Graphite Electrode
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Graphite Electrode
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Superior Graphite Electrodes for High-Temperature Applications
1. Raw Material
The needle coke is 100% imported.
Pulverize and screen the coke Classify the screened coke according to grain size and store them in individual silos
2. Mixing
The raw material after proportioning will be mixed with a proper portion of coal tar and heated, to make it become paste with plasticity.
3. Forming
The paste after cooled to the process temperature will enter into the pressing machine, and forming as per The product specification.
4. Baking & Pitch Impregnation
In the baking furnace, the green electrode will be baked to the specified temperature as per the process requirement, then impreg-nated by coal tar as per specific process, to improve the electrode density and mechani cal strength, then baking again to improve electrode performance.
- Electrolysis Graphite Anode
Magnesium Electrolysis Graphite Anode
It is made of needle coke and pitch as main materi al through forming, baking, rebaking, impregnation, graphitization, anti-oxidant treatment and precise machining. It’s mainly used in magnesium electroly sis and sponge titanium smeling.
It features high thermal conductivity and mechani cal strength. It is used in magenesium and titanium smelting. It’s a kind of economic product to meet a long life requirement of magenesium and titanium furnace
| Items | Unit | LMM-MY-1 | LMM-MY-2 | |
| Bulk Density | g/cm3 | ≥ | 1.73 | 1.70 |
| Resistivity | u Qm | ≤ | 5.00 | 8.00 |
| Compressive Strength | MPa | ≥ | 29.00 | 29.00 |
| Flexual Strength | MPa | ≥ | 18.00 | 15.00 |
| Apparent Porosity | % | ≤ | 16.00 | 22.00 |
| Ash | % | ≤ | 0.30 | 0.50 |
| C.T.E | 10 −6/°c | ≤ | 2.00 | 3.00 |
- Carbon Block
1. Super Micropore Carbon Block
– It is made of calcined anthracite as main raw materials, with many additive agents, pitch as binder, through forming, baking under high temperature and machining.
– It features high thermal conductivity, good micro porosity and permeability, preventing blast furnace hearth from erosion. Fulfill the hearth requirements of large scale blast fur-пасе
2. High Thermal Conduction-Super Micropore Carbon Block
– It is made of high temperature elecrical calcined anthracite, artificial graphite with additive agents and pitch through forming, high temperature baking, and machining
– It features high thermal conductivity, good micro porosity and permeability, lowering the bottom temperature, preventing blast furmace hearth from erosion. It’s used for the upper part of bottom hearth of blast furnace
3. High Corrosion Resistance Carbon Block
– It is made of high temperature electrical calcined anthracite with additive agents and pitch through forming. high temperature baking, and machining.
– It features excellent resistance to hot corrosion and oxidation resistance index, and has the optimal coffi-cient of thermal conductivity, which can reduce the furnace body erosion rate of key parts, and effectively prevent the erosion by hot metal penetration
4. Semi-graphitic Carbon Block
– It is made of high temperature electrical calcined anthracite and medium temperature pitch through forming, high tem-perature baking, and final precise machining.
– It features high thermal conductivity and alkaline resistance. It’s used for the bottom of blast fur-nace
5. Micropore Carbon Block
– It is made of high temperature electrical calcined anthracite with additive agents and medium temperature pitch through forming, high temperature baking, and precise machining.
– It features better micro porosity and permeability, high molten iron erosion resistance. It’s used for bottom, hearth and upper position of taphole of blast furnace.
6. High Thermal Conduction Carbon Block
– It is made of high conduction graphite and pitch through forming, high temperature baking and
precise machining
– It features high thermal conductivity and dense structure and mainly is used as hearth block.
- Descriptions on product use
1. Transportation of graphite electrode
– Cover a rain-proof tarpaulin on the graphite electrodes in the course of long-distance transportation.
– It is important to use a wire rope when lifting the wooden-packaged electrodes with a lifting crane. It is for bidden to lift the electrodes with the steel packaging belts on the wooden-packaged.
– For the purpose of protecting the electrodes end and threads, it is not allowed to lift an electrode with a grappling iron hooking the electrode socket.
– Put sightly when loading and unloading the nipple box so as to prevent damage to the threads.
2. Storage of graphite electrode
– The electrodes should be put in a clean and dry place, do not remove the packaging betore use so as to prevent the dusts and debris from dropping onto the threads or into the electrode socket the precision of the electrode con-nection.
– The electrodes stored in the open area must be covered with a rain-proof tarpaulin.
– The electrodes should be stored in the storehouse neatly. The both sides of the electrodes should be well stacked to prevent from stack siiding.
– The stacking height of the scattered electrodes should not exceed 2.8 meters, while the electrodes packed in the boxed should not exceed 4 layers.
– The temperature of the storage places of nipple should nol be too high so as to prevent melting of the as phalt nipple bolt.
- Typical Properties of Graphite Electrode
| Item | Unit | NP | HP | UHP | ||||
| ≥0400 | ≤0450 | ≥0400 | ≤0450 | ≥0400 | ≤0450 | |||
| Electric Resistivity | Electrode | μα-m | ≤7.5 | ≤8.0 | ≤6.0 | ≤6.5 | ≤5.5 | ≤5.5 |
| Nipple | ≤5.5 | ≤5.5 | ≤4.5 | ≤4.5 | ≤4.0 | ≤3.8 | ||
| Transverse Strength | Electrode | Mpa | ≥8.0 | ≥7.0 | ≥10.5 | ≥10 | ≥10.5 | ≥10.0 |
| Nipple | ≥15.0 | ≥15.0 | ≥17.0 | ≥17.0 | ≥20.0 | ≥22.0 | ||
| Young's Modulus | Electrode | Gpa | ≤59.3 | ≤14.0 | ≤14.0 | |||
| Nipple | ≤14.0 | ≤16.0 | ≤22.0 | |||||
| Bulk Density | Electrode | g/cm³ | ≥1.54 | ≥1.65 | ≥1.68 | |||
| Nipple | ≥1.70 | ≥1.78 | ≥1.80 | |||||
| Coefficient of Thermal Expansion (100℃-600℃) | Electrode | 10°C | ≤2.9 | ≤2.4 | ≤1.5 | |||
| Nipple | ≤2.8 | ≤2.2 | ≤1.3 | |||||
| Ash | % | ≤0.2 | ≤0.2 | ≤0.2 | ||||
- Standard Dimensions of Graphite Electrodes
| Nominal Diameter | Diameter Allowance Range (mm) | Nominal Length | |||
| in | mm | min | max | in | mm |
| 8 | 200 | 200 | 205 | 60/72 | 1500/1800 |
| 9 | 225 | 225 | 230 | 60/72 | 1500/1800 |
| 10 | 250 | 251 | 256 | 60/72 | 1500/1800 |
| 12 | 300 | 302 | 307 | 60/72 | 1500/1800 |
| 14 | 350 | 352 | 357 | 72/80 | 1800/2100 |
| 16 | 400 | 403 | 408 | 72/80 | 1800/2100 |
| 17 | 450 | 454 | 460 | 72/82/94 | 1800/2100/2400 |
| 20 | 500 | 505 | 511 | 72/82/94 | 1800/2100/2400 |
| 22 | 550 | 556 | 562 | 72/82/94 | 1800/2100/2400 |
| 24 | 600 | 607 | 613 | 82/94/106 | 2100/2400/2700 |
| 28 | 700 | 708 | 714 | 94/106 | 2400/2700 |
- Conclusion:
Graphite electrodes are a vital component in steel manufacturing, particularly in electric arc furnaces (EAF) and ladle refining furnaces. Their exceptional electrical conductivity, high thermal resistance, and durability enable efficient energy transfer and high-temperature performance, making them indispensable for the modern steel industry. With the growing demand for high-quality steel, the need for reliable graphite electrodes continues to rise.
