Artifical grate electrodes is made of high-quality low ash materials,like the petroleum coke,needle coke and coal pitch.After experiencing calcinations,burdening,kneading,forming,baking and pressure impregnation,it is gratized in a hign temperature of over 3000℃, And then treated with kind of product is widely used for electric arc steel-making,yellow srus,indusreial silicon,other alloys and non-metallic materials of electric atc furnace. this product is characterized by low resistivity,good electrical conductivity,low ash,even and compact structure,good antioxidation and high mechanical strength
| High power | ||||||
| Project | Nominal diameter /mm | |||||
| 200-400 | 450-500 | 550-700 | ||||
| Resistivity / | μΩ·m | ≦ | Electrode | 7 | 7.5 | 7.5 |
| Joint | 6.3 | 6.3 | 6.3 | |||
| Flexural strength / | Mpa | ≧ | Electrode | 10.5 | 10 | 8.5 |
| Joint | 17 | 17 | 17 | |||
| Elastic modulus / | Gpa | ≦ | Electrode | 14 | 14 | 14 |
| Joint | 16 | 16 | 16 | |||
| Bulk density / | g/cm3 | ≧ | Electrode | 1.6 | 1.6 | 1.6 |
| Joint | 1.72 | 1.72 | 1.72 | |||
| Thermal expansion coeffi | 10-6/℃ | ≦ | Electrode | 2.4 | 2.4 | 2.4 |
| cient / | Joint | 2.2 | 2.2 | 2.2 | ||
| Ash / % | 　 | ≦ | 　 | 0.5 | 0.5 | 0.5 |
Size and permissble variation of Grate Electrode
| Nominal | Actual diameter | Nominal length | Actual | 　 | |||
| diameter | length | ||||||
| 　 | Maxmum | Minmal | Black part is the | Allow | Short feet | ||
| 　 | smallest | deviation | |||||
| Inches | mm | ||||||
| 10 | 250 | 256 | 251 | 248 |
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