its temperature can reach 1400°C. At high temperature, the inner lining of hp400 graphite electrode is oxidized and aged at high temperature, such as high-temperature flame barbecue, lining thermal insulation brick, thermal insulation cotton, etc., the material becomes brittle, the thermal insulation effect is reduced, and the safety index of hp400 graphite electrode is reduced. In this way, a batch of hp400 graphite electrode linings will be replaced for 3-5 years, which will lead to material waste and shorten the normal working time of hp400 graphite electrode.

Graphite anode plates oxidize and corrode faster at high temperatures. The high-temperature oxidation of the graphite anode plate refers to the reaction of the graphite anode plate with steam, carbon dioxide, sulfur dioxide and other oxygen-containing substances in a high-temperature gas environment to form the oxide of the graphite anode plate. The oxide of the graphite anode plate cannot be separated into a whole with the graphite anode plate. High temperature corrosion is a common problem in petrochemical, energy, electric power, metallurgy, aerospace and other fields. The corrosion and oxidation of the graphite anode plate at high temperature will cause the embrittlement layer, hardness, strength and toughness of the graphite anode plate to decrease, and it is extremely prone to major safety accidents such as explosion.

High temperature graphite includes hp400 graphite electrode, graphite mold and graphite crucible. The graphite in these three materials is prone to oxidation and combustion reaction at high temperature, which leads to the increase of the porosity and porous structure of the rubber-carbon layer on the surface of the material, which affects its service life. Taking the traditional ladle baking as an example, a decarburized porous layer with a diameter greater than 15mm is produced on the general surface of the carbon (graphite) refractory after baking, and the decarburized layer corrodes rapidly after the steel is lifted. Graphite is a relatively valuable material. Corrosion and oxidation will lead to increased production costs and waste of energy materials. The hazards of high-temperature oxidation of graphite anode plates and the significant safety significance and energy-saving benefits of oxidation prevention are summarized. It is very important to effectively prevent the high-temperature oxidation rate, improve the energy-saving utilization rate of materials, and reduce the high-temperature safety accident rate of industrial materials.

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