Maniyar Group of Industries Entally, Kolkata, WB

Tamping Paste or Ramming Paste is used in the lining of submerged arc furnace. First it is softened by heating and then applied over refractory lining of submerged arc furnace. Tamping Paste of superior quality is required for long life of the furnace lining. Manufacturing Process : The manufacturing process for Tamping Paste is same as for Carbon Electrode Paste. The only difference, being the fraction sizes of ECA/CPC, is different for Tamping Paste & binder pitch content is lower than Carbon Electrode Paste. Specifications of Carbon Electrode Paste : Green PasteProperty UnitECA BasedCPC BasedPlasticity%As per customers requirement, typical range 5-15As per customers requirement, typical range 5-15Fixed Carbon%84 Min88 MinVolatile Matter%10-1111-12Ash%5.0 Max0.5 MaxAparent Densitygm/cc1.60 Min1.60 Min

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.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.

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 180oC and then liquid coal tar pitch is added at 200oC and mixed. Depending on desired plasticity of Electrode paste, quantity of liquid Coal Tar is added. Coal Tar pitch is used as a binder. Specifications of Carbon Electrode Paste : Green PastePropertyUnitECA BasedCPC BasedPlasticity%As per customers requirement, typical range 30-50As per customers requirement, typical range 30-50Fixed Carbon%83 Min87 MinVolatile Matter%11-1212-13Ash%5.0 Max0.5 MaxAparent Densitygm/cc1.65 Min1.68 Min