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 tip of an electrode to 3000 degrees Fahrenheit. That’s half the temperature of the sunlight. It can vary in size from 75mm diameter to a maximum length of 750mm. And the longest electrodes can be as long as 2800mm. These are key indicators for graphite electrode performance and quality: bulk density, electrical resistance r, bending force, elastic modulus e, thermal expansion coefficients a, and ash content %. These graphite-electrode indicators, as well as the differences among different manufacturing processes and standards in various countries, are what distinguish graphite electrodes into three types: ordinary power graphite (RP), ultra high power graphite (HP), or 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 needs.
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 the graphite-electrode material sample’s quality to its volume. The unit of measure is 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 against current is measured when current passes through the conductor. The resistance value of a conductor of length 1m with cross-sectional area 1m2 at a temperature of certain reduces the 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 material’s elastic ability. This refers the strain-stress ratio within the elastic limit. Simply put, the larger the modulus, the higher is the stress needed for 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. The raw material used has a direct impact on graphite’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 anti-oxidation systems of working electrodes will be affected by impurities found in the ash.
(aka. Technology Co. Ltd. (aka. Our company produces graphite powder with high purity, small particles size, and low impurities. We can help you if the price is lower.
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 the graphite-electrode material sample’s quality to its volume. The unit of measure is 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 against current is measured when current passes through the conductor. The resistance value of a conductor of length 1m with cross-sectional area 1m2 at a temperature of certain reduces the 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 material’s elastic ability. This refers the strain-stress ratio within the elastic limit. Simply put, the larger the modulus, the higher is the stress needed for 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. The raw material used has a direct impact on graphite’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 anti-oxidation systems of working electrodes will be affected by impurities found in the ash.
(aka. Technology Co. Ltd. (aka. Our company produces graphite powder with high purity, small particles size, and low impurities. We can help you if the price is lower.
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