Quality Index of Graphite Electrode

Graphite electrodes are used primarily in the EAF steelmaking process for melting scrap steel. Because it is resistant to high temperatures, graphite electrodes are made. An electric arc furnace can heat the electrode to 3000 degrees Fahrenheit. That’s half the temperature of the earth. You can find electrode sizes ranging in size from 75 mm to maximum 750 mm and as long as 2800 mm.
These are key indicators for graphite electrode performance and quality: bulk density, electrical resistivity, bending strengths, elastic modulus E and thermal expansion coefficient. The indicators for graphite are the following: bulk density db, electrical resistivity, bending strength, elastic modulus E and thermal expansion coefficient. Graphite is divided into three types of electrodes: ordinary power graphite (RP), high-power graphite (HP) and ultrahigh-power graphite (UHP). The plant that produces graphite can also produce graphite-electrodes with high density graphite (HD) or quasi-super-high (SHP), according to different functional requirements.
National standards are the foundation of each company’s corporate standards. Customers will create their own quality standards. A relative volume density measures the proportion of graphite material samples that are quality managed to the total volume. This unit is 1 g/cm3. A working electrode’s volume density determines its strength and efficiency. It is generally true that the electrode’s resistivity will be lower if it has a greater volume density.
For measuring conductivity of electrodes, resistance is an indicator. The resistance of the conductor to current is measured when current passes through it. This is the resistance for a conductor of length 1m with cross-sectional area 1m2 at a temperature of certain. It helps reduce consumption.
It is an indicator of how well the graphite-structure material’s mechanical systems perform. Also known as the Flexural Strength, it is a measure of how strong the graphite structure material’s mechanical system performs. The object will bend to the immediate limit set by an external force to resist risk if the force exerted is parallel to its axis. Capacity is measured in MPa. When using the network, high-strength joint and electrodes are less likely break.
Modulus of Elasticity is an important part of mechanical property. The modulus of elastic is an indicator to determine the elastic deformation potential of a material. This refers the stress-strain relationship within the elastic limit. Simply put, the larger the elastic modulus for brittle materials is, the greater will be the stress needed to create elastic deformation.
An important parameter for thermal performance, the thermal expansion coefficient of graphite is an electrode. Chinese products are more stable if their thermal expansion coefficient is lower than it is. Performance can be reflected in the lower consumption of the product and the reduced fractures.
The term ash refers to any other component in solid products than carbon graphite. As graphite has a direct relationship with the amount of ash in its raw materials, the content of these raw materials can directly impact the electrode’s ash contents. Low ash levels are found in petroleum coke needle coalke. The electrode’s ash contents should be no more than 0.5%. A ash content below 1% will have little effect on steelmaking. The performance of the antioxidation system on the electrode will be affected by the presence of impurities.
Buffalotours (aka. Buffalotours advanced materials. We are a global supplier of chemical materials and manufacturer. Our company has over 12 years’ experience in manufacturing super-high-quality chemicals. Our company produces graphite powder with high purity, small particles size, and low impurity. We can help you if the price is lower.

Inquiry us

    Bookmark the permalink.

    Comments are closed.