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What are the consumption mechanisms of graphite electrode in electric furnace steelmaking?

What are the consumption mechanisms of graphite electrode in electric furnace steelmaking?

 

1.Graphite Electrode Introduction

High power graphite electrode is produced by high quality Petroleum Coke which was made in Petro China Fushun petrochemical production, the needle coke imported from Japan and modified middle temperature pitch as raw material, according to the high power graphite electrode production process , the process are calcination, ingredients, kneading, molding, baking, high pressure impregnation, the second roasting, graphitization and machining , the nipples are made by two times impregnation and three times baking , the material is needle coke imported from Japan .

Materials:Needle coke,CPC,Coal Pitch;

Process:Petroleum coke,Crushing, calcining

Forming,Baking,Impregnation,Graphitization,Machining, Final product.

Grades:RP/HP/SHP/UHP;

Application:Used in EAF/LF to make steel.

Category:

RP---regular powder electrode

HP---high-power electrode

UHP---ultra-high-power electrode

Diameter: 150-1276mm

Length: 1200-2700mm

Property

1. Low resistivity

2. Good conductivity

3. Low ash

4. Compact and uniform structure

5. Good oxidation resistance

Advantages

√ High temperature strength

√ Low thermal expansion

√ Excellent thermal and electrical conductivity

√ Appropriate machinability capability

 

【Quality System of Top Graphite Electrode Manufacturer-Rongxing Group】

       Ringxing Group is China’s leading supplier of graphite electrode, electrode paste, CPC and carbon block. Possessing sophisticated production lines and inspection equipments, providing diverse lines of carbon metallurgical products backed by expert R&D technical support, we develop closer customer relationships and taking on a larger role in the total supply and manufacturing chain. Our products meet and exceed the challenges of thousands of applications, and continue to be innovated. We stand for the maxims of uncompromising quality, outstanding customer service and operational dependability. Our highest priorities for our customers are quality and cost. It is important that our customers benefit from our state-of-the-art products at unbeatable price-performance ratios. We implement custom solutions with the highest flexibility and precision. Our dedicated employees, the true carbon metallurgical material experts, make Rongxing successful globally.

       As an influential and responsible supplier, we are able to provide our customers with more thoughtful services and technical support. Rongxing‘s strengths extend far beyond the processing of graphite electrode and electrode paste. Depending on customer requirements, the company offers services including: application-engineering consulting, selection of materials, field supervisors, and much more. Rongxing Group offers a complete set of carbon metallurgical products with a range of products for one-stop shopping. Decades of product optimization have turned Rongxing’s products into a highly perfected and cost-effective solution. 
     
       Customer’s satisfaction is our ultimate goal. We believe our devotion to carbon metallurgical industry will help us to achieve global leadership in providing world-class cost effective, superior quality services to customer in the world.



【Graphite Electrode】

       Using coal pitch as binder, our graphite electrode which is mainly made of petroleum coke and needle coke is being made through the process of calcination, compounding, kneading, pressing, baking, impregnation, graphitization and machining. 

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【Application of Rongxing Graphite Electrode】

    1. Rongxing graphite electrode is being used in electric arc steelmaking furnace Graphite electrode is mainly used in electric furnace steelmaking. Electric furnace steelmaking uses graphite electrodes to introduce current into the furnace. A strong current generates an arc discharge through the gas at the lower end of the electrode, and uses the heat generated by the arc to smelt.

    2. Rongxing graphite electrode is being used in ore-heating furnaces Graphite electrode ore-heating furnaces are mainly used to produce ferroalloys, pure silicon, yellow phosphorus, matte and calcium carbide, etc., which is characterized by electrical conductivity.

    3. For resistance furnaces, graphitization furnaces for producing graphite products, melting furnaces for melting glass, and electric furnaces for producing silicon carbide are all resistance furnaces.

    4. Used for processing a large number of graphite electrode blanks; also used for processing into various crucibles, graphite boats, hot die casting molds and heating elements for vacuum electric furnaces, etc...


【Graphite Electrode Specifications】

    HP: φ600-φ650mm
    Resistivity: 5.8-6.6 μΩm
    Modulus of Rupture: 10.0-13.0 Mpa
    Young's Modulus: 8.0-12.0 Gpa
    Bulk Density: 1.64-1.68 g/cm3
    CTE: 1.6-1.9  10-6/℃
    Ash: 0.3%
    
   

【Rongxing Graphite Electrode's Specialties】

      Our graphite electrode products have strict consumption control, low resistivity, low ash content, high temperature strength, low thermal expansion coefficient, good thermal conductivity and electrical conductivity, compact structure, high oxidation resistance, high mechanical stability and other significant advantages. Its content of UHP needle coke is up to 80%, and raw materials are imported from Japan and South Korea. The UHP graphite electrodes suit the operating conditions of modern arc furnaces and those main properties are of decisive importance for obtaining economical consumption rates.

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【Special Notes for Rongxing Graphite Electrode】

    Being hard and brittle, artificial graphite electrode shall be specially handled. Proper operation may reduce the consumption and cost.

    1, Use special hoist tools to hoist the graphite electrode. It is strictly forbidden to prize electrode ends up with crowbar. It must be handled with great care during transportation to avoid damage.

    2, Graphite electrode must be kept away from being moistened or wetted by rain, snow and water, and must be kept dry. It must be dried in the furnace before use. The drying temperature in  the furnace shall be less then 100℃.The drying period shall be not less than 48 hours.

    3, Not to be stored up near clay,slag etc.to avoid surface pollution and increasing resistivity. 

    4, Carefully checking before connection, make sure that the socked and nipple thread is not damaged, nipple pitch plug is in. Nipple screw shall not be damaged during lifting.

    5, Blow the nipple and socket threads with compressed air.

    6,Graphite electrode must be connected contacted closely and straightly.Use moment spanner for connecting electrode with suitable force.The gap between electrodes shall less than 0.4mm.

    7, The holding device must hold the electrode tightly,good contact and no arc.Otherwise,the connecting area will get red and oxidized and thin,leading breakage.

    8, Threaded portion of nipple socket shall not be damaged during hoisting by metal plug.Hoisting plug shall spin out and keep nipple socket clean.

    9, Lifting device of electrode must move stably when moving electrode.carefully check the  position of furnace cover after being repaired.To seal the cover with refractory to prevent up electrode from being oxidized by fire.

    10, The holding device of electrode shall hold the electrode beyond the socket area.
    For charging the furnace, the large scrap should be put at the bottom, the small one on the top, Charge material with low electric conductivity shall not been put on the top. In the course of melting, un-melted material shall be taken in time to avoid electrode breaking by falling material.
 

 

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UHP Graphite Electrodes
Resistance:4.8-5.8
Density:>1.68
CTE:1.1-1.4
Young Modulue:9.0-13.0
Rupture Modulus:10.0-14.0
HP Graphite Electrodes
Resistance:5.8-6.6
Density:>1.62
CTE:1.4-2.2
Young Modulue:13.0-16.0
Rupture Modulus:10.0-11.0
RP Graphite Electrodes
Resistance:6.6-9.0
Density:>1.53
CTE:1.4-2.2
Young Modulue:9.0-13.0
Rupture Modulus:11.0-15.0
Goose Shaped & Trapezoid Shaped
Goose Shaped:30mm*60mm*80mm;
Trapezoid Shaped:Bottom Length14cm,Bottom Wieth 10cm;Height 9.5cm;Top Legnth 9cm,Top Width 4cm.
Ash content 2-10%
Resistivity 55-90 uΩm
V.M 10.0-15.0
Density >1.46g/cm3
Compression Strength >18Mpa
Extensibility 6-20
Carbon Electrode Paste(Cylinder)
Diameter:600mm;
Length:1000mm;
Ash content 2-10%
Resistivity 55-90 uΩm
V.M 10.0-15.0
Density >1.46g/cm3
Compression Strength >18Mpa
Extensibility 6-20
Various types of electrode paste
petroleum coke, asphalt in the melting bath dehydration, melting, in proportion to join the HunNieGuo kneading, and then formed calcined together.With the characteristics of low resistance coefficient used in the electric equipment such as ferroalloys fur
Various types of electrode paste
petroleum coke, asphalt in the melting bath dehydration, melting, in proportion to join the HunNieGuo kneading, and then formed calcined together.With the characteristics of low resistance coefficient used in the electric equipment such as ferroalloys fur
Electrode paste
petroleum coke, asphalt in the melting bath dehydration, melting, in proportion to join the HunNieGuo kneading, and then formed calcined together.With the characteristics of low resistance coefficient used in the electric equipment such as ferroalloys fur
Cylindrical electrode paste
petroleum coke, asphalt in the melting bath dehydration, melting, in proportion to join the HunNieGuo kneading, and then formed calcined together.With the characteristics of low resistance coefficient used in the electric equipment such as ferroalloys fur

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