Graphite electrode special characteristics

#Graphite #electrodes are made on the basis of petroleum coke and needle coke composition by long-term baking (more than 100 hours) and subsequent graphitization at a temperature of about 2,500?°C. During heat treatment, the crystal lattice is recrystallized, which causes a radical change in the properties of the material.

The main properties of graphitized electrodes include:

• economic efficiency of application—due to a decrease in resistivity, significant energy savings are observed during the process of melting metals and alloys;
• high electrical conductivity—in comparison with coal, electrical resistance decreases 5-6 times, which makes it possible to use currents of higher density (2-3 times);
• good thermal conductivity and heat resistance—the material can withstand heating temperatures up to 3,000°С;
• chemical purity—absence of sulfur compounds in the composition, minimal ash content.

Chemical inertness is also worth mentioning, that allows using the equipment in an aggressive environment.

The main advantage of graphite-based electrodes is their economic feasibility. Reduced energy consumption in melting furnaces and electric arc units minimizes production costs. It is also worth mentioning that they are stronger and more durable than coal ones. They conduct electricity better and do not contaminate the melt with carbon.