The graphite electrodes are made with petroleum coke, coal asphalt as a binder, and needle coke as amassed. The manufacturing procedure includes; forming, calcination, baking, graphitization, impregnation, and machining. It discharges electric energy in form of an electric arc in an electric arc furnace.
The cathode which warms and dissolves the charge can be separated into a typical force graphite anode, a powerful graphite terminal, and a super high force graphite cathode according to the quality file.
The difference in graphite electrode price depends on how the product has been manufactured, which means high scale procedure has been used with standard raw materials, or a regular one. However, the following are the general manufacturing steps of the graphite electrode
Choosing Raw material – Graphite electrodes are usually made of high-quality calcined needle coke
Medium crushing & sieving – In the next step, the needle coke is broken inside the machine and sifted, and then balanced as per the recipe requirements
Rubbing – After getting done with batching here, raw materials are then mixed with a certain amount of asphalt by heating, and kneading to make a plastic paste
Pressed – Once getting done with mixing and kneading, the paste is cooled to process temperature, then pressed further into the concerned machine according to product specifications
Roasting – For roasting furnace, the "raw embryo" electrode is roasted at a specified temperature following the technological requirements, then the roasted product is saturated with special soaked asphalt as per the precise technological process for improving mechanical strength, and product density. After this, the infused product is roasted again to improve product performance
Graphitization – Lastly, the secondary roasted products are electrified in a graphitized resistance furnace, then heated to 3000℃, this allows carbon atom structure to get rearranged in a specific crystal form, and finally, carbon is converted into graphite electrode.
The graphite electrode price also varies as per the manufacturer brand image, and demand in applications.
