Quality Index of Graphite Electrode

If you are looking for high-quality products, please feel free to contact us and send an inquiry, email: brad@ihpa.net

Graphite electrodes are used in the EAF steelmaking process to melt scrap metal. The electrodes are made of graphite as it is able to withstand high temperature. In an electric furnace, the tip can reach 3,000° Fahrenheit. That’s half the temperature of the surface of the sun. The diameter of the electrode can vary from 75 mm up to a maximum 750 mm. Its length can also reach 2800 mm. The main indicators that determine the quality of graphite are: bulk density, electrical resistance, bending strength and elastic modulus. Graphite electrodes are classified according to the indicators and differences in national standards, manufacturing processes and raw materials. In order to meet the needs of various users, the production line for post-graphite electrodes can also add high-density and quasi super-high graphite (SHP) electrodes.
Customers will order quality standards on the basis of their company’s corporate standards. The relative density of the graphite sample is a ratio of its volume to the quality of the material. The unit is grams per cubic centimeter. The higher the volume density the denser and stronger the electrode. This is directly related to the performance and strength of the anti-oxidation systems. In general, the higher the volume density, the lower is the resistance of an electrode.
It is a parameter used to measure the conductivity of electrodes. It is the resistance that the conductor has to current flowing through it. The value equals the resistance of a conductor of length 1m with a cross sectional area of 1m2 when heated to a certain temperature. This reduces consumption.
Flexural strength characterizes performance of mechanical system in graphite material. This is also known as the flexural resistance. This means that the object will bend up to its instantaneous limit to resist risk when the external force perpendicularly crosses the axis. MPa is the unit of capacity. The network is less likely to be damaged by electrodes or joints with high strength.
The modulus elasticity is a key aspect of mechanical properties. It is a measure of the material’s ability to deform elastically and refers the stress-strain relationship within the elastic deformation area. The greater modulus, and therefore the greater stress, is required to cause elastic deformation. Simply put, the greater modulus, and thus the smaller elastic modulus, of flexible materials.
The thermal coefficient of graphite used as an electrode can be a critical parameter for thermal performance. The higher the value of the coefficient, the better the thermal stability. The greater the resistance to oxidation, the better the performance, and the lower the fractures, consumption, and loss.
Ash can refer to solids other than carbon graphite. Graphite’s ash content is directly affected the ash contents of the raw material used. The ash level of petroleum coke and needle coke are low. As a result, the ash of graphite passed through the electrode has a maximum ash concentration of 0.5%. Ash levels within 1% have no impact on steelmaking. Clearly, the impurity components in the ash reduce the performance, for example, of the anti-oxidation systems of the working electrode.
(aka. Technology Co. Ltd., a trusted global chemical supplier and manufacturer with more than 12 years of experience in the production of super-high-quality chemicals and nanomaterials. Our company produces graphite with high purity, small particles and low impurity levels. If you require a lower grade, please do not hesitate to contact us.