UHP graphite electrode is mainly used for smelting scrap steel in eaf steelmaking production. As a high-temperature resistant conductor, it can easily melt various high-melting-point alloys in the arc temperature zone (up to - °C ) in the electric arc furnace connected to a three-phase transformer.
UHP graphite electrodes can also be used in ladle refining furnaces, continuous casting and other processes. The purpose of refining is to improve the quality of steel. This process uses the arc generated between the electrode and the molten steel to heat the electric arc furnace steelmaking. This will help steel mills achieve high production, high quality and low consumption.
( In AC electric furnace) (In DC electric furnace) (In Ladle refining furnace)
High temperature resistance: It can withstand high temperatures during the electric arc furnace (EAF) steelmaking process. Even in harsh high temperatures up to degrees Celsius, it will not melt or deform or be damaged under the action of strong arcs.
Low specific resistance: The specific resistance of the electrode body is below 5.0g∕㎝3, and the nipple is below 4.0g∕㎝3. At this time, the resistance to current is small, reducing power loss.
High density: The overall structure has smaller porosity, reducing electrode consumption.
Good electrical conductivity: They have low ash content, are heat-resistant and corrosion-resistant. Therefore they are excellent conductive materials used in electric arc furnaces at high temperatures.
High mechanical strength: During the kneading process, the coke particles are mixed evenly and bonded firmly. Therefore, the flexural and compressive strength are high.
Small thermal expansion coefficient: Because needle coke is added during the production process, the blank is more easily graphitized at high temperatures above ℃. The better the degree of graphitization, the smaller the thermal expansion coefficient.
The resistivity of UHP graphite electrode is the lowest among all electrode types. This means that it can pass higher density current without breaking or deforming during arc furnace smelting.
Jinsun uses needle coke in production to enhance the thermal shock resistance of the electrode itself. This makes it have a lower thermal expansion coefficient and can better resist rapid changes in temperature without being damaged.
The density of the double-impregnated UHP graphite electrode has been greatly improved. So, even at high temperatures, it oxidizes slowly, reducing the number of replacements.
Its diameter can be more than 750mm, which can meet the smelting needs of 100MT ultra-high power arc furnaces.
It is important to note that the price of it may vary due to market conditions, supply and demand dynamics, and other external factors. In addition, the rising cost of raw materials such as needle coke has also driven the price.
As a graphite electrode producer in China, Jinsun has a complete production line, including raw material mixing, roasting, impregnation, graphitization, processing, etc. Our factory manufacture and supply high quality UHP grade graphite electrodes for your EAF steelmaking production.
≤
6.0 6.5 6.5 5.5 Nipple 5.0 5.5 5.5 4.5 Transverse strength Electrode ΜРa≥
11.0 10.5 10.5 11.0 Nipple 16.0 15.0 15.0 16.0 Elastic modulus Electrode GРa≤
14.0 14.0 14.0 14.0 Nipple 18.0 18.0 18.0 18.0 Bulk Density Electrode g∕㎝3≥
1.65 1.65 1.66 1.68 Nipple 1.76 1.76 1.74 1.75 C.T.E（100～600℃）
Electrode 10-6∕℃≤
1.5 1.5 1.4 1.4 Nipple 1.4 1.4 1.3 1.3 Ash content % ≤ 0.2 0.2 0.2 0.2Capacity（A）
Current Density（A/cm2）
300 12 ~ 20~32 350 14 ~ 20~32 400 16 ~ 19~32 450 18 ~ 19~29 500 20 ~ 18~29 550 22 ~ 17~28 600 24 ~ 17~27 700 28 ~ 18~24Generally speaking, there are three types of graphite electrodes according to different powers, namely, UHP, HP, and RP. However, some manufacturers will produce SHP graphite electrodes. This grade of electrode is between HP and UHP grades, and its price is relatively low.
Graphite electrodes are essential components in the steelmaking industry,playing a crucial role in the production of steel through the electric arc furnace (EAF) process.
Graphite electrodes are essential components in the steelmaking industry, playing a crucial role in the production of steel through the electric arc furnace (EAF) process. Among the various types of graphite electrodes available, Ultra High Power (UHP) graphite electrodes are known for their exceptional performance and durability. In this article, we will delve into the details of UHP graphite electrodes, their characteristics, applications, and the significance of their use in steelmaking.
What is UHP Graphite Electrode?
UHP graphite electrodes are premium quality electrodes designed for high-performance applications in electric arc furnaces. These electrodes are manufactured using high-quality petroleum coke, needle coke, and coal tar pitch, which are processed through a series of steps including crushing, calcining, milling, and graphitization. The resulting product is a graphite electrode with superior electrical conductivity, thermal resistance, and mechanical strength.
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Characteristics of UHP Graphite Electrode
1. High Electrical Conductivity: UHP graphite electrodes exhibit excellent electrical conductivity, allowing for efficient transfer of electrical energy to the electric arc furnace. This property is crucial for maintaining the required temperature and facilitating the melting of raw materials in the steelmaking process.
2. Thermal Resistance: UHP graphite electrodes are designed to withstand extreme temperatures and thermal shocks during the steelmaking process. Their high thermal resistance ensures that they can endure the intense heat generated in the electric arc furnace without compromising their structural integrity.
3. Mechanical Strength: These electrodes possess exceptional mechanical strength, enabling them to withstand the mechanical and thermal stresses encountered during the steelmaking process. Their robust structure and resistance to breakage make them highly reliable for prolonged use in demanding industrial environments.
4. Low Consumption Rate: UHP graphite electrodes are known for their low consumption rate, which translates to longer service life and reduced downtime for electrode replacement. This characteristic contributes to cost savings and improved operational efficiency for steel producers.
Applications of UHP Graphite Electrode
The primary application of UHP graphite electrodes is in the steelmaking industry, particularly in the electric arc furnace (EAF) steel production process. Electric arc furnaces are widely used for melting and refining steel scrap to produce high-quality steel products. UHP graphite electrodes play a critical role in this process by serving as the conductive medium for the electric arc, which is responsible for heating and melting the raw materials.
Additionally, UHP graphite electrodes find applications in other industrial processes that require high-temperature operations and electrical conductivity. These may include the production of ferroalloys, silicon metal, and other specialty alloys, as well as certain chemical and metallurgical processes that rely on electric arc heating.
Significance of UHP Graphite Electrode in Steelmaking
The use of UHP graphite electrodes in steelmaking offers several significant advantages that contribute to the efficiency and quality of the steel production process.
1. Enhanced Energy Efficiency: UHP graphite electrodes enable efficient energy transfer to the electric arc furnace, leading to improved energy utilization and reduced power consumption per ton of steel produced. This contributes to lower operating costs and a more sustainable steelmaking process.
2. Consistent Quality of Steel: The high thermal conductivity and stability of UHP graphite electrodes ensure uniform heating and melting of the steel scrap, resulting in consistent quality and chemical composition of the final steel product. This is essential for meeting the stringent quality standards required by various industries.
3. Increased Productivity: The superior performance and durability of UHP graphite electrodes allow for prolonged and uninterrupted operation of the electric arc furnace, leading to higher productivity and throughput in steel production. This is particularly beneficial for meeting the demands of a rapidly growing steel market.
4. Environmental Benefits: UHP graphite electrodes contribute to environmental sustainability by enabling cleaner steelmaking processes. The use of electric arc furnaces with UHP graphite electrodes reduces emissions of greenhouse gases and pollutants compared to traditional steelmaking methods, aligning with global efforts to mitigate climate change.
In conclusion, UHP graphite electrodes play a vital role in the steelmaking industry, offering superior performance, durability, and efficiency in electric arc furnace operations. Their exceptional characteristics and applications make them indispensable components in the production of high-quality steel products. As the steel industry continues to evolve, the demand for UHP graphite electrodes is expected to grow, driven by the need for sustainable and technologically advanced steelmaking processes.
Graphite Electrodes find application in manufacture of Steel and other non-ferrous metals through the Electric Arc Furnace and the Laddle Furnace routes. It is used as a consumable for conducting high current at low voltage which is necessary for melting and / or alloying processes.
Graphite is the unique material for Electrodes as it optimally fulfils the requirements on the following criteria :
What is the Use of UHP Graphite Electrode?
Graphite electrodes are one of the essential components in electric arc furnaces used for the production of steel and other metals. These electrodes play a crucial role in the melting and refining process, providing the necessary electrical energy to generate heat and facilitate chemical reactions within the furnace. Among various types of graphite electrodes available, the use of Ultra High Power (UHP) graphite electrodes has gained significant popularity in recent years. In this article, we will explore the applications and advantages of UHP graphite electrodes.
UHP graphite electrodes are manufactured using high-quality needle coke as the raw material. The unique physical and chemical properties of needle coke make it ideal for the production of high-performance graphite electrodes. These electrodes have a lower electrical resistance, which allows for higher current carrying capacity and more efficient energy transfer. As a result, UHP graphite electrodes are widely used in electric arc furnaces with larger furnace capacities.
Applications of UHP Graphite Electrodes.
1. Steel Production: The primary application of UHP graphite electrodes is in the steel industry. As mentioned earlier, these electrodes are used in electric arc furnaces for the production of steel. They provide the necessary electrical energy to melt the raw materials and facilitate chemical reactions, such as the removal of impurities and the adjustment of alloy composition. UHP graphite electrodes are particularly suitable for furnaces with higher power requirements and longer electrode lengths.
2. Non-Ferrous Metal Production: Apart from steel, UHP graphite electrodes also find applications in the production of non-ferrous metals, such as aluminum, copper, and nickel. UHP graphite electrodes are used in smelting processes to generate the heat required for melting the metal feedstock. The excellent thermal conductivity and high current-carrying capacity of UHP graphite electrodes make them ideal for these applications.
Advantages of UHP Graphite Electrodes.
1. High Conductivity: UHP graphite electrodes have a low electrical resistance, enabling efficient energy transfer and higher current-carrying capacity. This attribute allows for faster melting and a more productive steelmaking process. The high conductivity of UHP graphite electrodes also reduces power consumption, leading to cost savings for steel producers.
2. Superior Mechanical Strength: UHP graphite electrodes exhibit excellent mechanical strength, which is crucial for withstanding the extreme operating conditions inside electric arc furnaces. These electrodes can withstand high levels of heat, pressure, and mechanical stress, ensuring long-lasting performance and reduced downtime.
3. Lower Consumption Rate: UHP graphite electrodes have a significantly lower consumption rate compared to other types of graphite electrodes. The use of high-quality needle coke as a raw material and advanced manufacturing processes contribute to the electrodes' improved resistance to oxidation and thermal shock. This results in reduced electrode wear, longer service life, and lower replacement costs.
In conclusion, UHP graphite electrodes are key components in electric arc furnaces used for steel and non-ferrous metal production. They provide the necessary electrical energy for melting and refining processes, offering advantages such as high conductivity, superior mechanical strength, and lower consumption rate. Steel producers can benefit from using UHP graphite electrodes in terms of improved productivity, cost savings, and overall operational efficiency.