The different of HP graphite electrode and UHP graphite electrode

Posted by annesheldon on January 4th, 2018

Ultra-high power graphite electrodes refer to graphite electrodes that allow the use of current densities greater than 25 A / cm2. UHP graphite electrode is mainly used in ultra-high power electric furnace and ladle furnace.

High power graphite electrodes refer to the graphite electrode that allows the use of a current density of 18 ~ 25A / cm2.Graphite electrode has good electrical properties and chemical stability. What’s more, graphite electrode has advantages of high mechanical strength, low impurity content and good vibration resistance. Graphite electrodes are good conductors of heat and electricity.

HP graphite electrode is widely used in steelmaking electric furnace, refining furnaces, production of ferroalloy, industrial silicon, yellow phosphorus, corundum , submerged arc furnaces and other smelting furnaces that produce high temperatures by electric arc.

1.
RP graphite electrode Specification :
Bulk Density : >1.52g/cm3
Specific Resistance : <9.0 Micro Ohm/m
Bending Strength : >7.8 MPa
Young's Modulus : <9.3 GPa
Ash : 0.50% (max)
C.T.E : <2.9 x 10 -6/C

Specification of Nipples:
Bulk Density : >1.68g/cm3
Specific Resistance : <8.5 Micro Ohm/m
Bending Strength : >13.00 MPa
Elastic Modulus : <14.00 GPa
Ash : 0.50% (max)
C.T.E : <2.90 x 10 -6/C (max)
Nipple Thread : 3TPI or 4TPI

2.
HP graphite electrode Specification :
Bulk Density : >1.6g/cm3
Specific Resistance : <7.2 Micro Ohm/m
Bending Strength : >10.5 MPa
Young's Modulus : <12.00 GPa
Ash : 0.30% (max)
C.T.E : <2.4 x 10 -6/C

Specification of Nipples:
Bulk Density : >1.7g/cm3
Specific Resistance : <6.5 Micro Ohm/m
Bending Strength : >14.00 MPa
Elastic Modulus : <16.00 GPa
Ash : 0.30% (max)
C.T.E : <2.20 x 10 -6/C (max)
Nipple Thread : 3TPI or 4TPI

3.
UHP graphite electrode Specification :
Bulk Density : >1.68g/cm3
Specific Resistance : <5.8 Micro Ohm/m
Bending Strength : >18.3 MPa
Young's Modulus : <12.00 GPa
Ash : 0.30% (max)
C.T.E : 1.5 x 10 -6/C

Specification of Nipples:
Bulk Density : >1.78g/cm3
Specific Resistance : <4.3 Micro Ohm/m
Bending Strength : >20.70 MPa
Elastic Modulus : <19.00 GPa
Ash : 0.30% (max)
C.T.E : 1.40 x 10 -6/C (max)
Nipple Thread : 3TPI or 4TPI

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Article Source: HP Graphite electrode
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