About Carbon Electrode Paste
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Carbon Electrode Paste is a self-baking electrode used in submerged Arc furnaces for delivering power to the charge mix. Electrode paste is added to the top of Electrode column in either cylindrical or briquette form. As the paste moves down the column the temperature increases which causes the paste to melt and subsequently form baked block of Electically conductive carbon. Electrode paste is essentially a mix of Electrically Calcined Anthracite (ECA) or Calcined Petroleum Coke (CPC) with Coal Tar Pitch.
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| Manufacturing Process: |
CPC received from our own plant or ECA received from overseas suppliers is screened to different fractions and stored in different hoppers. The various fractions are then weighed using electronic batching system and taken in a bin. The proportions of the fractions are fixed according to the desired properties of electrode paste. The total aggregate is then preheated in sigma type mixer upto 1800C and then liquid coal tar pitch is added at 2000C and mixed. Depending on desired plasticity of Electrode paste, quantity of liquid Coal Tar is added. Coal Tar pitch is used as a binder.
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| Specifications of Carbon Electrode Paste: |
Green Paste |
Property |
Unit |
ECA Based |
CPC Based |
Plasticity |
% |
As per customers requirement,
typical range 30-50
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As per customers requirement,
typical range 30-50
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Fixed Carbon |
% |
83 Min |
87 Min |
Volatile Matter |
% |
11-12 |
12-13 |
Ash |
% |
5.0 Max |
0.5 Max |
Aparent Density |
gm/cc |
1.65 Min |
1.68 Min |
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Property |
Unit |
ECA Based |
CPC Based |
Fixed Carbon |
% |
94 Min |
99 Min
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Porosity |
% |
25 Max |
35 Max |
Aparent Density |
gm/cc |
1.45 Min |
1.40 Min |
Cold Crushing Strength |
kg/cm2 |
250 Min |
200 Min |
Electrical Resistivity |
Ohm.mm2 /meter |
55 to 65 |
85 to 95 |
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| Note : Plasticity can be altered to suit the customer's requirement. We can supply Electrode Paste in both cylinders and briquettes or as per customer's requirement though the most preferred size is 2-4 inch briquettes. MG recommends using ECA based electrode paste for enhanced furnace performance. |
