When to Use HP Graphite Electrode？
HP GRAPHITE ELECTRODES – THE DIAMETERS RANGE FROM ...
HP graphite electrode is mainly used for high power electric arc furnaces with the current density range of 18–25 A/cm2. HP graphite electrode is the conducting element for electric arc furnaces steelmaking. It is made of petroleum coke, needle coke, coal pitch and produced by a series of strict production processes. High-current lines insert through the graphite electrode port inside the furnace body. This will releases electric energy in the arc furnace to heat the furnace.The demand for the larger diameter electrodes has been increasing as EAF furnace sizes become larger. Graphite electrodes with diameter of 500 mm or 600 mm have become increasingly popular in recent years.
Features
- Anti-oxidation treatment for longevity.
- High-purity, high-density, strong chemical stability.
- High machining accuracy, good surface finishing.
- High mechanical strength, low electrical resistance.
- Resistant to cracking & spalling.
- High resistance to oxidation and thermal shock.
Application
- Graphite electrodes are widely used for production of alloy steels, metal and other nonmetallic materials, etc.
- DC electric arc furnace.
- AC electric arc furnace.
- Submerged arc furnace.
Specification
DiameterResistanceDensityFlexure StrengthElastic ModulusAsh ContentCTECurrent LoadCurrent Density (≤, µΩ·m)(≥, g/cm3)(≥, MPa)(≤, GPa)(≤, %)(100 °C – 600 °C)(A)(A/cm2) inchmm(≤, 10-6/°C) ...32.––25 ...32.––25 ...32.––25 ...32.––24 ...32.––24 ...32.––24 ...32.––24 ...32.––24 ...32.––23 ...32.––23Graphite Electrode Size & Tolerance
Diameter (mm)Length (mm) Nominal DiameterActual DiameterNominal LengthToleranceShort Length (inch)(mm)(max.)(min.)(rough spot) ±100-275 / / / /// /// /// /// //Surface Quality
There should be less than two defects or holes on the electrode surface, the maximum size of which is mentioned in the below chart.
There should be no transverse crack on the electrode surface. For the longitudinal crack, the length should be less than 5% of the electrode circumference and the width should be 0.3 to 1.0 mm.
The width of black area on electrode surface should be less than 1/10 of the electrode circumference and the length should be less than 1/3 of the electrode.
Everything You Need to Know About HP Graphite Electrode(ms,es,it)s
HP graphite electrodes are a vital component in the production of steel and other metals in industries such as metallurgy, minerals, and energy. These electrodes are known for their high thermal conductivity, low electrical resistance, and exceptional mechanical strength, making them ideal for use in electric arc furnaces. One of the key features of HP graphite electrodes is their ability to withs
HP graphite electrodes are a vital component in the production of steel and other metals in industries such as metallurgy, minerals, and energy. These electrodes are known for their high thermal conductivity, low electrical resistance, and exceptional mechanical strength, making them ideal for use in electric arc furnaces.
One of the key features of HP graphite electrodes is their ability to withstand high temperatures, making them suitable for applications where intense heat is required for the melting and refining of metals. Their low electrical resistance ensures efficient energy transfer, while their mechanical strength allows them to withstand the rigorous conditions of the steelmaking process.
In the metallurgy, minerals, and energy industry, HP graphite electrodes play a crucial role in the production of steel, aluminum, silicon, and other metals. They are used in electric arc furnaces to generate the intense heat needed to melt scrap metal and other raw materials, allowing for the production of high-quality metal products.
HP graphite electrodes offer several benefits, including improved energy efficiency, reduced production costs, and increased productivity. Their durability and reliability make them a cost-effective choice for steelmakers looking to enhance their operations and achieve consistent quality in their products.
Overall, HP graphite electrodes are essential components in the metallurgy, minerals, and energy industry, providing the high-performance capabilities required for the production of steel and other metals. Their unique properties and benefits make them a valuable asset for steelmakers looking to optimize their processes and achieve superior results.
The difference between UHP graphite electrode and HP graphite electrode
The raw materials of UHP and HP graphite electrodes are different, resulting in different physical and chemical indicators of the graphite electrodes produced. They are suitable for steelmaking in ultra-high-power electric arc furnaces and high-power electric arc furnaces. Let’s introduce what uhp electrodes represent. The difference between UHP graphite electrode and HP graphite electrode.
1. What does the uhp electrode represent?
UHP is the abbreviation of ultra high power in English, representing the category of ultra-high power graphite electrodes. According to the power, graphite electrodes are divided into: RP ordinary power graphite electrodes, HP high power graphite electrodes and UHP ultra-high power graphite electrodes.
The three graphite electrode models are suitable for electric arc furnaces of different power levels. RP is suitable for ordinary power electric arc furnaces with a melting capacity of 300Kv.A/t per ton, and HP is suitable for high-power electric arc furnaces with a melting capacity of 400Kv.A/t per ton. UHP is suitable for ultra-high power electric arc furnaces with a melting capacity of 500~Kv.A/t per ton.
RP electrode is produced by ordinary grade petroleum coke, which has low requirements on raw materials and low graphitization temperature, so it has high resistivity, large linear expansion coefficient, poor thermal shock resistance, and low allowable current. It is suitable for ordinary steelmaking. use.
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HP electrode uses high-quality petroleum coke plus needle coke and coal pitch, etc. After impregnation treatment, the performance is higher than that of RP electrode, the resistivity is relatively low, and the allowable current density is large.
UHP graphite electrode is produced by high-grade needle coke, the graphitization temperature is as high as ~°C, and the graphitization heat treatment is carried out in the inner string graphitization furnace, so it has lower resistivity, small linear expansion coefficient and excellent resistance to The thermal shock performance makes it free from cracking and breaking, allowing the passage of high current density, which will shorten the melting time and improve production efficiency.
2. The difference between UHP graphite electrode and HP graphite electrode
1. The raw materials of the two are different, resulting in different physical and chemical indicators and allowable current capacity
2. The production cycle of UHP graphite electrode is longer than that of HP electrode, and it needs to go through three immersion and four bakes, which also leads to higher cost than HP graphite electrode.
3. There are few manufacturers of graphite electrodes with specifications above UHP 600mm. In the early days, they relied on imports for a long time. Now the production diameter of Dan carbon graphite electrodes can reach up to 800mm.
4. The smelting time is shortened. For example, it takes 60 minutes for a 10T ton electric arc furnace to smelt molten steel with HP electrodes, and only 45 minutes for UHP graphite electrodes, which not only shortens the time, reduces power consumption, but also consumes less electrodes.
All You Need to Know About HP Graphite Electrodes
HP graphite electrodes are widely used in the steelmaking industry for electric arc furnaces due to their excellent electrical conductivity, high temperature resistance, and low thermal expansion. These electrodes are made from high-quality graphite and are essential for the production of steel and other metals. One key advantage of HP graphite electrodes is their ability to withstand high tempera
HP graphite electrodes are widely used in the steelmaking industry for electric arc furnaces due to their excellent electrical conductivity, high temperature resistance, and low thermal expansion. These electrodes are made from high-quality graphite and are essential for the production of steel and other metals.
One key advantage of HP graphite electrodes is their ability to withstand high temperatures, making them ideal for use in demanding industrial processes. They also have low ash content, which helps to minimize impurities in the final product. Additionally, HP graphite electrodes are known for their high mechanical strength and resistance to oxidation.
In the manufacturing process, HP graphite electrodes undergo a series of treatments to ensure their quality and performance. These treatments include baking, impregnation, and graphitization, which enhance the electrodes' properties and make them suitable for use in various applications.
HP graphite electrodes play a crucial role in the steelmaking process by providing a reliable source of electrical energy for melting scrap metal and other raw materials. They help to reduce energy consumption and improve the overall efficiency of steel production.
Overall, HP graphite electrodes are a vital component in the production of steel and other metals, contributing to the advancement of the non-metallic mineral products industry. Their unique properties and benefits make them a preferred choice for many steel manufacturers around the world.