ELECTRODE PASTE
Electrode paste is used for forming continuous self-baking electrodes (Soderberg electrodes) in electrical thermal furnaces in ferrous, non-ferrous metallurgy and chemical industry.
| Properties | Units of measurement | Typical values* | |
| Grade | A | C | |
| Unbaked paste | |||
| Coefficient of flowability | 1.6-2.8 | 1.8-2.8 | |
| Volatiles | % | 13 | 13 |
| Mass percent of iron | % | 0.50 | 0.50 |
| Mass percent of silicon | % | 1.40 | 1.40 |
| Mass percent of phosphorus | % | 0.012 | 0.012 |
| Ash content | % | 5 | 5 |
| Baked paste | |||
| Bulk density | g/cm3 | 1.46 | 1.46 |
| Ash content | % | 6 | 6 |
| Rupture strength | MPa | 2.5 | 2.7 |
| Real density | g/cm3 | 1.89 | 1.90 |
| Compression strength | MPa | 25 | 26 |
| Specific electrical resistance | µОhm•m | 80 | 75 |
| Heat conductivity | W/m•K | 2.4 | 2.7 |
The above values are average values and they do not constitute a specification
At the consumer’s request the coefficient of flowability can be set within a range from 1.6 to 2.8 with accuracy of ± 0.2, for example Cf=1.8±0.2
The size and shape of electrode paste briquettes depend on the shape of molds:
– small briquettes (SBEP):
| No. | Average dimensions, mm | Average weight, kg | ||
| 1 | ~105 | ~90 | ~70 | ~0.7 |
| 2 | ~75 | ~80 | ~60 | ~0.32 |
– – large cylindrical blocks (LBEP):
| No. | Designation | Diameter, mm |
Height, mm |
Average weight, kg |
| 1 | LBEP dia. 500х850 | dia. 500±20 | 850+50 | ~270 |
| 2 | LBEP dia. 600х910 | dia. 600±20 | 910+50 | ~430 |
| 3 | LBEP dia. 900х1000 | dia. 900±30 | 1000+50 | ~1010 |
Geometrical dimensions and weight of SBEP and LBEP blocks (including positioning of two pairs of non-through (blind) holes for gripping blocks with load-lifting mechanisms) depend on the equipment and are not regarded as rejection values. The hollows after shrinkage of the paste during LBEP cooling are not regulated.
