HP graphite electrode

HP graphite electrode is used in a high-power smelting furnace and a low-load to medium-load ladle furnace. Electric arc furnace steelmaking is to introduce current into the steelmaking furnace through electrodes, and the strong current passes through the gas at the lower end of the electrode to generate arc discharge. Then heat generated by the arc is used for eaf steelmaking. It is suitable for High-power electric furnaces with high power, high voltage, and short angle.

HP graphite electrode is produced using high quality petroleum coke, needle coke, and coal pitch as raw materials. Then the product is calcined, extruded, roasted, impregnated, graphitized, and machined. So its has good electrical resistance and high mechanical strength. It can be used in DC and AC electric arc furnaces and ladle refining furnaces for smelting various steel alloy sheets.

It has low resistivity and good mechanical strength and can reduce energy consumption and increase production efficiency. During production, steelworkers can improve thermal efficiency and process stability by carefully controlling the power input to an Electric Arc Furnace (EAF).

Key Features:

– High bulk density
– Superior heat conduction
– Relative high electric conductivity
– High machining accuracy
– Faster and more efficient operation
– Longer lifespan

Graphite electrode is essential for steelmaking in Electric Arc Furnaces (EAF). Because they control steelmaking parameters such as temperature, power input, and oxygen content.

Applications.

HP graphite electrodes are widely used in electric arc furnace steelmaking processes such as secondary refining, ladle metallurgy and continuous casting. Its allowed current density is 18-25A/cm².

Also, they are used in specialized applications such as vacuum refining and producing stainless steel, specialty alloys, and other high-value products.

Advantages.

It is a carbon-based material used as a good conductor during the eaf steelmaking process. The electrode energized to generate an arc and uses high temperatures to melt the charge.

They have high power capacity and can carry higher current densities than RP grade. It has thermal shock resistance and oxidation resistance, while reducing power consumption and saving energy.

It is also offer excellent machinability and thermal conductivity. Strong flexural strength, so it can withstand extreme temperatures without breaking. During the eaf steelmaking production process, heat is transferred into the furnace by relying on the thermal effect generated by electric current.

As a leading China graphite electrode manufacturer, we supply competitive prices on premium quality to provide you with cost-effective solutions for your eaf smelting and casting needs.

Physical &Chemical Properties Of Electrode And Nipple

HP Graphite Electrode		Unit	Diameter
HP Graphite Electrode		Unit	12”-16”	18”-22”	24”
Specific resistance	Electrode	μΩ·m ≤	6.8	7.5	≤7.5
Specific resistance	Nipple	μΩ·m ≤	6.2	6.3	≤6.3
Transverse strength	Electrode	ΜРa ≥	10.5	10.8	≥8.5
Transverse strength	Nipple	ΜРa ≥	15.0	15.0	≥17.0
Elastic modulus	Electrode	GРa ≤	12.0	≤12.0	≤14.0
Elastic modulus	Nipple	GРa ≤	16.0	16.0	≤16.0
Bulk Density	Electrode	g∕㎝³ ≥	1.68	1.65	≥1.60
Bulk Density	Nipple	g∕㎝³ ≥	1.74	1.74	≥1.72
C.T.E （100～600℃）	Electrode	10^-6∕℃ ≤	2.3	2.3	≤2.4
C.T.E （100～600℃）	Nipple	10^-6∕℃ ≤	2.1	2.1	≤2.2
Ash content		% ≤	0.3	0.3	≤0.3

Allowable Current-Carrying Capacities

Nominal		HP Graphite Electrodes
mm	inch	Current-Carrying Capacity（A）	Current Density （A/cm²）
300	12	13000~17400	17~24
350	14	17400~24000	17~24
400	16	21000~31000	16~24
450	18	25000~40000	15~24
500	20	30000~48000	15~24
550	22	37000~57000	15~23
600	24	44000-67000	15~23

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HP graphite electrode