Graphite Electrode HP For Sale

♦ Excellent high temperature strength.

♦ Very low electric resistance at high temperature.
♦ Good thermal conductivity and low thermal expansion coefficient.
♦ Good thermal shock resistance.
♦ Easy for processing, low material consumption.

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HP Graphite Electrode Description

Graphite electrode is usually used as conductor of electric arc furnace, electric arc generated between graphite electrode and bottom electrode can heat and melt furnace material. According to the rate power, graphite electrodes can be divided into regular power (RP) graphite electrode, high power (HP) graphite electrode, ultra high power (UHP) graphite electrode.

The main raw material of graphite electrode is petrol coke, in regular power graphite electrode, a little amount of pitch coke can be added into the raw material. Both petrol coke and pitch coke should contain no more than 0.5% of sulfur. During producing HP graphite electrode and UHP graphite electrode, needle shape coke should be added into raw material. Petrol coke is the main material for the production of aluminum industry graphite anode, and its sulfur content should not exceed 1.5%~2%.

the Advantages of Graphite Electrode

► It is the best electrode material for electric arc furnace steelmaking.
► High sublimation point, excellent electric conductivity, high mechanical strength.

► Produces CO and CO2 gases when oxidized, won’t contaminate steel.

► The density can be adjusted to obtain the best thermal shock resistance.

► Low price, easy to process, is the ideal industrial material.

Physical & Chemical Properties of HP Graphite Electrodes

Items	Classification	Unit	Nominal Diameter (mm)
			HP Graphite Electrode
			200-400	450-500	550-600
Resistivity	Electrode	μΩm	7	7.5	7.5
Resistivity	Nipple	≤	6.3	6.3	6.3
Bending Strength	Electrode	Mpa	10.5	10	8.5
Bending Strength	Nipple	≥	17	17	17
Young’s Modulus	Electrode	Gpa	14	14	14
Young’s Modulus	Nipple	≤	16	16	16
Bulk Density	Electrode	g/cm3	1.6	1.6	1.6
Bulk Density	Nipple	≥	1.72	1.72	1.72
CTE（100℃-600℃）	Electrode	×10-6/℃	2.4	2.4	2.4
CTE（100℃-600℃）	Nipple	≤	2.2	2.2	2.2
Ash Content	Electrode	%	0.5	0.5	0.5
Ash Content	Nipple	≤	0.5	0.5	0.5

Graphite Electrode HP Current Capacity

Nominal diameter		Permissible current power	The current density (A / cm2)
Millimeter (mm)	Inch (inch)	Permissible current power	The current density (A / cm2)
300	12	10000-13000	17-24
350	14	13500-18000	17-24
400	16	18000-23500	16-24
450	18	22000-27000	16-24
500	20	25000-32000	15-24
600	24	30000-36000	14-24

The Length & Diameter & Permissible Deviation of Graphite Electrode HP

Diameter				Length
Nominal diameter		Actual diameter		Nominal length	tolerance
Millimeters (mm)	Inch (inch)	Max. (Max.)	Min (min)	mm	Length	the maximum
300	12	307	302	1600 1800	± 100	-100	-275
350	14	357	352
400	16	409	403
450	18	460	454
500	20	511	505	1600/1800/2000/2200 1800/2000/2200 1800/2000/2200/2400 1800/2000/2200 1800/2000/2200	± 100	-100	-275

Application of HP Graphite Electrode

The main application of HP graphite electrode is electric furnace steelmaking mill, which consumes about 70~80% of graphite electrode. HP graphite electrode are suitable for EAF furnaces with 18~25A/cm2 current intensity. Meanwhile, HP graphite electrode is also used in ore electric furnaces which are used for making industrial silicon and yellow phosphorous. HP graphite electrodes are also used in resistances such as graphitization furnace for producing graphite products, glass melting furnace and electric furnace for producing silicon carbide.

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