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.

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