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Description Of RP Graphite Electrode

RP graphite electrodes, referred to moulded columns of graphite, are used as the high temperature conductive material for electric arc furnaces. Regular power graphite electrodes are specified with allowable current density less than 17 A/cm2. The quality of the graphite electrode determines the productivity and cost of EAF steelmaking.

As a manufacturer, we also provide UHP grade graphite electrodes and HP grade graphite electrodes for ultra high power or high power electric arc furnaces. In addition to being used in arc furnaces, graphite electrodes are also widely used in submerged arc furnaces and Ladle furnaces.

FEATURE

  • High current carrying capacity.

  • Outstanding resistance to breakage.

  • High resistance to oxidation and thermal shock.

  • Good dimension stability, not easy to deform.

  • High mechanical strength, low electrical resistance.

  • High machining accuracy, good surface finishing.

APPLICATION

Graphite electrodes are widely used for production of alloy steels, metal and other nonmetallic materials, etc.

the application of rp graphite electrode in ebt electric furnace
the application of rp graphite electrode in arc furnace
the application of rp graphite electrode in electric arc furnace

SPECIFICATION

Table 1: Technical Specification of RP Graphite Electrode

Dia.(inch)Resistance (≤, µΩ·m)Density (≥, g/cm³)Flexure Strength (≥, MPa)Elastic Modulus (≤, GPa)Ash Content (≤, %)CTE (100 °C – 600 °C) (≤, 10-6/°C)Current Load (A)Current Density (A/cm²)
88.51.538.59.30.52.95000-690015-21
98.51.538.59.30.52.96100-860015-21
108.51.538.59.30.52.97000-1000014-20
128.51.538.59.30.52.910000-1300014-18
148.51.527.09.30.52.913500-1800014-18
168.51.527.09.30.52.918000-2350014-18
188.51.527.09.30.52.922000-2700013-17
208.51.527.09.30.52.925000-3200013-16
228.51.527.09.30.52.932000-4000013-16
248.51.527.09.30.52.938000-4700013-16

Table 2: Graphite Electrode Size & Tolerance

Diameter (mm)Length (mm)
Nominal DiameterActual DiameterNominal LengthToleranceShort Length
(inch)(mm)(max.)(min.)(rough spot)±100-275
82002052001971600
92252302252221600/1800
102502562512481600/1800
123003073022991600/1800
143503573523491600/1800
164004094034001600/1800/2000/2200
184504604544511600/1800/2000/2200
205005115055021800/2000/2200/2400
225505625565531800/2000/2200/2400
246006136076042000/2200/2400

SURFACE QUALITY

  • There should be less than two defects or holes on the electrode surface, the maximum size of which is mentioned in the below chart.

  • There should be no transverse crack on the electrode surface. For the longitudinal crack, the length should be less than 5% of the electrode circumference and the width should be 0.3 to 1.0 mm.

  • The width of black area on electrode surface should be less than 1/10 of the electrode circumference and the length should be less than 1/3 of the electrode.

Specification of Defect Dimension

Defect DimensionNominal Diameter of Graphite Electrode (mm)
Specification
300–400450–600
Diameter (mm)20–40
(< 20 mm should be negligible)
30–50
(< 30 mm should be negligible)
Depth (mm)5–10
(< 5 mm should be negligible)
(< 10 mm should be negligible)

DOWNLOAD

File NameLast UpdateFile SizeDownload
JINSH Graphite Electrode Catalog2019.8.233.0MB