The graphite electrode is a very important part of the kiln with electricity as the heat source. such as graphite electrodes for electric arc furnaces. Graphite electrodes belong to the special carbon materials in refractory materials. The raw materials for graphite electrodes production are mainly graphite. Get more info from the RS graphite electrode manufacturer.
Why use Graphite as the Raw Material for Graphite Electrodes Production?
Everyone’s understanding of graphite is that graphite is an allotrope of carbon. It has stable chemical properties and corrosion resistance. It is not easy to react with chemicals such as acid and alkali. At the same time, graphite is also used as a raw material for graphite electrodes.
Graphite has many special properties due to its special structure. And these properties happen to be necessary for graphite electrodes. Get a graphite electrode price.
(1) High-temperature resistance
The melting point of graphite is 3850 ± 50 ℃. Even after being burned by an ultra-high temperature arc, the weight loss is small and the coefficient of thermal expansion is also small. The strength of graphite strengthens with increasing temperature. At 2000 ℃, the strength of graphite doubles.
(2) Electrical and thermal conductivity
The conductivity of graphite is one hundred times higher than that of ordinary non-metallic ores. Thermal conductivity exceeds metal materials such as steel, iron, and lead. The thermal conductivity decreases with increasing temperature, and even at extremely high temperatures, graphite becomes an insulator. Graphite can conduct electricity because each carbon atom in graphite only forms 3 covalent bonds with other carbon atoms, and each carbon atom still retains 1 free electron to transfer charge.
(3) Thermal shock resistance
When graphite is used at room temperature, it can withstand drastic changes in temperature without damage. When the temperature changes suddenly, the volume of graphite does not change much, and no cracks will occur.
Raw Materials for Graphite Electrodes
Raw materials for graphite electrodes, which are mainly classified into the following categories:
Raw materials for artificial graphite electrode production.
All low-ash materials such as petroleum coke and pitch coke can be used to produce high-quality graphite electrodes. The pitch coke is added to increase the strength of the product.
- For the production of RP graphite electrodes, ordinary quality petroleum coke can be used as a raw material;
- Production of high-power graphite electrodes, using high-quality petroleum coke and some needle coke;
- To produce ultra-high-power graphite electrodes, high-quality needle coke must be used as a raw material;
- To produce high-purity graphite electrodes, petroleum coke with very low ash content is required.
In order to improve the lubricity and plasticity of the paste, and improve the electrical conductivity of the product, a part of graphite crushing is also added to the graphite electrode production ingredients.
Raw materials for the production of natural graphite electrodes.
Using selected natural graphite as raw material and coal pitch as binder, it can produce natural graphite electrode without graphitization. However, this type of electrode has large resistivity and low mechanical strength, and it is easy to break during use.
Raw materials for the production of recycled graphite electrodes.
Graphite materials are used as raw materials for cutting and scrap. After crushing, regenerated graphite electrodes can be produced without graphitization. The ash content of this type of electrode is less than 1%, the conductivity is slightly worse than the artificial graphite electrode, the resistivity is about 1.5 times that of the graphite electrode, but the effect is better than the natural graphite electrode.
RS Graphite Electrode Manufacturer
Graphite electrode is a conductive material for electric arc furnace steelmaking. With the demand for high-quality steel grades, steel mills are increasingly demanding the quality of graphite electrodes used in steelmaking. RS graphite electrode manufacturer, keeping pace with the times, aims to provide high-quality graphite electrodes for electric arc furnaces. After years of hard work, RS graphite electrodes have been exported to Russia, Chile, and other countries and regions. If you are looking for graphite electrode manufacturers to get free graphite electrode prices, please leave your needs below. We will reply to you in the shortest time.
