Guide to Graphite Electrodes
| Unit | AC Furnace | DC Furnace | |||
|---|---|---|---|---|---|
| 350~450mm 14"~18" |
500~700mm 20"~28 |
550~800mm 22"~32" |
|||
| Features | RP | UHP | UHP | UHP | |
| Bulk density | g/cm3 | 1.58~1.70 | 1.65~1.76 | 1.66~1.74 | 1.68~1.75 |
| Specific resistance | μΩm | 6.0~8.5 | 4.5~6.5 | 4.5~6.5 | 4.2~5.5 |
| Young's modulus | kN/mm2 | 8~12 | 11~16 | 9~14 | 9~13 |
| GPa | 8~12 | 11~16 | 9~14 | 9~13 | |
| kgf/mm2 | 800~1,200 | 1,100~1,650 | 950~1,400 | 900~1,300 | |
| Bending strength | N/cm2 | 1,000~1,400 | 1,200~1,800 | 1,000~1,500 | 1,000~1,500 |
| MPa | 10~14 | 12~18 | 10~15 | 10~15 | |
| kgf/cm2 | 100~140 | 120~180 | 100~150 | 100~150 | |
| Thermal expansion coefficient (R.T. to 400°C) |
×10-6/゚C | 0.8~1.5 | 0.8~1.5 | 0.5~1.0 | 0.5~0.9 |
| ×10-6/゚F | 0.4~0.8 | 0.4~0.8 | 0.3~0.6 | 0.3~0.5 | |
| True density | g/cm3 | 2.20~2.23 | 2.20~2.23 | 2.20~2.23 | 2.20~2.23 |
| Total porosity | % | 23~29 | 20~26 | 21~26 | 20~25 |
| Ash content | % | Less than 0.2 | Less than 0.2 | Less than 0.2 | Less than 0.2 |
Why are durable graphite electrodes essential for high-temperature industrial processes?
Durable graphite electrodes are indispensable in high-temperature industrial processes such as steelmaking, ferroalloy production, and non-ferrous metal smelting, where temperatures can exceed 3,000°C. These processes rely heavily on the ability of electrodes to endure extreme thermal and mechanical stresses while maintaining structural integrity and consistent performance. The durability of graphite electrodes ensures a longer service life, minimizing the frequency of replacements and reducing costly downtime in continuous production environments.
High durability is achieved through the use of high-purity graphite materials that exhibit exceptional thermal shock resistance, high compressive strength, and low coefficient of thermal expansion. These properties allow the electrodes to withstand rapid temperature changes and intense mechanical loads without cracking or degrading. In addition, durable electrodes maintain stable electrical conductivity even under prolonged exposure to extreme heat, which is crucial for sustaining the high energy levels required in electric arc furnaces and other high-temperature reactors. The ability to endure such harsh conditions not only enhances operational efficiency but also contributes to cost savings and improved safety.
Frequent electrode failures can lead to process interruptions, increased energy consumption, and potential hazards in the working environment. Therefore, investing in durable graphite electrodes is a strategic decision that ensures consistent performance, reduces maintenance needs, and supports the uninterrupted operation of high-temperature industrial processes, ultimately leading to higher productivity and better quality outcomes.
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