1.DescriptionGrate electrode, mainly petroleum coke, needle coke as raw material, coal pitch as binder, calcination, ingredients, kneading, molding, baking and gratization, machining and made, which is released in electric arc furnace in the form of arc conductor of electricity to heat melting furnace charge, grate electrode with low resistivity,grate electrode good conductivity, grate electrode low ash, grate electrode uniform and grate electrode compact structure, good oxidation resistance, high mechanical strength, etc.2. Technical Data of HP Grate Electrodes
| Items | Classification | Unit | Nominal Diameter (mm) | ||
| HP Grate Electrode | |||||
| 200-400 | 450-500 | 550-600 | |||
| Resistivity | Electrode | μΩm≤ | 7.0 | 7.5 | 7.5 |
| Nipple | 6.3 | 6.3 | 6.3 | ||
| Bending Strength | Electrode | Mpa≥ | 10.5 | 10.0 | 8.5 |
| Nipple | 17.0 | 17.0 | 17.0 | ||
| Young’s Modulus | Electrode | Gpa≤ | 14.0 | 14.0 | 14.0 |
| Nipple | 16.0 | 16.0 | 16.0 | ||
| Bulk Density | Electrode | g/cm3≥ | 1.60 | 1.60 | 1.60 |
| Nipple | 1.72 | 1.72 | 1.72 | ||
| CTE（100℃-600℃） | Electrode | ×10-6/℃≤ | 2.4 | 2.4 | 2.4 |
| Nipple | 2.2 | 2.2 | 2.2 | ||
| Ash Content | Electrode | %≤ | 0.5 | 0.5 | 0.5 |
| Nipple | |||||
3.Recommended current load of HP Grate Electrodes
| Grade | Nominal Dia. | Allowable current A | Current density A/cm2 |
| HP electrode | 200mm | 5500～9000 | 18～25 |
| 250mm | 8000～13000 | 18～25 | |
| 300mm | 13000～17400 | 17～24 | |
| 350mm | 17400～24000 | 17～24 | |
| 400mm | 21000～31000 | 16～24 | |
| 450mm | 25000～40000 | 15～24 | |
| 500mm | 30000～48000 | 15～24 | |
| 550mm | 34000～53000 | 14～22 | |
| 600mm | 38000～58000 | 13～21 |
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